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authorLike Xu <like.xu.linux@gmail.com>2021-06-28 10:43:54 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2021-07-14 19:17:56 +0300
commit7234c362ccb3c2228f06f19f93b132de9cfa7ae4 (patch)
tree0f75c65ee13985bdab037ae197fd5ec580d1c5ea
parent23fa2e46a5556f787ce2ea1a315d3ab93cced204 (diff)
downloadlinux-7234c362ccb3c2228f06f19f93b132de9cfa7ae4.tar.xz
KVM: x86/pmu: Clear anythread deprecated bit when 0xa leaf is unsupported on the SVM
The AMD platform does not support the functions Ah CPUID leaf. The returned results for this entry should all remain zero just like the native does: AMD host: 0x0000000a 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000 (uncanny) AMD guest: 0x0000000a 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00008000 Fixes: cadbaa039b99 ("perf/x86/intel: Make anythread filter support conditional") Signed-off-by: Like Xu <likexu@tencent.com> Message-Id: <20210628074354.33848-1-likexu@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r--arch/x86/kvm/cpuid.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index ca7866d63e98..739be5da3bca 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -765,7 +765,8 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function)
edx.split.num_counters_fixed = min(cap.num_counters_fixed, MAX_FIXED_COUNTERS);
edx.split.bit_width_fixed = cap.bit_width_fixed;
- edx.split.anythread_deprecated = 1;
+ if (cap.version)
+ edx.split.anythread_deprecated = 1;
edx.split.reserved1 = 0;
edx.split.reserved2 = 0;