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| author | Borislav Petkov <borislav.petkov@amd.com> | 2010-03-31 21:56:41 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-04-09 14:05:23 -0700 |
| commit | 5958f1d5d722df7a9e5d129676614a8e5219bacd (patch) | |
| tree | 968c1fcc99d4653a313a9c5e5690aa2e0792895c /arch/x86/kernel/cpu | |
| parent | 2eaa9cfdf33b8d7fb7aff27792192e0019ae8fc6 (diff) | |
| download | linux-stable-5958f1d5d722df7a9e5d129676614a8e5219bacd.tar.gz linux-stable-5958f1d5d722df7a9e5d129676614a8e5219bacd.tar.bz2 linux-stable-5958f1d5d722df7a9e5d129676614a8e5219bacd.zip | |
x86, cpu: Add AMD core boosting feature flag to /proc/cpuinfo
By semi-popular demand, this adds the Core Performance Boost feature
flag to /proc/cpuinfo. Possible use case for this is userspace tools
like cpufreq-aperf, for example, so that they don't have to jump through
hoops of accessing "/dev/cpu/%d/cpuid" in order to check for CPB hw
support, or call cpuid from userspace.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <1270065406-1814-2-git-send-email-bp@amd64.org>
Reviewed-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel/cpu')
| -rw-r--r-- | arch/x86/kernel/cpu/addon_cpuid_features.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c index 97ad79cdf688..ead2a1cfa570 100644 --- a/arch/x86/kernel/cpu/addon_cpuid_features.c +++ b/arch/x86/kernel/cpu/addon_cpuid_features.c @@ -30,8 +30,9 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c) const struct cpuid_bit *cb; static const struct cpuid_bit __cpuinitconst cpuid_bits[] = { - { X86_FEATURE_IDA, CR_EAX, 1, 0x00000006 }, - { X86_FEATURE_ARAT, CR_EAX, 2, 0x00000006 }, + { X86_FEATURE_IDA, CR_EAX, 1, 0x00000006 }, + { X86_FEATURE_ARAT, CR_EAX, 2, 0x00000006 }, + { X86_FEATURE_CPB, CR_EDX, 9, 0x80000007 }, { X86_FEATURE_NPT, CR_EDX, 0, 0x8000000a }, { X86_FEATURE_LBRV, CR_EDX, 1, 0x8000000a }, { X86_FEATURE_SVML, CR_EDX, 2, 0x8000000a }, |