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[Qemu-devel] [PULL 3/3] i386: define the AMD 'virt-ssbd' CPUID feature b


From: Eduardo Habkost
Subject: [Qemu-devel] [PULL 3/3] i386: define the AMD 'virt-ssbd' CPUID feature bit (CVE-2018-3639)
Date: Mon, 21 May 2018 19:01:33 -0300

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>
---
 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 a1185b17d1..d95310ffd4 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -836,7 +836,7 @@ 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,
-- 
2.14.3




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