s390 updates for the 5.1 merge window

- A copy of Arnds compat wrapper generation series
 
  - Pass information about the KVM guest to the host in form the control
    program code and the control program version code
 
  - Map IOV resources to support PCI physical functions on s390
 
  - Add vector load and store alignment hints to improve performance
 
  - Use the "jdd" constraint with gcc 9 to make jump labels working again
 
  - Remove amode workaround for old z/VM releases from the DCSS code
 
  - Add support for in-kernel performance measurements using the
    CPU measurement counter facility
 
  - Introduce a new PMU device cpum_cf_diag to capture counters and
    store thenn as event raw data.
 
  - Bug fixes and cleanups
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Merge tag 's390-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Martin Schwidefsky:

 - A copy of Arnds compat wrapper generation series

 - Pass information about the KVM guest to the host in form the control
   program code and the control program version code

 - Map IOV resources to support PCI physical functions on s390

 - Add vector load and store alignment hints to improve performance

 - Use the "jdd" constraint with gcc 9 to make jump labels working again

 - Remove amode workaround for old z/VM releases from the DCSS code

 - Add support for in-kernel performance measurements using the CPU
   measurement counter facility

 - Introduce a new PMU device cpum_cf_diag to capture counters and store
   thenn as event raw data.

 - Bug fixes and cleanups

* tag 's390-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (54 commits)
  Revert "s390/cpum_cf: Add kernel message exaplanations"
  s390/dasd: fix read device characteristic with CONFIG_VMAP_STACK=y
  s390/suspend: fix prefix register reset in swsusp_arch_resume
  s390: warn about clearing als implied facilities
  s390: allow overriding facilities via command line
  s390: clean up redundant facilities list setup
  s390/als: remove duplicated in-place implementation of stfle
  s390/cio: Use cpa range elsewhere within vfio-ccw
  s390/cio: Fix vfio-ccw handling of recursive TICs
  s390: vfio_ap: link the vfio_ap devices to the vfio_ap bus subsystem
  s390/cpum_cf: Handle EBUSY return code from CPU counter facility reservation
  s390/cpum_cf: Add kernel message exaplanations
  s390/cpum_cf_diag: Add support for s390 counter facility diagnostic trace
  s390/cpum_cf: add ctr_stcctm() function
  s390/cpum_cf: move common functions into a separate file
  s390/cpum_cf: introduce kernel_cpumcf_avail() function
  s390/cpu_mf: replace stcctm5() with the stcctm() function
  s390/cpu_mf: add store cpu counter multiple instruction support
  s390/cpum_cf: Add minimal in-kernel interface for counter measurements
  s390/cpum_cf: introduce kernel_cpumcf_alert() to obtain measurement alerts
  ...

arch/s390/Kconfig

@@ -75,6 +75,7 @@ config S390
 	select ARCH_HAS_SET_MEMORY
 	select ARCH_HAS_STRICT_KERNEL_RWX
 	select ARCH_HAS_STRICT_MODULE_RWX
+	select ARCH_HAS_SYSCALL_WRAPPER
 	select ARCH_HAS_UBSAN_SANITIZE_ALL
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select ARCH_INLINE_READ_LOCK
@@ -379,6 +380,7 @@ config COMPAT
 	select COMPAT_BINFMT_ELF if BINFMT_ELF
 	select ARCH_WANT_OLD_COMPAT_IPC
 	select COMPAT_OLD_SIGACTION
+	select HAVE_UID16
 	depends on MULTIUSER
 	help
 	  Select this option if you want to enable your system kernel to

arch/s390/boot/als.c

@@ -7,6 +7,7 @@
 #include <asm/facility.h>
 #include <asm/lowcore.h>
 #include <asm/sclp.h>
+#include "boot.h"
 
 /*
  * The code within this file will be called very early. It may _not_
@@ -58,7 +59,7 @@ static void u16_to_decimal(char *str, u16 val)
 	*str = '\0';
 }
 
-static void print_missing_facilities(void)
+void print_missing_facilities(void)
 {
 	static char als_str[80] = "Missing facilities: ";
 	unsigned long val;
@@ -90,7 +91,6 @@ static void print_missing_facilities(void)
 	}
 	strcat(als_str, "\n");
 	sclp_early_printk(als_str);
-	sclp_early_printk("See Principles of Operations for facility bits\n");
 }
 
 static void facility_mismatch(void)
@@ -98,6 +98,7 @@ static void facility_mismatch(void)
 	sclp_early_printk("The Linux kernel requires more recent processor hardware\n");
 	print_machine_type();
 	print_missing_facilities();
+	sclp_early_printk("See Principles of Operations for facility bits\n");
 	disabled_wait(0x8badcccc);
 }
 
@@ -105,20 +106,7 @@ void verify_facilities(void)
 {
 	int i;
 
-	for (i = 0; i < ARRAY_SIZE(S390_lowcore.stfle_fac_list); i++)
+	__stfle(S390_lowcore.stfle_fac_list, ARRAY_SIZE(S390_lowcore.stfle_fac_list));
-		S390_lowcore.stfle_fac_list[i] = 0;
-	asm volatile(
-		"	stfl	0(0)\n"
-		: "=m" (S390_lowcore.stfl_fac_list));
-	S390_lowcore.stfle_fac_list[0] = (u64)S390_lowcore.stfl_fac_list << 32;
-	if (S390_lowcore.stfl_fac_list & 0x01000000) {
-		register unsigned long reg0 asm("0") = ARRAY_SIZE(als) - 1;
-
-		asm volatile(".insn s,0xb2b00000,0(%1)" /* stfle */
-			     : "+d" (reg0)
-			     : "a" (&S390_lowcore.stfle_fac_list)
-			     : "memory", "cc");
-	}
 	for (i = 0; i < ARRAY_SIZE(als); i++) {
 		if ((S390_lowcore.stfle_fac_list[i] & als[i]) != als[i])
 			facility_mismatch();

arch/s390/boot/boot.h

@@ -6,6 +6,8 @@ void startup_kernel(void);
 void detect_memory(void);
 void store_ipl_parmblock(void);
 void setup_boot_command_line(void);
+void parse_boot_command_line(void);
 void setup_memory_end(void);
+void print_missing_facilities(void);
 
 #endif /* BOOT_BOOT_H */

arch/s390/boot/ipl_parm.c

@@ -1,10 +1,12 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/ctype.h>
 #include <asm/ebcdic.h>
 #include <asm/sclp.h>
 #include <asm/sections.h>
 #include <asm/boot_data.h>
+#include <asm/facility.h>
 #include "boot.h"
 
 char __bootdata(early_command_line)[COMMAND_LINE_SIZE];
@@ -143,8 +145,66 @@ void setup_boot_command_line(void)
 		append_ipl_block_parm();
 }
 
+static void modify_facility(unsigned long nr, bool clear)
+{
+	if (clear)
+		__clear_facility(nr, S390_lowcore.stfle_fac_list);
+	else
+		__set_facility(nr, S390_lowcore.stfle_fac_list);
+}
+
+static void check_cleared_facilities(void)
+{
+	unsigned long als[] = { FACILITIES_ALS };
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(als); i++) {
+		if ((S390_lowcore.stfle_fac_list[i] & als[i]) != als[i]) {
+			sclp_early_printk("Warning: The Linux kernel requires facilities cleared via command line option\n");
+			print_missing_facilities();
+			break;
+		}
+	}
+}
+
+static void modify_fac_list(char *str)
+{
+	unsigned long val, endval;
+	char *endp;
+	bool clear;
+
+	while (*str) {
+		clear = false;
+		if (*str == '!') {
+			clear = true;
+			str++;
+		}
+		val = simple_strtoull(str, &endp, 0);
+		if (str == endp)
+			break;
+		str = endp;
+		if (*str == '-') {
+			str++;
+			endval = simple_strtoull(str, &endp, 0);
+			if (str == endp)
+				break;
+			str = endp;
+			while (val <= endval) {
+				modify_facility(val, clear);
+				val++;
+			}
+		} else {
+			modify_facility(val, clear);
+		}
+		if (*str != ',')
+			break;
+		str++;
+	}
+	check_cleared_facilities();
+}
+
 static char command_line_buf[COMMAND_LINE_SIZE] __section(.data);
-static void parse_mem_opt(void)
+void parse_boot_command_line(void)
 {
 	char *param, *val;
 	bool enabled;
@@ -165,12 +225,14 @@ static void parse_mem_opt(void)
 			if (!rc && !enabled)
 				noexec_disabled = 1;
 		}
+
+		if (!strcmp(param, "facilities"))
+			modify_fac_list(val);
 	}
 }
 
 void setup_memory_end(void)
 {
-	parse_mem_opt();
 #ifdef CONFIG_CRASH_DUMP
 	if (!OLDMEM_BASE && early_ipl_block_valid &&
 	    early_ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP &&

arch/s390/boot/startup.c

@@ -53,6 +53,7 @@ void startup_kernel(void)
 	sclp_early_read_info();
 	store_ipl_parmblock();
 	setup_boot_command_line();
+	parse_boot_command_line();
 	setup_memory_end();
 	detect_memory();
 	if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) {

arch/s390/boot/string.c

@@ -2,6 +2,7 @@
 #include <linux/ctype.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
+#undef CONFIG_KASAN
 #include "../lib/string.c"
 
 int strncmp(const char *cs, const char *ct, size_t count)

arch/s390/hypfs/hypfs.h

@@ -43,7 +43,7 @@ int hypfs_diag0c_init(void);
 void hypfs_diag0c_exit(void);
 
 /* Set Partition-Resource Parameter */
-int hypfs_sprp_init(void);
+void hypfs_sprp_init(void);
 void hypfs_sprp_exit(void);
 
 /* debugfs interface */
@@ -69,9 +69,9 @@ struct hypfs_dbfs_file {
 	struct dentry		*dentry;
 };
 
-extern int hypfs_dbfs_init(void);
+extern void hypfs_dbfs_init(void);
 extern void hypfs_dbfs_exit(void);
-extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
+extern void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
 extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
 
 #endif /* _HYPFS_H_ */

arch/s390/hypfs/hypfs_dbfs.c

@@ -78,14 +78,11 @@ static const struct file_operations dbfs_ops = {
 	.unlocked_ioctl = dbfs_ioctl,
 };
 
-int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df)
+void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df)
 {
 	df->dentry = debugfs_create_file(df->name, 0400, dbfs_dir, df,
 					 &dbfs_ops);
-	if (IS_ERR(df->dentry))
-		return PTR_ERR(df->dentry);
 	mutex_init(&df->lock);
-	return 0;
 }
 
 void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df)
@@ -93,10 +90,9 @@ void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df)
 	debugfs_remove(df->dentry);
 }
 
-int hypfs_dbfs_init(void)
+void hypfs_dbfs_init(void)
 {
 	dbfs_dir = debugfs_create_dir("s390_hypfs", NULL);
-	return PTR_ERR_OR_ZERO(dbfs_dir);
 }
 
 void hypfs_dbfs_exit(void)

arch/s390/hypfs/hypfs_diag.c

@@ -440,11 +440,10 @@ __init int hypfs_diag_init(void)
 		pr_err("The hardware system does not support hypfs\n");
 		return -ENODATA;
 	}
-	if (diag204_info_type == DIAG204_INFO_EXT) {
+
-		rc = hypfs_dbfs_create_file(&dbfs_file_d204);
+	if (diag204_info_type == DIAG204_INFO_EXT)
-		if (rc)
+		hypfs_dbfs_create_file(&dbfs_file_d204);
-			return rc;
+
-	}
 	if (MACHINE_IS_LPAR) {
 		rc = diag224_get_name_table();
 		if (rc) {

arch/s390/hypfs/hypfs_diag0c.c

@@ -54,8 +54,7 @@ static void *diag0c_store(unsigned int *count)
 	if (!cpu_vec)
 		goto fail_put_online_cpus;
 	/* Note: Diag 0c needs 8 byte alignment and real storage */
-	diag0c_data = kzalloc(sizeof(struct hypfs_diag0c_hdr) +
+	diag0c_data = kzalloc(struct_size(diag0c_data, entry, cpu_count),
-			      cpu_count * sizeof(struct hypfs_diag0c_entry),
 			      GFP_KERNEL | GFP_DMA);
 	if (!diag0c_data)
 		goto fail_kfree_cpu_vec;
@@ -125,7 +124,8 @@ int __init hypfs_diag0c_init(void)
 {
 	if (!MACHINE_IS_VM)
 		return 0;
-	return hypfs_dbfs_create_file(&dbfs_file_0c);
+	hypfs_dbfs_create_file(&dbfs_file_0c);
+	return 0;
 }
 
 /*

arch/s390/hypfs/hypfs_sprp.c

@@ -137,11 +137,11 @@ static struct hypfs_dbfs_file hypfs_sprp_file = {
 	.unlocked_ioctl = hypfs_sprp_ioctl,
 };
 
-int hypfs_sprp_init(void)
+void hypfs_sprp_init(void)
 {
 	if (!sclp.has_sprp)
-		return 0;
+		return;
-	return hypfs_dbfs_create_file(&hypfs_sprp_file);
+	hypfs_dbfs_create_file(&hypfs_sprp_file);
 }
 
 void hypfs_sprp_exit(void)

arch/s390/hypfs/hypfs_vm.c

@@ -279,7 +279,8 @@ int hypfs_vm_init(void)
 		guest_query = local_guest;
 	else
 		return -EACCES;
-	return hypfs_dbfs_create_file(&dbfs_file_2fc);
+	hypfs_dbfs_create_file(&dbfs_file_2fc);
+	return 0;
 }
 
 void hypfs_vm_exit(void)

arch/s390/hypfs/inode.c

@@ -456,9 +456,8 @@ static int __init hypfs_init(void)
 {
 	int rc;
 
-	rc = hypfs_dbfs_init();
+	hypfs_dbfs_init();
-	if (rc)
+
-		return rc;
 	if (hypfs_diag_init()) {
 		rc = -ENODATA;
 		goto fail_dbfs_exit;
@@ -467,10 +466,7 @@ static int __init hypfs_init(void)
 		rc = -ENODATA;
 		goto fail_hypfs_diag_exit;
 	}
-	if (hypfs_sprp_init()) {
+	hypfs_sprp_init();
-		rc = -ENODATA;
-		goto fail_hypfs_vm_exit;
-	}
 	if (hypfs_diag0c_init()) {
 		rc = -ENODATA;
 		goto fail_hypfs_sprp_exit;
@@ -489,7 +485,6 @@ fail_hypfs_diag0c_exit:
 	hypfs_diag0c_exit();
 fail_hypfs_sprp_exit:
 	hypfs_sprp_exit();
-fail_hypfs_vm_exit:
 	hypfs_vm_exit();
 fail_hypfs_diag_exit:
 	hypfs_diag_exit();

arch/s390/include/asm/cpu_mcf.h

@@ -0,0 +1,126 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Counter facility support definitions for the Linux perf
+ *
+ * Copyright IBM Corp. 2019
+ * Author(s): Hendrik Brueckner <brueckner@linux.ibm.com>
+ */
+#ifndef _ASM_S390_CPU_MCF_H
+#define _ASM_S390_CPU_MCF_H
+
+#include <linux/perf_event.h>
+#include <asm/cpu_mf.h>
+
+enum cpumf_ctr_set {
+	CPUMF_CTR_SET_BASIC   = 0,    /* Basic Counter Set */
+	CPUMF_CTR_SET_USER    = 1,    /* Problem-State Counter Set */
+	CPUMF_CTR_SET_CRYPTO  = 2,    /* Crypto-Activity Counter Set */
+	CPUMF_CTR_SET_EXT     = 3,    /* Extended Counter Set */
+	CPUMF_CTR_SET_MT_DIAG = 4,    /* MT-diagnostic Counter Set */
+
+	/* Maximum number of counter sets */
+	CPUMF_CTR_SET_MAX,
+};
+
+#define CPUMF_LCCTL_ENABLE_SHIFT    16
+#define CPUMF_LCCTL_ACTCTL_SHIFT     0
+static const u64 cpumf_ctr_ctl[CPUMF_CTR_SET_MAX] = {
+	[CPUMF_CTR_SET_BASIC]	= 0x02,
+	[CPUMF_CTR_SET_USER]	= 0x04,
+	[CPUMF_CTR_SET_CRYPTO]	= 0x08,
+	[CPUMF_CTR_SET_EXT]	= 0x01,
+	[CPUMF_CTR_SET_MT_DIAG] = 0x20,
+};
+
+static inline void ctr_set_enable(u64 *state, int ctr_set)
+{
+	*state |= cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT;
+}
+static inline void ctr_set_disable(u64 *state, int ctr_set)
+{
+	*state &= ~(cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT);
+}
+static inline void ctr_set_start(u64 *state, int ctr_set)
+{
+	*state |= cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT;
+}
+static inline void ctr_set_stop(u64 *state, int ctr_set)
+{
+	*state &= ~(cpumf_ctr_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT);
+}
+
+static inline void ctr_set_multiple_enable(u64 *state, u64 ctrsets)
+{
+	*state |= ctrsets << CPUMF_LCCTL_ENABLE_SHIFT;
+}
+
+static inline void ctr_set_multiple_disable(u64 *state, u64 ctrsets)
+{
+	*state &= ~(ctrsets << CPUMF_LCCTL_ENABLE_SHIFT);
+}
+
+static inline void ctr_set_multiple_start(u64 *state, u64 ctrsets)
+{
+	*state |= ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT;
+}
+
+static inline void ctr_set_multiple_stop(u64 *state, u64 ctrsets)
+{
+	*state &= ~(ctrsets << CPUMF_LCCTL_ACTCTL_SHIFT);
+}
+
+static inline int ctr_stcctm(enum cpumf_ctr_set set, u64 range, u64 *dest)
+{
+	switch (set) {
+	case CPUMF_CTR_SET_BASIC:
+		return stcctm(BASIC, range, dest);
+	case CPUMF_CTR_SET_USER:
+		return stcctm(PROBLEM_STATE, range, dest);
+	case CPUMF_CTR_SET_CRYPTO:
+		return stcctm(CRYPTO_ACTIVITY, range, dest);
+	case CPUMF_CTR_SET_EXT:
+		return stcctm(EXTENDED, range, dest);
+	case CPUMF_CTR_SET_MT_DIAG:
+		return stcctm(MT_DIAG_CLEARING, range, dest);
+	case CPUMF_CTR_SET_MAX:
+		return 3;
+	}
+	return 3;
+}
+
+struct cpu_cf_events {
+	struct cpumf_ctr_info	info;
+	atomic_t		ctr_set[CPUMF_CTR_SET_MAX];
+	atomic64_t		alert;
+	u64			state, tx_state;
+	unsigned int		flags;
+	unsigned int		txn_flags;
+};
+DECLARE_PER_CPU(struct cpu_cf_events, cpu_cf_events);
+
+bool kernel_cpumcf_avail(void);
+int __kernel_cpumcf_begin(void);
+unsigned long kernel_cpumcf_alert(int clear);
+void __kernel_cpumcf_end(void);
+
+static inline int kernel_cpumcf_begin(void)
+{
+	if (!cpum_cf_avail())
+		return -ENODEV;
+
+	preempt_disable();
+	return __kernel_cpumcf_begin();
+}
+static inline void kernel_cpumcf_end(void)
+{
+	__kernel_cpumcf_end();
+	preempt_enable();
+}
+
+/* Return true if store counter set multiple instruction is available */
+static inline int stccm_avail(void)
+{
+	return test_facility(142);
+}
+
+#endif /* _ASM_S390_CPU_MCF_H */

arch/s390/include/asm/cpu_mf-insn.h

@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Support for CPU-MF instructions
+ *
+ * Copyright IBM Corp. 2019
+ * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
+ */
+#ifndef _ASM_S390_CPU_MF_INSN_H
+#define _ASM_S390_CPU_MF_INSN_H
+
+#ifdef __ASSEMBLY__
+
+/* Macro to generate the STCCTM instruction with a customized
+ * M3 field designating the counter set.
+ */
+.macro	STCCTM	r1 m3 db2
+	.insn	rsy,0xeb0000000017,\r1,\m3 & 0xf,\db2
+.endm
+
+#endif /* __ASSEMBLY__ */
+
+#endif

arch/s390/include/asm/cpu_mf.h

@@ -12,6 +12,8 @@
 #include <linux/errno.h>
 #include <asm/facility.h>
 
+asm(".include \"asm/cpu_mf-insn.h\"\n");
+
 #define CPU_MF_INT_SF_IAE	(1 << 31)	/* invalid entry address */
 #define CPU_MF_INT_SF_ISE	(1 << 30)	/* incorrect SDBT entry */
 #define CPU_MF_INT_SF_PRA	(1 << 29)	/* program request alert */
@@ -209,17 +211,25 @@ static inline int ecctr(u64 ctr, u64 *val)
 	return cc;
 }
 
-/* Store CPU counter multiple for the MT utilization counter set */
+/* Store CPU counter multiple for a particular counter set */
-static inline int stcctm5(u64 num, u64 *val)
+enum stcctm_ctr_set {
+	EXTENDED = 0,
+	BASIC = 1,
+	PROBLEM_STATE = 2,
+	CRYPTO_ACTIVITY = 3,
+	MT_DIAG = 5,
+	MT_DIAG_CLEARING = 9,	/* clears loss-of-MT-ctr-data alert */
+};
+static inline int stcctm(enum stcctm_ctr_set set, u64 range, u64 *dest)
 {
 	int cc;
 
 	asm volatile (
-		"	.insn	rsy,0xeb0000000017,%2,5,%1\n"
+		"	STCCTM	%2,%3,%1\n"
 		"	ipm	%0\n"
 		"	srl	%0,28\n"
 		: "=d" (cc)
-		: "Q" (*val), "d" (num)
+		: "Q" (*dest), "d" (range), "i" (set)
 		: "cc", "memory");
 	return cc;
 }

arch/s390/include/asm/diag.h

@@ -32,6 +32,7 @@ enum diag_stat_enum {
 	DIAG_STAT_X2FC,
 	DIAG_STAT_X304,
 	DIAG_STAT_X308,
+	DIAG_STAT_X318,
 	DIAG_STAT_X500,
 	NR_DIAG_STAT
 };
@@ -293,6 +294,17 @@ struct diag26c_mac_resp {
 	u8	res[2];
 } __aligned(8);
 
+#define CPNC_LINUX		0x4
+union diag318_info {
+	unsigned long val;
+	struct {
+		unsigned int cpnc : 8;
+		unsigned int cpvc_linux : 24;
+		unsigned char cpvc_distro[3];
+		unsigned char zero;
+	};
+};
+
 int diag204(unsigned long subcode, unsigned long size, void *addr);
 int diag224(void *ptr);
 int diag26c(void *req, void *resp, enum diag26c_sc subcode);

arch/s390/include/asm/ftrace.h

@@ -81,5 +81,30 @@ static inline void ftrace_generate_call_insn(struct ftrace_insn *insn,
 #endif
 }
 
+/*
+ * Even though the system call numbers are identical for s390/s390x a
+ * different system call table is used for compat tasks. This may lead
+ * to e.g. incorrect or missing trace event sysfs files.
+ * Therefore simply do not trace compat system calls at all.
+ * See kernel/trace/trace_syscalls.c.
+ */
+#define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS
+static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs)
+{
+	return is_compat_task();
+}
+
+#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
+static inline bool arch_syscall_match_sym_name(const char *sym,
+					       const char *name)
+{
+	/*
+	 * Skip __s390_ and __s390x_ prefix - due to compat wrappers
+	 * and aliasing some symbols of 64 bit system call functions
+	 * may get the __s390_ prefix instead of the __s390x_ prefix.
+	 */
+	return !strcmp(sym + 7, name) || !strcmp(sym + 8, name);
+}
+
 #endif /* __ASSEMBLY__ */
 #endif /* _ASM_S390_FTRACE_H */

arch/s390/include/asm/jump_label.h

@@ -10,6 +10,12 @@
 #define JUMP_LABEL_NOP_SIZE 6
 #define JUMP_LABEL_NOP_OFFSET 2
 
+#if __GNUC__ < 9
+#define JUMP_LABEL_STATIC_KEY_CONSTRAINT "X"
+#else
+#define JUMP_LABEL_STATIC_KEY_CONSTRAINT "jdd"
+#endif
+
 /*
  * We use a brcl 0,2 instruction for jump labels at compile time so it
  * can be easily distinguished from a hotpatch generated instruction.
@@ -20,9 +26,9 @@ static inline bool arch_static_branch(struct static_key *key, bool branch)
 			  ".pushsection __jump_table,\"aw\"\n"
 			  ".balign	8\n"
 			  ".long	0b-.,%l[label]-.\n"
-			  ".quad	%0-.\n"
+			  ".quad	%0+%1-.\n"
 			  ".popsection\n"
-			  : : "X" (&((char *)key)[branch]) : : label);
+			  : : JUMP_LABEL_STATIC_KEY_CONSTRAINT (key), "i" (branch) : : label);
 	return false;
 label:
 	return true;
@@ -34,9 +40,9 @@ static inline bool arch_static_branch_jump(struct static_key *key, bool branch)
 			  ".pushsection __jump_table,\"aw\"\n"
 			  ".balign	8\n"
 			  ".long	0b-.,%l[label]-.\n"
-			  ".quad	%0-.\n"
+			  ".quad	%0+%1-.\n"
 			  ".popsection\n"
-			  : : "X" (&((char *)key)[branch]) : : label);
+			  : : JUMP_LABEL_STATIC_KEY_CONSTRAINT (key), "i" (branch) : : label);
 	return false;
 label:
 	return true;

arch/s390/include/asm/pci.h

@@ -148,7 +148,6 @@ struct zpci_dev {
 	enum pci_bus_speed max_bus_speed;
 
 	struct dentry	*debugfs_dev;
-	struct dentry	*debugfs_perf;
 
 	struct s390_domain *s390_domain; /* s390 IOMMU domain data */
 };

arch/s390/include/asm/perf_event.h

@@ -12,7 +12,6 @@
 
 #include <linux/perf_event.h>
 #include <linux/device.h>
-#include <asm/cpu_mf.h>
 
