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charset="utf-8" When the PERFCORE is disabled with "-cpu host,-perfctr-core", it is reflected in in guest dmesg. [ 0.285136] Performance Events: AMD PMU driver. However, the guest CPUID indicates the PerfMonV2 is still available. CPU: Extended Performance Monitoring and Debugging (0x80000022): AMD performance monitoring V2 =3D true AMD LBR V2 =3D false AMD LBR stack & PMC freezing =3D false number of core perf ctrs =3D 0x6 (6) number of LBR stack entries =3D 0x0 (0) number of avail Northbridge perf ctrs =3D 0x0 (0) number of available UMC PMCs =3D 0x0 (0) active UMCs bitmask =3D 0x0 Disable PerfMonV2 in CPUID when PERFCORE is disabled. Suggested-by: Zhao Liu Fixes: 209b0ac12074 ("target/i386: Add PerfMonV2 feature bit") Signed-off-by: Dongli Zhang Reviewed-by: Xiaoyao Li Reviewed-by: Zhao Liu Reviewed-by: Sandipan Das --- Changed since v1: - Use feature_dependencies (suggested by Zhao Liu). Changed since v2: - Nothing. Zhao and Xiaoyao may move it to x86_cpu_expand_features() later. target/i386/cpu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 6417775786..3653f8953e 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1994,6 +1994,10 @@ static FeatureDep feature_dependencies[] =3D { .from =3D { FEAT_7_1_EDX, CPUID_7_1_EDX_AVX10 }, .to =3D { FEAT_24_0_EBX, ~0ull }, }, + { + .from =3D { FEAT_8000_0001_ECX, CPUID_EXT3_PERFCORE }, + .to =3D { FEAT_8000_0022_EAX, CPUID_8000_0022_EAX_PERFMON_= V2 }, + }, }; =20 typedef struct X86RegisterInfo32 { --=20 2.39.3