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authorVitaly Kuznetsov <vkuznets@redhat.com>2016-06-30 17:56:36 +0200
committerDavid Vrabel <david.vrabel@citrix.com>2016-07-25 13:30:53 +0100
commit3e9e57fad3d8530aa30787f861c710f598ddc4e7 (patch)
treef437f258cbf0b76537d5e51f37a9f45381d4bf0a /arch/x86/kernel/setup_percpu.c
parentde2f5537b397249e91cafcbed4de64a24818542e (diff)
download96b-common-3e9e57fad3d8530aa30787f861c710f598ddc4e7.tar.gz
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.c3
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;