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| author | Like Xu <like.xu.linux@gmail.com> | 2021-06-28 15:43:54 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-28 14:35:34 +0200 |
| commit | a87d42ae7f5db37fe3a1f93a6fcb28befe66d7fc (patch) | |
| tree | 4cd90dd6908d1c1ab7672c7337f4647e3cbc4c6a | |
| parent | b990585f9b7a81f7eaa7d63b353037159d6c5ddb (diff) | |
| download | kernel_replicant_linux-a87d42ae7f5db37fe3a1f93a6fcb28befe66d7fc.tar.gz kernel_replicant_linux-a87d42ae7f5db37fe3a1f93a6fcb28befe66d7fc.tar.bz2 kernel_replicant_linux-a87d42ae7f5db37fe3a1f93a6fcb28befe66d7fc.zip | |
KVM: x86/pmu: Clear anythread deprecated bit when 0xa leaf is unsupported on the SVM
[ 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: 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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 7a3fbf3b796e..41b0dc37720e 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -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; |