 /* Per-CPU flags for PMU states */
 #define PMU_F_RESERVED			0x1000
@@ -55,6 +54,7 @@ struct perf_sf_sde_regs {
 #define PERF_CPUM_SF_MAX_CTR		2
 #define PERF_EVENT_CPUM_SF		0xB0000UL /* Event: Basic-sampling */
 #define PERF_EVENT_CPUM_SF_DIAG		0xBD000UL /* Event: Combined-sampling */
+#define PERF_EVENT_CPUM_CF_DIAG		0xBC000UL /* Event: Counter sets */
 #define PERF_CPUM_SF_BASIC_MODE		0x0001	  /* Basic-sampling flag */
 #define PERF_CPUM_SF_DIAG_MODE		0x0002	  /* Diagnostic-sampling flag */
 #define PERF_CPUM_SF_MODE_MASK		(PERF_CPUM_SF_BASIC_MODE| \

arch/s390/include/asm/qdio.h

@@ -361,8 +361,8 @@ struct qdio_initialize {
 					  unsigned long);
 	int scan_threshold;
 	unsigned long int_parm;
-	void **input_sbal_addr_array;
+	struct qdio_buffer **input_sbal_addr_array;
-	void **output_sbal_addr_array;
+	struct qdio_buffer **output_sbal_addr_array;
 	struct qdio_outbuf_state *output_sbal_state_array;
 };
 

arch/s390/include/asm/sclp.h

@@ -78,6 +78,7 @@ struct sclp_info {
 	unsigned char has_skey : 1;
 	unsigned char has_kss : 1;
 	unsigned char has_gisaf : 1;
+	unsigned char has_diag318 : 1;
 	unsigned int ibc;
 	unsigned int mtid;
 	unsigned int mtid_cp;

arch/s390/include/asm/string.h

@@ -12,15 +12,21 @@
 #include <linux/types.h>
 #endif
 
-#define __HAVE_ARCH_MEMCHR	/* inline & arch function */
-#define __HAVE_ARCH_MEMCMP	/* arch function */
 #define __HAVE_ARCH_MEMCPY	/* gcc builtin & arch function */
 #define __HAVE_ARCH_MEMMOVE	/* gcc builtin & arch function */
-#define __HAVE_ARCH_MEMSCAN	/* inline & arch function */
 #define __HAVE_ARCH_MEMSET	/* gcc builtin & arch function */
 #define __HAVE_ARCH_MEMSET16	/* arch function */
 #define __HAVE_ARCH_MEMSET32	/* arch function */
 #define __HAVE_ARCH_MEMSET64	/* arch function */
+
+void *memcpy(void *dest, const void *src, size_t n);
+void *memset(void *s, int c, size_t n);
+void *memmove(void *dest, const void *src, size_t n);
+
+#ifndef CONFIG_KASAN
+#define __HAVE_ARCH_MEMCHR	/* inline & arch function */
+#define __HAVE_ARCH_MEMCMP	/* arch function */
+#define __HAVE_ARCH_MEMSCAN	/* inline & arch function */
 #define __HAVE_ARCH_STRCAT	/* inline & arch function */
 #define __HAVE_ARCH_STRCMP	/* arch function */
 #define __HAVE_ARCH_STRCPY	/* inline & arch function */
@@ -35,9 +41,6 @@
 
 /* Prototypes for non-inlined arch strings functions. */
 int memcmp(const void *s1, const void *s2, size_t n);
-void *memcpy(void *dest, const void *src, size_t n);
-void *memset(void *s, int c, size_t n);
-void *memmove(void *dest, const void *src, size_t n);
 int strcmp(const char *s1, const char *s2);
 size_t strlcat(char *dest, const char *src, size_t n);
 size_t strlcpy(char *dest, const char *src, size_t size);
@@ -45,6 +48,7 @@ char *strncat(char *dest, const char *src, size_t n);
 char *strncpy(char *dest, const char *src, size_t n);
 char *strrchr(const char *s, int c);
 char *strstr(const char *s1, const char *s2);
+#endif /* !CONFIG_KASAN */
 
 #undef __HAVE_ARCH_STRCHR
 #undef __HAVE_ARCH_STRNCHR
@@ -95,6 +99,7 @@ static inline void *memset64(uint64_t *s, uint64_t v, size_t count)
 
 #if !defined(IN_ARCH_STRING_C) && (!defined(CONFIG_FORTIFY_SOURCE) || defined(__NO_FORTIFY))
 
+#ifdef __HAVE_ARCH_MEMCHR
 static inline void *memchr(const void * s, int c, size_t n)
 {
 	register int r0 asm("0") = (char) c;
@@ -109,7 +114,9 @@ static inline void *memchr(const void * s, int c, size_t n)
 		: "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
 	return (void *) ret;
 }
+#endif
 
+#ifdef __HAVE_ARCH_MEMSCAN
 static inline void *memscan(void *s, int c, size_t n)
 {
 	register int r0 asm("0") = (char) c;
@@ -121,7 +128,9 @@ static inline void *memscan(void *s, int c, size_t n)
 		: "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
 	return (void *) ret;
 }
+#endif
 
+#ifdef __HAVE_ARCH_STRCAT
 static inline char *strcat(char *dst, const char *src)
 {
 	register int r0 asm("0") = 0;
@@ -137,7 +146,9 @@ static inline char *strcat(char *dst, const char *src)
 		: "d" (r0), "0" (0) : "cc", "memory" );
 	return ret;
 }
+#endif
 
+#ifdef __HAVE_ARCH_STRCPY
 static inline char *strcpy(char *dst, const char *src)
 {
 	register int r0 asm("0") = 0;
@@ -150,7 +161,9 @@ static inline char *strcpy(char *dst, const char *src)
 		: "cc", "memory");
 	return ret;
 }
+#endif
 
+#ifdef __HAVE_ARCH_STRLEN
 static inline size_t strlen(const char *s)
 {
 	register unsigned long r0 asm("0") = 0;
@@ -162,7 +175,9 @@ static inline size_t strlen(const char *s)
 		: "+d" (r0), "+a" (tmp) :  : "cc", "memory");
 	return r0 - (unsigned long) s;
 }
+#endif
 
+#ifdef __HAVE_ARCH_STRNLEN
 static inline size_t strnlen(const char * s, size_t n)
 {
 	register int r0 asm("0") = 0;
@@ -175,6 +190,7 @@ static inline size_t strnlen(const char * s, size_t n)
 		: "+a" (end), "+a" (tmp) : "d" (r0)  : "cc", "memory");
 	return end - s;
 }
+#endif
 #else /* IN_ARCH_STRING_C */
 void *memchr(const void * s, int c, size_t n);
 void *memscan(void *s, int c, size_t n);

arch/s390/include/asm/syscall_wrapper.h

@@ -0,0 +1,135 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * syscall_wrapper.h - s390 specific wrappers to syscall definitions
+ *
+ */
+
+#ifndef _ASM_S390_SYSCALL_WRAPPER_H
+#define _ASM_S390_SYSCALL_WRAPPER_H
+
+#ifdef CONFIG_COMPAT
+#define __SC_COMPAT_TYPE(t, a) \
+	__typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a
+
+#define __SC_COMPAT_CAST(t, a)						\
+({									\
+	long __ReS = a;							\
+									\
+	BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) &&		\
+		     !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t) &&		\
+		     !__TYPE_IS_LL(t));					\
+	if (__TYPE_IS_L(t))						\
+		__ReS = (s32)a;						\
+	if (__TYPE_IS_UL(t))						\
+		__ReS = (u32)a;						\
+	if (__TYPE_IS_PTR(t))						\
+		__ReS = a & 0x7fffffff;					\
+	if (__TYPE_IS_LL(t))						\
+		return -ENOSYS;						\
+	(t)__ReS;							\
+})
+
+#define __S390_SYS_STUBx(x, name, ...)					\
+	asmlinkage long __s390_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
+	ALLOW_ERROR_INJECTION(__s390_sys##name, ERRNO);			\
+	asmlinkage long __s390_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
+	{								\
+		long ret = __s390x_sys##name(__MAP(x,__SC_COMPAT_CAST,__VA_ARGS__));\
+		__MAP(x,__SC_TEST,__VA_ARGS__);				\
+		return ret;						\
+	}
+
+/*
+ * To keep the naming coherent, re-define SYSCALL_DEFINE0 to create an alias
+ * named __s390x_sys_*()
+ */
+#define COMPAT_SYSCALL_DEFINE0(sname)					\
+	SYSCALL_METADATA(_##sname, 0);					\
+	asmlinkage long __s390_compat_sys_##sname(void);		\
+	ALLOW_ERROR_INJECTION(__s390_compat__sys_##sname, ERRNO);	\
+	asmlinkage long __s390_compat_sys_##sname(void)
+
+#define SYSCALL_DEFINE0(sname)						\
+	SYSCALL_METADATA(_##sname, 0);					\
+	asmlinkage long __s390x_sys_##sname(void);			\
+	ALLOW_ERROR_INJECTION(__s390x_sys_##sname, ERRNO);		\
+	asmlinkage long __s390_sys_##sname(void)			\
+		__attribute__((alias(__stringify(__s390x_sys_##sname)))); \
+	asmlinkage long __s390x_sys_##sname(void)
+
+#define COND_SYSCALL(name)						\
+	cond_syscall(__s390x_sys_##name);				\
+	cond_syscall(__s390_sys_##name)
+
+#define SYS_NI(name)							\
+	SYSCALL_ALIAS(__s390x_sys_##name, sys_ni_posix_timers);		\
+	SYSCALL_ALIAS(__s390_sys_##name, sys_ni_posix_timers)
+
+#define COMPAT_SYSCALL_DEFINEx(x, name, ...)					\
+	__diag_push();								\
+	__diag_ignore(GCC, 8, "-Wattribute-alias",				\
+		      "Type aliasing is used to sanitize syscall arguments");\
+	asmlinkage long __s390_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));	\
+	asmlinkage long __s390_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))	\
+		__attribute__((alias(__stringify(__se_compat_sys##name))));	\
+	ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO);				\
+	static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
+	asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));	\
+	asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))	\
+	{									\
+		long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
+		__MAP(x,__SC_TEST,__VA_ARGS__);					\
+		return ret;							\
+	}									\
+	__diag_pop();								\
+	static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
+
+/*
+ * As some compat syscalls may not be implemented, we need to expand
+ * COND_SYSCALL_COMPAT in kernel/sys_ni.c and COMPAT_SYS_NI in
+ * kernel/time/posix-stubs.c to cover this case as well.
+ */
+#define COND_SYSCALL_COMPAT(name)					\
+	cond_syscall(__s390_compat_sys_##name)
+
+#define COMPAT_SYS_NI(name)						\
+	SYSCALL_ALIAS(__s390_compat_sys_##name, sys_ni_posix_timers)
+
+#else /* CONFIG_COMPAT */
+
+#define __S390_SYS_STUBx(x, fullname, name, ...)
+
+#define SYSCALL_DEFINE0(sname)						\
+	SYSCALL_METADATA(_##sname, 0);					\
+	asmlinkage long __s390x_sys_##sname(void);			\
+	ALLOW_ERROR_INJECTION(__s390x_sys_##sname, ERRNO);		\
+	asmlinkage long __s390x_sys_##sname(void)
+
+#define COND_SYSCALL(name)						\
+	cond_syscall(__s390x_sys_##name)
+
+#define SYS_NI(name)							\
+	SYSCALL_ALIAS(__s390x_sys_##name, sys_ni_posix_timers);
+
+#endif /* CONFIG_COMPAT */
+
+#define __SYSCALL_DEFINEx(x, name, ...)						\
+	__diag_push();								\
+	__diag_ignore(GCC, 8, "-Wattribute-alias",				\
+		      "Type aliasing is used to sanitize syscall arguments");\
+	asmlinkage long __s390x_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))	\
+		__attribute__((alias(__stringify(__se_sys##name))));		\
+	ALLOW_ERROR_INJECTION(__s390x_sys##name, ERRNO);				\
+	static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));		\
+	static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));	\
+	__S390_SYS_STUBx(x, name, __VA_ARGS__)					\
+	asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))		\
+	{									\
+		long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));	\
+		__MAP(x,__SC_TEST,__VA_ARGS__);					\
+		return ret;							\
+	}									\
+	__diag_pop();								\
+	static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
+
+#endif /* _ASM_X86_SYSCALL_WRAPPER_H */

arch/s390/include/asm/vx-insn.h

@@ -363,23 +363,23 @@
 .endm
 
 /* VECTOR LOAD MULTIPLE */
-.macro	VLM	vfrom, vto, disp, base
+.macro	VLM	vfrom, vto, disp, base, hint=3
 	VX_NUM	v1, \vfrom
 	VX_NUM	v3, \vto
 	GR_NUM	b2, \base	    /* Base register */
 	.word	0xE700 | ((v1&15) << 4) | (v3&15)
 	.word	(b2 << 12) | (\disp)
-	MRXBOPC	0, 0x36, v1, v3
+	MRXBOPC	\hint, 0x36, v1, v3
 .endm
 
 /* VECTOR STORE MULTIPLE */
-.macro	VSTM	vfrom, vto, disp, base
+.macro	VSTM	vfrom, vto, disp, base, hint=3
 	VX_NUM	v1, \vfrom
 	VX_NUM	v3, \vto
 	GR_NUM	b2, \base	    /* Base register */
 	.word	0xE700 | ((v1&15) << 4) | (v3&15)
 	.word	(b2 << 12) | (\disp)
-	MRXBOPC	0, 0x3E, v1, v3
+	MRXBOPC	\hint, 0x3E, v1, v3
 .endm
 
 /* VECTOR PERMUTE */

arch/s390/include/uapi/asm/posix_types.h

@@ -20,6 +20,12 @@ typedef long            __kernel_ssize_t;
 typedef unsigned short	__kernel_old_dev_t;
 #define __kernel_old_dev_t __kernel_old_dev_t
 
+#ifdef __KERNEL__
+typedef unsigned short __kernel_old_uid_t;
+typedef unsigned short __kernel_old_gid_t;
+#define __kernel_old_uid_t __kernel_old_uid_t
+#endif
+
 #ifndef __s390x__
 
 typedef unsigned long   __kernel_ino_t;

arch/s390/kernel/Makefile

@@ -65,7 +65,7 @@ obj-$(CONFIG_HIBERNATION)	+= suspend.o swsusp.o
 obj-$(CONFIG_AUDIT)		+= audit.o
 compat-obj-$(CONFIG_AUDIT)	+= compat_audit.o
 obj-$(CONFIG_COMPAT)		+= compat_linux.o compat_signal.o
-obj-$(CONFIG_COMPAT)		+= compat_wrapper.o $(compat-obj-y)
+obj-$(CONFIG_COMPAT)		+= $(compat-obj-y)
 obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 obj-$(CONFIG_STACKTRACE)	+= stacktrace.o
 obj-$(CONFIG_KPROBES)		+= kprobes.o
@@ -77,8 +77,10 @@ obj-$(CONFIG_JUMP_LABEL)	+= jump_label.o
 obj-$(CONFIG_KEXEC_FILE)	+= machine_kexec_file.o kexec_image.o
 obj-$(CONFIG_KEXEC_FILE)	+= kexec_elf.o
 
-obj-$(CONFIG_PERF_EVENTS)	+= perf_event.o perf_cpum_cf.o perf_cpum_sf.o
+obj-$(CONFIG_PERF_EVENTS)	+= perf_event.o perf_cpum_cf_common.o
+obj-$(CONFIG_PERF_EVENTS)	+= perf_cpum_cf.o perf_cpum_sf.o
 obj-$(CONFIG_PERF_EVENTS)	+= perf_cpum_cf_events.o perf_regs.o
+obj-$(CONFIG_PERF_EVENTS)	+= perf_cpum_cf_diag.o
 
 obj-$(CONFIG_TRACEPOINTS)	+= trace.o
 

arch/s390/kernel/compat_linux.c

@@ -34,7 +34,6 @@
 #include <linux/stat.h>
 #include <linux/filter.h>
 #include <linux/highmem.h>
-#include <linux/highuid.h>
 #include <linux/mman.h>
 #include <linux/ipv6.h>
 #include <linux/in.h>
@@ -58,245 +57,13 @@
 
 #include "compat_linux.h"
 
-/* For this source file, we want overflow handling. */
-
-#undef high2lowuid
-#undef high2lowgid
-#undef low2highuid
-#undef low2highgid
-#undef SET_UID16
-#undef SET_GID16
-#undef NEW_TO_OLD_UID
-#undef NEW_TO_OLD_GID
-#undef SET_OLDSTAT_UID
-#undef SET_OLDSTAT_GID
-#undef SET_STAT_UID
-#undef SET_STAT_GID
-
-#define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
-#define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
-#define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid)
-#define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid)
-#define SET_UID16(var, uid)	var = high2lowuid(uid)
-#define SET_GID16(var, gid)	var = high2lowgid(gid)
-#define NEW_TO_OLD_UID(uid)	high2lowuid(uid)
-#define NEW_TO_OLD_GID(gid)	high2lowgid(gid)
-#define SET_OLDSTAT_UID(stat, uid)	(stat).st_uid = high2lowuid(uid)
-#define SET_OLDSTAT_GID(stat, gid)	(stat).st_gid = high2lowgid(gid)
-#define SET_STAT_UID(stat, uid)		(stat).st_uid = high2lowuid(uid)
-#define SET_STAT_GID(stat, gid)		(stat).st_gid = high2lowgid(gid)
-
-COMPAT_SYSCALL_DEFINE3(s390_chown16, const char __user *, filename,
-		       u16, user, u16, group)
-{
-	return ksys_chown(filename, low2highuid(user), low2highgid(group));
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_lchown16, const char __user *,
-		       filename, u16, user, u16, group)
-{
-	return ksys_lchown(filename, low2highuid(user), low2highgid(group));
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_fchown16, unsigned int, fd, u16, user, u16, group)
-{
-	return ksys_fchown(fd, low2highuid(user), low2highgid(group));
-}
-
-COMPAT_SYSCALL_DEFINE2(s390_setregid16, u16, rgid, u16, egid)
-{
-	return sys_setregid(low2highgid(rgid), low2highgid(egid));
-}
-
-COMPAT_SYSCALL_DEFINE1(s390_setgid16, u16, gid)
-{
-	return sys_setgid(low2highgid(gid));
-}
-
-COMPAT_SYSCALL_DEFINE2(s390_setreuid16, u16, ruid, u16, euid)
-{
-	return sys_setreuid(low2highuid(ruid), low2highuid(euid));
-}
-
-COMPAT_SYSCALL_DEFINE1(s390_setuid16, u16, uid)
-{
-	return sys_setuid(low2highuid(uid));
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_setresuid16, u16, ruid, u16, euid, u16, suid)
-{
-	return sys_setresuid(low2highuid(ruid), low2highuid(euid),
-			     low2highuid(suid));
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_getresuid16, u16 __user *, ruidp,
-		       u16 __user *, euidp, u16 __user *, suidp)
-{
-	const struct cred *cred = current_cred();
-	int retval;
-	u16 ruid, euid, suid;
-
-	ruid = high2lowuid(from_kuid_munged(cred->user_ns, cred->uid));
-	euid = high2lowuid(from_kuid_munged(cred->user_ns, cred->euid));
-	suid = high2lowuid(from_kuid_munged(cred->user_ns, cred->suid));
-
-	if (!(retval   = put_user(ruid, ruidp)) &&
-	    !(retval   = put_user(euid, euidp)))
-		retval = put_user(suid, suidp);
-
-	return retval;
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_setresgid16, u16, rgid, u16, egid, u16, sgid)
-{
-	return sys_setresgid(low2highgid(rgid), low2highgid(egid),
-			     low2highgid(sgid));
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_getresgid16, u16 __user *, rgidp,
-		       u16 __user *, egidp, u16 __user *, sgidp)
-{
-	const struct cred *cred = current_cred();
-	int retval;
-	u16 rgid, egid, sgid;
-
-	rgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->gid));
-	egid = high2lowgid(from_kgid_munged(cred->user_ns, cred->egid));
-	sgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->sgid));
-
-	if (!(retval   = put_user(rgid, rgidp)) &&
-	    !(retval   = put_user(egid, egidp)))
-		retval = put_user(sgid, sgidp);
-
-	return retval;
-}
-
-COMPAT_SYSCALL_DEFINE1(s390_setfsuid16, u16, uid)
-{
-	return sys_setfsuid(low2highuid(uid));
-}
-
-COMPAT_SYSCALL_DEFINE1(s390_setfsgid16, u16, gid)
-{
-	return sys_setfsgid(low2highgid(gid));
-}
-
-static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
-{
-	struct user_namespace *user_ns = current_user_ns();
-	int i;
-	u16 group;
-	kgid_t kgid;
-
-	for (i = 0; i < group_info->ngroups; i++) {
-		kgid = group_info->gid[i];
-		group = (u16)from_kgid_munged(user_ns, kgid);
-		if (put_user(group, grouplist+i))
-			return -EFAULT;
-	}
-
-	return 0;
-}
-
-static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
-{
-	struct user_namespace *user_ns = current_user_ns();
-	int i;
-	u16 group;
-	kgid_t kgid;
-
-	for (i = 0; i < group_info->ngroups; i++) {
-		if (get_user(group, grouplist+i))
-			return  -EFAULT;
-
-		kgid = make_kgid(user_ns, (gid_t)group);
-		if (!gid_valid(kgid))
-			return -EINVAL;
-
-		group_info->gid[i] = kgid;
-	}
-
-	return 0;
-}
-
-COMPAT_SYSCALL_DEFINE2(s390_getgroups16, int, gidsetsize, u16 __user *, grouplist)
-{
-	const struct cred *cred = current_cred();
-	int i;
-
-	if (gidsetsize < 0)
-		return -EINVAL;
-
-	get_group_info(cred->group_info);
-	i = cred->group_info->ngroups;
-	if (gidsetsize) {
-		if (i > gidsetsize) {
-			i = -EINVAL;
-			goto out;
-		}
-		if (groups16_to_user(grouplist, cred->group_info)) {
-			i = -EFAULT;
-			goto out;
-		}
-	}
-out:
-	put_group_info(cred->group_info);
-	return i;
-}
-
-COMPAT_SYSCALL_DEFINE2(s390_setgroups16, int, gidsetsize, u16 __user *, grouplist)
-{
-	struct group_info *group_info;
-	int retval;
-
-	if (!may_setgroups())
-		return -EPERM;
-	if ((unsigned)gidsetsize > NGROUPS_MAX)
-		return -EINVAL;
-
-	group_info = groups_alloc(gidsetsize);
-	if (!group_info)
-		return -ENOMEM;
-	retval = groups16_from_user(group_info, grouplist);
-	if (retval) {
-		put_group_info(group_info);
-		return retval;
-	}
-
-	groups_sort(group_info);
-	retval = set_current_groups(group_info);
-	put_group_info(group_info);
-
-	return retval;
-}
-
-COMPAT_SYSCALL_DEFINE0(s390_getuid16)
-{
-	return high2lowuid(from_kuid_munged(current_user_ns(), current_uid()));
-}
-
-COMPAT_SYSCALL_DEFINE0(s390_geteuid16)
-{
-	return high2lowuid(from_kuid_munged(current_user_ns(), current_euid()));
-}
-
-COMPAT_SYSCALL_DEFINE0(s390_getgid16)
-{
-	return high2lowgid(from_kgid_munged(current_user_ns(), current_gid()));
-}
-
-COMPAT_SYSCALL_DEFINE0(s390_getegid16)
-{
-	return high2lowgid(from_kgid_munged(current_user_ns(), current_egid()));
-}
-
 #ifdef CONFIG_SYSVIPC
 COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, compat_ulong_t, second,
 		compat_ulong_t, third, compat_uptr_t, ptr)
 {
 	if (call >> 16)		/* hack for backward compatibility */
 		return -EINVAL;
-	return compat_sys_ipc(call, first, second, third, ptr, third);
+	return compat_ksys_ipc(call, first, second, third, ptr, third);
 }
 #endif
 

