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qemu-testsuite.10216
0166-target-i386-define-md-clear-bit.patch
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File 0166-target-i386-define-md-clear-bit.patch of Package qemu-testsuite.10216
From ab13f2f61cc4a4cd2c5d74669ed8785fa83942de Mon Sep 17 00:00:00 2001 From: Paolo Bonzini <pbonzini@redhat.com> Date: Fri, 1 Mar 2019 21:40:52 +0100 Subject: [PATCH] target/i386: define md-clear bit md-clear is a new CPUID bit which is set when microcode provides the mechanism to invoke a flush of various exploitable CPU buffers by invoking the VERW instruction. Add the new feature. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> [BR: BSC#1111331 CVE-2018-12126 CVE-2018-12127 CVE-2018-12130 CVE-2019-11091] Signed-off-by: Bruce Rogers <brogers@suse.com> --- target/i386/cpu.c | 2 +- target/i386/cpu.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 7abe9f59b6..ea8c2d2602 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -456,7 +456,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = { .feat_names = { NULL, NULL, "avx512-4vnniw", "avx512-4fmaps", NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, + NULL, NULL, "md-clear", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 0834e53a4b..3cc148833a 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -642,6 +642,7 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS]; #define CPUID_7_0_EDX_AVX512_4VNNIW (1U << 2) /* AVX512 Neural Network Instructions */ #define CPUID_7_0_EDX_AVX512_4FMAPS (1U << 3) /* AVX512 Multiply Accumulation Single Precision */ +#define CPUID_7_0_EDX_MD_CLEAR (1U << 10) /* Microarchitectural Data Clear */ #define CPUID_7_0_EDX_SPEC_CTRL (1U << 26) /* Speculation Control */ #define CPUID_7_0_EDX_SPEC_CTRL_SSBD (1U << 31) /* Speculative Store Bypass Disable */
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