From 89c4aa9839e314a3ed45b377c8fb9a3b3fd78147 Mon Sep 17 00:00:00 2001 From: Eduardo Habkost Date: Tue, 3 Dec 2019 22:51:40 +0000 Subject: [PATCH 1/2] target/i386: Export TAA_NO bit to guests RH-Author: Eduardo Habkost Message-id: <20191203225141.501191-2-ehabkost@redhat.com> Patchwork-id: 92842 O-Subject: [RHEL-8.1.0 qemu-kvm PATCH 1/2] target/i386: Export TAA_NO bit to guests Bugzilla: 1771970 RH-Acked-by: Paolo Bonzini RH-Acked-by: Dr. David Alan Gilbert RH-Acked-by: Igor Mammedov From: Pawan Gupta TSX Async Abort (TAA) is a side channel attack on internal buffers in some Intel processors similar to Microachitectural Data Sampling (MDS). Some future Intel processors will use the ARCH_CAP_TAA_NO bit in the IA32_ARCH_CAPABILITIES MSR to report that they are not vulnerable to TAA. Make this bit available to guests. Signed-off-by: Pawan Gupta Signed-off-by: Paolo Bonzini (cherry picked from commit 7fac38635e1cc5ebae34eb6530da1009bd5808e4) Signed-off-by: Eduardo Habkost Signed-off-by: Danilo C. L. de Paula --- 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 c8f50a7..7baa5d2 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1148,7 +1148,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = { .feat_names = { "rdctl-no", "ibrs-all", "rsba", "skip-l1dfl-vmentry", "ssb-no", "mds-no", NULL, NULL, - NULL, NULL, NULL, NULL, + "taa-no", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, -- 1.8.3.1