arch/s390/kernel/compat_wrapper.c

@@ -1,186 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  Compat system call wrappers.
- *
- *    Copyright IBM Corp. 2014
- */
-
-#include <linux/syscalls.h>
-#include <linux/compat.h>
-#include "entry.h"
-
-#define COMPAT_SYSCALL_WRAP1(name, ...) \
-	COMPAT_SYSCALL_WRAPx(1, _##name, __VA_ARGS__)
-#define COMPAT_SYSCALL_WRAP2(name, ...) \
-	COMPAT_SYSCALL_WRAPx(2, _##name, __VA_ARGS__)
-#define COMPAT_SYSCALL_WRAP3(name, ...) \
-	COMPAT_SYSCALL_WRAPx(3, _##name, __VA_ARGS__)
-#define COMPAT_SYSCALL_WRAP4(name, ...) \
-	COMPAT_SYSCALL_WRAPx(4, _##name, __VA_ARGS__)
-#define COMPAT_SYSCALL_WRAP5(name, ...) \
-	COMPAT_SYSCALL_WRAPx(5, _##name, __VA_ARGS__)
-#define COMPAT_SYSCALL_WRAP6(name, ...) \
-	COMPAT_SYSCALL_WRAPx(6, _##name, __VA_ARGS__)
-
-#define __SC_COMPAT_TYPE(t, a) \
-	__typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a
-
-#define __SC_COMPAT_CAST(t, a)						\
-({									\
-	long __ReS = a;							\
-									\
-	BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) &&		\
-		     !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t));		\
-	if (__TYPE_IS_L(t))						\
-		__ReS = (s32)a;						\
-	if (__TYPE_IS_UL(t))						\
-		__ReS = (u32)a;						\
-	if (__TYPE_IS_PTR(t))						\
-		__ReS = a & 0x7fffffff;					\
-	(t)__ReS;							\
-})
-
-/*
- * The COMPAT_SYSCALL_WRAP macro generates system call wrappers to be used by
- * compat tasks. These wrappers will only be used for system calls where only
- * the system call arguments need sign or zero extension or zeroing of the upper
- * 33 bits of pointers.
- * Note: since the wrapper function will afterwards call a system call which
- * again performs zero and sign extension for all system call arguments with
- * a size of less than eight bytes, these compat wrappers only touch those
- * system call arguments with a size of eight bytes ((unsigned) long and
- * pointers). Zero and sign extension for e.g. int parameters will be done by
- * the regular system call wrappers.
- */
-#define COMPAT_SYSCALL_WRAPx(x, name, ...)					\
-asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));			\
-asmlinkage long notrace compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__));\
-asmlinkage long notrace compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__))	\
-{										\
-	return sys##name(__MAP(x,__SC_COMPAT_CAST,__VA_ARGS__));		\
-}
-
-COMPAT_SYSCALL_WRAP2(creat, const char __user *, pathname, umode_t, mode);
-COMPAT_SYSCALL_WRAP2(link, const char __user *, oldname, const char __user *, newname);
-COMPAT_SYSCALL_WRAP1(unlink, const char __user *, pathname);
-COMPAT_SYSCALL_WRAP1(chdir, const char __user *, filename);
-COMPAT_SYSCALL_WRAP3(mknod, const char __user *, filename, umode_t, mode, unsigned, dev);
-COMPAT_SYSCALL_WRAP2(chmod, const char __user *, filename, umode_t, mode);
-COMPAT_SYSCALL_WRAP1(oldumount, char __user *, name);
-COMPAT_SYSCALL_WRAP2(access, const char __user *, filename, int, mode);
-COMPAT_SYSCALL_WRAP2(rename, const char __user *, oldname, const char __user *, newname);
-COMPAT_SYSCALL_WRAP2(mkdir, const char __user *, pathname, umode_t, mode);
-COMPAT_SYSCALL_WRAP1(rmdir, const char __user *, pathname);
-COMPAT_SYSCALL_WRAP1(pipe, int __user *, fildes);
-COMPAT_SYSCALL_WRAP1(brk, unsigned long, brk);
-COMPAT_SYSCALL_WRAP2(signal, int, sig, __sighandler_t, handler);
-COMPAT_SYSCALL_WRAP1(acct, const char __user *, name);
-COMPAT_SYSCALL_WRAP2(umount, char __user *, name, int, flags);
-COMPAT_SYSCALL_WRAP1(chroot, const char __user *, filename);
-COMPAT_SYSCALL_WRAP3(sigsuspend, int, unused1, int, unused2, old_sigset_t, mask);
-COMPAT_SYSCALL_WRAP2(sethostname, char __user *, name, int, len);
-COMPAT_SYSCALL_WRAP2(symlink, const char __user *, old, const char __user *, new);
-COMPAT_SYSCALL_WRAP3(readlink, const char __user *, path, char __user *, buf, int, bufsiz);
-COMPAT_SYSCALL_WRAP1(uselib, const char __user *, library);
-COMPAT_SYSCALL_WRAP2(swapon, const char __user *, specialfile, int, swap_flags);
-COMPAT_SYSCALL_WRAP4(reboot, int, magic1, int, magic2, unsigned int, cmd, void __user *, arg);
-COMPAT_SYSCALL_WRAP2(munmap, unsigned long, addr, size_t, len);
-COMPAT_SYSCALL_WRAP3(syslog, int, type, char __user *, buf, int, len);
-COMPAT_SYSCALL_WRAP1(swapoff, const char __user *, specialfile);
-COMPAT_SYSCALL_WRAP2(setdomainname, char __user *, name, int, len);
-COMPAT_SYSCALL_WRAP1(newuname, struct new_utsname __user *, name);
-COMPAT_SYSCALL_WRAP3(mprotect, unsigned long, start, size_t, len, unsigned long, prot);
-COMPAT_SYSCALL_WRAP3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs);
-COMPAT_SYSCALL_WRAP2(delete_module, const char __user *, name_user, unsigned int, flags);
-COMPAT_SYSCALL_WRAP4(quotactl, unsigned int, cmd, const char __user *, special, qid_t, id, void __user *, addr);
-COMPAT_SYSCALL_WRAP2(bdflush, int, func, long, data);
-COMPAT_SYSCALL_WRAP3(sysfs, int, option, unsigned long, arg1, unsigned long, arg2);
-COMPAT_SYSCALL_WRAP5(llseek, unsigned int, fd, unsigned long, high, unsigned long, low, loff_t __user *, result, unsigned int, whence);
-COMPAT_SYSCALL_WRAP3(msync, unsigned long, start, size_t, len, int, flags);
-COMPAT_SYSCALL_WRAP2(mlock, unsigned long, start, size_t, len);
-COMPAT_SYSCALL_WRAP2(munlock, unsigned long, start, size_t, len);
-COMPAT_SYSCALL_WRAP2(sched_setparam, pid_t, pid, struct sched_param __user *, param);
-COMPAT_SYSCALL_WRAP2(sched_getparam, pid_t, pid, struct sched_param __user *, param);
-COMPAT_SYSCALL_WRAP3(sched_setscheduler, pid_t, pid, int, policy, struct sched_param __user *, param);
-COMPAT_SYSCALL_WRAP5(mremap, unsigned long, addr, unsigned long, old_len, unsigned long, new_len, unsigned long, flags, unsigned long, new_addr);
-COMPAT_SYSCALL_WRAP3(poll, struct pollfd __user *, ufds, unsigned int, nfds, int, timeout);
-COMPAT_SYSCALL_WRAP5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, unsigned long, arg4, unsigned long, arg5);
-COMPAT_SYSCALL_WRAP2(getcwd, char __user *, buf, unsigned long, size);
-COMPAT_SYSCALL_WRAP2(capget, cap_user_header_t, header, cap_user_data_t, dataptr);
-COMPAT_SYSCALL_WRAP2(capset, cap_user_header_t, header, const cap_user_data_t, data);
-COMPAT_SYSCALL_WRAP3(lchown, const char __user *, filename, uid_t, user, gid_t, group);
-COMPAT_SYSCALL_WRAP2(getgroups, int, gidsetsize, gid_t __user *, grouplist);
-COMPAT_SYSCALL_WRAP2(setgroups, int, gidsetsize, gid_t __user *, grouplist);
-COMPAT_SYSCALL_WRAP3(getresuid, uid_t __user *, ruid, uid_t __user *, euid, uid_t __user *, suid);
-COMPAT_SYSCALL_WRAP3(getresgid, gid_t __user *, rgid, gid_t __user *, egid, gid_t __user *, sgid);
-COMPAT_SYSCALL_WRAP3(chown, const char __user *, filename, uid_t, user, gid_t, group);
-COMPAT_SYSCALL_WRAP2(pivot_root, const char __user *, new_root, const char __user *, put_old);
-COMPAT_SYSCALL_WRAP3(mincore, unsigned long, start, size_t, len, unsigned char __user *, vec);
-COMPAT_SYSCALL_WRAP3(madvise, unsigned long, start, size_t, len, int, behavior);
-COMPAT_SYSCALL_WRAP5(setxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
-COMPAT_SYSCALL_WRAP5(lsetxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
-COMPAT_SYSCALL_WRAP5(fsetxattr, int, fd, const char __user *, name, const void __user *, value, size_t, size, int, flags);
-COMPAT_SYSCALL_WRAP3(getdents64, unsigned int, fd, struct linux_dirent64 __user *, dirent, unsigned int, count);
-COMPAT_SYSCALL_WRAP4(getxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
-COMPAT_SYSCALL_WRAP4(lgetxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
-COMPAT_SYSCALL_WRAP4(fgetxattr, int, fd, const char __user *, name, void __user *, value, size_t, size);
-COMPAT_SYSCALL_WRAP3(listxattr, const char __user *, path, char __user *, list, size_t, size);
-COMPAT_SYSCALL_WRAP3(llistxattr, const char __user *, path, char __user *, list, size_t, size);
-COMPAT_SYSCALL_WRAP3(flistxattr, int, fd, char __user *, list, size_t, size);
-COMPAT_SYSCALL_WRAP2(removexattr, const char __user *, path, const char __user *, name);
-COMPAT_SYSCALL_WRAP2(lremovexattr, const char __user *, path, const char __user *, name);
-COMPAT_SYSCALL_WRAP2(fremovexattr, int, fd, const char __user *, name);
-COMPAT_SYSCALL_WRAP1(set_tid_address, int __user *, tidptr);
-COMPAT_SYSCALL_WRAP4(epoll_ctl, int, epfd, int, op, int, fd, struct epoll_event __user *, event);
-COMPAT_SYSCALL_WRAP4(epoll_wait, int, epfd, struct epoll_event __user *, events, int, maxevents, int, timeout);
-COMPAT_SYSCALL_WRAP1(io_destroy, aio_context_t, ctx);
-COMPAT_SYSCALL_WRAP3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb, struct io_event __user *, result);
-COMPAT_SYSCALL_WRAP1(mq_unlink, const char __user *, name);
-COMPAT_SYSCALL_WRAP5(add_key, const char __user *, tp, const char __user *, dsc, const void __user *, pld, size_t, len, key_serial_t, id);
-COMPAT_SYSCALL_WRAP4(request_key, const char __user *, tp, const char __user *, dsc, const char __user *, info, key_serial_t, id);
-COMPAT_SYSCALL_WRAP5(remap_file_pages, unsigned long, start, unsigned long, size, unsigned long, prot, unsigned long, pgoff, unsigned long, flags);
-COMPAT_SYSCALL_WRAP3(inotify_add_watch, int, fd, const char __user *, path, u32, mask);
-COMPAT_SYSCALL_WRAP3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode);
-COMPAT_SYSCALL_WRAP4(mknodat, int, dfd, const char __user *, filename, umode_t, mode, unsigned, dev);
-COMPAT_SYSCALL_WRAP5(fchownat, int, dfd, const char __user *, filename, uid_t, user, gid_t, group, int, flag);
-COMPAT_SYSCALL_WRAP3(unlinkat, int, dfd, const char __user *, pathname, int, flag);
-COMPAT_SYSCALL_WRAP4(renameat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname);
-COMPAT_SYSCALL_WRAP5(linkat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, int, flags);
-COMPAT_SYSCALL_WRAP3(symlinkat, const char __user *, oldname, int, newdfd, const char __user *, newname);
-COMPAT_SYSCALL_WRAP4(readlinkat, int, dfd, const char __user *, path, char __user *, buf, int, bufsiz);
-COMPAT_SYSCALL_WRAP3(fchmodat, int, dfd, const char __user *, filename, umode_t, mode);
-COMPAT_SYSCALL_WRAP3(faccessat, int, dfd, const char __user *, filename, int, mode);
-COMPAT_SYSCALL_WRAP1(unshare, unsigned long, unshare_flags);
-COMPAT_SYSCALL_WRAP6(splice, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags);
-COMPAT_SYSCALL_WRAP4(tee, int, fdin, int, fdout, size_t, len, unsigned int, flags);
-COMPAT_SYSCALL_WRAP3(getcpu, unsigned __user *, cpu, unsigned __user *, node, struct getcpu_cache __user *, cache);
-COMPAT_SYSCALL_WRAP2(pipe2, int __user *, fildes, int, flags);
-COMPAT_SYSCALL_WRAP5(perf_event_open, struct perf_event_attr __user *, attr_uptr, pid_t, pid, int, cpu, int, group_fd, unsigned long, flags);
-COMPAT_SYSCALL_WRAP5(clone, unsigned long, newsp, unsigned long, clone_flags, int __user *, parent_tidptr, int __user *, child_tidptr, unsigned long, tls);
-COMPAT_SYSCALL_WRAP4(prlimit64, pid_t, pid, unsigned int, resource, const struct rlimit64 __user *, new_rlim, struct rlimit64 __user *, old_rlim);
-COMPAT_SYSCALL_WRAP5(name_to_handle_at, int, dfd, const char __user *, name, struct file_handle __user *, handle, int __user *, mnt_id, int, flag);
-COMPAT_SYSCALL_WRAP5(kcmp, pid_t, pid1, pid_t, pid2, int, type, unsigned long, idx1, unsigned long, idx2);
-COMPAT_SYSCALL_WRAP3(finit_module, int, fd, const char __user *, uargs, int, flags);
-COMPAT_SYSCALL_WRAP3(sched_setattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, flags);
-COMPAT_SYSCALL_WRAP4(sched_getattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, size, unsigned int, flags);
-COMPAT_SYSCALL_WRAP5(renameat2, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, unsigned int, flags);
-COMPAT_SYSCALL_WRAP3(seccomp, unsigned int, op, unsigned int, flags, void __user *, uargs)
-COMPAT_SYSCALL_WRAP3(getrandom, char __user *, buf, size_t, count, unsigned int, flags)
-COMPAT_SYSCALL_WRAP2(memfd_create, const char __user *, uname, unsigned int, flags)
-COMPAT_SYSCALL_WRAP3(bpf, int, cmd, union bpf_attr *, attr, unsigned int, size);
-COMPAT_SYSCALL_WRAP3(s390_pci_mmio_write, const unsigned long, mmio_addr, const void __user *, user_buffer, const size_t, length);
-COMPAT_SYSCALL_WRAP3(s390_pci_mmio_read, const unsigned long, mmio_addr, void __user *, user_buffer, const size_t, length);
-COMPAT_SYSCALL_WRAP4(socketpair, int, family, int, type, int, protocol, int __user *, usockvec);
-COMPAT_SYSCALL_WRAP3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen);
-COMPAT_SYSCALL_WRAP3(connect, int, fd, struct sockaddr __user *, uservaddr, int, addrlen);
-COMPAT_SYSCALL_WRAP4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, int __user *, upeer_addrlen, int, flags);
-COMPAT_SYSCALL_WRAP3(getsockname, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len);
-COMPAT_SYSCALL_WRAP3(getpeername, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len);
-COMPAT_SYSCALL_WRAP6(sendto, int, fd, void __user *, buff, size_t, len, unsigned int, flags, struct sockaddr __user *, addr, int, addr_len);
-COMPAT_SYSCALL_WRAP3(mlock2, unsigned long, start, size_t, len, int, flags);
-COMPAT_SYSCALL_WRAP6(copy_file_range, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags);
-COMPAT_SYSCALL_WRAP2(s390_guarded_storage, int, command, struct gs_cb *, gs_cb);
-COMPAT_SYSCALL_WRAP5(statx, int, dfd, const char __user *, path, unsigned, flags, unsigned, mask, struct statx __user *, buffer);
-COMPAT_SYSCALL_WRAP4(s390_sthyi, unsigned long, code, void __user *, info, u64 __user *, rc, unsigned long, flags);
-COMPAT_SYSCALL_WRAP5(kexec_file_load, int, kernel_fd, int, initrd_fd, unsigned long, cmdline_len, const char __user *, cmdline_ptr, unsigned long, flags)
-COMPAT_SYSCALL_WRAP4(rseq, struct rseq __user *, rseq, u32, rseq_len, int, flags, u32, sig)

arch/s390/kernel/debug.c

@@ -1056,12 +1056,6 @@ int debug_register_view(debug_info_t *id, struct debug_view *view)
 		mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
 	pde = debugfs_create_file(view->name, mode, id->debugfs_root_entry,
 				  id, &debug_file_ops);
-	if (!pde) {
-		pr_err("Registering view %s/%s failed due to out of "
-		       "memory\n", id->name, view->name);
-		rc = -1;
-		goto out;
-	}
 	spin_lock_irqsave(&id->lock, flags);
 	for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
 		if (!id->views[i])

arch/s390/kernel/diag.c

@@ -45,6 +45,7 @@ static const struct diag_desc diag_map[NR_DIAG_STAT] = {
 	[DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
 	[DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
 	[DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
+	[DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" },
 	[DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
 };
 

arch/s390/kernel/early.c

@@ -164,8 +164,6 @@ static noinline __init void setup_lowcore_early(void)
 
 static noinline __init void setup_facility_list(void)
 {
-	stfle(S390_lowcore.stfle_fac_list,
-	      ARRAY_SIZE(S390_lowcore.stfle_fac_list));
 	memcpy(S390_lowcore.alt_stfle_fac_list,
 	       S390_lowcore.stfle_fac_list,
 	       sizeof(S390_lowcore.alt_stfle_fac_list));

arch/s390/kernel/entry.S

@@ -1512,7 +1512,7 @@ cleanup_critical:
 	.quad   .Lsie_skip - .Lsie_entry
 #endif
 	.section .rodata, "a"
-#define SYSCALL(esame,emu)	.long esame
+#define SYSCALL(esame,emu)	.long __s390x_ ## esame
 	.globl	sys_call_table
 sys_call_table:
 #include "asm/syscall_table.h"
@@ -1520,7 +1520,7 @@ sys_call_table:
 
 #ifdef CONFIG_COMPAT
 
-#define SYSCALL(esame,emu)	.long emu
+#define SYSCALL(esame,emu)	.long __s390_ ## emu
 	.globl	sys_call_table_emu
 sys_call_table_emu:
 #include "asm/syscall_table.h"

arch/s390/kernel/head64.S

@@ -27,8 +27,6 @@ ENTRY(startup_continue)
 	mvc	0(16,%r1),__LC_BOOT_CLOCK
 	larl	%r13,.LPG1		# get base
 	lctlg	%c0,%c15,.Lctl-.LPG1(%r13)	# load control registers
-	lg	%r12,.Lparmaddr-.LPG1(%r13)	# pointer to parameter area
-					# move IPL device to lowcore
 	larl	%r0,boot_vdso_data
 	stg	%r0,__LC_VDSO_PER_CPU
 #

arch/s390/kernel/kdebugfs.c

@@ -9,8 +9,6 @@ EXPORT_SYMBOL(arch_debugfs_dir);
 static int __init arch_kdebugfs_init(void)
 {
 	arch_debugfs_dir = debugfs_create_dir("s390", NULL);
-	if (IS_ERR(arch_debugfs_dir))
-		arch_debugfs_dir = NULL;
 	return 0;
 }
 postcore_initcall(arch_kdebugfs_init);

arch/s390/kernel/perf_cpum_cf.c

@@ -10,73 +10,11 @@
 
 #include <linux/kernel.h>
 #include <linux/kernel_stat.h>
-#include <linux/perf_event.h>
 #include <linux/percpu.h>
 #include <linux/notifier.h>
 #include <linux/init.h>
 #include <linux/export.h>
-#include <asm/ctl_reg.h>
+#include <asm/cpu_mcf.h>
-#include <asm/irq.h>
-#include <asm/cpu_mf.h>
-
-enum cpumf_ctr_set {
-	CPUMF_CTR_SET_BASIC   = 0,    /* Basic Counter Set */
-	CPUMF_CTR_SET_USER    = 1,    /* Problem-State Counter Set */
-	CPUMF_CTR_SET_CRYPTO  = 2,    /* Crypto-Activity Counter Set */
-	CPUMF_CTR_SET_EXT     = 3,    /* Extended Counter Set */
-	CPUMF_CTR_SET_MT_DIAG = 4,    /* MT-diagnostic Counter Set */
-
-	/* Maximum number of counter sets */
-	CPUMF_CTR_SET_MAX,
-};
-
-#define CPUMF_LCCTL_ENABLE_SHIFT    16
-#define CPUMF_LCCTL_ACTCTL_SHIFT     0
-static const u64 cpumf_state_ctl[CPUMF_CTR_SET_MAX] = {
-	[CPUMF_CTR_SET_BASIC]	= 0x02,
-	[CPUMF_CTR_SET_USER]	= 0x04,
-	[CPUMF_CTR_SET_CRYPTO]	= 0x08,
-	[CPUMF_CTR_SET_EXT]	= 0x01,
-	[CPUMF_CTR_SET_MT_DIAG] = 0x20,
-};
-
-static void ctr_set_enable(u64 *state, int ctr_set)
-{
-	*state |= cpumf_state_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT;
-}
-static void ctr_set_disable(u64 *state, int ctr_set)
-{
-	*state &= ~(cpumf_state_ctl[ctr_set] << CPUMF_LCCTL_ENABLE_SHIFT);
-}
-static void ctr_set_start(u64 *state, int ctr_set)
-{
-	*state |= cpumf_state_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT;
-}
-static void ctr_set_stop(u64 *state, int ctr_set)
-{
-	*state &= ~(cpumf_state_ctl[ctr_set] << CPUMF_LCCTL_ACTCTL_SHIFT);
-}
-
-/* Local CPUMF event structure */
-struct cpu_hw_events {
-	struct cpumf_ctr_info	info;
-	atomic_t		ctr_set[CPUMF_CTR_SET_MAX];
-	u64			state, tx_state;
-	unsigned int		flags;
-	unsigned int		txn_flags;
-};
-static DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events) = {
-	.ctr_set = {
-		[CPUMF_CTR_SET_BASIC]	= ATOMIC_INIT(0),
-		[CPUMF_CTR_SET_USER]	= ATOMIC_INIT(0),
-		[CPUMF_CTR_SET_CRYPTO]	= ATOMIC_INIT(0),
-		[CPUMF_CTR_SET_EXT]	= ATOMIC_INIT(0),
-		[CPUMF_CTR_SET_MT_DIAG] = ATOMIC_INIT(0),
-	},
-	.state = 0,
-	.flags = 0,
-	.txn_flags = 0,
-};
 
 static enum cpumf_ctr_set get_counter_set(u64 event)
 {
@@ -98,11 +36,11 @@ static enum cpumf_ctr_set get_counter_set(u64 event)
 
 static int validate_ctr_version(const struct hw_perf_event *hwc)
 {
-	struct cpu_hw_events *cpuhw;
+	struct cpu_cf_events *cpuhw;
 	int err = 0;
 	u16 mtdiag_ctl;
 
-	cpuhw = &get_cpu_var(cpu_hw_events);
+	cpuhw = &get_cpu_var(cpu_cf_events);
 
 	/* check required version for counter sets */
 	switch (hwc->config_base) {
@@ -135,7 +73,7 @@ static int validate_ctr_version(const struct hw_perf_event *hwc)
 		 * Thus, the counters can only be used if SMT is on and the
 		 * counter set is enabled and active.
 		 */
-		mtdiag_ctl = cpumf_state_ctl[CPUMF_CTR_SET_MT_DIAG];
+		mtdiag_ctl = cpumf_ctr_ctl[CPUMF_CTR_SET_MT_DIAG];
 		if (!((cpuhw->info.auth_ctl & mtdiag_ctl) &&
 		      (cpuhw->info.enable_ctl & mtdiag_ctl) &&
 		      (cpuhw->info.act_ctl & mtdiag_ctl)))
@@ -143,28 +81,28 @@ static int validate_ctr_version(const struct hw_perf_event *hwc)
 		break;
 	}
 
-	put_cpu_var(cpu_hw_events);
+	put_cpu_var(cpu_cf_events);
 	return err;
 }
 
 static int validate_ctr_auth(const struct hw_perf_event *hwc)
 {
-	struct cpu_hw_events *cpuhw;
+	struct cpu_cf_events *cpuhw;
 	u64 ctrs_state;
 	int err = 0;
 
-	cpuhw = &get_cpu_var(cpu_hw_events);
+	cpuhw = &get_cpu_var(cpu_cf_events);
 
 	/* Check authorization for cpu counter sets.
 	 * If the particular CPU counter set is not authorized,
 	 * return with -ENOENT in order to fall back to other
 	 * PMUs that might suffice the event request.
 	 */
-	ctrs_state = cpumf_state_ctl[hwc->config_base];
+	ctrs_state = cpumf_ctr_ctl[hwc->config_base];
 	if (!(ctrs_state & cpuhw->info.auth_ctl))
 		err = -ENOENT;
 
