WSL2-Linux-Kernel/arch/x86/kernel/jailhouse.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Jailhouse paravirt_ops implementation
*
* Copyright (c) Siemens AG, 2015-2017
*
* Authors:
* Jan Kiszka <jan.kiszka@siemens.com>
*/
#include <linux/acpi_pmtmr.h>
#include <linux/kernel.h>
#include <linux/reboot.h>
#include <asm/apic.h>
#include <asm/cpu.h>
#include <asm/hypervisor.h>
#include <asm/i8259.h>
#include <asm/irqdomain.h>
#include <asm/pci_x86.h>
#include <asm/reboot.h>
#include <asm/setup.h>
x86/headers: Fix -Wmissing-prototypes warning When building the kernel with W=1 we get a lot of -Wmissing-prototypes warnings, which are trivial in nature and easy to fix - and which may mask some real future bugs if the prototypes get out of sync with the function definition. This patch fixes most of -Wmissing-prototypes warnings which are in the root directory of arch/x86/kernel, not including the subdirectories. These are the warnings fixed in this patch: arch/x86/kernel/signal.c:865:17: warning: no previous prototype for ‘sys32_x32_rt_sigreturn’ [-Wmissing-prototypes] arch/x86/kernel/signal_compat.c:164:6: warning: no previous prototype for ‘sigaction_compat_abi’ [-Wmissing-prototypes] arch/x86/kernel/traps.c:625:46: warning: no previous prototype for ‘sync_regs’ [-Wmissing-prototypes] arch/x86/kernel/traps.c:640:24: warning: no previous prototype for ‘fixup_bad_iret’ [-Wmissing-prototypes] arch/x86/kernel/traps.c:929:13: warning: no previous prototype for ‘trap_init’ [-Wmissing-prototypes] arch/x86/kernel/irq.c:270:28: warning: no previous prototype for ‘smp_x86_platform_ipi’ [-Wmissing-prototypes] arch/x86/kernel/irq.c:301:16: warning: no previous prototype for ‘smp_kvm_posted_intr_ipi’ [-Wmissing-prototypes] arch/x86/kernel/irq.c:314:16: warning: no previous prototype for ‘smp_kvm_posted_intr_wakeup_ipi’ [-Wmissing-prototypes] arch/x86/kernel/irq.c:328:16: warning: no previous prototype for ‘smp_kvm_posted_intr_nested_ipi’ [-Wmissing-prototypes] arch/x86/kernel/irq_work.c:16:28: warning: no previous prototype for ‘smp_irq_work_interrupt’ [-Wmissing-prototypes] arch/x86/kernel/irqinit.c:79:13: warning: no previous prototype for ‘init_IRQ’ [-Wmissing-prototypes] arch/x86/kernel/quirks.c:672:13: warning: no previous prototype for ‘early_platform_quirks’ [-Wmissing-prototypes] arch/x86/kernel/tsc.c:1499:15: warning: no previous prototype for ‘calibrate_delay_is_known’ [-Wmissing-prototypes] arch/x86/kernel/process.c:653:13: warning: no previous prototype for ‘arch_post_acpi_subsys_init’ [-Wmissing-prototypes] arch/x86/kernel/process.c:717:15: warning: no previous prototype for ‘arch_randomize_brk’ [-Wmissing-prototypes] arch/x86/kernel/process.c:784:6: warning: no previous prototype for ‘do_arch_prctl_common’ [-Wmissing-prototypes] arch/x86/kernel/reboot.c:869:6: warning: no previous prototype for ‘nmi_panic_self_stop’ [-Wmissing-prototypes] arch/x86/kernel/smp.c:176:27: