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| author | Mark Johnston <markj@FreeBSD.org> | 2023-04-25 17:33:08 +0000 |
|---|---|---|
| committer | Mark Johnston <markj@FreeBSD.org> | 2023-05-09 14:01:05 +0000 |
| commit | 7e06b2f3ecd7001014115f66f53406b9cfee6e19 (patch) | |
| tree | 88f3785b756a768fb4de38cef35f46f5417a3261 | |
| parent | cb5ea040be733fbd3da6490c545c0b4eae43f624 (diff) | |
| download | src-7e06b2f3ecd7001014115f66f53406b9cfee6e19.tar.gz src-7e06b2f3ecd7001014115f66f53406b9cfee6e19.zip | |
vmm: Expose some more AVX512 CPUID bits to guests
This is required to announce support for some accelerated AES
operations. AVX512BW indicates support for the AVX512-FP16 extension
and AVX512VL indicates support for the use of AVX512 instructions with
vector lengths smaller than 512 bits.
VAES and VPCLMULQDQ extensions indicate that VEX-prefixed AES-NI and
pclmulqdq instructions are supported.
All of these bits are needed for OpenSSL to use VAES to accelerate
AES-GCM transforms.
Reviewed by: corvink, kib, jhb
MFC after: 2 weeks
Sponsored by: Stormshield
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D39781
(cherry picked from commit 47cf1b37f42d2acb24fa3a1e6106374dddb3edbf)
| -rw-r--r-- | sys/amd64/vmm/x86.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/sys/amd64/vmm/x86.c b/sys/amd64/vmm/x86.c index d99fb391afba..265d9f6951a0 100644 --- a/sys/amd64/vmm/x86.c +++ b/sys/amd64/vmm/x86.c @@ -441,18 +441,22 @@ x86_emulate_cpuid(struct vcpu *vcpu, uint64_t *rax, uint64_t *rbx, /* * Expose known-safe features. */ - regs[1] &= (CPUID_STDEXT_FSGSBASE | + regs[1] &= CPUID_STDEXT_FSGSBASE | CPUID_STDEXT_BMI1 | CPUID_STDEXT_HLE | CPUID_STDEXT_AVX2 | CPUID_STDEXT_SMEP | CPUID_STDEXT_BMI2 | CPUID_STDEXT_ERMS | CPUID_STDEXT_RTM | CPUID_STDEXT_AVX512F | + CPUID_STDEXT_AVX512DQ | CPUID_STDEXT_RDSEED | CPUID_STDEXT_SMAP | CPUID_STDEXT_AVX512PF | CPUID_STDEXT_AVX512ER | - CPUID_STDEXT_AVX512CD | CPUID_STDEXT_SHA); - regs[2] = 0; + CPUID_STDEXT_AVX512CD | CPUID_STDEXT_SHA | + CPUID_STDEXT_AVX512BW | + CPUID_STDEXT_AVX512VL; + regs[2] &= CPUID_STDEXT2_VAES | + CPUID_STDEXT2_VPCLMULQDQ; regs[3] &= CPUID_STDEXT3_MD_CLEAR; /* Advertise RDPID if it is enabled. */ |