[PATCH] s390: default storage key
Provide an easy way to define a non-zero storage key at compile time. This is useful for debugging purposes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Peter Oberparleiter
Linus Torvalds
Родитель
c9e3735359
Коммит
0b642ede47
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@ -34,7 +34,6 @@ EXPORT_SYMBOL(__clear_user_asm);
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EXPORT_SYMBOL(__strncpy_from_user_asm);
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EXPORT_SYMBOL(__strnlen_user_asm);
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EXPORT_SYMBOL(diag10);
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EXPORT_SYMBOL(default_storage_key);
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/*
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* semaphore ops
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@ -44,6 +44,8 @@
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#include <asm/cpcmd.h>
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#include <asm/lowcore.h>
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#include <asm/irq.h>
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#include <asm/page.h>
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#include <asm/ptrace.h>
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/*
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* Machine setup..
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@ -53,7 +55,6 @@ unsigned int console_devno = -1;
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unsigned int console_irq = -1;
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unsigned long memory_size = 0;
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unsigned long machine_flags = 0;
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unsigned int default_storage_key = 0;
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struct {
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unsigned long addr, size, type;
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} memory_chunk[MEMORY_CHUNKS] = { { 0 } };
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@ -402,7 +403,7 @@ setup_lowcore(void)
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lc = (struct _lowcore *)
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__alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0);
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memset(lc, 0, lc_pages * PAGE_SIZE);
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lc->restart_psw.mask = PSW_BASE_BITS;
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lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
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lc->restart_psw.addr =
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PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
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lc->external_new_psw.mask = PSW_KERNEL_BITS;
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@ -470,7 +471,7 @@ static void __init
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setup_memory(void)
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{
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unsigned long bootmap_size;
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unsigned long start_pfn, end_pfn;
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unsigned long start_pfn, end_pfn, init_pfn;
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unsigned long last_rw_end;
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int i;
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@ -481,6 +482,10 @@ setup_memory(void)
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start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT;
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end_pfn = max_pfn = memory_end >> PAGE_SHIFT;
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/* Initialize storage key for kernel pages */
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for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++)
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page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY);
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/*
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* Initialize the boot-time allocator (with low memory only):
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*/
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@ -491,7 +496,7 @@ setup_memory(void)
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*/
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last_rw_end = start_pfn;
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for (i = 0; i < 16 && memory_chunk[i].size > 0; i++) {
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for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
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unsigned long start_chunk, end_chunk;
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if (memory_chunk[i].type != CHUNK_READ_WRITE)
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@ -505,6 +510,11 @@ setup_memory(void)
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if (end_chunk > end_pfn)
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end_chunk = end_pfn;
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if (start_chunk < end_chunk) {
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/* Initialize storage key for RAM pages */
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for (init_pfn = start_chunk ; init_pfn < end_chunk;
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init_pfn++)
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page_set_storage_key(init_pfn << PAGE_SHIFT,
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PAGE_DEFAULT_KEY);
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free_bootmem(start_chunk << PAGE_SHIFT,
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(end_chunk - start_chunk) << PAGE_SHIFT);
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if (last_rw_end < start_chunk)
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@ -513,6 +523,8 @@ setup_memory(void)
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}
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}
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psw_set_key(PAGE_DEFAULT_KEY);
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if (last_rw_end < end_pfn - 1)
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add_memory_hole(last_rw_end, end_pfn - 1);
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@ -1,7 +1,7 @@
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/*
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* drivers/s390/cio/cio.c
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* S/390 common I/O routines -- low level i/o calls
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* $Revision: 1.131 $
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* $Revision: 1.133 $
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*
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* Copyright (C) 1999-2002 IBM Deutschland Entwicklung GmbH,
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* IBM Corporation
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@ -228,7 +228,7 @@ cio_start_key (struct subchannel *sch, /* subchannel structure */
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int
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cio_start (struct subchannel *sch, struct ccw1 *cpa, __u8 lpm)
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{
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return cio_start_key(sch, cpa, lpm, default_storage_key);
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return cio_start_key(sch, cpa, lpm, PAGE_DEFAULT_KEY);
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}
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/*
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@ -1,7 +1,7 @@
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/*
