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[Qemu-devel] [PATCH 2/2] i386: Define AMD's no SSB mitigation needed.
From: |
Konrad Rzeszutek Wilk |
Subject: |
[Qemu-devel] [PATCH 2/2] i386: Define AMD's no SSB mitigation needed. |
Date: |
Fri, 1 Jun 2018 11:38:09 -0400 |
AMD future CPUs expose a mechanism to tell the guest that the
Speculative Store Bypass Disable is not needed and that the
CPU is all good.
This is exposed via the CPUID 8000_0008.EBX[26] bit.
See 124441_AMD64_SpeculativeStoreBypassDisable_Whitepaper_final.pdf
A copy of this document is available at
https://bugzilla.kernel.org/show_bug.cgi?id=199889
Signed-off-by: Konrad Rzeszutek Wilk <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 f91990c..43b1532 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,
- "amd-ssbd", "virt-ssbd", NULL, NULL,
+ "amd-ssbd", "virt-ssbd", "amd-no-ssb", NULL,
NULL, NULL, NULL, NULL,
},
.cpuid_eax = 0x80000008,
--
1.8.3.1
- Re: [Qemu-devel] [PATCH 1/2] i386: define the AMD 'amd-ssbd' CPUID feature bit, (continued)
- Re: [Qemu-devel] [PATCH 1/2] i386: define the AMD 'amd-ssbd' CPUID feature bit, Daniel P . Berrangé, 2018/06/13
- Re: [Qemu-devel] [PATCH 1/2] i386: define the AMD 'amd-ssbd' CPUID feature bit, Konrad Rzeszutek Wilk, 2018/06/13
- Re: [Qemu-devel] [PATCH 1/2] i386: define the AMD 'amd-ssbd' CPUID feature bit, Daniel P . Berrangé, 2018/06/13
- Re: [Qemu-devel] [PATCH 1/2] i386: define the AMD 'amd-ssbd' CPUID feature bit, Konrad Rzeszutek Wilk, 2018/06/13
- Re: [Qemu-devel] [PATCH 1/2] i386: define the AMD 'amd-ssbd' CPUID feature bit, Daniel P . Berrangé, 2018/06/13
- Re: [Qemu-devel] [PATCH 1/2] i386: define the AMD 'amd-ssbd' CPUID feature bit, Eduardo Habkost, 2018/06/13
- Re: [Qemu-devel] [PATCH 1/2] i386: define the AMD 'amd-ssbd' CPUID feature bit, Tom Lendacky, 2018/06/05
- Re: [Qemu-devel] [PATCH 1/2] i386: define the AMD 'amd-ssbd' CPUID feature bit, Daniel P . Berrangé, 2018/06/05
- Re: [Qemu-devel] [PATCH 1/2] i386: define the AMD 'amd-ssbd' CPUID feature bit, Daniel P . Berrangé, 2018/06/06
- Re: [Qemu-devel] [PATCH 1/2] i386: define the AMD 'amd-ssbd' CPUID feature bit, Tom Lendacky, 2018/06/08
[Qemu-devel] [PATCH 2/2] i386: Define AMD's no SSB mitigation needed.,
Konrad Rzeszutek Wilk <=
Re: [Qemu-devel] [PATCH QEMU] Patches for new AMD CPU bits., Eduardo Habkost, 2018/06/13