From 60e3b6eb1a611ddfb35841881689f0f6e02db3d1 Mon Sep 17 00:00:00 2001

From: Danilo de Paula <ddepaula@redhat.com>

Date: Mon, 20 May 2019 18:29:57 +0100

Subject: [PATCH 5/5] target/i386: define md-clear bit

RH-Author: Danilo de Paula <ddepaula@redhat.com>

Message-id: <20190520182957.26425-1-ddepaula@redhat.com>

Patchwork-id: 88110

O-Subject: [RHEL-8 + RHEL-AV qemu-kvm PATCH] target/i386: define md-clear bit

Bugzilla: 1703302 1703308

From: Paolo Bonzini <pbonzini@redhat.com>

BZ: 1703310

BZ: 1703304

BZ: 1703297

BZ: 1707274

branch: rhel-av-8.1.0/master-4.0.0

BZ: 1705851

BZ: 1704542

BZ: 1704538

BZ: 1704534

branch: rhel-av-8.0.1

BZ: 1703308

BZ: 1703302

branch: rhel-8.1.0

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>

Signed-off-by: Danilo C. L. de Paula <ddepaula@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 77be7e8..e9025cd 100644

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

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

@@ -1040,7 +1040,7 @@ 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,

-- 

1.8.3.1