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| author | Yang Zhong <yang.zhong@intel.com> | 2021-01-05 01:49:09 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-04 11:27:16 +0100 |
| commit | 1085a6b585d7d1c441cd10fdb4c7a4d96a22eba7 (patch) | |
| tree | 62ad0e885c2b2067134cbbd0b94a486a0d783e35 /arch/x86/kvm/cpuid.c | |
| parent | Enumerate AVX Vector Neural Network instructions (diff) | |
| download | linux-1085a6b585d7d1c441cd10fdb4c7a4d96a22eba7.tar.xz linux-1085a6b585d7d1c441cd10fdb4c7a4d96a22eba7.zip | |
KVM: Expose AVX_VNNI instruction to guset
Expose AVX (VEX-encoded) versions of the Vector Neural Network
Instructions to guest.
The bit definition:
CPUID.(EAX=7,ECX=1):EAX[bit 4] AVX_VNNI
The following instructions are available when this feature is
present in the guest.
1. VPDPBUS: Multiply and Add Unsigned and Signed Bytes
2. VPDPBUSDS: Multiply and Add Unsigned and Signed Bytes with Saturation
3. VPDPWSSD: Multiply and Add Signed Word Integers
4. VPDPWSSDS: Multiply and Add Signed Integers with Saturation
This instruction is currently documented in the latest "extensions"
manual (ISE). It will appear in the "main" manual (SDM) in the future.
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Message-Id: <20210105004909.42000-3-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/cpuid.c')
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 38172ca627d3..ce658c9fa002 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -434,7 +434,7 @@ void kvm_set_cpu_caps(void) kvm_cpu_cap_set(X86_FEATURE_SPEC_CTRL_SSBD); kvm_cpu_cap_mask(CPUID_7_1_EAX, - F(AVX512_BF16) + F(AVX_VNNI) | F(AVX512_BF16) ); kvm_cpu_cap_mask(CPUID_D_1_EAX, |