diff options
| author | Borislav Petkov <borislav.petkov@amd.com> | 2010-03-31 15:56:41 -0400 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-04-09 17:05:23 -0400 |
| commit | 5958f1d5d722df7a9e5d129676614a8e5219bacd (patch) | |
| tree | 968c1fcc99d4653a313a9c5e5690aa2e0792895c /arch/x86 | |
| parent | 2eaa9cfdf33b8d7fb7aff27792192e0019ae8fc6 (diff) | |
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')
| -rw-r--r-- | arch/x86/include/asm/cpufeature.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/addon_cpuid_features.c | 5 |
2 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h index 0cd82d068613..630e623f61e0 100644 --- a/arch/x86/include/asm/cpufeature.h +++ b/arch/x86/include/asm/cpufeature.h | |||
| @@ -161,6 +161,7 @@ | |||
| 161 | */ | 161 | */ |
| 162 | #define X86_FEATURE_IDA (7*32+ 0) /* Intel Dynamic Acceleration */ | 162 | #define X86_FEATURE_IDA (7*32+ 0) /* Intel Dynamic Acceleration */ |
| 163 | #define X86_FEATURE_ARAT (7*32+ 1) /* Always Running APIC Timer */ | 163 | #define X86_FEATURE_ARAT (7*32+ 1) /* Always Running APIC Timer */ |
| 164 | #define X86_FEATURE_CPB (7*32+ 2) /* AMD Core Performance Boost */ | ||
| 164 | 165 | ||
| 165 | /* Virtualization flags: Linux defined */ | 166 | /* Virtualization flags: Linux defined */ |
| 166 | #define X86_FEATURE_TPR_SHADOW (8*32+ 0) /* Intel TPR Shadow */ | 167 | #define X86_FEATURE_TPR_SHADOW (8*32+ 0) /* Intel TPR Shadow */ |
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) | |||
| 30 | const struct cpuid_bit *cb; | 30 | const struct cpuid_bit *cb; |
| 31 | 31 | ||
| 32 | static const struct cpuid_bit __cpuinitconst cpuid_bits[] = { | 32 | static const struct cpuid_bit __cpuinitconst cpuid_bits[] = { |
| 33 | { X86_FEATURE_IDA, CR_EAX, 1, 0x00000006 }, | 33 | { X86_FEATURE_IDA, CR_EAX, 1, 0x00000006 }, |
| 34 | { X86_FEATURE_ARAT, CR_EAX, 2, 0x00000006 }, | 34 | { X86_FEATURE_ARAT, CR_EAX, 2, 0x00000006 }, |
| 35 | { X86_FEATURE_CPB, CR_EDX, 9, 0x80000007 }, | ||
| 35 | { X86_FEATURE_NPT, CR_EDX, 0, 0x8000000a }, | 36 | { X86_FEATURE_NPT, CR_EDX, 0, 0x8000000a }, |
| 36 | { X86_FEATURE_LBRV, CR_EDX, 1, 0x8000000a }, | 37 | { X86_FEATURE_LBRV, CR_EDX, 1, 0x8000000a }, |
| 37 | { X86_FEATURE_SVML, CR_EDX, 2, 0x8000000a }, | 38 | { X86_FEATURE_SVML, CR_EDX, 2, 0x8000000a }, |