From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>
Subject: [PATCH 2/3] i386: define the AMD 'virt-ssbd' CPUID
 feature bit (CVE-2018-3639)
Date: Mon, 21 May 2018 22:54:23 +0100
Message-ID: <20180521215424.13520-3-berrange@redhat.com>
References: <20180521215424.13520-1-berrange@redhat.com>
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Cc: Eduardo Habkost <ehabkost@redhat.com>, kvm@vger.kernel.org,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	Marcelo Tosatti <mtosatti@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>,
	Richard Henderson <rth@twiddle.net>
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From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

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 <konrad.wilk@oracle.com>
Reviewed-by: Daniel P. Berrang=C3=A9 <berrange@redhat.com>
Signed-off-by: Daniel P. Berrang=C3=A9 <berrange@redhat.com>
---
 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_WORD=
S] =3D {
             "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 =3D 0x80000008,
--=20
2.17.0