-	put_cpu_var(cpu_hw_events);
+	put_cpu_var(cpu_cf_events);
 	return err;
 }
 
@@ -175,7 +113,7 @@ static int validate_ctr_auth(const struct hw_perf_event *hwc)
  */
 static void cpumf_pmu_enable(struct pmu *pmu)
 {
-	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
 	int err;
 
 	if (cpuhw->flags & PMU_F_ENABLED)
@@ -198,7 +136,7 @@ static void cpumf_pmu_enable(struct pmu *pmu)
  */
 static void cpumf_pmu_disable(struct pmu *pmu)
 {
-	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
 	int err;
 	u64 inactive;
 
@@ -222,86 +160,13 @@ static atomic_t num_events = ATOMIC_INIT(0);
 /* Used to avoid races in calling reserve/release_cpumf_hardware */
 static DEFINE_MUTEX(pmc_reserve_mutex);
 
-/* CPU-measurement alerts for the counter facility */
-static void cpumf_measurement_alert(struct ext_code ext_code,
-				    unsigned int alert, unsigned long unused)
-{
-	struct cpu_hw_events *cpuhw;
-
-	if (!(alert & CPU_MF_INT_CF_MASK))
-		return;
-
-	inc_irq_stat(IRQEXT_CMC);
-	cpuhw = this_cpu_ptr(&cpu_hw_events);
-
-	/* Measurement alerts are shared and might happen when the PMU
-	 * is not reserved.  Ignore these alerts in this case. */
-	if (!(cpuhw->flags & PMU_F_RESERVED))
-		return;
-
-	/* counter authorization change alert */
-	if (alert & CPU_MF_INT_CF_CACA)
-		qctri(&cpuhw->info);
-
-	/* loss of counter data alert */
-	if (alert & CPU_MF_INT_CF_LCDA)
-		pr_err("CPU[%i] Counter data was lost\n", smp_processor_id());
-
-	/* loss of MT counter data alert */
-	if (alert & CPU_MF_INT_CF_MTDA)
-		pr_warn("CPU[%i] MT counter data was lost\n",
-			smp_processor_id());
-}
-
-#define PMC_INIT      0
-#define PMC_RELEASE   1
-static void setup_pmc_cpu(void *flags)
-{
-	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
-
-	switch (*((int *) flags)) {
-	case PMC_INIT:
-		memset(&cpuhw->info, 0, sizeof(cpuhw->info));
-		qctri(&cpuhw->info);
-		cpuhw->flags |= PMU_F_RESERVED;
-		break;
-
-	case PMC_RELEASE:
-		cpuhw->flags &= ~PMU_F_RESERVED;
-		break;
-	}
-
-	/* Disable CPU counter sets */
-	lcctl(0);
-}
-
-/* Initialize the CPU-measurement facility */
-static int reserve_pmc_hardware(void)
-{
-	int flags = PMC_INIT;
-
-	on_each_cpu(setup_pmc_cpu, &flags, 1);
-	irq_subclass_register(IRQ_SUBCLASS_MEASUREMENT_ALERT);
-
-	return 0;
-}
-
-/* Release the CPU-measurement facility */
-static void release_pmc_hardware(void)
-{
-	int flags = PMC_RELEASE;
-
-	on_each_cpu(setup_pmc_cpu, &flags, 1);
-	irq_subclass_unregister(IRQ_SUBCLASS_MEASUREMENT_ALERT);
-}
-
 /* Release the PMU if event is the last perf event */
 static void hw_perf_event_destroy(struct perf_event *event)
 {
 	if (!atomic_add_unless(&num_events, -1, 1)) {
 		mutex_lock(&pmc_reserve_mutex);
 		if (atomic_dec_return(&num_events) == 0)
-			release_pmc_hardware();
+			__kernel_cpumcf_end();
 		mutex_unlock(&pmc_reserve_mutex);
 	}
 }
@@ -332,7 +197,7 @@ static int __hw_perf_event_init(struct perf_event *event)
 	struct perf_event_attr *attr = &event->attr;
 	struct hw_perf_event *hwc = &event->hw;
 	enum cpumf_ctr_set set;
-	int err;
+	int err = 0;
 	u64 ev;
 
 	switch (attr->type) {
@@ -402,12 +267,14 @@ static int __hw_perf_event_init(struct perf_event *event)
 	/* Initialize for using the CPU-measurement counter facility */
 	if (!atomic_inc_not_zero(&num_events)) {
 		mutex_lock(&pmc_reserve_mutex);
-		if (atomic_read(&num_events) == 0 && reserve_pmc_hardware())
+		if (atomic_read(&num_events) == 0 && __kernel_cpumcf_begin())
 			err = -EBUSY;
 		else
 			atomic_inc(&num_events);
 		mutex_unlock(&pmc_reserve_mutex);
 	}
+	if (err)
+		return err;
 	event->destroy = hw_perf_event_destroy;
 
 	/* Finally, validate version and authorization of the counter set */
@@ -488,7 +355,7 @@ static void cpumf_pmu_read(struct perf_event *event)
 
 static void cpumf_pmu_start(struct perf_event *event, int flags)
 {
-	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
 	struct hw_perf_event *hwc = &event->hw;
 
 	if (WARN_ON_ONCE(!(hwc->state & PERF_HES_STOPPED)))
@@ -519,7 +386,7 @@ static void cpumf_pmu_start(struct perf_event *event, int flags)
 
 static void cpumf_pmu_stop(struct perf_event *event, int flags)
 {
-	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
 	struct hw_perf_event *hwc = &event->hw;
 
 	if (!(hwc->state & PERF_HES_STOPPED)) {
@@ -540,7 +407,7 @@ static void cpumf_pmu_stop(struct perf_event *event, int flags)
 
 static int cpumf_pmu_add(struct perf_event *event, int flags)
 {
-	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
 
 	/* Check authorization for the counter set to which this
 	 * counter belongs.
@@ -564,7 +431,7 @@ static int cpumf_pmu_add(struct perf_event *event, int flags)
 
 static void cpumf_pmu_del(struct perf_event *event, int flags)
 {
-	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
 
 	cpumf_pmu_stop(event, PERF_EF_UPDATE);
 
@@ -592,7 +459,7 @@ static void cpumf_pmu_del(struct perf_event *event, int flags)
  */
 static void cpumf_pmu_start_txn(struct pmu *pmu, unsigned int txn_flags)
 {
-	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
 
 	WARN_ON_ONCE(cpuhw->txn_flags);		/* txn already in flight */
 
@@ -612,7 +479,7 @@ static void cpumf_pmu_start_txn(struct pmu *pmu, unsigned int txn_flags)
 static void cpumf_pmu_cancel_txn(struct pmu *pmu)
 {
 	unsigned int txn_flags;
-	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
 
 	WARN_ON_ONCE(!cpuhw->txn_flags);	/* no txn in flight */
 
@@ -633,7 +500,7 @@ static void cpumf_pmu_cancel_txn(struct pmu *pmu)
  */
 static int cpumf_pmu_commit_txn(struct pmu *pmu)
 {
-	struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events);
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
 	u64 state;
 
 	WARN_ON_ONCE(!cpuhw->txn_flags);	/* no txn in flight */
@@ -671,54 +538,17 @@ static struct pmu cpumf_pmu = {
 	.cancel_txn   = cpumf_pmu_cancel_txn,
 };
 
-static int cpumf_pmf_setup(unsigned int cpu, int flags)
-{
-	local_irq_disable();
-	setup_pmc_cpu(&flags);
-	local_irq_enable();
-	return 0;
-}
-
-static int s390_pmu_online_cpu(unsigned int cpu)
-{
-	return cpumf_pmf_setup(cpu, PMC_INIT);
-}
-
-static int s390_pmu_offline_cpu(unsigned int cpu)
-{
-	return cpumf_pmf_setup(cpu, PMC_RELEASE);
-}
-
 static int __init cpumf_pmu_init(void)
 {
 	int rc;
 
-	if (!cpum_cf_avail())
+	if (!kernel_cpumcf_avail())
 		return -ENODEV;
 
-	/* clear bit 15 of cr0 to unauthorize problem-state to
-	 * extract measurement counters */
-	ctl_clear_bit(0, 48);
-
-	/* register handler for measurement-alert interruptions */
-	rc = register_external_irq(EXT_IRQ_MEASURE_ALERT,
-				   cpumf_measurement_alert);
-	if (rc) {
-		pr_err("Registering for CPU-measurement alerts "
-		       "failed with rc=%i\n", rc);
-		return rc;
-	}
-
 	cpumf_pmu.attr_groups = cpumf_cf_event_group();
 	rc = perf_pmu_register(&cpumf_pmu, "cpum_cf", PERF_TYPE_RAW);
-	if (rc) {
+	if (rc)
 		pr_err("Registering the cpum_cf PMU failed with rc=%i\n", rc);
-		unregister_external_irq(EXT_IRQ_MEASURE_ALERT,
+	return rc;
-					cpumf_measurement_alert);
-		return rc;
-	}
-	return cpuhp_setup_state(CPUHP_AP_PERF_S390_CF_ONLINE,
-				 "perf/s390/cf:online",
-				 s390_pmu_online_cpu, s390_pmu_offline_cpu);
 }
-early_initcall(cpumf_pmu_init);
+subsys_initcall(cpumf_pmu_init);

arch/s390/kernel/perf_cpum_cf_common.c

@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CPU-Measurement Counter Facility Support - Common Layer
+ *
+ *  Copyright IBM Corp. 2019
+ *  Author(s): Hendrik Brueckner <brueckner@linux.ibm.com>
+ */
+#define KMSG_COMPONENT	"cpum_cf_common"
+#define pr_fmt(fmt)	KMSG_COMPONENT ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/percpu.h>
+#include <linux/notifier.h>
+#include <linux/init.h>
+#include <linux/export.h>
+#include <asm/ctl_reg.h>
+#include <asm/irq.h>
+#include <asm/cpu_mcf.h>
+
+/* Per-CPU event structure for the counter facility */
+DEFINE_PER_CPU(struct cpu_cf_events, cpu_cf_events) = {
+	.ctr_set = {
+		[CPUMF_CTR_SET_BASIC]	= ATOMIC_INIT(0),
+		[CPUMF_CTR_SET_USER]	= ATOMIC_INIT(0),
+		[CPUMF_CTR_SET_CRYPTO]	= ATOMIC_INIT(0),
+		[CPUMF_CTR_SET_EXT]	= ATOMIC_INIT(0),
+		[CPUMF_CTR_SET_MT_DIAG] = ATOMIC_INIT(0),
+	},
+	.alert = ATOMIC64_INIT(0),
+	.state = 0,
+	.flags = 0,
+	.txn_flags = 0,
+};
+/* Indicator whether the CPU-Measurement Counter Facility Support is ready */
+static bool cpum_cf_initalized;
+
+/* CPU-measurement alerts for the counter facility */
+static void cpumf_measurement_alert(struct ext_code ext_code,
+				    unsigned int alert, unsigned long unused)
+{
+	struct cpu_cf_events *cpuhw;
+
+	if (!(alert & CPU_MF_INT_CF_MASK))
+		return;
+
+	inc_irq_stat(IRQEXT_CMC);
+	cpuhw = this_cpu_ptr(&cpu_cf_events);
+
+	/* Measurement alerts are shared and might happen when the PMU
+	 * is not reserved.  Ignore these alerts in this case. */
+	if (!(cpuhw->flags & PMU_F_RESERVED))
+		return;
+
+	/* counter authorization change alert */
+	if (alert & CPU_MF_INT_CF_CACA)
+		qctri(&cpuhw->info);
+
+	/* loss of counter data alert */
+	if (alert & CPU_MF_INT_CF_LCDA)
+		pr_err("CPU[%i] Counter data was lost\n", smp_processor_id());
+
+	/* loss of MT counter data alert */
+	if (alert & CPU_MF_INT_CF_MTDA)
+		pr_warn("CPU[%i] MT counter data was lost\n",
+			smp_processor_id());
+
+	/* store alert for special handling by in-kernel users */
+	atomic64_or(alert, &cpuhw->alert);
+}
+
+#define PMC_INIT      0
+#define PMC_RELEASE   1
+static void cpum_cf_setup_cpu(void *flags)
+{
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
+
+	switch (*((int *) flags)) {
+	case PMC_INIT:
+		memset(&cpuhw->info, 0, sizeof(cpuhw->info));
+		qctri(&cpuhw->info);
+		cpuhw->flags |= PMU_F_RESERVED;
+		break;
+
+	case PMC_RELEASE:
+		cpuhw->flags &= ~PMU_F_RESERVED;
+		break;
+	}
+
+	/* Disable CPU counter sets */
+	lcctl(0);
+}
+
+bool kernel_cpumcf_avail(void)
+{
+	return cpum_cf_initalized;
+}
+EXPORT_SYMBOL(kernel_cpumcf_avail);
+
+
+/* Reserve/release functions for sharing perf hardware */
+static DEFINE_SPINLOCK(cpumcf_owner_lock);
+static void *cpumcf_owner;
+
+/* Initialize the CPU-measurement counter facility */
+int __kernel_cpumcf_begin(void)
+{
+	int flags = PMC_INIT;
+	int err = 0;
+
+	spin_lock(&cpumcf_owner_lock);
+	if (cpumcf_owner)
+		err = -EBUSY;
+	else
+		cpumcf_owner = __builtin_return_address(0);
+	spin_unlock(&cpumcf_owner_lock);
+	if (err)
+		return err;
+
+	on_each_cpu(cpum_cf_setup_cpu, &flags, 1);
+	irq_subclass_register(IRQ_SUBCLASS_MEASUREMENT_ALERT);
+
+	return 0;
+}
+EXPORT_SYMBOL(__kernel_cpumcf_begin);
+
+/* Obtain the CPU-measurement alerts for the counter facility */
+unsigned long kernel_cpumcf_alert(int clear)
+{
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
+	unsigned long alert;
+
+	alert = atomic64_read(&cpuhw->alert);
+	if (clear)
+		atomic64_set(&cpuhw->alert, 0);
+
+	return alert;
+}
+EXPORT_SYMBOL(kernel_cpumcf_alert);
+
+/* Release the CPU-measurement counter facility */
+void __kernel_cpumcf_end(void)
+{
+	int flags = PMC_RELEASE;
+
+	on_each_cpu(cpum_cf_setup_cpu, &flags, 1);
+	irq_subclass_unregister(IRQ_SUBCLASS_MEASUREMENT_ALERT);
+
+	spin_lock(&cpumcf_owner_lock);
+	cpumcf_owner = NULL;
+	spin_unlock(&cpumcf_owner_lock);
+}
+EXPORT_SYMBOL(__kernel_cpumcf_end);
+
+static int cpum_cf_setup(unsigned int cpu, int flags)
+{
+	local_irq_disable();
+	cpum_cf_setup_cpu(&flags);
+	local_irq_enable();
+	return 0;
+}
+
+static int cpum_cf_online_cpu(unsigned int cpu)
+{
+	return cpum_cf_setup(cpu, PMC_INIT);
+}
+
+static int cpum_cf_offline_cpu(unsigned int cpu)
+{
+	return cpum_cf_setup(cpu, PMC_RELEASE);
+}
+
+static int __init cpum_cf_init(void)
+{
+	int rc;
+
+	if (!cpum_cf_avail())
+		return -ENODEV;
+
+	/* clear bit 15 of cr0 to unauthorize problem-state to
+	 * extract measurement counters */
+	ctl_clear_bit(0, 48);
+
+	/* register handler for measurement-alert interruptions */
+	rc = register_external_irq(EXT_IRQ_MEASURE_ALERT,
+				   cpumf_measurement_alert);
+	if (rc) {
+		pr_err("Registering for CPU-measurement alerts "
+		       "failed with rc=%i\n", rc);
+		return rc;
+	}
+
+	rc = cpuhp_setup_state(CPUHP_AP_PERF_S390_CF_ONLINE,
+				"perf/s390/cf:online",
+				cpum_cf_online_cpu, cpum_cf_offline_cpu);
+	if (!rc)
+		cpum_cf_initalized = true;
+
+	return rc;
+}
+early_initcall(cpum_cf_init);

