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From: "Daniel P. Berrangé" <berrange@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>,
	"Richard Henderson" <rth@twiddle.net>,
	kvm@vger.kernel.org, "Eduardo Habkost" <ehabkost@redhat.com>,
	"Marcelo Tosatti" <mtosatti@redhat.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Daniel P . Berrangé" <berrange@redhat.com>
Subject: [Qemu-devel] [PATCH 2/3] i386: define the AMD 'virt-ssbd' CPUID feature bit (CVE-2018-3639)
Date: Mon, 21 May 2018 22:54:23 +0100	[thread overview]
Message-ID: <20180521215424.13520-3-berrange@redhat.com> (raw)
In-Reply-To: <20180521215424.13520-1-berrange@redhat.com>

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. Berrangé <berrange@redhat.com>
Signed-off-by: Daniel P. Berrangé <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_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,
-- 
2.17.0

  parent reply	other threads:[~2018-05-21 21:54 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-21 21:54 [Qemu-devel] [PATCH 0/3] i386: speculative store buffer bypass mitigation (CVE-2018-3639) Daniel P. Berrangé
2018-05-21 21:54 ` [Qemu-devel] [PATCH 1/3] i386: define the 'ssbd' CPUID feature bit (CVE-2018-3639) Daniel P. Berrangé
2018-05-21 21:54 ` Daniel P. Berrangé [this message]
2018-05-21 21:54 ` [Qemu-devel] [PATCH 3/3] i386: Define the Virt SSBD MSR and handling of it (CVE-2018-3639) Daniel P. Berrangé
2018-05-21 21:59 ` [Qemu-devel] [PATCH 0/3] i386: speculative store buffer bypass mitigation (CVE-2018-3639) Eduardo Habkost

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