From 354818b02978df635ea030462223283529711970 Mon Sep 17 00:00:00 2001

From: Paolo Bonzini <pbonzini@redhat.com>

Date: Sun, 23 Jun 2019 15:19:12 +0200

Subject: [PATCH 1/4] target/i386: add MDS-NO feature

RH-Author: Paolo Bonzini <pbonzini@redhat.com>

Message-id: <20190623151912.7829-1-pbonzini@redhat.com>

Patchwork-id: 88872

O-Subject: [RHEL-8.1.0 PATCH qemu-kvm] target/i386: add MDS-NO feature

Bugzilla: 1714792

RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>

RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>

Bugzilla: 1714792

Brew build: 22307357

Microarchitectural Data Sampling is a hardware vulnerability which allows

unprivileged speculative access to data which is available in various CPU

internal buffers.

Some Intel processors use the ARCH_CAP_MDS_NO bit in the

IA32_ARCH_CAPABILITIES

MSR to report that they are not vulnerable, make it available to guests.

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

Message-Id: <20190516185320.28340-1-pbonzini@redhat.com>

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

(cherry picked from commit 20140a82c67467f53814ca197403d5e1b561a5e5)

Signed-off-by: Miroslav Rezanina <mrezanin@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 4411012..5c10093 100644

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

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

@@ -1147,7 +1147,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {

         .type = MSR_FEATURE_WORD,

         .feat_names = {

             "rdctl-no", "ibrs-all", "rsba", "skip-l1dfl-vmentry",

-            "ssb-no", NULL, NULL, NULL,

+            "ssb-no", "mds-no", NULL, NULL,

             NULL, NULL, NULL, NULL,

             NULL, NULL, NULL, NULL,

             NULL, NULL, NULL, NULL,

-- 

1.8.3.1