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x86/intel_rdt/mba: Memory bandwith allocation feature detect

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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>
This commit is contained in:
Vikas Shivappa
2017-04-07 17:33:52 -07:00
committed by Thomas Gleixner
parent 0921c54769
commit ab66a33b03
4 changed files with 15 additions and 0 deletions
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8
arch/x86/include/asm/intel_rdt.h
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@@ -184,6 +184,14 @@ union cpuid_0x10_1_eax {
unsigned int full;
};
/* CPUID.(EAX=10H, ECX=ResID=3).EAX */
union cpuid_0x10_3_eax {
struct {
unsigned int max_delay:12;
} split;
unsigned int full;
};
/* CPUID.(EAX=10H, ECX=ResID).EDX */
union cpuid_0x10_x_edx {
struct {