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target/i386: define a new MSR based feature word - FEAT_PERF_CAPABILITIES

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The Perfmon and Debug Capability MSR named IA32_PERF_CAPABILITIES is
a feature-enumerating MSR, which only enumerates the feature full-width
write (via bit 13) by now which indicates the processor supports IA32_A_PMCx
interface for updating bits 32 and above of IA32_PMCx.

The existence of MSR IA32_PERF_CAPABILITIES is enumerated by CPUID.1:ECX[15].

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: qemu-devel@nongnu.org
Signed-off-by: Like Xu <like.xu@linux.intel.com>
Message-Id: <20200529074347.124619-5-like.xu@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Like Xu 2020-05-29 15:43:47 +08:00 • committed by Paolo Bonzini
parent 20c8fa2ec7
commit ea39f9b643
3 changed files with 46 additions and 0 deletions
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3
target/i386/cpu.h
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@ -356,6 +356,8 @@ typedef enum X86Seg {
#define MSR_IA32_ARCH_CAPABILITIES 0x10a
#define ARCH_CAP_TSX_CTRL_MSR (1<<7)
#define MSR_IA32_PERF_CAPABILITIES 0x345
#define MSR_IA32_TSX_CTRL 0x122
#define MSR_IA32_TSCDEADLINE 0x6e0
@ -529,6 +531,7 @@ typedef enum FeatureWord {
FEAT_XSAVE_COMP_HI, /* CPUID[EAX=0xd,ECX=0].EDX */
FEAT_ARCH_CAPABILITIES,
FEAT_CORE_CAPABILITY,
FEAT_PERF_CAPABILITIES,
FEAT_VMX_PROCBASED_CTLS,
FEAT_VMX_SECONDARY_CTLS,
FEAT_VMX_PINBASED_CTLS,