AVX-VNNI-INT16 is a new set of instructions in the latest Intel platform
Clearwater Forest, which can multiply and add unsigned and signed words
with and without saturation.
AVX-VNNI-INT16 is enumerated via CPUID.(EAX=7,ECX=1):EDX[bit 10].
Advertise AVX-VNNI-INT16 if it's supported in hardware. There are no new
VMX controls for the feature, i.e. the instructions can't be intercepted
and only use xmm, ymm registers.
Tested-by: Jiaan Lu <jiaan.lu@xxxxxxxxx>
Tested-by: Xuelian Guo <xuelian.guo@xxxxxxxxx>
Signed-off-by: Tao Su <tao1.su@xxxxxxxxxxxxxxx>
---
arch/x86/kvm/cpuid.c | 4 ++--
arch/x86/kvm/reverse_cpuid.h | 1 +
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 160b060121b2..68cde739a5a3 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -704,8 +704,8 @@ void kvm_set_cpu_caps(void)
);
kvm_cpu_cap_init_kvm_defined(CPUID_7_1_EDX,
- F(AVX_VNNI_INT8) | F(AVX_NE_CONVERT) | F(PREFETCHITI) |
- F(AMX_COMPLEX) | F(AVX10)
+ F(AVX_VNNI_INT8) | F(AVX_NE_CONVERT) | F(AMX_COMPLEX) |
+ F(AVX_VNNI_INT16) | F(PREFETCHITI) | F(AVX10)
);
kvm_cpu_cap_init_kvm_defined(CPUID_7_2_EDX,
diff --git a/arch/x86/kvm/reverse_cpuid.h b/arch/x86/kvm/reverse_cpuid.h
index 0d17d6b70639..e46220ece83c 100644
--- a/arch/x86/kvm/reverse_cpuid.h
+++ b/arch/x86/kvm/reverse_cpuid.h
@@ -46,6 +46,7 @@ enum kvm_only_cpuid_leafs {
#define X86_FEATURE_AVX_VNNI_INT8 KVM_X86_FEATURE(CPUID_7_1_EDX, 4)
#define X86_FEATURE_AVX_NE_CONVERT KVM_X86_FEATURE(CPUID_7_1_EDX, 5)
#define X86_FEATURE_AMX_COMPLEX KVM_X86_FEATURE(CPUID_7_1_EDX, 8)
+#define X86_FEATURE_AVX_VNNI_INT16 KVM_X86_FEATURE(CPUID_7_1_EDX, 10)
#define X86_FEATURE_PREFETCHITI KVM_X86_FEATURE(CPUID_7_1_EDX, 14)
#define X86_FEATURE_AVX10 KVM_X86_FEATURE(CPUID_7_1_EDX, 19)
--
2.34.1
