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| author | Fenghua Yu <fenghua.yu@intel.com> | 2016-10-22 06:19:51 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-10-26 23:12:38 +0200 |
| commit | 4ab1586488cb56ed8728e54c4157cc38646874d9 (patch) | |
| tree | e11da9a77f2d2f66930a06792124ac8af1d6475e /arch/x86/kernel/cpu/scattered.c | |
| parent | d57e3ab7e34c51a8badeea1b500bfb738d0af66e (diff) | |
| download | op-kernel-dev-4ab1586488cb56ed8728e54c4157cc38646874d9.zip op-kernel-dev-4ab1586488cb56ed8728e54c4157cc38646874d9.tar.gz | |
x86/cpufeature: Add RDT CPUID feature bits
Check CPUID leaves for all the Resource Director Technology (RDT)
Cache Allocation Technology (CAT) bits.
Presence of allocation features:
CPUID.(EAX=7H, ECX=0):EBX[bit 15] X86_FEATURE_RDT_A
L2 and L3 caches are each separately enabled:
CPUID.(EAX=10H, ECX=0):EBX[bit 1] X86_FEATURE_CAT_L3
CPUID.(EAX=10H, ECX=0):EBX[bit 2] X86_FEATURE_CAT_L2
L3 cache may support independent control of allocation for
code and data (CDP = Code/Data Prioritization):
CPUID.(EAX=10H, ECX=1):ECX[bit 2] X86_FEATURE_CDP_L3
[ tglx: Fixed up Borislavs comments and moved the feature bits into a gap ]
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Acked-by: "Borislav Petkov" <bp@suse.de>
Cc: "Ravi V Shankar" <ravi.v.shankar@intel.com>
Cc: "Tony Luck" <tony.luck@intel.com>
Cc: "David Carrillo-Cisneros" <davidcc@google.com>
Cc: "Sai Prakhya" <sai.praneeth.prakhya@intel.com>
Cc: "Peter Zijlstra" <peterz@infradead.org>
Cc: "Stephane Eranian" <eranian@google.com>
Cc: "Dave Hansen" <dave.hansen@intel.com>
Cc: "Shaohua Li" <shli@fb.com>
Cc: "Nilay Vaish" <nilayvaish@gmail.com>
Cc: "Vikas Shivappa" <vikas.shivappa@linux.intel.com>
Cc: "Ingo Molnar" <mingo@elte.hu>
Cc: "H. Peter Anvin" <h.peter.anvin@intel.com>
Link: http://lkml.kernel.org/r/1477142405-32078-5-git-send-email-fenghua.yu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/cpu/scattered.c')
| -rw-r--r-- | arch/x86/kernel/cpu/scattered.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c index 1db8dc4..49fb680 100644 --- a/arch/x86/kernel/cpu/scattered.c +++ b/arch/x86/kernel/cpu/scattered.c @@ -36,6 +36,9 @@ void init_scattered_cpuid_features(struct cpuinfo_x86 *c) { X86_FEATURE_AVX512_4FMAPS, CR_EDX, 3, 0x00000007, 0 }, { X86_FEATURE_APERFMPERF, CR_ECX, 0, 0x00000006, 0 }, { X86_FEATURE_EPB, CR_ECX, 3, 0x00000006, 0 }, + { X86_FEATURE_CAT_L3, CR_EBX, 1, 0x00000010, 0 }, + { X86_FEATURE_CAT_L2, CR_EBX, 2, 0x00000010, 0 }, + { X86_FEATURE_CDP_L3, CR_ECX, 2, 0x00000010, 1 }, { X86_FEATURE_HW_PSTATE, CR_EDX, 7, 0x80000007, 0 }, { X86_FEATURE_CPB, CR_EDX, 9, 0x80000007, 0 }, { X86_FEATURE_PROC_FEEDBACK, CR_EDX,11, 0x80000007, 0 }, |
