diff options
| author | Andreas Herrmann <andreas.herrmann3@amd.com> | 2012-10-19 10:58:13 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-13 11:22:28 -0800 |
| commit | 193f3fcb3ab769bab4a2b9fa181eef3e5699a352 (patch) | |
| tree | 8afed963459adc5cd706eed124d903e444b01a9f | |
| parent | 77b67063bb6bce6d475e910d3b886a606d0d91f7 (diff) | |
| download | linux-193f3fcb3ab769bab4a2b9fa181eef3e5699a352.tar.gz linux-193f3fcb3ab769bab4a2b9fa181eef3e5699a352.tar.bz2 linux-193f3fcb3ab769bab4a2b9fa181eef3e5699a352.zip | |
x86: Add cpu_has_topoext
Introduce cpu_has_topoext to check for AMD's CPUID topology extensions
support. It indicates support for
CPUID Fn8000_001D_EAX_x[N:0]-CPUID Fn8000_001E_EDX
See AMD's CPUID Specification, Publication # 25481
(as of Rev. 2.34 September 2010)
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Link: http://lkml.kernel.org/r/20121019085813.GD26718@alberich
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| -rw-r--r-- | arch/x86/include/asm/cpufeature.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 2 |
3 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h index 8c297aa53eef..c22a492daf57 100644 --- a/arch/x86/include/asm/cpufeature.h +++ b/arch/x86/include/asm/cpufeature.h @@ -311,6 +311,7 @@ extern const char * const x86_power_flags[32]; #define cpu_has_cx8 boot_cpu_has(X86_FEATURE_CX8) #define cpu_has_cx16 boot_cpu_has(X86_FEATURE_CX16) #define cpu_has_eager_fpu boot_cpu_has(X86_FEATURE_EAGER_FPU) +#define cpu_has_topoext boot_cpu_has(X86_FEATURE_TOPOEXT) #if defined(CONFIG_X86_INVLPG) || defined(CONFIG_X86_64) # define cpu_has_invlpg 1 diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index f7e98a2c0d12..64e9ad4e49a0 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -304,7 +304,7 @@ static void __cpuinit amd_get_topology(struct cpuinfo_x86 *c) int cpu = smp_processor_id(); /* get information required for multi-node processors */ - if (cpu_has(c, X86_FEATURE_TOPOEXT)) { + if (cpu_has_topoext) { u32 eax, ebx, ecx, edx; cpuid(0x8000001e, &eax, &ebx, &ecx, &edx); diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index c80a33bc528b..732bf5cff645 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -313,7 +313,7 @@ do { \ static bool __cpuinit match_smt(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o) { - if (cpu_has(c, X86_FEATURE_TOPOEXT)) { + if (cpu_has_topoext) { int cpu1 = c->cpu_index, cpu2 = o->cpu_index; if (c->phys_proc_id == o->phys_proc_id && |