diff options
| 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/include | |
| parent | ACPI: processor: call _PDC early (diff) | |
| download | linux-dev-1d9cb470a755409ce97c3376174b1e234bd20371.tar.xz linux-dev-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/include')
| -rw-r--r-- | arch/x86/include/asm/acpi.h | 7 |
1 files changed, 7 insertions, 0 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 |