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[PULL 04/12] target/i386: Export TAA_NO bit to guests


From: Paolo Bonzini
Subject: [PULL 04/12] target/i386: Export TAA_NO bit to guests
Date: Tue, 19 Nov 2019 17:08:40 +0100

From: Pawan Gupta <address@hidden>

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 <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
 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 2f60df3..296b491 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1205,7 +1205,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = 
{
         .feat_names = {
             "rdctl-no", "ibrs-all", "rsba", "skip-l1dfl-vmentry",
             "ssb-no", "mds-no", "pschange-mc-no", 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





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