arch/s390/kernel/perf_cpum_cf_diag.c

@@ -0,0 +1,693 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Performance event support for s390x - CPU-measurement Counter Sets
+ *
+ *  Copyright IBM Corp. 2019
+ *  Author(s): Hendrik Brueckner <brueckner@linux.ibm.com>
+ *	       Thomas Richer <tmricht@linux.ibm.com>
+ */
+#define KMSG_COMPONENT	"cpum_cf_diag"
+#define pr_fmt(fmt)	KMSG_COMPONENT ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/percpu.h>
+#include <linux/notifier.h>
+#include <linux/init.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/processor.h>
+
+#include <asm/ctl_reg.h>
+#include <asm/irq.h>
+#include <asm/cpu_mcf.h>
+#include <asm/timex.h>
+#include <asm/debug.h>
+
+#define	CF_DIAG_CTRSET_DEF		0xfeef	/* Counter set header mark */
+
+static unsigned int cf_diag_cpu_speed;
+static debug_info_t *cf_diag_dbg;
+
+struct cf_diag_csd {		/* Counter set data per CPU */
+	size_t used;			/* Bytes used in data/start */
+	unsigned char start[PAGE_SIZE];	/* Counter set at event start */
+	unsigned char data[PAGE_SIZE];	/* Counter set at event delete */
+};
+DEFINE_PER_CPU(struct cf_diag_csd, cf_diag_csd);
+
+/* Counter sets are stored as data stream in a page sized memory buffer and
+ * exported to user space via raw data attached to the event sample data.
+ * Each counter set starts with an eight byte header consisting of:
+ * - a two byte eye catcher (0xfeef)
+ * - a one byte counter set number
+ * - a two byte counter set size (indicates the number of counters in this set)
+ * - a three byte reserved value (must be zero) to make the header the same
+ *   size as a counter value.
+ * All counter values are eight byte in size.
+ *
+ * All counter sets are followed by a 64 byte trailer.
+ * The trailer consists of a:
+ * - flag field indicating valid fields when corresponding bit set
+ * - the counter facility first and second version number
+ * - the CPU speed if nonzero
+ * - the time stamp the counter sets have been collected
+ * - the time of day (TOD) base value
+ * - the machine type.
+ *
+ * The counter sets are saved when the process is prepared to be executed on a
+ * CPU and saved again when the process is going to be removed from a CPU.
+ * The difference of both counter sets are calculated and stored in the event
+ * sample data area.
+ */
+
+struct cf_ctrset_entry {	/* CPU-M CF counter set entry (8 byte) */
+	unsigned int def:16;	/* 0-15  Data Entry Format */
+	unsigned int set:16;	/* 16-31 Counter set identifier */
+	unsigned int ctr:16;	/* 32-47 Number of stored counters */
+	unsigned int res1:16;	/* 48-63 Reserved */
+};
+
+struct cf_trailer_entry {	/* CPU-M CF_DIAG trailer (64 byte) */
+	/* 0 - 7 */
+	union {
+		struct {
+			unsigned int clock_base:1;	/* TOD clock base set */
+			unsigned int speed:1;		/* CPU speed set */
+			/* Measurement alerts */
+			unsigned int mtda:1;	/* Loss of MT ctr. data alert */
+			unsigned int caca:1;	/* Counter auth. change alert */
+			unsigned int lcda:1;	/* Loss of counter data alert */
+		};
+		unsigned long flags;	/* 0-63    All indicators */
+	};
+	/* 8 - 15 */
+	unsigned int cfvn:16;			/* 64-79   Ctr First Version */
+	unsigned int csvn:16;			/* 80-95   Ctr Second Version */
+	unsigned int cpu_speed:32;		/* 96-127  CPU speed */
+	/* 16 - 23 */
+	unsigned long timestamp;		/* 128-191 Timestamp (TOD) */
+	/* 24 - 55 */
+	union {
+		struct {
+			unsigned long progusage1;
+			unsigned long progusage2;
+			unsigned long progusage3;
+			unsigned long tod_base;
+		};
+		unsigned long progusage[4];
+	};
+	/* 56 - 63 */
+	unsigned int mach_type:16;		/* Machine type */
+	unsigned int res1:16;			/* Reserved */
+	unsigned int res2:32;			/* Reserved */
+};
+
+/* Create the trailer data at the end of a page. */
+static void cf_diag_trailer(struct cf_trailer_entry *te)
+{
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
+	struct cpuid cpuid;
+
+	te->cfvn = cpuhw->info.cfvn;		/* Counter version numbers */
+	te->csvn = cpuhw->info.csvn;
+
+	get_cpu_id(&cpuid);			/* Machine type */
+	te->mach_type = cpuid.machine;
+	te->cpu_speed = cf_diag_cpu_speed;
+	if (te->cpu_speed)
+		te->speed = 1;
+	te->clock_base = 1;			/* Save clock base */
+	memcpy(&te->tod_base, &tod_clock_base[1], 8);
+	store_tod_clock((__u64 *)&te->timestamp);
+}
+
+/*
+ * Change the CPUMF state to active.
+ * Enable and activate the CPU-counter sets according
+ * to the per-cpu control state.
+ */
+static void cf_diag_enable(struct pmu *pmu)
+{
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
+	int err;
+
+	debug_sprintf_event(cf_diag_dbg, 5,
+			    "%s pmu %p cpu %d flags %#x state %#llx\n",
+			    __func__, pmu, smp_processor_id(), cpuhw->flags,
+			    cpuhw->state);
+	if (cpuhw->flags & PMU_F_ENABLED)
+		return;
+
+	err = lcctl(cpuhw->state);
+	if (err) {
+		pr_err("Enabling the performance measuring unit "
+		       "failed with rc=%x\n", err);
+		return;
+	}
+	cpuhw->flags |= PMU_F_ENABLED;
+}
+
+/*
+ * Change the CPUMF state to inactive.
+ * Disable and enable (inactive) the CPU-counter sets according
+ * to the per-cpu control state.
+ */
+static void cf_diag_disable(struct pmu *pmu)
+{
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
+	u64 inactive;
+	int err;
+
+	debug_sprintf_event(cf_diag_dbg, 5,
+			    "%s pmu %p cpu %d flags %#x state %#llx\n",
+			    __func__, pmu, smp_processor_id(), cpuhw->flags,
+			    cpuhw->state);
+	if (!(cpuhw->flags & PMU_F_ENABLED))
+		return;
+
+	inactive = cpuhw->state & ~((1 << CPUMF_LCCTL_ENABLE_SHIFT) - 1);
+	err = lcctl(inactive);
+	if (err) {
+		pr_err("Disabling the performance measuring unit "
+		       "failed with rc=%x\n", err);
+		return;
+	}
+	cpuhw->flags &= ~PMU_F_ENABLED;
+}
+
+/* Number of perf events counting hardware events */
+static atomic_t cf_diag_events = ATOMIC_INIT(0);
+
+/* Release the PMU if event is the last perf event */
+static void cf_diag_perf_event_destroy(struct perf_event *event)
+{
+	debug_sprintf_event(cf_diag_dbg, 5,
+			    "%s event %p cpu %d cf_diag_events %d\n",
+			    __func__, event, event->cpu,
+			    atomic_read(&cf_diag_events));
+	if (atomic_dec_return(&cf_diag_events) == 0)
+		__kernel_cpumcf_end();
+}
+
+/* Setup the event. Test for authorized counter sets and only include counter
+ * sets which are authorized at the time of the setup. Including unauthorized
+ * counter sets result in specification exception (and panic).
+ */
+static int __hw_perf_event_init(struct perf_event *event)
+{
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
+	struct perf_event_attr *attr = &event->attr;
+	enum cpumf_ctr_set i;
+	int err = 0;
+
+	debug_sprintf_event(cf_diag_dbg, 5,
+			    "%s event %p cpu %d authorized %#x\n", __func__,
+			    event, event->cpu, cpuhw->info.auth_ctl);
+
+	event->hw.config = attr->config;
+	event->hw.config_base = 0;
+	local64_set(&event->count, 0);
+
+	/* Add all authorized counter sets to config_base */
+	for (i = CPUMF_CTR_SET_BASIC; i < CPUMF_CTR_SET_MAX; ++i)
+		if (cpuhw->info.auth_ctl & cpumf_ctr_ctl[i])
+			event->hw.config_base |= cpumf_ctr_ctl[i];
+
+	/* No authorized counter sets, nothing to count/sample */
+	if (!event->hw.config_base) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	/* Set sample_period to indicate sampling */
+	event->hw.sample_period = attr->sample_period;
+	local64_set(&event->hw.period_left, event->hw.sample_period);
+	event->hw.last_period  = event->hw.sample_period;
+out:
+	debug_sprintf_event(cf_diag_dbg, 5, "%s err %d config_base %#lx\n",
+			    __func__, err, event->hw.config_base);
+	return err;
+}
+
+static int cf_diag_event_init(struct perf_event *event)
+{
+	struct perf_event_attr *attr = &event->attr;
+	int err = -ENOENT;
+
+	debug_sprintf_event(cf_diag_dbg, 5,
+			    "%s event %p cpu %d config %#llx "
+			    "sample_type %#llx cf_diag_events %d\n", __func__,
+			    event, event->cpu, attr->config, attr->sample_type,
+			    atomic_read(&cf_diag_events));
+
+	if (event->attr.config != PERF_EVENT_CPUM_CF_DIAG ||
+	    event->attr.type != PERF_TYPE_RAW)
+		goto out;
+
+	/* Raw events are used to access counters directly,
+	 * hence do not permit excludes.
+	 * This event is usesless without PERF_SAMPLE_RAW to return counter set
+	 * values as raw data.
+	 */
+	if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv ||
+	    !(attr->sample_type & (PERF_SAMPLE_CPU | PERF_SAMPLE_RAW))) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	/* Initialize for using the CPU-measurement counter facility */
+	if (atomic_inc_return(&cf_diag_events) == 1) {
+		if (__kernel_cpumcf_begin()) {
+			atomic_dec(&cf_diag_events);
+			err = -EBUSY;
+			goto out;
+		}
+	}
+	event->destroy = cf_diag_perf_event_destroy;
+
+	err = __hw_perf_event_init(event);
+	if (unlikely(err))
+		event->destroy(event);
+out:
+	debug_sprintf_event(cf_diag_dbg, 5, "%s err %d\n", __func__, err);
+	return err;
+}
+
+static void cf_diag_read(struct perf_event *event)
+{
+	debug_sprintf_event(cf_diag_dbg, 5, "%s event %p\n", __func__, event);
+}
+
+/* Return the maximum possible counter set size (in number of 8 byte counters)
+ * depending on type and model number.
+ */
+static size_t cf_diag_ctrset_size(enum cpumf_ctr_set ctrset,
+				 struct cpumf_ctr_info *info)
+{
+	size_t ctrset_size = 0;
+
+	switch (ctrset) {
+	case CPUMF_CTR_SET_BASIC:
+		if (info->cfvn >= 1)
+			ctrset_size = 6;
+		break;
+	case CPUMF_CTR_SET_USER:
+		if (info->cfvn == 1)
+			ctrset_size = 6;
+		else if (info->cfvn >= 3)
+			ctrset_size = 2;
+		break;
+	case CPUMF_CTR_SET_CRYPTO:
+		ctrset_size = 16;
+		break;
+	case CPUMF_CTR_SET_EXT:
+		if (info->csvn == 1)
+			ctrset_size = 32;
+		else if (info->csvn == 2)
+			ctrset_size = 48;
+		else if (info->csvn >= 3)
+			ctrset_size = 128;
+		break;
+	case CPUMF_CTR_SET_MT_DIAG:
+		if (info->csvn > 3)
+			ctrset_size = 48;
+		break;
+	case CPUMF_CTR_SET_MAX:
+		break;
+	}
+
+	return ctrset_size;
+}
+
+/* Calculate memory needed to store all counter sets together with header and
+ * trailer data. This is independend of the counter set authorization which
+ * can vary depending on the configuration.
+ */
+static size_t cf_diag_ctrset_maxsize(struct cpumf_ctr_info *info)
+{
+	size_t max_size = sizeof(struct cf_trailer_entry);
+	enum cpumf_ctr_set i;
+
+	for (i = CPUMF_CTR_SET_BASIC; i < CPUMF_CTR_SET_MAX; ++i) {
+		size_t size = cf_diag_ctrset_size(i, info);
+
+		if (size)
+			max_size += size * sizeof(u64) +
+				    sizeof(struct cf_ctrset_entry);
+	}
+	debug_sprintf_event(cf_diag_dbg, 5, "%s max_size %zu\n", __func__,
+			    max_size);
+
+	return max_size;
+}
+
+/* Read a counter set. The counter set number determines which counter set and
+ * the CPUM-CF first and second version number determine the number of
+ * available counters in this counter set.
+ * Each counter set starts with header containing the counter set number and
+ * the number of 8 byte counters.
+ *
+ * The functions returns the number of bytes occupied by this counter set
+ * including the header.
+ * If there is no counter in the counter set, this counter set is useless and
+ * zero is returned on this case.
+ */
+static size_t cf_diag_getctrset(struct cf_ctrset_entry *ctrdata, int ctrset,
+				size_t room)
+{
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
+	size_t ctrset_size, need = 0;
+	int rc = 3;				/* Assume write failure */
+
+	ctrdata->def = CF_DIAG_CTRSET_DEF;
+	ctrdata->set = ctrset;
+	ctrdata->res1 = 0;
+	ctrset_size = cf_diag_ctrset_size(ctrset, &cpuhw->info);
+
+	if (ctrset_size) {			/* Save data */
+		need = ctrset_size * sizeof(u64) + sizeof(*ctrdata);
+		if (need <= room)
+			rc = ctr_stcctm(ctrset, ctrset_size,
+					(u64 *)(ctrdata + 1));
+		if (rc != 3)
+			ctrdata->ctr = ctrset_size;
+		else
+			need = 0;
+	}
+
+	debug_sprintf_event(cf_diag_dbg, 6,
+			    "%s ctrset %d ctrset_size %zu cfvn %d csvn %d"
+			    " need %zd rc:%d\n",
+			    __func__, ctrset, ctrset_size, cpuhw->info.cfvn,
+			    cpuhw->info.csvn, need, rc);
+	return need;
+}
+
+/* Read out all counter sets and save them in the provided data buffer.
+ * The last 64 byte host an artificial trailer entry.
+ */
+static size_t cf_diag_getctr(void *data, size_t sz, unsigned long auth)
+{
+	struct cf_trailer_entry *trailer;
+	size_t offset = 0, done;
+	int i;
+
+	memset(data, 0, sz);
+	sz -= sizeof(*trailer);			/* Always room for trailer */
+	for (i = CPUMF_CTR_SET_BASIC; i < CPUMF_CTR_SET_MAX; ++i) {
+		struct cf_ctrset_entry *ctrdata = data + offset;
+
+		if (!(auth & cpumf_ctr_ctl[i]))
+			continue;	/* Counter set not authorized */
+
+		done = cf_diag_getctrset(ctrdata, i, sz - offset);
+		offset += done;
+		debug_sprintf_event(cf_diag_dbg, 6,
+				    "%s ctrset %d offset %zu done %zu\n",
+				     __func__, i, offset, done);
+	}
+	trailer = data + offset;
+	cf_diag_trailer(trailer);
+	return offset + sizeof(*trailer);
+}
+
+/* Calculate the difference for each counter in a counter set. */
+static void cf_diag_diffctrset(u64 *pstart, u64 *pstop, int counters)
+{
+	for (; --counters >= 0; ++pstart, ++pstop)
+		if (*pstop >= *pstart)
+			*pstop -= *pstart;
+		else
+			*pstop = *pstart - *pstop;
+}
+
+/* Scan the counter sets and calculate the difference of each counter
+ * in each set. The result is the increment of each counter during the
+ * period the counter set has been activated.
+ *
+ * Return true on success.
+ */
+static int cf_diag_diffctr(struct cf_diag_csd *csd, unsigned long auth)
+{
+	struct cf_trailer_entry *trailer_start, *trailer_stop;
+	struct cf_ctrset_entry *ctrstart, *ctrstop;
+	size_t offset = 0;
+
+	auth &= (1 << CPUMF_LCCTL_ENABLE_SHIFT) - 1;
+	do {
+		ctrstart = (struct cf_ctrset_entry *)(csd->start + offset);
+		ctrstop = (struct cf_ctrset_entry *)(csd->data + offset);
+
+		if (memcmp(ctrstop, ctrstart, sizeof(*ctrstop))) {
+			pr_err("cpum_cf_diag counter set compare error "
+				"in set %i\n", ctrstart->set);
+			return 0;
+		}
+		auth &= ~cpumf_ctr_ctl[ctrstart->set];
+		if (ctrstart->def == CF_DIAG_CTRSET_DEF) {
+			cf_diag_diffctrset((u64 *)(ctrstart + 1),
+					  (u64 *)(ctrstop + 1), ctrstart->ctr);
+			offset += ctrstart->ctr * sizeof(u64) +
+				  sizeof(*ctrstart);
+		}
+		debug_sprintf_event(cf_diag_dbg, 6,
+				    "%s set %d ctr %d offset %zu auth %lx\n",
+				    __func__, ctrstart->set, ctrstart->ctr,
+				    offset, auth);
+	} while (ctrstart->def && auth);
+
+	/* Save time_stamp from start of event in stop's trailer */
+	trailer_start = (struct cf_trailer_entry *)(csd->start + offset);
+	trailer_stop = (struct cf_trailer_entry *)(csd->data + offset);
+	trailer_stop->progusage[0] = trailer_start->timestamp;
+
+	return 1;
+}
+
+/* Create perf event sample with the counter sets as raw data.	The sample
+ * is then pushed to the event subsystem and the function checks for
+ * possible event overflows. If an event overflow occurs, the PMU is
+ * stopped.
+ *
+ * Return non-zero if an event overflow occurred.
+ */
+static int cf_diag_push_sample(struct perf_event *event,
+			       struct cf_diag_csd *csd)
+{
+	struct perf_sample_data data;
+	struct perf_raw_record raw;
+	struct pt_regs regs;
+	int overflow;
+
+	/* Setup perf sample */
+	perf_sample_data_init(&data, 0, event->hw.last_period);
+	memset(&regs, 0, sizeof(regs));
+	memset(&raw, 0, sizeof(raw));
+
+	if (event->attr.sample_type & PERF_SAMPLE_CPU)
+		data.cpu_entry.cpu = event->cpu;
+	if (event->attr.sample_type & PERF_SAMPLE_RAW) {
+		raw.frag.size = csd->used;
+		raw.frag.data = csd->data;
+		raw.size = csd->used;
+		data.raw = &raw;
+	}
+
+	overflow = perf_event_overflow(event, &data, &regs);
+	debug_sprintf_event(cf_diag_dbg, 6,
+			    "%s event %p cpu %d sample_type %#llx raw %d "
+			    "ov %d\n", __func__, event, event->cpu,
+			    event->attr.sample_type, raw.size, overflow);
+	if (overflow)
+		event->pmu->stop(event, 0);
+
+	perf_event_update_userpage(event);
+	return overflow;
+}
+
+static void cf_diag_start(struct perf_event *event, int flags)
+{
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
+	struct cf_diag_csd *csd = this_cpu_ptr(&cf_diag_csd);
+	struct hw_perf_event *hwc = &event->hw;
+
+	debug_sprintf_event(cf_diag_dbg, 5,
+			    "%s event %p cpu %d flags %#x hwc-state %#x\n",
+			    __func__, event, event->cpu, flags, hwc->state);
+	if (WARN_ON_ONCE(!(hwc->state & PERF_HES_STOPPED)))
+		return;
+
+	/* (Re-)enable and activate all counter sets */
+	lcctl(0);		/* Reset counter sets */
+	hwc->state = 0;
+	ctr_set_multiple_enable(&cpuhw->state, hwc->config_base);
+	lcctl(cpuhw->state);	/* Enable counter sets */
+	csd->used = cf_diag_getctr(csd->start, sizeof(csd->start),
+				   event->hw.config_base);
+	ctr_set_multiple_start(&cpuhw->state, hwc->config_base);
+	/* Function cf_diag_enable() starts the counter sets. */
+}
+
+static void cf_diag_stop(struct perf_event *event, int flags)
+{
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
+	struct cf_diag_csd *csd = this_cpu_ptr(&cf_diag_csd);
+	struct hw_perf_event *hwc = &event->hw;
+
+	debug_sprintf_event(cf_diag_dbg, 5,
+			    "%s event %p cpu %d flags %#x hwc-state %#x\n",
+			    __func__, event, event->cpu, flags, hwc->state);
+
+	/* Deactivate all counter sets */
+	ctr_set_multiple_stop(&cpuhw->state, hwc->config_base);
+	local64_inc(&event->count);
+	csd->used = cf_diag_getctr(csd->data, sizeof(csd->data),
+				   event->hw.config_base);
+	if (cf_diag_diffctr(csd, event->hw.config_base))
+		cf_diag_push_sample(event, csd);
+	hwc->state |= PERF_HES_STOPPED;
+}
+
+static int cf_diag_add(struct perf_event *event, int flags)
+{
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
+	int err = 0;
+
+	debug_sprintf_event(cf_diag_dbg, 5,
+			    "%s event %p cpu %d flags %#x cpuhw:%p\n",
+			    __func__, event, event->cpu, flags, cpuhw);
+
+	if (cpuhw->flags & PMU_F_IN_USE) {
+		err = -EAGAIN;
+		goto out;
+	}
+
+	event->hw.state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
+
+	cpuhw->flags |= PMU_F_IN_USE;
+	if (flags & PERF_EF_START)
+		cf_diag_start(event, PERF_EF_RELOAD);
+out:
+	debug_sprintf_event(cf_diag_dbg, 5, "%s err %d\n", __func__, err);
+	return err;
+}
+
+static void cf_diag_del(struct perf_event *event, int flags)
+{
+	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
+
+	debug_sprintf_event(cf_diag_dbg, 5,
+			    "%s event %p cpu %d flags %#x\n",
+			   __func__, event, event->cpu, flags);
+
+	cf_diag_stop(event, PERF_EF_UPDATE);
+	ctr_set_multiple_stop(&cpuhw->state, event->hw.config_base);
+	ctr_set_multiple_disable(&cpuhw->state, event->hw.config_base);
+	cpuhw->flags &= ~PMU_F_IN_USE;
+}
+
+CPUMF_EVENT_ATTR(CF_DIAG, CF_DIAG, PERF_EVENT_CPUM_CF_DIAG);
+
+static struct attribute *cf_diag_events_attr[] = {
+	CPUMF_EVENT_PTR(CF_DIAG, CF_DIAG),
+	NULL,
+};
+
+PMU_FORMAT_ATTR(event, "config:0-63");
+
+static struct attribute *cf_diag_format_attr[] = {
+	&format_attr_event.attr,
+	NULL,
+};
+
+static struct attribute_group cf_diag_events_group = {
+	.name = "events",
+	.attrs = cf_diag_events_attr,
+};
+static struct attribute_group cf_diag_format_group = {
+	.name = "format",
+	.attrs = cf_diag_format_attr,
+};
+static const struct attribute_group *cf_diag_attr_groups[] = {
+	&cf_diag_events_group,
+	&cf_diag_format_group,
+	NULL,
+};
+
+/* Performance monitoring unit for s390x */
+static struct pmu cf_diag = {
+	.task_ctx_nr  = perf_sw_context,
+	.pmu_enable   = cf_diag_enable,
+	.pmu_disable  = cf_diag_disable,
+	.event_init   = cf_diag_event_init,
+	.add	      = cf_diag_add,
+	.del	      = cf_diag_del,
+	.start	      = cf_diag_start,
+	.stop	      = cf_diag_stop,
+	.read	      = cf_diag_read,
+
+	.attr_groups  = cf_diag_attr_groups
+};
+
+/* Get the CPU speed, try sampling facility first and CPU attributes second. */
+static void cf_diag_get_cpu_speed(void)
+{
+	if (cpum_sf_avail()) {			/* Sampling facility first */
+		struct hws_qsi_info_block si;
+
+		memset(&si, 0, sizeof(si));
+		if (!qsi(&si)) {
+			cf_diag_cpu_speed = si.cpu_speed;
+			return;
+		}
+	}
+
+	if (test_facility(34)) {		/* CPU speed extract static part */
+		unsigned long mhz = __ecag(ECAG_CPU_ATTRIBUTE, 0);
+
+		if (mhz != -1UL)
+			cf_diag_cpu_speed = mhz & 0xffffffff;
+	}
+}
+
+/* Initialize the counter set PMU to generate complete counter set data as
+ * event raw data. This relies on the CPU Measurement Counter Facility device
+ * already being loaded and initialized.
+ */
+static int __init cf_diag_init(void)
+{
+	struct cpumf_ctr_info info;
+	size_t need;
+	int rc;
+
+	if (!kernel_cpumcf_avail() || !stccm_avail() || qctri(&info))
+		return -ENODEV;
+	cf_diag_get_cpu_speed();
+
+	/* Make sure the counter set data fits into predefined buffer. */
+	need = cf_diag_ctrset_maxsize(&info);
+	if (need > sizeof(((struct cf_diag_csd *)0)->start)) {
+		pr_err("Insufficient memory for PMU(cpum_cf_diag) need=%zu\n",
+		       need);
+		return -ENOMEM;
+	}
+
+	/* Setup s390dbf facility */
+	cf_diag_dbg = debug_register(KMSG_COMPONENT, 2, 1, 128);
+	if (!cf_diag_dbg) {
+		pr_err("Registration of s390dbf(cpum_cf_diag) failed\n");
+		return -ENOMEM;
+	}
+	debug_register_view(cf_diag_dbg, &debug_sprintf_view);
+
+	rc = perf_pmu_register(&cf_diag, "cpum_cf_diag", PERF_TYPE_RAW);
+	if (rc) {
+		debug_unregister_view(cf_diag_dbg, &debug_sprintf_view);
+		debug_unregister(cf_diag_dbg);
+		pr_err("Registration of PMU(cpum_cf_diag) failed with rc=%i\n",
+		       rc);
+	}
+	return rc;
+}
+arch_initcall(cf_diag_init);

arch/s390/kernel/perf_cpum_cf_events.c

@@ -6,6 +6,7 @@
 
 #include <linux/slab.h>
 #include <linux/perf_event.h>
+#include <asm/cpu_mf.h>
 
 
 /* BEGIN: CPUM_CF COUNTER DEFINITIONS =================================== */

arch/s390/kernel/setup.c

@@ -369,7 +369,7 @@ void __init arch_call_rest_init(void)
 		: : [_frame] "a" (frame));
 }
 
-static void __init setup_lowcore(void)
+static void __init setup_lowcore_dat_off(void)
 {
 	struct lowcore *lc;
 
@@ -380,19 +380,16 @@ static void __init setup_lowcore(void)
 	lc = memblock_alloc_low(sizeof(*lc), sizeof(*lc));
 	lc->restart_psw.mask = PSW_KERNEL_BITS;
 	lc->restart_psw.addr = (unsigned long) restart_int_handler;
-	lc->external_new_psw.mask = PSW_KERNEL_BITS |
+	lc->external_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
-		PSW_MASK_DAT | PSW_MASK_MCHECK;
 	lc->external_new_psw.addr = (unsigned long) ext_int_handler;
 	lc->svc_new_psw.mask = PSW_KERNEL_BITS |
-		PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
+		PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
 	lc->svc_new_psw.addr = (unsigned long) system_call;
-	lc->program_new_psw.mask = PSW_KERNEL_BITS |
+	lc->program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
-		PSW_MASK_DAT | PSW_MASK_MCHECK;
 	lc->program_new_psw.addr = (unsigned long) pgm_check_handler;
 	lc->mcck_new_psw.mask = PSW_KERNEL_BITS;
 	lc->mcck_new_psw.addr = (unsigned long) mcck_int_handler;
-	lc->io_new_psw.mask = PSW_KERNEL_BITS |
+	lc->io_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
-		PSW_MASK_DAT | PSW_MASK_MCHECK;
 	lc->io_new_psw.addr = (unsigned long) io_int_handler;
 	lc->clock_comparator = clock_comparator_max;
 	lc->nodat_stack = ((unsigned long) &init_thread_union)
@@ -452,6 +449,16 @@ static void __init setup_lowcore(void)
 	lowcore_ptr[0] = lc;
 }
 
+static void __init setup_lowcore_dat_on(void)
+{
+	__ctl_clear_bit(0, 28);
+	S390_lowcore.external_new_psw.mask |= PSW_MASK_DAT;
+	S390_lowcore.svc_new_psw.mask |= PSW_MASK_DAT;
+	S390_lowcore.program_new_psw.mask |= PSW_MASK_DAT;
+	S390_lowcore.io_new_psw.mask |= PSW_MASK_DAT;
+	__ctl_set_bit(0, 28);
+}
+
 static struct resource code_resource = {
 	.name  = "Kernel code",
 	.flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
@@ -794,18 +801,9 @@ static void __init reserve_kernel(void)
 {
 	unsigned long start_pfn = PFN_UP(__pa(_end));
 
-#ifdef CONFIG_DMA_API_DEBUG
-	/*
-	 * DMA_API_DEBUG code stumbles over addresses from the
-	 * range [PARMAREA_END, _stext]. Mark the memory as reserved
-	 * so it is not used for CONFIG_DMA_API_DEBUG=y.
-	 */
-	memblock_reserve(0, PFN_PHYS(start_pfn));
-#else
 	memblock_reserve(0, PARMAREA_END);
 	memblock_reserve((unsigned long)_stext, PFN_PHYS(start_pfn)
 			 - (unsigned long)_stext);
-#endif
 }
 
 static void __init setup_memory(void)
@@ -989,6 +987,25 @@ static void __init setup_task_size(void)
 	arch_task_struct_size = task_size;
 }
 
+/*
+ * Issue diagnose 318 to set the control program name and
+ * version codes.
+ */
+static void __init setup_control_program_code(void)
+{
+	union diag318_info diag318_info = {
+		.cpnc = CPNC_LINUX,
+		.cpvc_linux = 0,
+		.cpvc_distro = {0},
+	};
+
+	if (!sclp.has_diag318)
+		return;
+
+	diag_stat_inc(DIAG_STAT_X318);
+	asm volatile("diag %0,0,0x318\n" : : "d" (diag318_info.val));
+}
+
 /*
  * Setup function called from init/main.c just after the banner
  * was printed.
@@ -1033,6 +1050,7 @@ void __init setup_arch(char **cmdline_p)
 	os_info_init();
 	setup_ipl();
 	setup_task_size();
+	setup_control_program_code();
 
 	/* Do some memory reservations *before* memory is added to memblock */
 	reserve_memory_end();
@@ -1072,7 +1090,7 @@ void __init setup_arch(char **cmdline_p)
 #endif
 
 	setup_resources();
-	setup_lowcore();
+	setup_lowcore_dat_off();
 	smp_fill_possible_mask();
 	cpu_detect_mhz_feature();
         cpu_init();
@@ -1085,6 +1103,12 @@ void __init setup_arch(char **cmdline_p)
 	 */
         paging_init();
 
+	/*
+	 * After paging_init created the kernel page table, the new PSWs
+	 * in lowcore can now run with DAT enabled.
+	 */
+	setup_lowcore_dat_on();
+
         /* Setup default console */
 	conmode_default();
 	set_preferred_console();

arch/s390/kernel/swsusp.S

@@ -124,13 +124,13 @@ ENTRY(swsusp_arch_resume)
 	lghi	%r2,1
 	brasl	%r14,arch_set_page_states
 
-	/* Deactivate DAT */
-	stnsm	__SF_EMPTY(%r15),0xfb
-
 	/* Set prefix page to zero */
 	xc	__SF_EMPTY(4,%r15),__SF_EMPTY(%r15)
 	spx	__SF_EMPTY(%r15)
 
+	/* Deactivate DAT */
+	stnsm	__SF_EMPTY(%r15),0xfb
+
 	/* Restore saved image */
 	larl	%r1,restore_pblist
 	lg	%r1,0(%r1)

arch/s390/kernel/sys_s390.c

@@ -58,6 +58,7 @@ out:
 	return error;
 }
 
+#ifdef CONFIG_SYSVIPC
 /*
  * sys_ipc() is the de-multiplexer for the SysV IPC calls.
  */
@@ -74,19 +75,28 @@ SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, unsigned long, second,
 	 * Therefore we can call the generic variant by simply passing the
 	 * third parameter also as fifth parameter.
 	 */
-	return sys_ipc(call, first, second, third, ptr, third);
+	return ksys_ipc(call, first, second, third, ptr, third);
 }
+#endif /* CONFIG_SYSVIPC */
 
