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ACPI: processor: introduce arch_has_acpi_pdc

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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>
This commit is contained in:
Alex Chiang 2009-12-20 12:19:14 -07:00 committed by Len Brown
parent 78f1699659
commit 1d9cb470a7
4 changed files with 13 additions and 3 deletions
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2
arch/ia64/include/asm/acpi.h
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@ -132,6 +132,8 @@ extern int __devinitdata pxm_to_nid_map[MAX_PXM_DOMAINS];
extern int __initdata nid_to_pxm_map[MAX_NUMNODES]; extern int __initdata nid_to_pxm_map[MAX_NUMNODES];
#endif #endif
static inline bool arch_has_acpi_pdc(void) { return true; }
#define acpi_unlazy_tlb(x) #define acpi_unlazy_tlb(x)
#ifdef CONFIG_ACPI_NUMA #ifdef CONFIG_ACPI_NUMA

7
arch/x86/include/asm/acpi.h
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@ -142,6 +142,13 @@ static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
return max_cstate; return max_cstate;
} }
static inline bool arch_has_acpi_pdc(void)
{
struct cpuinfo_x86 *c = &cpu_data(0);
return (c->x86_vendor == X86_VENDOR_INTEL ||
c->x86_vendor == X86_VENDOR_CENTAUR);
}
#else /* !CONFIG_ACPI */ #else /* !CONFIG_ACPI */
#define acpi_lapic 0 #define acpi_lapic 0

4
arch/x86/kernel/acpi/processor.c
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@ -79,9 +79,7 @@ void arch_acpi_processor_init_pdc(struct acpi_processor *pr)
struct cpuinfo_x86 *c = &cpu_data(pr->id); struct cpuinfo_x86 *c = &cpu_data(pr->id);
pr->pdc = NULL; pr->pdc = NULL;
if (c->x86_vendor == X86_VENDOR_INTEL || init_intel_pdc(pr, c);
c->x86_vendor == X86_VENDOR_CENTAUR)
init_intel_pdc(pr, c);
return; return;
} }

3
drivers/acpi/processor_pdc.c
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@ -69,6 +69,9 @@ static int acpi_processor_eval_pdc(struct acpi_processor *pr)
void acpi_processor_set_pdc(struct acpi_processor *pr) void acpi_processor_set_pdc(struct acpi_processor *pr)
{ {
if (arch_has_acpi_pdc() == false)
return;
arch_acpi_processor_init_pdc(pr); arch_acpi_processor_init_pdc(pr);
acpi_processor_eval_pdc(pr); acpi_processor_eval_pdc(pr);
arch_acpi_processor_cleanup_pdc(pr); arch_acpi_processor_cleanup_pdc(pr);