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[Qemu-devel] [PULL 08/12] i386: Define AMD's no SSB mitigation needed.
From: |
Eduardo Habkost |
Subject: |
[Qemu-devel] [PULL 08/12] i386: Define AMD's no SSB mitigation needed. |
Date: |
Mon, 25 Jun 2018 19:25:20 -0300 |
From: Konrad Rzeszutek Wilk <address@hidden>
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>
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 7234bebfcb..7a4484bb06 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1009,7 +1009,7 @@ 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,
--
2.18.0.rc1.1.g3f1ff2140
- [Qemu-devel] [PULL 00/12] x86 queue, 2018-06-25, Eduardo Habkost, 2018/06/25
- [Qemu-devel] [PULL 01/12] i386: Add support for CPUID_8000_001E for AMD, Eduardo Habkost, 2018/06/25
- [Qemu-devel] [PULL 02/12] i386: improve alignment of CPU model listing, Eduardo Habkost, 2018/06/25
- [Qemu-devel] [PULL 03/12] i386: improve sorting of CPU model names, Eduardo Habkost, 2018/06/25
- [Qemu-devel] [PULL 04/12] i386: display known CPUID features linewrapped, in alphabetical order, Eduardo Habkost, 2018/06/25
- [Qemu-devel] [PULL 05/12] i386: Remove osxsave CPUID flag name, Eduardo Habkost, 2018/06/25
- [Qemu-devel] [PULL 06/12] i386: Remove ospke CPUID flag name, Eduardo Habkost, 2018/06/25
- [Qemu-devel] [PULL 07/12] i386: define the AMD 'amd-ssbd' CPUID feature bit, Eduardo Habkost, 2018/06/25
- [Qemu-devel] [PULL 08/12] i386: Define AMD's no SSB mitigation needed.,
Eduardo Habkost <=
- [Qemu-devel] [PULL 09/12] i386: Allow TOPOEXT to be enabled on older kernels, Eduardo Habkost, 2018/06/25
- [Qemu-devel] [PULL 10/12] i386: Fix up the Node id for CPUID_8000_001E, Eduardo Habkost, 2018/06/25
- [Qemu-devel] [PULL 11/12] i386: Enable TOPOEXT feature on AMD EPYC CPU, Eduardo Habkost, 2018/06/25
- [Qemu-devel] [PULL 12/12] i386: Remove generic SMT thread check, Eduardo Habkost, 2018/06/25
- Re: [Qemu-devel] [PULL 00/12] x86 queue, 2018-06-25, Peter Maydell, 2018/06/26