commit 7fac38635e1cc5ebae34eb6530da1009bd5808e4
author Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Mon Nov 18 23:23:27 2019 -0800
committer Paolo Bonzini <pbonzini@redhat.com> Tue Nov 19 10:01:32 2019 +0100
tree 7eaede164c578b61da2b928b16a4089dfc1fe851
parent 7f7a585d5bd3c7f1275d28c77d9d67513c1de36c

target/i386: Export TAA_NO bit to guests

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

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 @@
         .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,