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[v3,4/8] KVM: x86: Clear AVX-512 xfeatures if SSE or AVX is clear

Message ID 20230224223607.1580880-5-aaronlewis@google.com (mailing list archive)
State New, archived
Headers show
Series Clean up the supported xfeatures | expand

Commit Message

Aaron Lewis Feb. 24, 2023, 10:36 p.m. UTC 
A requirement for setting AVX-512 is to have both SSE and AVX enabled.
Add these masks to ensure AVX-512 gets cleared if either SSE or AVX
are clear.

Signed-off-by: Aaron Lewis <aaronlewis@google.com>
---
 arch/x86/kvm/cpuid.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 76379a51a16d..1eff76f836a2 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -68,7 +68,7 @@  static u64 sanitize_xcr0(u64 xcr0)
 	if ((xcr0 & mask) != mask)
 		xcr0 &= ~mask;
 
-	mask = XFEATURE_MASK_AVX512;
+	mask = XFEATURE_MASK_AVX512 | XFEATURE_MASK_SSE | XFEATURE_MASK_YMM;
 	if ((xcr0 & mask) != mask)
 		xcr0 &= ~XFEATURE_MASK_AVX512;