warning: no previous prototype for ‘smp_reboot_interrupt’ [-Wmissing-prototypes] arch/x86/kernel/smp.c:260:28: warning: no previous prototype for ‘smp_reschedule_interrupt’ [-Wmissing-prototypes] arch/x86/kernel/smp.c:281:28: warning: no previous prototype for ‘smp_call_function_interrupt’ [-Wmissing-prototypes] arch/x86/kernel/smp.c:291:28: warning: no previous prototype for ‘smp_call_function_single_interrupt’ [-Wmissing-prototypes] arch/x86/kernel/ftrace.c:840:6: warning: no previous prototype for ‘arch_ftrace_update_trampoline’ [-Wmissing-prototypes] arch/x86/kernel/ftrace.c:934:7: warning: no previous prototype for ‘arch_ftrace_trampoline_func’ [-Wmissing-prototypes] arch/x86/kernel/ftrace.c:946:6: warning: no previous prototype for ‘arch_ftrace_trampoline_free’ [-Wmissing-prototypes] arch/x86/kernel/crash.c:114:6: warning: no previous prototype for ‘crash_smp_send_stop’ [-Wmissing-prototypes] arch/x86/kernel/crash.c:351:5: warning: no previous prototype for ‘crash_setup_memmap_entries’ [-Wmissing-prototypes] arch/x86/kernel/crash.c:424:5: warning: no previous prototype for ‘crash_load_segments’ [-Wmissing-prototypes] arch/x86/kernel/machine_kexec_64.c:372:7: warning: no previous prototype for ‘arch_kexec_kernel_image_load’ [-Wmissing-prototypes] arch/x86/kernel/paravirt-spinlocks.c:12:16: warning: no previous prototype for ‘__native_queued_spin_unlock’ [-Wmissing-prototypes] arch/x86/kernel/paravirt-spinlocks.c:18:6: warning: no previous prototype for ‘pv_is_native_spin_unlock’ [-Wmissing-prototypes] arch/x86/kernel/paravirt-spinlocks.c:24:16: warning: no previous prototype for ‘__native_vcpu_is_preempted’ [-Wmissing-prototypes] arch/x86/kernel/paravirt-spinlocks.c:30:6: warning: no previous prototype for ‘pv_is_native_vcpu_is_preempted’ [-Wmissing-prototypes] arch/x86/kernel/kvm.c:258:1: warning: no previous prototype for ‘do_async_page_fault’ [-Wmissing-prototypes] arch/x86/kernel/jailhouse.c:200:6: warning: no previous prototype for ‘jailhouse_paravirt’ [-Wmissing-prototypes] arch/x86/kernel/check.c:91:13: warning: no previous prototype for ‘setup_bios_corruption_check’ [-Wmissing-prototypes] arch/x86/kernel/check.c:139:6: warning: no previous prototype for ‘check_for_bios_corruption’ [-Wmissing-prototypes] arch/x86/kernel/devicetree.c:32:13: warning: no previous prototype for ‘early_init_dt_scan_chosen_arch’ [-Wmissing-prototypes] arch/x86/kernel/devicetree.c:42:13: warning: no previous prototype for ‘add_dtb’ [-Wmissing-prototypes] arch/x86/kernel/devicetree.c:108:6: warning: no previous prototype for ‘x86_of_pci_init’ [-Wmissing-prototypes] arch/x86/kernel/devicetree.c:314:13: warning: no previous prototype for ‘x86_dtb_init’ [-Wmissing-prototypes] arch/x86/kernel/tracepoint.c:16:5: warning: no previous prototype for ‘trace_pagefault_reg’ [-Wmissing-prototypes] arch/x86/kernel/tracepoint.c:22:6: warning: no previous prototype for ‘trace_pagefault_unreg’ [-Wmissing-prototypes] arch/x86/kernel/head64.c:113:22: warning: no previous prototype for ‘__startup_64’ [-Wmissing-prototypes] arch/x86/kernel/head64.c:262:15: warning: no previous prototype for ‘__startup_secondary_64’ [-Wmissing-prototypes] arch/x86/kernel/head64.c:350:12: warning: no previous prototype for ‘early_make_pgtable’ [-Wmissing-prototypes] [ mingo: rewrote the changelog, fixed build errors. ] Signed-off-by: Yi Wang <wang.yi59@zte.com.cn> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: akataria@vmware.com Cc: akpm@linux-foundation.org Cc: andy.shevchenko@gmail.com Cc: anton@enomsg.org Cc: ard.biesheuvel@linaro.org Cc: bhe@redhat.com Cc: bhelgaas@google.com Cc: bp@alien8.de Cc: ccross@android.com Cc: devicetree@vger.kernel.org Cc: douly.fnst@cn.fujitsu.com Cc: dwmw@amazon.co.uk Cc: dyoung@redhat.com Cc: ebiederm@xmission.com Cc: frank.rowand@sony.com Cc: frowand.list@gmail.com Cc: ivan.gorinov@intel.com Cc: jailhouse-dev@googlegroups.com Cc: jan.kiszka@siemens.com Cc: jgross@suse.com Cc: jroedel@suse.de Cc: keescook@chromium.org Cc: kexec@lists.infradead.org Cc: konrad.wilk@oracle.com Cc: kvm@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-pci@vger.kernel.org Cc: luto@kernel.org Cc: m.mizuma@jp.fujitsu.com Cc: namit@vmware.com Cc: oleg@redhat.com Cc: pasha.tatashin@oracle.com Cc: pbonzini@redhat.com Cc: prarit@redhat.com Cc: pravin.shedge4linux@gmail.com Cc: rajvi.jingar@intel.com Cc: rkrcmar@redhat.com Cc: robh+dt@kernel.org Cc: robh@kernel.org Cc: rostedt@goodmis.org Cc: takahiro.akashi@linaro.org Cc: thomas.lendacky@amd.com Cc: tony.luck@intel.com Cc: up2wing@gmail.com Cc: virtualization@lists.linux-foundation.org Cc: zhe.he@windriver.com Cc: zhong.weidong@zte.com.cn Link: http://lkml.kernel.org/r/1542852249-19820-1-git-send-email-wang.yi59@zte.com.cn Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-11-22 05:04:09 +03:00
#include <asm/jailhouse_para.h>
static __initdata struct jailhouse_setup_data setup_data;
static unsigned int precalibrated_tsc_khz;
static uint32_t jailhouse_cpuid_base(void)
{
if (boot_cpu_data.cpuid_level < 0 ||
!boot_cpu_has(X86_FEATURE_HYPERVISOR))
return 0;
return hypervisor_cpuid_base("Jailhouse\0\0\0", 0);
}
static uint32_t __init jailhouse_detect(void)
{
return jailhouse_cpuid_base();
}
static void jailhouse_get_wallclock(struct timespec64 *now)
{
memset(now, 0, sizeof(*now));
}
static void __init jailhouse_timer_init(void)
{
lapic_timer_period = setup_data.apic_khz * (1000 / HZ);
}
static unsigned long jailhouse_get_tsc(void)
{
return precalibrated_tsc_khz;
}
static void __init jailhouse_x2apic_init(void)
{
#ifdef CONFIG_X86_X2APIC
if (!x2apic_enabled())
return;
/*
* We do not have access to IR inside Jailhouse non-root cells. So
* we have to run in physical mode.
*/
x2apic_phys = 1;
/*
* This will trigger the switch to apic_x2apic_phys. Empty OEM IDs
* ensure that only this APIC driver picks up the call.
