The patch titled
x86, cpu: add AMD core boosting feature flag to /proc/cpuinfo
has been removed from the -mm tree. Its filename was
x86-cpu-add-amd-core-boosting-feature-flag-to-proc-cpuinfo.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: x86, cpu: add AMD core boosting feature flag to /proc/cpuinfo
From: Borislav Petkov <borislav.petkov@xxxxxxx>
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@xxxxxxx>
Reviewed-by: Thomas Renninger <trenn@xxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Dave Jones <davej@xxxxxxxxxxxxxxxxx>
Cc: Mark Langsdorf <mark.langsdorf@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/cpufeature.h | 1 +
arch/x86/kernel/cpu/addon_cpuid_features.c | 5 +++--
2 files changed, 4 insertions(+), 2 deletions(-)
diff -puN arch/x86/include/asm/cpufeature.h~x86-cpu-add-amd-core-boosting-feature-flag-to-proc-cpuinfo arch/x86/include/asm/cpufeature.h
--- a/arch/x86/include/asm/cpufeature.h~x86-cpu-add-amd-core-boosting-feature-flag-to-proc-cpuinfo
+++ a/arch/x86/include/asm/cpufeature.h
@@ -161,6 +161,7 @@
*/
#define X86_FEATURE_IDA (7*32+ 0) /* Intel Dynamic Acceleration */
#define X86_FEATURE_ARAT (7*32+ 1) /* Always Running APIC Timer */
+#define X86_FEATURE_CPB (7*32+ 2) /* AMD Core Performance Boost */
/* Virtualization flags: Linux defined */
#define X86_FEATURE_TPR_SHADOW (8*32+ 0) /* Intel TPR Shadow */
diff -puN arch/x86/kernel/cpu/addon_cpuid_features.c~x86-cpu-add-amd-core-boosting-feature-flag-to-proc-cpuinfo arch/x86/kernel/cpu/addon_cpuid_features.c
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c~x86-cpu-add-amd-core-boosting-feature-flag-to-proc-cpuinfo
+++ a/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -30,8 +30,9 @@ void __cpuinit init_scattered_cpuid_feat
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 },
_
Patches currently in -mm which might be from borislav.petkov@xxxxxxx are
linux-next.patch
x86-add-optimized-popcnt-variants.patch
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