[Qemu-stable] [PATCH 108/113] i386: define the AMD 'virt-ssbd' CPUID feature bit (CVE-2018-3639)

[Michael Roth]

From: Konrad Rzeszutek Wilk <address@hidden>

AMD Zen expose the Intel equivalant to Speculative Store Bypass Disable
via the 0x80000008_EBX[25] CPUID feature bit.

This needs to be exposed to guest OS to allow them to protect
against CVE-2018-3639.

Signed-off-by: Konrad Rzeszutek Wilk <address@hidden>
Reviewed-by: Daniel P. Berrangé <address@hidden>
Signed-off-by: Daniel P. Berrangé <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Eduardo Habkost <address@hidden>
(cherry picked from commit 403503b162ffc33fb64cfefdf7b880acf41772cd)
Signed-off-by: Michael Roth <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 bc087e95c3..1acf300cf8 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -490,7 +490,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             "ibpb", NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
-            NULL, NULL, NULL, NULL,
+            NULL, "virt-ssbd", NULL, NULL,
             NULL, NULL, NULL, NULL,
         },
         .cpuid_eax = 0x80000008,
-- 
2.11.0