*/
default_acpi_madt_oem_check("", "");
#endif
}
static void __init jailhouse_get_smp_config(unsigned int early)
{
struct ioapic_domain_cfg ioapic_cfg = {
.type = IOAPIC_DOMAIN_STRICT,
.ops = &mp_ioapic_irqdomain_ops,
};
struct mpc_intsrc mp_irq = {
.type = MP_INTSRC,
.irqtype = mp_INT,
.irqflag = MP_IRQPOL_ACTIVE_HIGH | MP_IRQTRIG_EDGE,
};
unsigned int cpu;
jailhouse_x2apic_init();
register_lapic_address(0xfee00000);
for (cpu = 0; cpu < setup_data.num_cpus; cpu++) {
generic_processor_info(setup_data.cpu_ids[cpu],
boot_cpu_apic_version);
}
smp_found_config = 1;
if (setup_data.standard_ioapic) {
mp_register_ioapic(0, 0xfec00000, gsi_top, &ioapic_cfg);
/* Register 1:1 mapping for legacy UART IRQs 3 and 4 */
mp_irq.srcbusirq = mp_irq.dstirq = 3;
mp_save_irq(&mp_irq);
mp_irq.srcbusirq = mp_irq.dstirq = 4;
mp_save_irq(&mp_irq);
}
}
static void jailhouse_no_restart(void)
{
pr_notice("Jailhouse: Restart not supported, halting\n");
machine_halt();
}
static int __init jailhouse_pci_arch_init(void)
{
pci_direct_init(1);
/*
* There are no bridges on the virtual PCI root bus under Jailhouse,
* thus no other way to discover all devices than a full scan.
* Respect any overrides via the command line, though.
*/
if (pcibios_last_bus < 0)
pcibios_last_bus = 0xff;
#ifdef CONFIG_PCI_MMCONFIG
if (setup_data.pci_mmconfig_base) {
pci_mmconfig_add(0, 0, pcibios_last_bus,
setup_data.pci_mmconfig_base);
pci_mmcfg_arch_init();
}
#endif
return 0;
}
static void __init jailhouse_init_platform(void)
{
u64 pa_data = boot_params.hdr.setup_data;
struct setup_data header;
void *mapping;
x86_init.irqs.pre_vector_init = x86_init_noop;
x86_init.timers.timer_init = jailhouse_timer_init;
x86_init.mpparse.get_smp_config = jailhouse_get_smp_config;
x86_init.pci.arch_init = jailhouse_pci_arch_init;
x86_platform.calibrate_cpu = jailhouse_get_tsc;
x86_platform.calibrate_tsc = jailhouse_get_tsc;
x86_platform.get_wallclock = jailhouse_get_wallclock;
x86_platform.legacy.rtc = 0;
x86_platform.legacy.warm_reset = 0;
x86_platform.legacy.i8042 = X86_LEGACY_I8042_PLATFORM_ABSENT;
legacy_pic = &null_legacy_pic;
machine_ops.emergency_restart = jailhouse_no_restart;
while (pa_data) {
mapping = early_memremap(pa_data, sizeof(header));
memcpy(&header, mapping, sizeof(header));
early_memunmap(mapping, sizeof(header));
if (header.type == SETUP_JAILHOUSE &&
header.len >= sizeof(setup_data)) {
pa_data += offsetof(struct setup_data, data);
mapping = early_memremap(pa_data, sizeof(setup_data));
memcpy(&setup_data, mapping, sizeof(setup_data));
early_memunmap(mapping, sizeof(setup_data));
break;
}
pa_data = header.next;
}
if (!pa_data)
panic("Jailhouse: No valid setup data found");
if (setup_data.compatible_version > JAILHOUSE_SETUP_REQUIRED_VERSION)
panic("Jailhouse: Unsupported setup data structure");
pmtmr_ioport = setup_data.pm_timer_address;
pr_debug("Jailhouse: PM-Timer IO Port: %#x\n", pmtmr_ioport);
precalibrated_tsc_khz = setup_data.tsc_khz;
setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ);
pci_probe = 0;
/*
* Avoid that the kernel complains about missing ACPI tables - there
* are none in a non-root cell.
*/
disable_acpi();
}
bool jailhouse_paravirt(void)
{
return jailhouse_cpuid_base() != 0;
}
static bool __init jailhouse_x2apic_available(void)
{
/*
* The x2APIC is only available if the root cell enabled it. Jailhouse
* does not support switching between xAPIC and x2APIC.
*/
return x2apic_enabled();
}
const struct hypervisor_x86 x86_hyper_jailhouse __refconst = {
.name = "Jailhouse",
.detect = jailhouse_detect,
.init.init_platform = jailhouse_init_platform,
.init.x2apic_available = jailhouse_x2apic_available,
.ignore_nopv = true,
};