linux-kernel - [PATCH] x86/cpufeatures: Make AVX-VNNI depend on AVX

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Message-ID: <20250220060124.89622-1-ebiggers@kernel.org>
Date: Wed, 19 Feb 2025 22:01:24 -0800
From: Eric Biggers <ebiggers@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] x86/cpufeatures: Make AVX-VNNI depend on AVX

From: Eric Biggers <ebiggers@...gle.com>

The noxsave option disables support for AVX, but support for the
AVX-VNNI feature was still declared on CPUs that support it.  Fix this.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
 arch/x86/kernel/cpu/cpuid-deps.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/cpuid-deps.c b/arch/x86/kernel/cpu/cpuid-deps.c
index 8bd84114c2d96..df838e3bdbe02 100644
--- a/arch/x86/kernel/cpu/cpuid-deps.c
+++ b/arch/x86/kernel/cpu/cpuid-deps.c
@@ -43,10 +43,11 @@ static const struct cpuid_dep cpuid_deps[] = {
 	{ X86_FEATURE_SSSE3,			X86_FEATURE_XMM2,     },
 	{ X86_FEATURE_F16C,			X86_FEATURE_XMM2,     },
 	{ X86_FEATURE_AES,			X86_FEATURE_XMM2      },
 	{ X86_FEATURE_SHA_NI,			X86_FEATURE_XMM2      },
 	{ X86_FEATURE_GFNI,			X86_FEATURE_XMM2      },
+	{ X86_FEATURE_AVX_VNNI,			X86_FEATURE_AVX       },
 	{ X86_FEATURE_FMA,			X86_FEATURE_AVX       },
 	{ X86_FEATURE_VAES,			X86_FEATURE_AVX       },
 	{ X86_FEATURE_VPCLMULQDQ,		X86_FEATURE_AVX       },
 	{ X86_FEATURE_AVX2,			X86_FEATURE_AVX,      },
 	{ X86_FEATURE_AVX512F,			X86_FEATURE_AVX,      },

base-commit: 87a132e73910e8689902aed7f2fc229d6908383b
-- 
2.48.1