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| author | H. Peter Anvin <hpa@zytor.com> | 2010-07-07 17:29:18 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-07-07 17:29:18 -0700 |
| commit | bdc802dcca1709b01988d57e91f9f35ce1609fcc (patch) | |
| tree | c0f933ee09e214dd98d789243aa0914a5d9a821f /arch/x86/kernel | |
| parent | 24da9c26f3050aee9314ec09930a24c80fe76352 (diff) | |
| download | op-kernel-dev-bdc802dcca1709b01988d57e91f9f35ce1609fcc.zip op-kernel-dev-bdc802dcca1709b01988d57e91f9f35ce1609fcc.tar.gz | |
x86, cpu: Support the features flags in new CPUID leaf 7
Intel has defined CPUID leaf 7 as the next set of feature flags (see
the AVX specification, version 007). Add support for this new feature
flags word.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
LKML-Reference: <tip-*@vger.kernel.org>
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 68e4a6f..c735830 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -551,6 +551,16 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c) c->x86_capability[4] = excap; } + /* Additional Intel-defined flags: level 0x00000007 */ + if (c->cpuid_level >= 0x00000007) { + u32 eax, ebx, ecx, edx; + + cpuid_count(0x00000007, 0, &eax, &ebx, &ecx, &edx); + + if (eax > 0) + c->x86_capability[9] = ebx; + } + /* AMD-defined flags: level 0x80000001 */ xlvl = cpuid_eax(0x80000000); c->extended_cpuid_level = xlvl; |
