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From c432e7520c4410545d5883f2a5be5dcecbf1854d Mon Sep 17 00:00:00 2001
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From: Eduardo Habkost <ehabkost@redhat.com>
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Date: Mon, 6 Jan 2020 13:04:21 +0100
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Subject: [PATCH] target/i386: add MDS-NO feature
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RH-Author: Eduardo Habkost <ehabkost@redhat.com>
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Message-id: <20191024031525.7449-1-ehabkost@redhat.com>
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Patchwork-id: 91937
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O-Subject: [RHEL-7.7.z qemu-kvm PATCH] target/i386: add MDS-NO feature
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Bugzilla: 1755333
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RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
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RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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From: Paolo Bonzini <pbonzini@redhat.com>
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Microarchitectural Data Sampling is a hardware vulnerability which allows
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unprivileged speculative access to data which is available in various CPU
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internal buffers.
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Some Intel processors use the ARCH_CAP_MDS_NO bit in the
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IA32_ARCH_CAPABILITIES
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MSR to report that they are not vulnerable, make it available to guests.
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Message-Id: <20190516185320.28340-1-pbonzini@redhat.com>
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Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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(cherry picked from commit 20140a82c67467f53814ca197403d5e1b561a5e5)
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Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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---
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target-i386/cpu.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/target-i386/cpu.c b/target-i386/cpu.c
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index 48d3aec..63ae76e 100644
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--- a/target-i386/cpu.c
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+++ b/target-i386/cpu.c
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@@ -200,7 +200,7 @@ static const char *cpuid_xsave_feature_name[] = {
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static const char *cpuid_arch_capabilities_feature_name[] = {
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"rdctl-no", "ibrs-all", "rsba", "skip-l1dfl-vmentry",
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- "ssb-no", NULL, NULL, "tsx-ctrl",
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+ "ssb-no", "mds-no", NULL, "tsx-ctrl",
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"taa-no", NULL, NULL, NULL,
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NULL, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL,
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--
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1.8.3.1
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