diff options
| author | Zhao Liu <zhao1.liu@intel.com> | 2025-11-20 13:07:20 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-01-23 10:00:02 -0800 |
| commit | 062768f426895b958417c85582826e20c44f477c (patch) | |
| tree | 9fa05efeb42fbda93f4f7c1fe2904214a80331d0 /rust/alloc/collections/git@git.tavy.me:linux.git | |
| parent | 2ff8fb1e65e1a97f75f15935f84b9d2882a49623 (diff) | |
KVM: x86: Advertise AVX10_VNNI_INT CPUID to userspace
Define and advertise AVX10_VNNI_INT CPUID to userspace when it's supported
by the host.
AVX10_VNNI_INT (0x24.0x1.ECX[bit 2]) is a discrete feature bit
introduced on Intel Diamond Rapids, which enumerates the support for
EVEX VPDP* instructions for INT8/INT16 [*].
Since this feature has no actual kernel usages, define it as a KVM-only
feature in reverse_cpuid.h.
Advertise new CPUID subleaf 0x24.0x1 with AVX10_VNNI_INT bit to
userspace for guest use. It's safe since no additional enabling work
is needed in the host kernel.
[*]: Intel Advanced Vector Extensions 10.2 Architecture Specification
(rev 5.0).
Tested-by: Xudong Hao <xudong.hao@intel.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://patch.msgid.link/20251120050720.931449-5-zhao1.liu@intel.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'rust/alloc/collections/git@git.tavy.me:linux.git')
0 files changed, 0 insertions, 0 deletions