From de8cb5ded43603937e0e7c341fcd7521822328a6 Mon Sep 17 00:00:00 2001

From: Paolo Bonzini <pbonzini@redhat.com>

Date: Sat, 2 Mar 2019 00:07:10 +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.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

(cherry-picked from a private commit)

---

 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 d6bb57d210..4ea78a4939 100644

--- a/target/i386/cpu.c

+++ b/target/i386/cpu.c

@@ -1076,7 +1076,7 @@ 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