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

Message ID 1574179728-35535-5-git-send-email-pbonzini@redhat.com
State New
Headers show
Series [PULL,01/12] scripts: Detect git worktrees for get_maintainer.pl --git | expand

Commit Message

Paolo Bonzini Nov. 19, 2019, 4:08 p.m. UTC 
From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>

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 <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/cpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

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,