From: "Daniel P. Berrangé" <berrange@redhat.com>
To: qemu-devel@nongnu.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Eduardo Habkost <ehabkost@redhat.com>,
Richard Henderson <rth@twiddle.net>
Subject: [Qemu-devel] [PATCH 1/2] target/i386: define md-clear bit
Date: Wed, 15 May 2019 15:10:10 +0100 [thread overview]
Message-ID: <20190515141011.5315-2-berrange@redhat.com> (raw)
In-Reply-To: <20190515141011.5315-1-berrange@redhat.com>
From: Paolo Bonzini <pbonzini@redhat.com>
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.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
target/i386/cpu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 722c5514d4..4fa67bcfaf 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1077,7 +1077,7 @@ 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,
--
2.21.0
next prev parent reply other threads:[~2019-05-15 14:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-15 14:10 [Qemu-devel] [PATCH 0/2] x86/cpu: add "md-clear" feature for MDS security flaws Daniel P. Berrangé
2019-05-15 14:10 ` Daniel P. Berrangé [this message]
2019-05-15 14:10 ` [Qemu-devel] [PATCH 2/2] docs: recommend use of md-clear feature on all Intel CPUs Daniel P. Berrangé
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