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| author | Alex Chiang <achiang@hp.com> | 2009-12-20 12:19:14 -0700 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-12-22 03:24:10 -0500 |
| commit | 1d9cb470a755409ce97c3376174b1e234bd20371 (patch) | |
| tree | cc0f35e02fed9b833be7bafda72b4980c4667ec9 /arch/x86 | |
| parent | 78f1699659963fff97975df44db6d5dbe7218e55 (diff) | |
| download | linux-1d9cb470a755409ce97c3376174b1e234bd20371.tar.gz linux-1d9cb470a755409ce97c3376174b1e234bd20371.tar.bz2 linux-1d9cb470a755409ce97c3376174b1e234bd20371.zip | |
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>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/acpi.h | 7 | ||||
| -rw-r--r-- | arch/x86/kernel/acpi/processor.c | 4 |
2 files changed, 8 insertions, 3 deletions
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h index 60d2b2db0bc5..d787e6e92bd1 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 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; } |