diff options
| author | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2025-09-09 20:28:25 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-02 13:39:00 +0200 |
| commit | 54270c1b29f2a6e16fea605fc0fcfcef54be11b6 (patch) | |
| tree | ee5a8708f2939fcdf21a33a1b5fe84abc80ba88c /arch/x86 | |
| parent | 2fab1e2af6c598bbfa796350668c626cfda0353e (diff) | |
KVM: SVM: Return TSA_SQ_NO and TSA_L1_NO bits in __do_cpuid_func()
Commit c334ae4a545a ("KVM: SVM: Advertise TSA CPUID bits to guests")
set VERW_CLEAR, TSA_SQ_NO and TSA_L1_NO kvm_caps bits that are
supposed to be provided to guest when it requests CPUID 0x80000021.
However, the latter two (in the %ecx register) are instead returned as
zeroes in __do_cpuid_func().
Return values of TSA_SQ_NO and TSA_L1_NO as set in the kvm_cpu_caps.
This fix is stable-only.
Cc: <stable@vger.kernel.org> # 5.15.y
Fixes: c334ae4a545a ("KVM: SVM: Advertise TSA CPUID bits to guests")
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86')
| -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 f85a1f7b7582..4a644fcb0334 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -1014,8 +1014,9 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) entry->eax = entry->ebx = entry->ecx = entry->edx = 0; break; case 0x80000021: - entry->ebx = entry->ecx = entry->edx = 0; + entry->ebx = entry->edx = 0; cpuid_entry_override(entry, CPUID_8000_0021_EAX); + cpuid_entry_override(entry, CPUID_8000_0021_ECX); break; /*Add support for Centaur's CPUID instruction*/ case 0xC0000000: |