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KVM: x86/pmu: Clear anythread deprecated bit when 0xa leaf is unsupported on the SVM

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[ Upstream commit 7234c362ccb3c2228f06f19f93b132de9cfa7ae4 ]

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: cadbaa039b ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Like Xu
2021-06-28 15:43:54 +08:00
committed by Greg Kroah-Hartman
parent b990585f9b
commit a87d42ae7f
1 changed files with 2 additions and 1 deletions
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arch/x86/kvm/cpuid.c
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@@ -684,7 +684,8 @@ 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;