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* drivers/s390/cio/device_ops.c
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*
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* $Revision: 1.55 $
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* $Revision: 1.56 $
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*
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* Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
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* IBM Corporation
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@ -128,7 +128,7 @@ ccw_device_start(struct ccw_device *cdev, struct ccw1 *cpa,
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unsigned long intparm, __u8 lpm, unsigned long flags)
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{
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return ccw_device_start_key(cdev, cpa, intparm, lpm,
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default_storage_key, flags);
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PAGE_DEFAULT_KEY, flags);
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}
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int
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@ -137,7 +137,7 @@ ccw_device_start_timeout(struct ccw_device *cdev, struct ccw1 *cpa,
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int expires)
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{
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return ccw_device_start_timeout_key(cdev, cpa, intparm, lpm,
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default_storage_key, flags,
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PAGE_DEFAULT_KEY, flags,
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expires);
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}
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@ -1,7 +1,9 @@
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#ifndef _CIO_QDIO_H
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#define _CIO_QDIO_H
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#define VERSION_CIO_QDIO_H "$Revision: 1.26 $"
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#include <asm/page.h>
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#define VERSION_CIO_QDIO_H "$Revision: 1.32 $"
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#ifdef CONFIG_QDIO_DEBUG
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#define QDIO_VERBOSE_LEVEL 9
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@ -42,7 +44,7 @@
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#define QDIO_Q_LAPS 5
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#define QDIO_STORAGE_KEY 0
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#define QDIO_STORAGE_KEY PAGE_DEFAULT_KEY
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#define L2_CACHELINE_SIZE 256
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#define INDICATORS_PER_CACHELINE (L2_CACHELINE_SIZE/sizeof(__u32))
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@ -16,6 +16,8 @@
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#define PAGE_SHIFT 12
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#define PAGE_SIZE (1UL << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#define PAGE_DEFAULT_ACC 0
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#define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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@ -245,7 +245,7 @@ static inline void enabled_wait(void)
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psw_t wait_psw;
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wait_psw.mask = PSW_BASE_BITS | PSW_MASK_IO | PSW_MASK_EXT |
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PSW_MASK_MCHECK | PSW_MASK_WAIT;
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PSW_MASK_MCHECK | PSW_MASK_WAIT | PSW_DEFAULT_KEY;
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#ifndef __s390x__
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asm volatile (
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" basr %0,0\n"
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@ -185,6 +185,7 @@
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#include <linux/stddef.h>
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#include <linux/types.h>
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#include <asm/setup.h>
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#include <asm/page.h>
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typedef union
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{
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@ -235,6 +236,7 @@ typedef struct
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#define PSW_ADDR_INSN 0x7FFFFFFFUL
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#define PSW_BASE_BITS 0x00080000UL
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#define PSW_DEFAULT_KEY (((unsigned long) PAGE_DEFAULT_ACC) << 20)
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#define PSW_ASC_PRIMARY 0x00000000UL
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#define PSW_ASC_ACCREG 0x00004000UL
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@ -260,6 +262,7 @@ typedef struct
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#define PSW_BASE_BITS 0x0000000180000000UL
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#define PSW_BASE32_BITS 0x0000000080000000UL
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#define PSW_DEFAULT_KEY (((unsigned long) PAGE_DEFAULT_ACC) << 52)
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#define PSW_ASC_PRIMARY 0x0000000000000000UL
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#define PSW_ASC_ACCREG 0x0000400000000000UL
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@ -268,14 +271,15 @@ typedef struct
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#define PSW_USER32_BITS (PSW_BASE32_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \
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PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \
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PSW_MASK_PSTATE)
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PSW_MASK_PSTATE | PSW_DEFAULT_KEY)
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#endif /* __s390x__ */
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#define PSW_KERNEL_BITS (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY)
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#define PSW_KERNEL_BITS (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | \
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PSW_DEFAULT_KEY)
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#define PSW_USER_BITS (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \
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PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \
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PSW_MASK_PSTATE)
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PSW_MASK_PSTATE | PSW_DEFAULT_KEY)
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/* This macro merges a NEW PSW mask specified by the user into
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the currently active PSW mask CURRENT, modifying only those
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@ -470,6 +474,12 @@ struct user_regs_struct
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extern void show_regs(struct pt_regs * regs);
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#endif
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static inline void
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psw_set_key(unsigned int key)
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{
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asm volatile ( "spka 0(%0)" : : "d" (key) );
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}
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#endif /* __ASSEMBLY__ */
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#endif /* _S390_PTRACE_H */
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