ACPI: processor: introduce arch_has_acpi_pdc

arch dependent helper function that tells us if we should attempt to
evaluate _PDC on this machine or not.

The x86 implementation assumes that the CPUs in the machine must be
homogeneous, and that you cannot mix CPUs of different vendors.

Cc: Tony Luck <tony.luck@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/arch/x86/kernel/acpi/processor.c b/arch/x86/kernel/acpi/processor.c
index d85d1b2432ba..bcb6efe08c5d 100644
--- a/arch/x86/kernel/acpi/processor.c
+++ b/arch/x86/kernel/acpi/processor.c
@@ -79,9 +79,7 @@ void arch_acpi_processor_init_pdc(struct acpi_processor *pr)
         struct cpuinfo_x86 *c = &cpu_data(pr->id);
 
         pr->pdc = NULL;
-        if (c->x86_vendor == X86_VENDOR_INTEL ||
-            c->x86_vendor == X86_VENDOR_CENTAUR)
-                init_intel_pdc(pr, c);
+        init_intel_pdc(pr, c);
 
         return;
 }