diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2016-06-30 17:56:36 +0200 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2016-07-25 13:30:53 +0100 |
| commit | 3e9e57fad3d8530aa30787f861c710f598ddc4e7 (patch) | |
| tree | f437f258cbf0b76537d5e51f37a9f45381d4bf0a /arch/x86/include/asm/smp.h | |
| parent | de2f5537b397249e91cafcbed4de64a24818542e (diff) | |
| download | linux-0-day-3e9e57fad3d8530aa30787f861c710f598ddc4e7.tar.gz linux-0-day-3e9e57fad3d8530aa30787f861c710f598ddc4e7.tar.xz | |
x86/acpi: store ACPI ids from MADT for future usage
Currently we don't save ACPI ids (unlike LAPIC ids which go to
x86_cpu_to_apicid) from MADT and we may need this information later.
Particularly, ACPI ids is the only existent way for a PVHVM Xen guest
to figure out Xen's idea of its vCPUs ids before these CPUs boot and
in some cases these ids diverge from Linux's cpu ids.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'arch/x86/include/asm/smp.h')
| -rw-r--r-- | arch/x86/include/asm/smp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h index 66b057306f404..c47b42b0d2837 100644 --- a/arch/x86/include/asm/smp.h +++ b/arch/x86/include/asm/smp.h @@ -33,6 +33,7 @@ static inline struct cpumask *cpu_llc_shared_mask(int cpu) } DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); +DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid); @@ -147,6 +148,7 @@ void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); void smp_store_boot_cpu_info(void); void smp_store_cpu_info(int id); #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) +#define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) #else /* !CONFIG_SMP */ #define wbinvd_on_cpu(cpu) wbinvd() |