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/kernel/apic | |
| parent | x86/xen: update cpuid.h from Xen-4.7 (diff) | |
| download | linux-dev-3e9e57fad3d8530aa30787f861c710f598ddc4e7.tar.xz linux-dev-3e9e57fad3d8530aa30787f861c710f598ddc4e7.zip | |
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/kernel/apic')
| -rw-r--r-- | arch/x86/kernel/apic/apic.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 60078a67d7e3..db2326fd6cfa 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -92,8 +92,10 @@ static int apic_extnmi = APIC_EXTNMI_BSP; */ DEFINE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid, BAD_APICID); DEFINE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid, BAD_APICID); +DEFINE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid, U32_MAX); EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid); EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid); +EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_acpiid); #ifdef CONFIG_X86_32 |