diff options
| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2018-06-01 11:38:08 -0400 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2018-06-22 15:01:15 -0300 |
| commit | a764f3f7197f4d7ad8fe8424269933de912224cb (patch) | |
| tree | 1938fed38cbd4b47b2bb69c2b7f211c0641f5dc5 /target/i386/cpu.c | |
| parent | 9ccb9784b57804f5c74434ad6ccb66650a015ffc (diff) | |
i386: define the AMD 'amd-ssbd' CPUID feature bit
AMD future CPUs expose _two_ ways to utilize the Intel equivalant
of the Speculative Store Bypass Disable. The first is via
the virtualized VIRT_SPEC CTRL MSR (0xC001_011f) and the second
is via the SPEC_CTRL MSR (0x48). The document titled:
124441_AMD64_SpeculativeStoreBypassDisable_Whitepaper_final.pdf
gives priority of SPEC CTRL MSR over the VIRT SPEC CTRL MSR.
A copy of this document is available at
https://bugzilla.kernel.org/show_bug.cgi?id=199889
Anyhow, this means that on future AMD CPUs there will be _two_ ways to
deal with SSBD.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Message-Id: <20180601153809.15259-2-konrad.wilk@oracle.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'target/i386/cpu.c')
| -rw-r--r-- | target/i386/cpu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index d7dfefcde0..7234bebfcb 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, - NULL, "virt-ssbd", NULL, NULL, + "amd-ssbd", "virt-ssbd", NULL, NULL, NULL, NULL, NULL, NULL, }, .cpuid_eax = 0x80000008, |