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authorAlex Chiang <achiang@hp.com>2009-12-20 12:19:14 -0700
committerLen Brown <len.brown@intel.com>2009-12-22 03:24:10 -0500
commit1d9cb470a755409ce97c3376174b1e234bd20371 (patch)
treecc0f35e02fed9b833be7bafda72b4980c4667ec9
parent78f1699659963fff97975df44db6d5dbe7218e55 (diff)
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>
-rw-r--r--arch/ia64/include/asm/acpi.h2
-rw-r--r--arch/x86/include/asm/acpi.h7
-rw-r--r--arch/x86/kernel/acpi/processor.c4
-rw-r--r--drivers/acpi/processor_pdc.c3
4 files changed, 13 insertions, 3 deletions
diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h
index 91df9686a0d..3b788829464 100644
--- a/arch/ia64/include/asm/acpi.h
+++ b/arch/ia64/include/asm/acpi.h
@@ -132,6 +132,8 @@ extern int __devinitdata pxm_to_nid_map[MAX_PXM_DOMAINS];
extern int __initdata nid_to_pxm_map[MAX_NUMNODES];
#endif
+static inline bool arch_has_acpi_pdc(void) { return true; }
+
#define acpi_unlazy_tlb(x)
#ifdef CONFIG_ACPI_NUMA
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 60d2b2db0bc..d787e6e92bd 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -142,6 +142,13 @@ static inline unsigned int acpi_processor_cstate_check(unsigned int 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 */
#define acpi_lapic 0
diff --git a/arch/x86/kernel/acpi/processor.c b/arch/x86/kernel/acpi/processor.c
index d85d1b2432b..bcb6efe08c5 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;
}
diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c
index b416c32dda0..931e735e9e3 100644
--- a/drivers/acpi/processor_pdc.c
+++ b/drivers/acpi/processor_pdc.c
@@ -69,6 +69,9 @@ static int acpi_processor_eval_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);
acpi_processor_eval_pdc(pr);
arch_acpi_processor_cleanup_pdc(pr);