[PATCH v1 19/23] KVM: x86: Allow FRED/LKGS/WRMSRNS to be exposed to guests

Xin Li
2023-11-08T19:00:32Z

Allow FRED/LKGS/WRMSRNS to be exposed to guests, thus a guest OS could see
these features when the guest is configured with FRED/LKGS/WRMSRNS in Qemu.

A qemu patch is required to expose FRED/LKGS/WRMSRNS to KVM guests.

Tested-by: Shan Kang <shan.kang@intel.com>
Signed-off-by: Xin Li <xin3.li@intel.com>
---
arch/x86/kvm/cpuid.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index dda6fc4cfae8..aa11b3e394ae 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -670,8 +670,8 @@ void kvm_set_cpu_caps(void)

kvm_cpu_cap_mask(CPUID_7_1_EAX,
F(AVX_VNNI) | F(AVX512_BF16) | F(CMPCCXADD) |
- F(FZRM) | F(FSRS) | F(FSRC) |
- F(AMX_FP16) | F(AVX_IFMA)
+ F(FZRM) | F(FSRS) | F(FSRC) | F(FRED) | F(LKGS) |
+ F(WRMSRNS) | F(AMX_FP16) | F(AVX_IFMA)
);

kvm_cpu_cap_init_kvm_defined(CPUID_7_1_EDX,
--
2.42.0