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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2016-06-30 17:56:36 +0200 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2016-07-25 14:30:53 +0200 |
| commit | 3e9e57fad3d8530aa30787f861c710f598ddc4e7 (patch) | |
| tree | f437f258cbf0b76537d5e51f37a9f45381d4bf0a /arch/x86/kernel/setup_percpu.c | |
| parent | x86/xen: update cpuid.h from Xen-4.7 (diff) | |
| download | linux-3e9e57fad3d8530aa30787f861c710f598ddc4e7.tar.xz linux-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/setup_percpu.c')
| -rw-r--r-- | arch/x86/kernel/setup_percpu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c index e4fcb87ba7a6..7a40e068302d 100644 --- a/arch/x86/kernel/setup_percpu.c +++ b/arch/x86/kernel/setup_percpu.c @@ -236,6 +236,8 @@ void __init setup_per_cpu_areas(void) early_per_cpu_map(x86_cpu_to_apicid, cpu); per_cpu(x86_bios_cpu_apicid, cpu) = early_per_cpu_map(x86_bios_cpu_apicid, cpu); + per_cpu(x86_cpu_to_acpiid, cpu) = + early_per_cpu_map(x86_cpu_to_acpiid, cpu); #endif #ifdef CONFIG_X86_32 per_cpu(x86_cpu_to_logical_apicid, cpu) = @@ -271,6 +273,7 @@ void __init setup_per_cpu_areas(void) #ifdef CONFIG_X86_LOCAL_APIC early_per_cpu_ptr(x86_cpu_to_apicid) = NULL; early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL; + early_per_cpu_ptr(x86_cpu_to_acpiid) = NULL; #endif #ifdef CONFIG_X86_32 early_per_cpu_ptr(x86_cpu_to_logical_apicid) = NULL; |