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| author | Vikas Shivappa <vikas.shivappa@linux.intel.com> | 2017-04-07 17:33:52 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-04-14 16:10:07 +0200 |
| commit | ab66a33b032eb5b8186aeaf648127bce829c9efd (patch) | |
| tree | a1f00dae07781ba70b1de95735832abc68a1335d /arch/x86/kernel/cpu/intel_rdt.c | |
| parent | 0921c54769bac209b302027384e9dc081198c8f5 (diff) | |
| download | linux-ab66a33b032eb5b8186aeaf648127bce829c9efd.tar.gz linux-ab66a33b032eb5b8186aeaf648127bce829c9efd.tar.bz2 linux-ab66a33b032eb5b8186aeaf648127bce829c9efd.zip | |
x86/intel_rdt/mba: Memory bandwith allocation feature detect
Detect MBA feature if CPUID.(EAX=10H, ECX=0):EBX.L2[bit 3] = 1.
Add supporting data structures to detect feature details which is done
in later patch using CPUID with EAX=10H, ECX= 3.
Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Cc: ravi.v.shankar@intel.com
Cc: tony.luck@intel.com
Cc: fenghua.yu@intel.com
Cc: vikas.shivappa@intel.com
Link: http://lkml.kernel.org/r/1491611637-20417-4-git-send-email-vikas.shivappa@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/cpu/intel_rdt.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_rdt.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c index 8486abe40c3f..82eafd643632 100644 --- a/arch/x86/kernel/cpu/intel_rdt.c +++ b/arch/x86/kernel/cpu/intel_rdt.c @@ -430,6 +430,10 @@ static __init bool get_rdt_resources(void) rdt_get_cache_config(2, &rdt_resources_all[RDT_RESOURCE_L2]); ret = true; } + + if (boot_cpu_has(X86_FEATURE_MBA)) + ret = true; + return ret; } |