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target/i386: add MDS-NO feature

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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.

Backports commit 20140a82c67467f53814ca197403d5e1b561a5e5 from qemu
This commit is contained in:
Paolo Bonzini 2019-05-23 14:49:17 -04:00 committed by Lioncash
parent a4f2517f46
commit 1341e371a8
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 1 additions and 1 deletions
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qemu/target/i386/cpu.c
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@ -1198,7 +1198,7 @@ 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,