 SYSCALL_DEFINE1(s390_personality, unsigned int, personality)
 {
-	unsigned int ret;
+	unsigned int ret = current->personality;
 
 	if (personality(current->personality) == PER_LINUX32 &&
 	    personality(personality) == PER_LINUX)
 		personality |= PER_LINUX32;
-	ret = sys_personality(personality);
+
+	if (personality != 0xffffffff)
+		set_personality(personality);
+
 	if (personality(ret) == PER_LINUX32)
 		ret &= ~PER_LINUX32;
 
 	return ret;
 }
+
+SYSCALL_DEFINE0(ni_syscall)
+{
+	return -ENOSYS;
+}

arch/s390/kernel/syscalls/syscall.tbl

@@ -15,86 +15,86 @@
 5    common	open			sys_open			compat_sys_open
 6    common	close			sys_close			sys_close
 7    common	restart_syscall		sys_restart_syscall		sys_restart_syscall
-8    common	creat			sys_creat			compat_sys_creat
+8    common	creat			sys_creat			sys_creat
-9    common	link			sys_link			compat_sys_link
+9    common	link			sys_link			sys_link
-10   common	unlink			sys_unlink			compat_sys_unlink
+10   common	unlink			sys_unlink			sys_unlink
 11   common	execve			sys_execve			compat_sys_execve
-12   common	chdir			sys_chdir			compat_sys_chdir
+12   common	chdir			sys_chdir			sys_chdir
 13   32		time			-				compat_sys_time
-14   common	mknod			sys_mknod			compat_sys_mknod
+14   common	mknod			sys_mknod			sys_mknod
-15   common	chmod			sys_chmod			compat_sys_chmod
+15   common	chmod			sys_chmod			sys_chmod
-16   32		lchown			-				compat_sys_s390_lchown16
+16   32		lchown			-				sys_lchown16
 19   common	lseek			sys_lseek			compat_sys_lseek
 20   common	getpid			sys_getpid			sys_getpid
 21   common	mount			sys_mount			compat_sys_mount
-22   common	umount			sys_oldumount			compat_sys_oldumount
+22   common	umount			sys_oldumount			sys_oldumount
-23   32		setuid			-				compat_sys_s390_setuid16
+23   32		setuid			-				sys_setuid16
-24   32		getuid			-				compat_sys_s390_getuid16
+24   32		getuid			-				sys_getuid16
 25   32		stime			-				compat_sys_stime
 26   common	ptrace			sys_ptrace			compat_sys_ptrace
 27   common	alarm			sys_alarm			sys_alarm
 29   common	pause			sys_pause			sys_pause
 30   common	utime			sys_utime			compat_sys_utime
-33   common	access			sys_access			compat_sys_access
+33   common	access			sys_access			sys_access
 34   common	nice			sys_nice			sys_nice
 36   common	sync			sys_sync			sys_sync
 37   common	kill			sys_kill			sys_kill
-38   common	rename			sys_rename			compat_sys_rename
+38   common	rename			sys_rename			sys_rename
-39   common	mkdir			sys_mkdir			compat_sys_mkdir
+39   common	mkdir			sys_mkdir			sys_mkdir
-40   common	rmdir			sys_rmdir			compat_sys_rmdir
+40   common	rmdir			sys_rmdir			sys_rmdir
 41   common	dup			sys_dup				sys_dup
-42   common	pipe			sys_pipe			compat_sys_pipe
+42   common	pipe			sys_pipe			sys_pipe
 43   common	times			sys_times			compat_sys_times
-45   common	brk			sys_brk				compat_sys_brk
+45   common	brk			sys_brk				sys_brk
-46   32		setgid			-				compat_sys_s390_setgid16
+46   32		setgid			-				sys_setgid16
-47   32		getgid			-				compat_sys_s390_getgid16
+47   32		getgid			-				sys_getgid16
-48   common	signal			sys_signal			compat_sys_signal
+48   common	signal			sys_signal			sys_signal
-49   32		geteuid			-				compat_sys_s390_geteuid16
+49   32		geteuid			-				sys_geteuid16
-50   32		getegid			-				compat_sys_s390_getegid16
+50   32		getegid			-				sys_getegid16
-51   common	acct			sys_acct			compat_sys_acct
+51   common	acct			sys_acct			sys_acct
-52   common	umount2			sys_umount			compat_sys_umount
+52   common	umount2			sys_umount			sys_umount
 54   common	ioctl			sys_ioctl			compat_sys_ioctl
 55   common	fcntl			sys_fcntl			compat_sys_fcntl
 57   common	setpgid			sys_setpgid			sys_setpgid
 60   common	umask			sys_umask			sys_umask
-61   common	chroot			sys_chroot			compat_sys_chroot
+61   common	chroot			sys_chroot			sys_chroot
 62   common	ustat			sys_ustat			compat_sys_ustat
 63   common	dup2			sys_dup2			sys_dup2
 64   common	getppid			sys_getppid			sys_getppid
 65   common	getpgrp			sys_getpgrp			sys_getpgrp
 66   common	setsid			sys_setsid			sys_setsid
 67   common	sigaction		sys_sigaction			compat_sys_sigaction
-70   32		setreuid		-				compat_sys_s390_setreuid16
+70   32		setreuid		-				sys_setreuid16
-71   32		setregid		-				compat_sys_s390_setregid16
+71   32		setregid		-				sys_setregid16
-72   common	sigsuspend		sys_sigsuspend			compat_sys_sigsuspend
+72   common	sigsuspend		sys_sigsuspend			sys_sigsuspend
 73   common	sigpending		sys_sigpending			compat_sys_sigpending
-74   common	sethostname		sys_sethostname			compat_sys_sethostname
+74   common	sethostname		sys_sethostname			sys_sethostname
 75   common	setrlimit		sys_setrlimit			compat_sys_setrlimit
 76   32		getrlimit		-				compat_sys_old_getrlimit
 77   common	getrusage		sys_getrusage			compat_sys_getrusage
 78   common	gettimeofday		sys_gettimeofday		compat_sys_gettimeofday
 79   common	settimeofday		sys_settimeofday		compat_sys_settimeofday
-80   32		getgroups		-				compat_sys_s390_getgroups16
+80   32		getgroups		-				sys_getgroups16
-81   32		setgroups		-				compat_sys_s390_setgroups16
+81   32		setgroups		-				sys_setgroups16
-83   common	symlink			sys_symlink			compat_sys_symlink
+83   common	symlink			sys_symlink			sys_symlink
-85   common	readlink		sys_readlink			compat_sys_readlink
+85   common	readlink		sys_readlink			sys_readlink
-86   common	uselib			sys_uselib			compat_sys_uselib
+86   common	uselib			sys_uselib			sys_uselib
-87   common	swapon			sys_swapon			compat_sys_swapon
+87   common	swapon			sys_swapon			sys_swapon
-88   common	reboot			sys_reboot			compat_sys_reboot
+88   common	reboot			sys_reboot			sys_reboot
 89   common	readdir			-				compat_sys_old_readdir
 90   common	mmap			sys_old_mmap			compat_sys_s390_old_mmap
-91   common	munmap			sys_munmap			compat_sys_munmap
+91   common	munmap			sys_munmap			sys_munmap
 92   common	truncate		sys_truncate			compat_sys_truncate
 93   common	ftruncate		sys_ftruncate			compat_sys_ftruncate
 94   common	fchmod			sys_fchmod			sys_fchmod
-95   32		fchown			-				compat_sys_s390_fchown16
+95   32		fchown			-				sys_fchown16
 96   common	getpriority		sys_getpriority			sys_getpriority
 97   common	setpriority		sys_setpriority			sys_setpriority
 99   common	statfs			sys_statfs			compat_sys_statfs
 100  common	fstatfs			sys_fstatfs			compat_sys_fstatfs
 101  32		ioperm			-				-
 102  common	socketcall		sys_socketcall			compat_sys_socketcall
-103  common	syslog			sys_syslog			compat_sys_syslog
+103  common	syslog			sys_syslog			sys_syslog
 104  common	setitimer		sys_setitimer			compat_sys_setitimer
 105  common	getitimer		sys_getitimer			compat_sys_getitimer
 106  common	stat			sys_newstat			compat_sys_newstat
@@ -104,63 +104,63 @@
 111  common	vhangup			sys_vhangup			sys_vhangup
 112  common	idle			-				-
 114  common	wait4			sys_wait4			compat_sys_wait4
-115  common	swapoff			sys_swapoff			compat_sys_swapoff
+115  common	swapoff			sys_swapoff			sys_swapoff
 116  common	sysinfo			sys_sysinfo			compat_sys_sysinfo
 117  common	ipc			sys_s390_ipc			compat_sys_s390_ipc
 118  common	fsync			sys_fsync			sys_fsync
 119  common	sigreturn		sys_sigreturn			compat_sys_sigreturn
-120  common	clone			sys_clone			compat_sys_clone
+120  common	clone			sys_clone			sys_clone
-121  common	setdomainname		sys_setdomainname		compat_sys_setdomainname
+121  common	setdomainname		sys_setdomainname		sys_setdomainname
-122  common	uname			sys_newuname			compat_sys_newuname
+122  common	uname			sys_newuname			sys_newuname
 124  common	adjtimex		sys_adjtimex			compat_sys_adjtimex
-125  common	mprotect		sys_mprotect			compat_sys_mprotect
+125  common	mprotect		sys_mprotect			sys_mprotect
 126  common	sigprocmask		sys_sigprocmask			compat_sys_sigprocmask
 127  common	create_module		-				-
-128  common	init_module		sys_init_module			compat_sys_init_module
+128  common	init_module		sys_init_module			sys_init_module
-129  common	delete_module		sys_delete_module		compat_sys_delete_module
+129  common	delete_module		sys_delete_module		sys_delete_module
 130  common	get_kernel_syms		-				-
-131  common	quotactl		sys_quotactl			compat_sys_quotactl
+131  common	quotactl		sys_quotactl			sys_quotactl
 132  common	getpgid			sys_getpgid			sys_getpgid
 133  common	fchdir			sys_fchdir			sys_fchdir
-134  common	bdflush			sys_bdflush			compat_sys_bdflush
+134  common	bdflush			sys_bdflush			sys_bdflush
-135  common	sysfs			sys_sysfs			compat_sys_sysfs
+135  common	sysfs			sys_sysfs			sys_sysfs
 136  common	personality		sys_s390_personality		sys_s390_personality
 137  common	afs_syscall		-				-
-138  32		setfsuid		-				compat_sys_s390_setfsuid16
+138  32		setfsuid		-				sys_setfsuid16
-139  32		setfsgid		-				compat_sys_s390_setfsgid16
+139  32		setfsgid		-				sys_setfsgid16
-140  32		_llseek			-				compat_sys_llseek
+140  32		_llseek			-				sys_llseek
 141  common	getdents		sys_getdents			compat_sys_getdents
 142  32		_newselect		-				compat_sys_select
 142  64		select			sys_select			-
 143  common	flock			sys_flock			sys_flock
-144  common	msync			sys_msync			compat_sys_msync
+144  common	msync			sys_msync			sys_msync
 145  common	readv			sys_readv			compat_sys_readv
 146  common	writev			sys_writev			compat_sys_writev
 147  common	getsid			sys_getsid			sys_getsid
 148  common	fdatasync		sys_fdatasync			sys_fdatasync
 149  common	_sysctl			sys_sysctl			compat_sys_sysctl
-150  common	mlock			sys_mlock			compat_sys_mlock
+150  common	mlock			sys_mlock			sys_mlock
-151  common	munlock			sys_munlock			compat_sys_munlock
+151  common	munlock			sys_munlock			sys_munlock
 152  common	mlockall		sys_mlockall			sys_mlockall
 153  common	munlockall		sys_munlockall			sys_munlockall
-154  common	sched_setparam		sys_sched_setparam		compat_sys_sched_setparam
+154  common	sched_setparam		sys_sched_setparam		sys_sched_setparam
-155  common	sched_getparam		sys_sched_getparam		compat_sys_sched_getparam
+155  common	sched_getparam		sys_sched_getparam		sys_sched_getparam
-156  common	sched_setscheduler	sys_sched_setscheduler		compat_sys_sched_setscheduler
+156  common	sched_setscheduler	sys_sched_setscheduler		sys_sched_setscheduler
 157  common	sched_getscheduler	sys_sched_getscheduler		sys_sched_getscheduler
 158  common	sched_yield		sys_sched_yield			sys_sched_yield
 159  common	sched_get_priority_max	sys_sched_get_priority_max	sys_sched_get_priority_max
 160  common	sched_get_priority_min	sys_sched_get_priority_min	sys_sched_get_priority_min
 161  common	sched_rr_get_interval	sys_sched_rr_get_interval	compat_sys_sched_rr_get_interval
 162  common	nanosleep		sys_nanosleep			compat_sys_nanosleep
-163  common	mremap			sys_mremap			compat_sys_mremap
+163  common	mremap			sys_mremap			sys_mremap
-164  32		setresuid		-				compat_sys_s390_setresuid16
+164  32		setresuid		-				sys_setresuid16
-165  32		getresuid		-				compat_sys_s390_getresuid16
+165  32		getresuid		-				sys_getresuid16
 167  common	query_module		-				-
-168  common	poll			sys_poll			compat_sys_poll
+168  common	poll			sys_poll			sys_poll
 169  common	nfsservctl		-				-
-170  32		setresgid		-				compat_sys_s390_setresgid16
+170  32		setresgid		-				sys_setresgid16
-171  32		getresgid		-				compat_sys_s390_getresgid16
+171  32		getresgid		-				sys_getresgid16
-172  common	prctl			sys_prctl			compat_sys_prctl
+172  common	prctl			sys_prctl			sys_prctl
 173  common	rt_sigreturn		sys_rt_sigreturn		compat_sys_rt_sigreturn
 174  common	rt_sigaction		sys_rt_sigaction		compat_sys_rt_sigaction
 175  common	rt_sigprocmask		sys_rt_sigprocmask		compat_sys_rt_sigprocmask
@@ -170,10 +170,10 @@
 179  common	rt_sigsuspend		sys_rt_sigsuspend		compat_sys_rt_sigsuspend
 180  common	pread64			sys_pread64			compat_sys_s390_pread64
 181  common	pwrite64		sys_pwrite64			compat_sys_s390_pwrite64
-182  32		chown			-				compat_sys_s390_chown16
+182  32		chown			-				sys_chown16
-183  common	getcwd			sys_getcwd			compat_sys_getcwd
+183  common	getcwd			sys_getcwd			sys_getcwd
-184  common	capget			sys_capget			compat_sys_capget
+184  common	capget			sys_capget			sys_capget
-185  common	capset			sys_capset			compat_sys_capset
+185  common	capset			sys_capset			sys_capset
 186  common	sigaltstack		sys_sigaltstack			compat_sys_sigaltstack
 187  common	sendfile		sys_sendfile64			compat_sys_sendfile
 188  common	getpmsg			-				-
@@ -187,7 +187,7 @@
 195  32		stat64			-				compat_sys_s390_stat64
 196  32		lstat64			-				compat_sys_s390_lstat64
 197  32		fstat64			-				compat_sys_s390_fstat64
-198  32		lchown32		-				compat_sys_lchown
+198  32		lchown32		-				sys_lchown
 198  64		lchown			sys_lchown			-
 199  32		getuid32		-				sys_getuid
 199  64		getuid			sys_getuid			-
@@ -201,21 +201,21 @@
 203  64		setreuid		sys_setreuid			-
 204  32		setregid32		-				sys_setregid
 204  64		setregid		sys_setregid			-
-205  32		getgroups32		-				compat_sys_getgroups
+205  32		getgroups32		-				sys_getgroups
 205  64		getgroups		sys_getgroups			-
-206  32		setgroups32		-				compat_sys_setgroups
+206  32		setgroups32		-				sys_setgroups
 206  64		setgroups		sys_setgroups			-
 207  32		fchown32		-				sys_fchown
 207  64		fchown			sys_fchown			-
 208  32		setresuid32		-				sys_setresuid
 208  64		setresuid		sys_setresuid			-
-209  32		getresuid32		-				compat_sys_getresuid
+209  32		getresuid32		-				sys_getresuid
 209  64		getresuid		sys_getresuid			-
 210  32		setresgid32		-				sys_setresgid
 210  64		setresgid		sys_setresgid			-
-211  32		getresgid32		-				compat_sys_getresgid
+211  32		getresgid32		-				sys_getresgid
 211  64		getresgid		sys_getresgid			-
-212  32		chown32			-				compat_sys_chown
+212  32		chown32			-				sys_chown
 212  64		chown			sys_chown			-
 213  32		setuid32		-				sys_setuid
 213  64		setuid			sys_setuid			-
@@ -225,25 +225,25 @@
 215  64		setfsuid		sys_setfsuid			-
 216  32		setfsgid32		-				sys_setfsgid
 216  64		setfsgid		sys_setfsgid			-
-217  common	pivot_root		sys_pivot_root			compat_sys_pivot_root
+217  common	pivot_root		sys_pivot_root			sys_pivot_root
-218  common	mincore			sys_mincore			compat_sys_mincore
+218  common	mincore			sys_mincore			sys_mincore
-219  common	madvise			sys_madvise			compat_sys_madvise
+219  common	madvise			sys_madvise			sys_madvise
-220  common	getdents64		sys_getdents64			compat_sys_getdents64
+220  common	getdents64		sys_getdents64			sys_getdents64
 221  32		fcntl64			-				compat_sys_fcntl64
 222  common	readahead		sys_readahead			compat_sys_s390_readahead
 223  32		sendfile64		-				compat_sys_sendfile64
-224  common	setxattr		sys_setxattr			compat_sys_setxattr
+224  common	setxattr		sys_setxattr			sys_setxattr
-225  common	lsetxattr		sys_lsetxattr			compat_sys_lsetxattr
+225  common	lsetxattr		sys_lsetxattr			sys_lsetxattr
-226  common	fsetxattr		sys_fsetxattr			compat_sys_fsetxattr
+226  common	fsetxattr		sys_fsetxattr			sys_fsetxattr
-227  common	getxattr		sys_getxattr			compat_sys_getxattr
+227  common	getxattr		sys_getxattr			sys_getxattr
-228  common	lgetxattr		sys_lgetxattr			compat_sys_lgetxattr
+228  common	lgetxattr		sys_lgetxattr			sys_lgetxattr
-229  common	fgetxattr		sys_fgetxattr			compat_sys_fgetxattr
+229  common	fgetxattr		sys_fgetxattr			sys_fgetxattr
-230  common	listxattr		sys_listxattr			compat_sys_listxattr
+230  common	listxattr		sys_listxattr			sys_listxattr
-231  common	llistxattr		sys_llistxattr			compat_sys_llistxattr
+231  common	llistxattr		sys_llistxattr			sys_llistxattr
-232  common	flistxattr		sys_flistxattr			compat_sys_flistxattr
+232  common	flistxattr		sys_flistxattr			sys_flistxattr
-233  common	removexattr		sys_removexattr			compat_sys_removexattr
+233  common	removexattr		sys_removexattr			sys_removexattr
-234  common	lremovexattr		sys_lremovexattr		compat_sys_lremovexattr
+234  common	lremovexattr		sys_lremovexattr		sys_lremovexattr
-235  common	fremovexattr		sys_fremovexattr		compat_sys_fremovexattr
+235  common	fremovexattr		sys_fremovexattr		sys_fremovexattr
 236  common	gettid			sys_gettid			sys_gettid
 237  common	tkill			sys_tkill			sys_tkill
 238  common	futex			sys_futex			compat_sys_futex
@@ -251,15 +251,15 @@
 240  common	sched_getaffinity	sys_sched_getaffinity		compat_sys_sched_getaffinity
 241  common	tgkill			sys_tgkill			sys_tgkill
 243  common	io_setup		sys_io_setup			compat_sys_io_setup
-244  common	io_destroy		sys_io_destroy			compat_sys_io_destroy
+244  common	io_destroy		sys_io_destroy			sys_io_destroy
 245  common	io_getevents		sys_io_getevents		compat_sys_io_getevents
 246  common	io_submit		sys_io_submit			compat_sys_io_submit
-247  common	io_cancel		sys_io_cancel			compat_sys_io_cancel
+247  common	io_cancel		sys_io_cancel			sys_io_cancel
 248  common	exit_group		sys_exit_group			sys_exit_group
 249  common	epoll_create		sys_epoll_create		sys_epoll_create
-250  common	epoll_ctl		sys_epoll_ctl			compat_sys_epoll_ctl
+250  common	epoll_ctl		sys_epoll_ctl			sys_epoll_ctl
-251  common	epoll_wait		sys_epoll_wait			compat_sys_epoll_wait
+251  common	epoll_wait		sys_epoll_wait			sys_epoll_wait
-252  common	set_tid_address		sys_set_tid_address		compat_sys_set_tid_address
+252  common	set_tid_address		sys_set_tid_address		sys_set_tid_address
 253  common	fadvise64		sys_fadvise64_64		compat_sys_s390_fadvise64
 254  common	timer_create		sys_timer_create		compat_sys_timer_create
 255  common	timer_settime		sys_timer_settime		compat_sys_timer_settime
@@ -273,52 +273,52 @@
 264  32		fadvise64_64		-				compat_sys_s390_fadvise64_64
 265  common	statfs64		sys_statfs64			compat_sys_statfs64
 266  common	fstatfs64		sys_fstatfs64			compat_sys_fstatfs64
-267  common	remap_file_pages	sys_remap_file_pages		compat_sys_remap_file_pages
+267  common	remap_file_pages	sys_remap_file_pages		sys_remap_file_pages
 268  common	mbind			sys_mbind			compat_sys_mbind
 269  common	get_mempolicy		sys_get_mempolicy		compat_sys_get_mempolicy
 270  common	set_mempolicy		sys_set_mempolicy		compat_sys_set_mempolicy
 271  common	mq_open			sys_mq_open			compat_sys_mq_open
-272  common	mq_unlink		sys_mq_unlink			compat_sys_mq_unlink
+272  common	mq_unlink		sys_mq_unlink			sys_mq_unlink
 273  common	mq_timedsend		sys_mq_timedsend		compat_sys_mq_timedsend
 274  common	mq_timedreceive		sys_mq_timedreceive		compat_sys_mq_timedreceive
 275  common	mq_notify		sys_mq_notify			compat_sys_mq_notify
 276  common	mq_getsetattr		sys_mq_getsetattr		compat_sys_mq_getsetattr
 277  common	kexec_load		sys_kexec_load			compat_sys_kexec_load
-278  common	add_key			sys_add_key			compat_sys_add_key
+278  common	add_key			sys_add_key			sys_add_key
-279  common	request_key		sys_request_key			compat_sys_request_key
+279  common	request_key		sys_request_key			sys_request_key
 280  common	keyctl			sys_keyctl			compat_sys_keyctl
 281  common	waitid			sys_waitid			compat_sys_waitid
 282  common	ioprio_set		sys_ioprio_set			sys_ioprio_set
 283  common	ioprio_get		sys_ioprio_get			sys_ioprio_get
 284  common	inotify_init		sys_inotify_init		sys_inotify_init
-285  common	inotify_add_watch	sys_inotify_add_watch		compat_sys_inotify_add_watch
+285  common	inotify_add_watch	sys_inotify_add_watch		sys_inotify_add_watch
 286  common	inotify_rm_watch	sys_inotify_rm_watch		sys_inotify_rm_watch
 287  common	migrate_pages		sys_migrate_pages		compat_sys_migrate_pages
 288  common	openat			sys_openat			compat_sys_openat
-289  common	mkdirat			sys_mkdirat			compat_sys_mkdirat
+289  common	mkdirat			sys_mkdirat			sys_mkdirat
-290  common	mknodat			sys_mknodat			compat_sys_mknodat
+290  common	mknodat			sys_mknodat			sys_mknodat
-291  common	fchownat		sys_fchownat			compat_sys_fchownat
+291  common	fchownat		sys_fchownat			sys_fchownat
 292  common	futimesat		sys_futimesat			compat_sys_futimesat
 293  32		fstatat64		-				compat_sys_s390_fstatat64
 293  64		newfstatat		sys_newfstatat			-
-294  common	unlinkat		sys_unlinkat			compat_sys_unlinkat
+294  common	unlinkat		sys_unlinkat			sys_unlinkat
-295  common	renameat		sys_renameat			compat_sys_renameat
+295  common	renameat		sys_renameat			sys_renameat
-296  common	linkat			sys_linkat			compat_sys_linkat
+296  common	linkat			sys_linkat			sys_linkat
-297  common	symlinkat		sys_symlinkat			compat_sys_symlinkat
+297  common	symlinkat		sys_symlinkat			sys_symlinkat
-298  common	readlinkat		sys_readlinkat			compat_sys_readlinkat
+298  common	readlinkat		sys_readlinkat			sys_readlinkat
-299  common	fchmodat		sys_fchmodat			compat_sys_fchmodat
+299  common	fchmodat		sys_fchmodat			sys_fchmodat
-300  common	faccessat		sys_faccessat			compat_sys_faccessat
+300  common	faccessat		sys_faccessat			sys_faccessat
 301  common	pselect6		sys_pselect6			compat_sys_pselect6
 302  common	ppoll			sys_ppoll			compat_sys_ppoll
-303  common	unshare			sys_unshare			compat_sys_unshare
+303  common	unshare			sys_unshare			sys_unshare
 304  common	set_robust_list		sys_set_robust_list		compat_sys_set_robust_list
 305  common	get_robust_list		sys_get_robust_list		compat_sys_get_robust_list
-306  common	splice			sys_splice			compat_sys_splice
+306  common	splice			sys_splice			sys_splice
 307  common	sync_file_range		sys_sync_file_range		compat_sys_s390_sync_file_range
-308  common	tee			sys_tee				compat_sys_tee
+308  common	tee			sys_tee				sys_tee
 309  common	vmsplice		sys_vmsplice			compat_sys_vmsplice
 310  common	move_pages		sys_move_pages			compat_sys_move_pages
-311  common	getcpu			sys_getcpu			compat_sys_getcpu
+311  common	getcpu			sys_getcpu			sys_getcpu
 312  common	epoll_pwait		sys_epoll_pwait			compat_sys_epoll_pwait
 313  common	utimes			sys_utimes			compat_sys_utimes
 314  common	fallocate		sys_fallocate			compat_sys_s390_fallocate
@@ -332,17 +332,17 @@
 322  common	signalfd4		sys_signalfd4			compat_sys_signalfd4
 323  common	eventfd2		sys_eventfd2			sys_eventfd2
 324  common	inotify_init1		sys_inotify_init1		sys_inotify_init1
-325  common	pipe2			sys_pipe2			compat_sys_pipe2
+325  common	pipe2			sys_pipe2			sys_pipe2
 326  common	dup3			sys_dup3			sys_dup3
 327  common	epoll_create1		sys_epoll_create1		sys_epoll_create1
 328  common	preadv			sys_preadv			compat_sys_preadv
 329  common	pwritev			sys_pwritev			compat_sys_pwritev
 330  common	rt_tgsigqueueinfo	sys_rt_tgsigqueueinfo		compat_sys_rt_tgsigqueueinfo
-331  common	perf_event_open		sys_perf_event_open		compat_sys_perf_event_open
+331  common	perf_event_open		sys_perf_event_open		sys_perf_event_open
 332  common	fanotify_init		sys_fanotify_init		sys_fanotify_init
 333  common	fanotify_mark		sys_fanotify_mark		compat_sys_fanotify_mark
-334  common	prlimit64		sys_prlimit64			compat_sys_prlimit64
+334  common	prlimit64		sys_prlimit64			sys_prlimit64
-335  common	name_to_handle_at	sys_name_to_handle_at		compat_sys_name_to_handle_at
+335  common	name_to_handle_at	sys_name_to_handle_at		sys_name_to_handle_at
 336  common	open_by_handle_at	sys_open_by_handle_at		compat_sys_open_by_handle_at
 337  common	clock_adjtime		sys_clock_adjtime		compat_sys_clock_adjtime
 338  common	syncfs			sys_syncfs			sys_syncfs
@@ -350,44 +350,44 @@
 340  common	process_vm_readv	sys_process_vm_readv		compat_sys_process_vm_readv
 341  common	process_vm_writev	sys_process_vm_writev		compat_sys_process_vm_writev
 342  common	s390_runtime_instr	sys_s390_runtime_instr		sys_s390_runtime_instr
-343  common	kcmp			sys_kcmp			compat_sys_kcmp
+343  common	kcmp			sys_kcmp			sys_kcmp
-344  common	finit_module		sys_finit_module		compat_sys_finit_module
+344  common	finit_module		sys_finit_module		sys_finit_module
-345  common	sched_setattr		sys_sched_setattr		compat_sys_sched_setattr
+345  common	sched_setattr		sys_sched_setattr		sys_sched_setattr
-346  common	sched_getattr		sys_sched_getattr		compat_sys_sched_getattr
+346  common	sched_getattr		sys_sched_getattr		sys_sched_getattr
-347  common	renameat2		sys_renameat2			compat_sys_renameat2
+347  common	renameat2		sys_renameat2			sys_renameat2
-348  common	seccomp			sys_seccomp			compat_sys_seccomp
+348  common	seccomp			sys_seccomp			sys_seccomp
-349  common	getrandom		sys_getrandom			compat_sys_getrandom
+349  common	getrandom		sys_getrandom			sys_getrandom
-350  common	memfd_create		sys_memfd_create		compat_sys_memfd_create
+350  common	memfd_create		sys_memfd_create		sys_memfd_create
-351  common	bpf			sys_bpf				compat_sys_bpf
+351  common	bpf			sys_bpf				sys_bpf
-352  common	s390_pci_mmio_write	sys_s390_pci_mmio_write		compat_sys_s390_pci_mmio_write
+352  common	s390_pci_mmio_write	sys_s390_pci_mmio_write		sys_s390_pci_mmio_write
-353  common	s390_pci_mmio_read	sys_s390_pci_mmio_read		compat_sys_s390_pci_mmio_read
+353  common	s390_pci_mmio_read	sys_s390_pci_mmio_read		sys_s390_pci_mmio_read
 354  common	execveat		sys_execveat			compat_sys_execveat
 355  common	userfaultfd		sys_userfaultfd			sys_userfaultfd
 356  common	membarrier		sys_membarrier			sys_membarrier
 357  common	recvmmsg		sys_recvmmsg			compat_sys_recvmmsg
 358  common	sendmmsg		sys_sendmmsg			compat_sys_sendmmsg
 359  common	socket			sys_socket			sys_socket
-360  common	socketpair		sys_socketpair			compat_sys_socketpair
+360  common	socketpair		sys_socketpair			sys_socketpair
-361  common	bind			sys_bind			compat_sys_bind
+361  common	bind			sys_bind			sys_bind
-362  common	connect			sys_connect			compat_sys_connect
+362  common	connect			sys_connect			sys_connect
 363  common	listen			sys_listen			sys_listen
-364  common	accept4			sys_accept4			compat_sys_accept4
+364  common	accept4			sys_accept4			sys_accept4
 365  common	getsockopt		sys_getsockopt			compat_sys_getsockopt
 366  common	setsockopt		sys_setsockopt			compat_sys_setsockopt
-367  common	getsockname		sys_getsockname			compat_sys_getsockname
+367  common	getsockname		sys_getsockname			sys_getsockname
-368  common	getpeername		sys_getpeername			compat_sys_getpeername
+368  common	getpeername		sys_getpeername			sys_getpeername
-369  common	sendto			sys_sendto			compat_sys_sendto
+369  common	sendto			sys_sendto			sys_sendto
 370  common	sendmsg			sys_sendmsg			compat_sys_sendmsg
 371  common	recvfrom		sys_recvfrom			compat_sys_recvfrom
 372  common	recvmsg			sys_recvmsg			compat_sys_recvmsg
 373  common	shutdown		sys_shutdown			sys_shutdown
-374  common	mlock2			sys_mlock2			compat_sys_mlock2
+374  common	mlock2			sys_mlock2			sys_mlock2
-375  common	copy_file_range		sys_copy_file_range		compat_sys_copy_file_range
+375  common	copy_file_range		sys_copy_file_range		sys_copy_file_range
 376  common	preadv2			sys_preadv2			compat_sys_preadv2
 377  common	pwritev2		sys_pwritev2			compat_sys_pwritev2
-378  common	s390_guarded_storage	sys_s390_guarded_storage	compat_sys_s390_guarded_storage
+378  common	s390_guarded_storage	sys_s390_guarded_storage	sys_s390_guarded_storage
-379  common	statx			sys_statx			compat_sys_statx
+379  common	statx			sys_statx			sys_statx
-380  common	s390_sthyi		sys_s390_sthyi			compat_sys_s390_sthyi
+380  common	s390_sthyi		sys_s390_sthyi			sys_s390_sthyi
-381  common	kexec_file_load		sys_kexec_file_load		compat_sys_kexec_file_load
+381  common	kexec_file_load		sys_kexec_file_load		sys_kexec_file_load
 382  common	io_pgetevents		sys_io_pgetevents		compat_sys_io_pgetevents
-383  common	rseq			sys_rseq			compat_sys_rseq
+383  common	rseq			sys_rseq			sys_rseq

arch/s390/kernel/sysinfo.c

@@ -545,8 +545,6 @@ static __init int stsi_init_debugfs(void)
 	int lvl, i;
 
 	stsi_root = debugfs_create_dir("stsi", arch_debugfs_dir);
-	if (IS_ERR_OR_NULL(stsi_root))
-		return 0;
 	lvl = stsi(NULL, 0, 0, 0);
 	if (lvl > 0)
 		stsi_0_0_0 = lvl;

arch/s390/kernel/vtime.c

@@ -69,7 +69,7 @@ static void update_mt_scaling(void)
 	u64 delta, fac, mult, div;
 	int i;
 
-	stcctm5(smp_cpu_mtid + 1, cycles_new);
+	stcctm(MT_DIAG, smp_cpu_mtid + 1, cycles_new);
 	cycles_old = this_cpu_ptr(mt_cycles);
 	fac = 1;
 	mult = div = 0;
@@ -432,6 +432,6 @@ void vtime_init(void)
 		__this_cpu_write(mt_scaling_jiffies, jiffies);
 		__this_cpu_write(mt_scaling_mult, 1);
 		__this_cpu_write(mt_scaling_div, 1);
-		stcctm5(smp_cpu_mtid + 1, this_cpu_ptr(mt_cycles));
+		stcctm(MT_DIAG, smp_cpu_mtid + 1, this_cpu_ptr(mt_cycles));
 	}
 }

arch/s390/lib/string.c

@@ -43,11 +43,13 @@ static inline char *__strnend(const char *s, size_t n)
  *
  * returns the length of @s
  */
+#ifdef __HAVE_ARCH_STRLEN
 size_t strlen(const char *s)
 {
 	return __strend(s) - s;
 }
 EXPORT_SYMBOL(strlen);
+#endif
 
 /**
  * strnlen - Find the length of a length-limited string
@@ -56,11 +58,13 @@ EXPORT_SYMBOL(strlen);
  *
  * returns the minimum of the length of @s and @n
  */
+#ifdef __HAVE_ARCH_STRNLEN
 size_t strnlen(const char *s, size_t n)
 {
 	return __strnend(s, n) - s;
 }
 EXPORT_SYMBOL(strnlen);
+#endif
 
 /**
  * strcpy - Copy a %NUL terminated string
@@ -69,6 +73,7 @@ EXPORT_SYMBOL(strnlen);
  *
  * returns a pointer to @dest
  */
+#ifdef __HAVE_ARCH_STRCPY
 char *strcpy(char *dest, const char *src)
 {
 	register int r0 asm("0") = 0;
@@ -81,6 +86,7 @@ char *strcpy(char *dest, const char *src)
 	return ret;
 }
 EXPORT_SYMBOL(strcpy);
+#endif
 
 /**
  * strlcpy - Copy a %NUL terminated string into a sized buffer
@@ -93,6 +99,7 @@ EXPORT_SYMBOL(strcpy);
  * of course, the buffer size is zero). It does not pad
  * out the result like strncpy() does.
  */
+#ifdef __HAVE_ARCH_STRLCPY
 size_t strlcpy(char *dest, const char *src, size_t size)
 {
 	size_t ret = __strend(src) - src;
@@ -105,6 +112,7 @@ size_t strlcpy(char *dest, const char *src, size_t size)
 	return ret;
 }
 EXPORT_SYMBOL(strlcpy);
+#endif
 
 /**
  * strncpy - Copy a length-limited, %NUL-terminated string
@@ -115,6 +123,7 @@ EXPORT_SYMBOL(strlcpy);
  * The result is not %NUL-terminated if the source exceeds
  * @n bytes.
  */
+#ifdef __HAVE_ARCH_STRNCPY
 char *strncpy(char *dest, const char *src, size_t n)
 {
 	size_t len = __strnend(src, n) - src;
@@ -123,6 +132,7 @@ char *strncpy(char *dest, const char *src, size_t n)
 	return dest;
 }
 EXPORT_SYMBOL(strncpy);
+#endif
 
 /**
  * strcat - Append one %NUL-terminated string to another
@@ -131,6 +141,7 @@ EXPORT_SYMBOL(strncpy);
  *
  * returns a pointer to @dest
  */
+#ifdef __HAVE_ARCH_STRCAT
 char *strcat(char *dest, const char *src)
 {
 	register int r0 asm("0") = 0;
@@ -146,6 +157,7 @@ char *strcat(char *dest, const char *src)
 	return ret;
 }
 EXPORT_SYMBOL(strcat);
+#endif
 
 /**
  * strlcat - Append a length-limited, %NUL-terminated string to another
@@ -153,6 +165,7 @@ EXPORT_SYMBOL(strcat);
  * @src: The string to append to it
  * @n: The size of the destination buffer.
  */
+#ifdef __HAVE_ARCH_STRLCAT
 size_t strlcat(char *dest, const char *src, size_t n)
 {
 	size_t dsize = __strend(dest) - dest;
@@ -170,6 +183,7 @@ size_t strlcat(char *dest, const char *src, size_t n)
 	return res;
 }
 EXPORT_SYMBOL(strlcat);
+#endif
 
 /**
  * strncat - Append a length-limited, %NUL-terminated string to another
@@ -182,6 +196,7 @@ EXPORT_SYMBOL(strlcat);
  * Note that in contrast to strncpy, strncat ensures the result is
  * terminated.
  */
+#ifdef __HAVE_ARCH_STRNCAT
 char *strncat(char *dest, const char *src, size_t n)
 {
 	size_t len = __strnend(src, n) - src;
@@ -192,6 +207,7 @@ char *strncat(char *dest, const char *src, size_t n)
 	return dest;
 }
 EXPORT_SYMBOL(strncat);
+#endif
 
 /**
  * strcmp - Compare two strings
@@ -202,6 +218,7 @@ EXPORT_SYMBOL(strncat);
  *	   < 0 if @s1 is less than @s2
  *	   > 0 if @s1 is greater than @s2
  */
+#ifdef __HAVE_ARCH_STRCMP
 int strcmp(const char *s1, const char *s2)
 {
 	register int r0 asm("0") = 0;
@@ -219,12 +236,14 @@ int strcmp(const char *s1, const char *s2)
 	return ret;
 }
 EXPORT_SYMBOL(strcmp);
+#endif
 
 /**
  * strrchr - Find the last occurrence of a character in a string
  * @s: The string to be searched
  * @c: The character to search for
  */
+#ifdef __HAVE_ARCH_STRRCHR
 char *strrchr(const char *s, int c)
 {
        size_t len = __strend(s) - s;
@@ -237,6 +256,7 @@ char *strrchr(const char *s, int c)
        return NULL;
 }
 EXPORT_SYMBOL(strrchr);
+#endif
 
 static inline int clcle(const char *s1, unsigned long l1,
 			const char *s2, unsigned long l2)
@@ -261,6 +281,7 @@ static inline int clcle(const char *s1, unsigned long l1,
  * @s1: The string to be searched
  * @s2: The string to search for
  */
+#ifdef __HAVE_ARCH_STRSTR
 char *strstr(const char *s1, const char *s2)
 {
 	int l1, l2;
@@ -280,6 +301,7 @@ char *strstr(const char *s1, const char *s2)
 	return NULL;
 }
 EXPORT_SYMBOL(strstr);
+#endif
 
 /**
  * memchr - Find a character in an area of memory.
@@ -290,6 +312,7 @@ EXPORT_SYMBOL(strstr);
  * returns the address of the first occurrence of @c, or %NULL
  * if @c is not found
  */
+#ifdef __HAVE_ARCH_MEMCHR
 void *memchr(const void *s, int c, size_t n)
 {
 	register int r0 asm("0") = (char) c;
@@ -304,6 +327,7 @@ void *memchr(const void *s, int c, size_t n)
 	return (void *) ret;
 }
 EXPORT_SYMBOL(memchr);
+#endif
 
 /**
  * memcmp - Compare two areas of memory
@@ -311,6 +335,7 @@ EXPORT_SYMBOL(memchr);
  * @s2: Another area of memory
  * @count: The size of the area.
  */
+#ifdef __HAVE_ARCH_MEMCMP
 int memcmp(const void *s1, const void *s2, size_t n)
 {
 	int ret;
@@ -321,6 +346,7 @@ int memcmp(const void *s1, const void *s2, size_t n)
 	return ret;
 }
 EXPORT_SYMBOL(memcmp);
+#endif
 
 /**
  * memscan - Find a character in an area of memory.
@@ -331,6 +357,7 @@ EXPORT_SYMBOL(memcmp);
  * returns the address of the first occurrence of @c, or 1 byte past
  * the area if @c is not found
  */
+#ifdef __HAVE_ARCH_MEMSCAN
 void *memscan(void *s, int c, size_t n)
 {
 	register int r0 asm("0") = (char) c;
@@ -342,3 +369,4 @@ void *memscan(void *s, int c, size_t n)
 	return (void *) ret;
 }
 EXPORT_SYMBOL(memscan);
+#endif

arch/s390/mm/extmem.c

@@ -28,12 +28,7 @@
 #include <asm/cpcmd.h>
 #include <asm/setup.h>
 
-#define DCSS_LOADSHR    0x00
-#define DCSS_LOADNSR    0x04
 #define DCSS_PURGESEG   0x08
-#define DCSS_FINDSEG    0x0c
-#define DCSS_LOADNOLY   0x10
-#define DCSS_SEGEXT     0x18
 #define DCSS_LOADSHRX	0x20
 #define DCSS_LOADNSRX	0x24
 #define DCSS_FINDSEGX	0x2c
@@ -53,20 +48,6 @@ struct qout64 {
 	struct qrange range[6];
 };
 
-struct qrange_old {
-	unsigned int start; /* last byte type */
-	unsigned int end;   /* last byte reserved */
-};
-
-/* output area format for the Diag x'64' old subcode x'18' */
-struct qout64_old {
-	int segstart;
-	int segend;
-	int segcnt;
-	int segrcnt;
-	struct qrange_old range[6];
-};
-
 struct qin64 {
 	char qopcode;
 	char rsrv1[3];
@@ -95,52 +76,10 @@ static DEFINE_MUTEX(dcss_lock);
 static LIST_HEAD(dcss_list);
 static char *segtype_string[] = { "SW", "EW", "SR", "ER", "SN", "EN", "SC",
 					"EW/EN-MIXED" };
-static int loadshr_scode, loadnsr_scode;
+static int loadshr_scode = DCSS_LOADSHRX;
-static int segext_scode, purgeseg_scode;
+static int loadnsr_scode = DCSS_LOADNSRX;
-static int scode_set;
+static int purgeseg_scode = DCSS_PURGESEG;
-
+static int segext_scode = DCSS_SEGEXTX;
-/* set correct Diag x'64' subcodes. */
-static int
-dcss_set_subcodes(void)
-{
-	char *name = kmalloc(8, GFP_KERNEL | GFP_DMA);
-	unsigned long rx, ry;
-	int rc;
-
-	if (name == NULL)
-		return -ENOMEM;
-
-	rx = (unsigned long) name;
-	ry = DCSS_FINDSEGX;
-
-	strcpy(name, "dummy");
-	diag_stat_inc(DIAG_STAT_X064);
-	asm volatile(
-		"	diag	%0,%1,0x64\n"
-		"0:	ipm	%2\n"
-		"	srl	%2,28\n"
-		"	j	2f\n"
-		"1:	la	%2,3\n"
-		"2:\n"
-		EX_TABLE(0b, 1b)
-		: "+d" (rx), "+d" (ry), "=d" (rc) : : "cc", "memory");
-
-	kfree(name);
-	/* Diag x'64' new subcodes are supported, set to new subcodes */
-	if (rc != 3) {
-		loadshr_scode = DCSS_LOADSHRX;
-		loadnsr_scode = DCSS_LOADNSRX;
-		purgeseg_scode = DCSS_PURGESEG;
-		segext_scode = DCSS_SEGEXTX;
-		return 0;
-	}
-	/* Diag x'64' new subcodes are not supported, set to old subcodes */
-	loadshr_scode = DCSS_LOADNOLY;
-	loadnsr_scode = DCSS_LOADNSR;
-	purgeseg_scode = DCSS_PURGESEG;
-	segext_scode = DCSS_SEGEXT;
-	return 0;
-}
 
 /*
  * Create the 8 bytes, ebcdic VM segment name from
@@ -196,32 +135,15 @@ dcss_diag(int *func, void *parameter,
 	unsigned long rx, ry;
 	int rc;
 
-	if (scode_set == 0) {
-		rc = dcss_set_subcodes();
-		if (rc < 0)
-			return rc;
-		scode_set = 1;
-	}
 	rx = (unsigned long) parameter;
 	ry = (unsigned long) *func;
 
-	/* 64-bit Diag x'64' new subcode, keep in 64-bit addressing mode */
 	diag_stat_inc(DIAG_STAT_X064);
-	if (*func > DCSS_SEGEXT)
+	asm volatile(
-		asm volatile(
+		"	diag	%0,%1,0x64\n"
-			"	diag	%0,%1,0x64\n"
+		"	ipm	%2\n"
-			"	ipm	%2\n"
+		"	srl	%2,28\n"
-			"	srl	%2,28\n"
+		: "+d" (rx), "+d" (ry), "=d" (rc) : : "cc");
-			: "+d" (rx), "+d" (ry), "=d" (rc) : : "cc");
-	/* 31-bit Diag x'64' old subcode, switch to 31-bit addressing mode */
-	else
-		asm volatile(
-			"	sam31\n"
-			"	diag	%0,%1,0x64\n"
-			"	sam64\n"
-			"	ipm	%2\n"
-			"	srl	%2,28\n"
-			: "+d" (rx), "+d" (ry), "=d" (rc) : : "cc");
 	*ret1 = rx;
 	*ret2 = ry;
 	return rc;
@@ -271,31 +193,6 @@ query_segment_type (struct dcss_segment *seg)
 		goto out_free;
 	}
 
-	/* Only old format of output area of Diagnose x'64' is supported,
-	   copy data for the new format. */
-	if (segext_scode == DCSS_SEGEXT) {
-		struct qout64_old *qout_old;
-		qout_old = kzalloc(sizeof(*qout_old), GFP_KERNEL | GFP_DMA);
-		if (qout_old == NULL) {
-			rc = -ENOMEM;
-			goto out_free;
-		}
-		memcpy(qout_old, qout, sizeof(struct qout64_old));
-		qout->segstart = (unsigned long) qout_old->segstart;
-		qout->segend = (unsigned long) qout_old->segend;
-		qout->segcnt = qout_old->segcnt;
-		qout->segrcnt = qout_old->segrcnt;
-
-		if (qout->segcnt > 6)
-			qout->segrcnt = 6;
-		for (i = 0; i < qout->segrcnt; i++) {
-			qout->range[i].start =
-				(unsigned long) qout_old->range[i].start;
-			qout->range[i].end =
-				(unsigned long) qout_old->range[i].end;
-		}
-		kfree(qout_old);
-	}
 	if (qout->segcnt > 6) {
 		rc = -EOPNOTSUPP;
 		goto out_free;
@@ -410,11 +307,9 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
 	if (rc < 0)
 		goto out_free;
 
-	if (loadshr_scode == DCSS_LOADSHRX) {
+	if (segment_overlaps_others(seg)) {
-		if (segment_overlaps_others(seg)) {
+		rc = -EBUSY;
-			rc = -EBUSY;
+		goto out_free;
-			goto out_free;
-		}
 	}
 
 	rc = vmem_add_mapping(seg->start_addr, seg->end - seg->start_addr + 1);
@@ -472,11 +367,11 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
 	*addr = seg->start_addr;
 	*end  = seg->end;
 	if (do_nonshared)
-		pr_info("DCSS %s of range %p to %p and type %s loaded as "
+		pr_info("DCSS %s of range %px to %px and type %s loaded as "
 			"exclusive-writable\n", name, (void*) seg->start_addr,
 			(void*) seg->end, segtype_string[seg->vm_segtype]);
 	else {
-		pr_info("DCSS %s of range %p to %p and type %s loaded in "
+		pr_info("DCSS %s of range %px to %px and type %s loaded in "
 			"shared access mode\n", name, (void*) seg->start_addr,
 			(void*) seg->end, segtype_string[seg->vm_segtype]);
 	}

arch/s390/mm/kasan_init.c

@@ -226,8 +226,6 @@ static void __init kasan_enable_dat(void)
 
 static void __init kasan_early_detect_facilities(void)
 {
-	__stfle(S390_lowcore.stfle_fac_list,
-		ARRAY_SIZE(S390_lowcore.stfle_fac_list));
 	if (test_facility(8)) {
 		has_edat = true;
 		__ctl_set_bit(0, 23);

arch/s390/mm/mmap.c

@@ -29,14 +29,6 @@ static unsigned long stack_maxrandom_size(void)
 	return STACK_RND_MASK << PAGE_SHIFT;
 }
 
-/*
- * Top of mmap area (just below the process stack).
- *
- * Leave at least a ~32 MB hole.
- */
-#define MIN_GAP (32*1024*1024)
-#define MAX_GAP (STACK_TOP/6*5)
-
 static inline int mmap_is_legacy(struct rlimit *rlim_stack)
 {
 	if (current->personality & ADDR_COMPAT_LAYOUT)
@@ -60,13 +52,26 @@ static inline unsigned long mmap_base(unsigned long rnd,
 				      struct rlimit *rlim_stack)
 {
 	unsigned long gap = rlim_stack->rlim_cur;
+	unsigned long pad = stack_maxrandom_size() + stack_guard_gap;
+	unsigned long gap_min, gap_max;
 
-	if (gap < MIN_GAP)
+	/* Values close to RLIM_INFINITY can overflow. */
-		gap = MIN_GAP;
+	if (gap + pad > gap)
-	else if (gap > MAX_GAP)
+		gap += pad;
-		gap = MAX_GAP;
+
-	gap &= PAGE_MASK;
+	/*
-	return STACK_TOP - stack_maxrandom_size() - rnd - gap;
+	 * Top of mmap area (just below the process stack).
+	 * Leave at least a ~32 MB hole.
+	 */
+	gap_min = 32 * 1024 * 1024UL;
+	gap_max = (STACK_TOP / 6) * 5;
+
+	if (gap < gap_min)
+		gap = gap_min;
+	else if (gap > gap_max)
+		gap = gap_max;
+
+	return PAGE_ALIGN(STACK_TOP - gap - rnd);
 }
 
 unsigned long

arch/s390/mm/pgtable.c

@@ -318,7 +318,6 @@ pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr,
 	}
 	return old;
 }
-EXPORT_SYMBOL(ptep_modify_prot_start);
 
 void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
 			     pte_t *ptep, pte_t pte)
@@ -337,7 +336,6 @@ void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
 	}
 	preempt_enable();
 }
-EXPORT_SYMBOL(ptep_modify_prot_commit);
 
 static inline void pmdp_idte_local(struct mm_struct *mm,
 				   unsigned long addr, pmd_t *pmdp)

arch/s390/pci/pci.c

@@ -285,7 +285,7 @@ void __iomem *pci_iomap_range(struct pci_dev *pdev,
 	struct zpci_dev *zdev =	to_zpci(pdev);
 	int idx;
 
-	if (!pci_resource_len(pdev, bar))
+	if (!pci_resource_len(pdev, bar) || bar >= PCI_BAR_COUNT)
 		return NULL;
 
 	idx = zdev->bars[bar].map_idx;
@@ -484,6 +484,15 @@ void arch_teardown_msi_irqs(struct pci_dev *pdev)
 	}
 }
 
+#ifdef CONFIG_PCI_IOV
+static struct resource iov_res = {
+	.name	= "PCI IOV res",
+	.start	= 0,
+	.end	= -1,
+	.flags	= IORESOURCE_MEM,
+};
+#endif
+
 static void zpci_map_resources(struct pci_dev *pdev)
 {
 	resource_size_t len;
@@ -497,6 +506,17 @@ static void zpci_map_resources(struct pci_dev *pdev)
 			(resource_size_t __force) pci_iomap(pdev, i, 0);
 		pdev->resource[i].end = pdev->resource[i].start + len - 1;
 	}
+
+#ifdef CONFIG_PCI_IOV
+	i = PCI_IOV_RESOURCES;
+
+	for (; i < PCI_SRIOV_NUM_BARS + PCI_IOV_RESOURCES; i++) {
+		len = pci_resource_len(pdev, i);
+		if (!len)
+			continue;
+		pdev->resource[i].parent = &iov_res;
+	}
+#endif
 }
 
 static void zpci_unmap_resources(struct pci_dev *pdev)

arch/s390/pci/pci_debug.c

@@ -172,21 +172,14 @@ static const struct file_operations debugfs_pci_perf_fops = {
 void zpci_debug_init_device(struct zpci_dev *zdev, const char *name)
 {
 	zdev->debugfs_dev = debugfs_create_dir(name, debugfs_root);
-	if (IS_ERR(zdev->debugfs_dev))
-		zdev->debugfs_dev = NULL;
 
-	zdev->debugfs_perf = debugfs_create_file("statistics",
+	debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR,
-				S_IFREG | S_IRUGO | S_IWUSR,
+			    zdev->debugfs_dev, zdev, &debugfs_pci_perf_fops);
-				zdev->debugfs_dev, zdev,
-				&debugfs_pci_perf_fops);
-	if (IS_ERR(zdev->debugfs_perf))
-		zdev->debugfs_perf = NULL;
 }
 
 void zpci_debug_exit_device(struct zpci_dev *zdev)
 {
-	debugfs_remove(zdev->debugfs_perf);
+	debugfs_remove_recursive(zdev->debugfs_dev);
-	debugfs_remove(zdev->debugfs_dev);
 }
 
 int __init zpci_debug_init(void)

drivers/s390/block/dasd.c

@@ -3965,13 +3965,11 @@ int dasd_generic_restore_device(struct ccw_device *cdev)
 EXPORT_SYMBOL_GPL(dasd_generic_restore_device);
 
 static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
-						   void *rdc_buffer,
 						   int rdc_buffer_size,
 						   int magic)
 {
 	struct dasd_ccw_req *cqr;
 	struct ccw1 *ccw;
-	unsigned long *idaw;
 
 	cqr = dasd_smalloc_request(magic, 1 /* RDC */, rdc_buffer_size, device,
 				   NULL);
@@ -3986,16 +3984,8 @@ static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
 
 	ccw = cqr->cpaddr;
 	ccw->cmd_code = CCW_CMD_RDC;
-	if (idal_is_needed(rdc_buffer, rdc_buffer_size)) {
+	ccw->cda = (__u32)(addr_t) cqr->data;
-		idaw = (unsigned long *) (cqr->data);
+	ccw->flags = 0;
-		ccw->cda = (__u32)(addr_t) idaw;
-		ccw->flags = CCW_FLAG_IDA;
-		idaw = idal_create_words(idaw, rdc_buffer, rdc_buffer_size);
-	} else {
-		ccw->cda = (__u32)(addr_t) rdc_buffer;
-		ccw->flags = 0;
-	}
-
 	ccw->count = rdc_buffer_size;
 	cqr->startdev = device;
 	cqr->memdev = device;
@@ -4013,12 +4003,13 @@ int dasd_generic_read_dev_chars(struct dasd_device *device, int magic,
 	int ret;
 	struct dasd_ccw_req *cqr;
 
-	cqr = dasd_generic_build_rdc(device, rdc_buffer, rdc_buffer_size,
+	cqr = dasd_generic_build_rdc(device, rdc_buffer_size, magic);
-				     magic);
 	if (IS_ERR(cqr))
 		return PTR_ERR(cqr);
 
 	ret = dasd_sleep_on(cqr);
+	if (ret == 0)
+		memcpy(rdc_buffer, cqr->data, rdc_buffer_size);
 	dasd_sfree_request(cqr, cqr->memdev);
 	return ret;
 }

drivers/s390/char/sclp.h

@@ -195,7 +195,9 @@ struct read_info_sccb {
 	u16	hcpua;			/* 120-121 */
 	u8	_pad_122[124 - 122];	/* 122-123 */
 	u32	hmfai;			/* 124-127 */
-	u8	_pad_128[4096 - 128];	/* 128-4095 */
+	u8	_pad_128[134 - 128];	/* 128-133 */
+	u8	byte_134;			/* 134 */
+	u8	_pad_135[4096 - 135];	/* 135-4095 */
 } __packed __aligned(PAGE_SIZE);
 
 struct read_storage_sccb {

drivers/s390/char/sclp_early.c

@@ -44,6 +44,8 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
 		S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
 	if (sccb->fac91 & 0x40)
 		S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_GUEST;
+	if (sccb->cpuoff > 134)
+		sclp.has_diag318 = !!(sccb->byte_134 & 0x80);
 	sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
 	sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
 	sclp.rzm <<= 20;

drivers/s390/cio/qdio_setup.c

@@ -181,7 +181,7 @@ static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
 }
 
 static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
-				void **sbals_array, int i)
+				struct qdio_buffer **sbals_array, int i)
 {
 	struct qdio_q *prev;
 	int j;
@@ -212,8 +212,8 @@ static void setup_queues(struct qdio_irq *irq_ptr,
 			 struct qdio_initialize *qdio_init)
 {
 	struct qdio_q *q;
-	void **input_sbal_array = qdio_init->input_sbal_addr_array;
+	struct qdio_buffer **input_sbal_array = qdio_init->input_sbal_addr_array;
-	void **output_sbal_array = qdio_init->output_sbal_addr_array;
+	struct qdio_buffer **output_sbal_array = qdio_init->output_sbal_addr_array;
 	struct qdio_outbuf_state *output_sbal_state_array =
 				  qdio_init->output_sbal_state_array;
 	int i;

drivers/s390/cio/vfio_ccw_cp.c

@@ -283,6 +283,33 @@ static long copy_ccw_from_iova(struct channel_program *cp,
 
 #define ccw_is_chain(_ccw) ((_ccw)->flags & (CCW_FLAG_CC | CCW_FLAG_DC))
 
+/*
+ * is_cpa_within_range()
+ *
+ * @cpa: channel program address being questioned
+ * @head: address of the beginning of a CCW chain
+ * @len: number of CCWs within the chain
+ *
+ * Determine whether the address of a CCW (whether a new chain,
+ * or the target of a TIC) falls within a range (including the end points).
+ *
+ * Returns 1 if yes, 0 if no.
+ */
+static inline int is_cpa_within_range(u32 cpa, u32 head, int len)
+{
+	u32 tail = head + (len - 1) * sizeof(struct ccw1);
+
+	return (head <= cpa && cpa <= tail);
+}
+
+static inline int is_tic_within_range(struct ccw1 *ccw, u32 head, int len)
+{
+	if (!ccw_is_tic(ccw))
+		return 0;
+
+	return is_cpa_within_range(ccw->cda, head, len);
+}
+
 static struct ccwchain *ccwchain_alloc(struct channel_program *cp, int len)
 {
 	struct ccwchain *chain;
@@ -392,7 +419,15 @@ static int ccwchain_calc_length(u64 iova, struct channel_program *cp)
 			return -EOPNOTSUPP;
 		}
 
-		if ((!ccw_is_chain(ccw)) && (!ccw_is_tic(ccw)))
+		/*
+		 * We want to keep counting if the current CCW has the
+		 * command-chaining flag enabled, or if it is a TIC CCW
+		 * that loops back into the current chain.  The latter
+		 * is used for device orientation, where the CCW PRIOR to
+		 * the TIC can either jump to the TIC or a CCW immediately
+		 * after the TIC, depending on the results of its operation.
+		 */
+		if (!ccw_is_chain(ccw) && !is_tic_within_range(ccw, iova, cnt))
 			break;
 
 		ccw++;
@@ -408,13 +443,11 @@ static int ccwchain_calc_length(u64 iova, struct channel_program *cp)
 static int tic_target_chain_exists(struct ccw1 *tic, struct channel_program *cp)
 {
 	struct ccwchain *chain;
-	u32 ccw_head, ccw_tail;
+	u32 ccw_head;
 
 	list_for_each_entry(chain, &cp->ccwchain_list, next) {
 		ccw_head = chain->ch_iova;
-		ccw_tail = ccw_head + (chain->ch_len - 1) * sizeof(struct ccw1);
+		if (is_cpa_within_range(tic->cda, ccw_head, chain->ch_len))
-
-		if ((ccw_head <= tic->cda) && (tic->cda <= ccw_tail))
 			return 1;
 	}
 
@@ -481,13 +514,11 @@ static int ccwchain_fetch_tic(struct ccwchain *chain,
 {
 	struct ccw1 *ccw = chain->ch_ccw + idx;
 	struct ccwchain *iter;
-	u32 ccw_head, ccw_tail;
+	u32 ccw_head;
 
 	list_for_each_entry(iter, &cp->ccwchain_list, next) {
 		ccw_head = iter->ch_iova;
-		ccw_tail = ccw_head + (iter->ch_len - 1) * sizeof(struct ccw1);
+		if (is_cpa_within_range(ccw->cda, ccw_head, iter->ch_len)) {
-
-		if ((ccw_head <= ccw->cda) && (ccw->cda <= ccw_tail)) {
 			ccw->cda = (__u32) (addr_t) (((char *)iter->ch_ccw) +
 						     (ccw->cda - ccw_head));
 			return 0;
@@ -829,7 +860,7 @@ void cp_update_scsw(struct channel_program *cp, union scsw *scsw)
 {
 	struct ccwchain *chain;
 	u32 cpa = scsw->cmd.cpa;
-	u32 ccw_head, ccw_tail;
+	u32 ccw_head;
 
 	/*
 	 * LATER:
@@ -839,9 +870,7 @@ void cp_update_scsw(struct channel_program *cp, union scsw *scsw)
 	 */
 	list_for_each_entry(chain, &cp->ccwchain_list, next) {
 		ccw_head = (u32)(u64)chain->ch_ccw;
-		ccw_tail = (u32)(u64)(chain->ch_ccw + chain->ch_len - 1);
+		if (is_cpa_within_range(cpa, ccw_head, chain->ch_len)) {
-
-		if ((ccw_head <= cpa) && (cpa <= ccw_tail)) {
 			/*
 			 * (cpa - ccw_head) is the offset value of the host
 			 * physical ccw to its chain head.

drivers/s390/crypto/ap_bus.c

@@ -1335,6 +1335,16 @@ static int __match_queue_device_with_qid(struct device *dev, void *data)
 	return is_queue_dev(dev) && to_ap_queue(dev)->qid == (int)(long) data;
 }
 
+/*
+ * Helper function to be used with bus_find_dev
+ * matches any queue device with given queue id
+ */
+static int __match_queue_device_with_queue_id(struct device *dev, void *data)
+{
+	return is_queue_dev(dev)
+		&& AP_QID_QUEUE(to_ap_queue(dev)->qid) == (int)(long) data;
+}
+
 /*
  * Helper function for ap_scan_bus().
  * Does the scan bus job for the given adapter id.
@@ -1435,8 +1445,13 @@ static void _ap_scan_bus_adapter(int id)
 				borked = aq->state == AP_STATE_BORKED;
 				spin_unlock_bh(&aq->lock);
 			}
-			if (borked)	/* Remove broken device */
+			if (borked) {
+				/* Remove broken device */
+				AP_DBF(DBF_DEBUG,
+				       "removing broken queue=%02x.%04x\n",
+				       id, dom);
 				device_unregister(dev);
+			}
 			put_device(dev);
 			continue;
 		}
@@ -1506,7 +1521,7 @@ static void ap_scan_bus(struct work_struct *unused)
 		struct device *dev =
 			bus_find_device(&ap_bus_type, NULL,
 					(void *)(long) ap_domain_index,
-					__match_queue_device_with_qid);
+					__match_queue_device_with_queue_id);
 		if (dev)
 			put_device(dev);
 		else

drivers/s390/crypto/ap_bus.h

@@ -91,7 +91,8 @@ enum ap_state {
 	AP_STATE_WORKING,
 	AP_STATE_QUEUE_FULL,
 	AP_STATE_SUSPEND_WAIT,
-	AP_STATE_BORKED,
+	AP_STATE_UNBOUND,	/* momentary not bound to a driver */
+	AP_STATE_BORKED,	/* broken */
 	NR_AP_STATES
 };
 

drivers/s390/crypto/ap_queue.c

@@ -420,6 +420,10 @@ static ap_func_t *ap_jumptable[NR_AP_STATES][NR_AP_EVENTS] = {
 		[AP_EVENT_POLL] = ap_sm_suspend_read,
 		[AP_EVENT_TIMEOUT] = ap_sm_nop,
 	},
+	[AP_STATE_UNBOUND] = {
+		[AP_EVENT_POLL] = ap_sm_nop,
+		[AP_EVENT_TIMEOUT] = ap_sm_nop,
+	},
 	[AP_STATE_BORKED] = {
 		[AP_EVENT_POLL] = ap_sm_nop,
 		[AP_EVENT_TIMEOUT] = ap_sm_nop,
@@ -725,6 +729,7 @@ static void __ap_flush_queue(struct ap_queue *aq)
 		ap_msg->rc = -EAGAIN;
 		ap_msg->receive(aq, ap_msg, NULL);
 	}
+	aq->queue_count = 0;
 }
 
 void ap_flush_queue(struct ap_queue *aq)
@@ -743,7 +748,7 @@ void ap_queue_remove(struct ap_queue *aq)
 	/* reset with zero, also clears irq registration */
 	spin_lock_bh(&aq->lock);
 	ap_zapq(aq->qid);
-	aq->state = AP_STATE_BORKED;
+	aq->state = AP_STATE_UNBOUND;
 	spin_unlock_bh(&aq->lock);
 }
 EXPORT_SYMBOL(ap_queue_remove);

drivers/s390/crypto/pkey_api.c

@@ -1079,7 +1079,7 @@ int pkey_verifykey(const struct pkey_seckey *seckey,
 	rc = mkvp_cache_fetch(cardnr, domain, mkvp);
 	if (rc)
 		goto out;
-	if (t->mkvp == mkvp[1]) {
+	if (t->mkvp == mkvp[1] && t->mkvp != mkvp[0]) {
 		DEBUG_DBG("%s secure key has old mkvp\n", __func__);
 		if (pattributes)
 			*pattributes |= PKEY_VERIFY_ATTR_OLD_MKVP;

drivers/s390/crypto/vfio_ap_drv.c

@@ -15,7 +15,6 @@
 #include "vfio_ap_private.h"
 
 #define VFIO_AP_ROOT_NAME "vfio_ap"
-#define VFIO_AP_DEV_TYPE_NAME "ap_matrix"
 #define VFIO_AP_DEV_NAME "matrix"
 
 MODULE_AUTHOR("IBM Corporation");
@@ -24,10 +23,6 @@ MODULE_LICENSE("GPL v2");
 
 static struct ap_driver vfio_ap_drv;
 
-static struct device_type vfio_ap_dev_type = {
-	.name = VFIO_AP_DEV_TYPE_NAME,
-};
-
 struct ap_matrix_dev *matrix_dev;
 
 /* Only type 10 adapters (CEX4 and later) are supported
@@ -62,6 +57,22 @@ static void vfio_ap_matrix_dev_release(struct device *dev)
 	kfree(matrix_dev);
 }
 
+static int matrix_bus_match(struct device *dev, struct device_driver *drv)
+{
+	return 1;
+}
+
+static struct bus_type matrix_bus = {
+	.name = "matrix",
+	.match = &matrix_bus_match,
+};
+
+static struct device_driver matrix_driver = {
+	.name = "vfio_ap",
+	.bus = &matrix_bus,
+	.suppress_bind_attrs = true,
+};
+
 static int vfio_ap_matrix_dev_create(void)
 {
 	int ret;
@@ -71,6 +82,10 @@ static int vfio_ap_matrix_dev_create(void)
 	if (IS_ERR(root_device))
 		return PTR_ERR(root_device);
 
+	ret = bus_register(&matrix_bus);
+	if (ret)
+		goto bus_register_err;
+
 	matrix_dev = kzalloc(sizeof(*matrix_dev), GFP_KERNEL);
 	if (!matrix_dev) {
 		ret = -ENOMEM;
@@ -87,30 +102,41 @@ static int vfio_ap_matrix_dev_create(void)
 	mutex_init(&matrix_dev->lock);
 	INIT_LIST_HEAD(&matrix_dev->mdev_list);
 
-	matrix_dev->device.type = &vfio_ap_dev_type;
 	dev_set_name(&matrix_dev->device, "%s", VFIO_AP_DEV_NAME);
 	matrix_dev->device.parent = root_device;
+	matrix_dev->device.bus = &matrix_bus;
 	matrix_dev->device.release = vfio_ap_matrix_dev_release;
-	matrix_dev->device.driver = &vfio_ap_drv.driver;
+	matrix_dev->vfio_ap_drv = &vfio_ap_drv;
 
 	ret = device_register(&matrix_dev->device);
 	if (ret)
 		goto matrix_reg_err;
 
+	ret = driver_register(&matrix_driver);
+	if (ret)
+		goto matrix_drv_err;
+
 	return 0;
 
+matrix_drv_err:
+	device_unregister(&matrix_dev->device);
 matrix_reg_err:
 	put_device(&matrix_dev->device);
 matrix_alloc_err:
+	bus_unregister(&matrix_bus);
+bus_register_err:
 	root_device_unregister(root_device);
-
 	return ret;
 }
 
 static void vfio_ap_matrix_dev_destroy(void)
 {
+	struct device *root_device = matrix_dev->device.parent;
+
+	driver_unregister(&matrix_driver);
 	device_unregister(&matrix_dev->device);
-	root_device_unregister(matrix_dev->device.parent);
+	bus_unregister(&matrix_bus);
+	root_device_unregister(root_device);
 }
 
 static int __init vfio_ap_init(void)

drivers/s390/crypto/vfio_ap_ops.c

@@ -198,8 +198,8 @@ static int vfio_ap_verify_queue_reserved(unsigned long *apid,
 	qres.apqi = apqi;
 	qres.reserved = false;
 
-	ret = driver_for_each_device(matrix_dev->device.driver, NULL, &qres,
+	ret = driver_for_each_device(&matrix_dev->vfio_ap_drv->driver, NULL,
-				     vfio_ap_has_queue);
+				     &qres, vfio_ap_has_queue);
 	if (ret)
 		return ret;
 

drivers/s390/crypto/vfio_ap_private.h

@@ -40,6 +40,7 @@ struct ap_matrix_dev {
 	struct ap_config_info info;
 	struct list_head mdev_list;
 	struct mutex lock;
+	struct ap_driver  *vfio_ap_drv;
 };
 
 extern struct ap_matrix_dev *matrix_dev;

drivers/s390/net/ism_drv.c

@@ -141,10 +141,13 @@ static int register_ieq(struct ism_dev *ism)
 
 static int unregister_sba(struct ism_dev *ism)
 {
+	int ret;
+
 	if (!ism->sba)
 		return 0;
 
-	if (ism_cmd_simple(ism, ISM_UNREG_SBA))
+	ret = ism_cmd_simple(ism, ISM_UNREG_SBA);
+	if (ret && ret != ISM_ERROR)
 		return -EIO;
 
 	dma_free_coherent(&ism->pdev->dev, PAGE_SIZE,
@@ -158,10 +161,13 @@ static int unregister_sba(struct ism_dev *ism)
 
 static int unregister_ieq(struct ism_dev *ism)
 {
+	int ret;
+
 	if (!ism->ieq)
 		return 0;
 
-	if (ism_cmd_simple(ism, ISM_UNREG_IEQ))
+	ret = ism_cmd_simple(ism, ISM_UNREG_IEQ);
+	if (ret && ret != ISM_ERROR)
 		return -EIO;
 
 	dma_free_coherent(&ism->pdev->dev, PAGE_SIZE,
@@ -287,7 +293,7 @@ static int ism_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
 	cmd.request.dmb_tok = dmb->dmb_tok;
 
 	ret = ism_cmd(ism, &cmd);
-	if (ret)
+	if (ret && ret != ISM_ERROR)
 		goto out;
 
 	ism_free_dmb(ism, dmb);

drivers/s390/net/qeth_core_main.c

@@ -4884,8 +4884,8 @@ static int qeth_qdio_establish(struct qeth_card *card)
 	init_data.output_handler	 = qeth_qdio_output_handler;
 	init_data.queue_start_poll_array = queue_start_poll;
 	init_data.int_parm               = (unsigned long) card;
-	init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
+	init_data.input_sbal_addr_array  = in_sbal_ptrs;
-	init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
+	init_data.output_sbal_addr_array = out_sbal_ptrs;
 	init_data.output_sbal_state_array = card->qdio.out_bufstates;
 	init_data.scan_threshold =
 		(card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;

drivers/s390/scsi/zfcp_qdio.c

@@ -294,8 +294,8 @@ static void zfcp_qdio_setup_init_data(struct qdio_initialize *id,
 	id->input_handler = zfcp_qdio_int_resp;
 	id->output_handler = zfcp_qdio_int_req;
 	id->int_parm = (unsigned long) qdio;
-	id->input_sbal_addr_array = (void **) (qdio->res_q);
+	id->input_sbal_addr_array = qdio->res_q;
-	id->output_sbal_addr_array = (void **) (qdio->req_q);
+	id->output_sbal_addr_array = qdio->req_q;
 	id->scan_threshold =
 		QDIO_MAX_BUFFERS_PER_Q - ZFCP_QDIO_MAX_SBALS_PER_REQ * 2;
 }

include/linux/syscalls.h

@@ -1185,6 +1185,10 @@ unsigned long ksys_mmap_pgoff(unsigned long addr, unsigned long len,
 			      unsigned long prot, unsigned long flags,
 			      unsigned long fd, unsigned long pgoff);
 ssize_t ksys_readahead(int fd, loff_t offset, size_t count);
+int ksys_ipc(unsigned int call, int first, unsigned long second,
+	unsigned long third, void __user * ptr, long fifth);
+int compat_ksys_ipc(u32 call, int first, int second,
+	u32 third, u32 ptr, u32 fifth);
 
 /*
  * The following kernel syscall equivalents are just wrappers to fs-internal

ipc/syscall.c

@@ -17,8 +17,8 @@
 #include <linux/shm.h>
 #include <linux/uaccess.h>
 
-SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
+int ksys_ipc(unsigned int call, int first, unsigned long second,
-		unsigned long, third, void __user *, ptr, long, fifth)
+	unsigned long third, void __user * ptr, long fifth)
 {
 	int version, ret;
 
@@ -106,6 +106,12 @@ SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
 		return -ENOSYS;
 	}
 }
+
+SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
+		unsigned long, third, void __user *, ptr, long, fifth)
+{
+	return ksys_ipc(call, first, second, third, ptr, fifth);
+}
 #endif
 
 #ifdef CONFIG_COMPAT
@@ -121,8 +127,8 @@ struct compat_ipc_kludge {
 };
 
 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
-COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
+int compat_ksys_ipc(u32 call, int first, int second,
-	u32, third, compat_uptr_t, ptr, u32, fifth)
+	u32 third, compat_uptr_t ptr, u32 fifth)
 {
 	int version;
 	u32 pad;
@@ -195,5 +201,11 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
 
 	return -ENOSYS;
 }
+
+COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
+	u32, third, compat_uptr_t, ptr, u32, fifth)
+{
+	return compat_ksys_ipc(call, first, second, third, ptr, fifth);
+}
 #endif
 #endif

kernel/sys_ni.c

@@ -366,6 +366,7 @@ COND_SYSCALL(kexec_file_load);
 /* s390 */
 COND_SYSCALL(s390_pci_mmio_read);
 COND_SYSCALL(s390_pci_mmio_write);
+COND_SYSCALL(s390_ipc);
 COND_SYSCALL_COMPAT(s390_ipc);
 
 /* powerpc */