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cpu_map: Define md-clear CPUID bit

Browse Source 
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091

The bit is set when microcode provides the mechanism to invoke a flush
of various exploitable CPU buffers by invoking the VERW instruction.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Jiri Denemark 2019-04-05 15:11:20 +02:00
parent 5cd9db3ac1
commit 538d873571
7 changed files with 9 additions and 1 deletions
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3
src/cpu_map/x86_features.xml
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@ -320,6 +320,9 @@
<feature name='avx512-4fmaps'>
<cpuid eax_in='0x07' ecx_in='0x00' edx='0x00000008'/>
</feature>
<feature name='md-clear'> <!-- md_clear -->
<cpuid eax_in='0x07' ecx_in='0x00' edx='0x00000400'/>
</feature>
<feature name='pconfig'>
<cpuid eax_in='0x07' ecx_in='0x00' edx='0x00040000'/>
</feature>

2
tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-enabled.xml
View File

@ -2,7 +2,7 @@
<cpudata arch='x86'>
<cpuid eax_in='0x00000001' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0xf7fa3203' edx='0x0f8bfbff'/>
<cpuid eax_in='0x00000006' ecx_in='0x00' eax='0x00000004' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x00000007' ecx_in='0x00' eax='0x00000000' ebx='0x009c4fbb' ecx='0x00000000' edx='0x8c000000'/>
<cpuid eax_in='0x00000007' ecx_in='0x00' eax='0x00000000' ebx='0x009c4fbb' ecx='0x00000000' edx='0x8c000400'/>
<cpuid eax_in='0x0000000d' ecx_in='0x01' eax='0x00000007' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x80000001' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000121' edx='0x2c100800'/>
</cpudata>

1
tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-guest.xml
View File

@ -20,6 +20,7 @@
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='clflushopt'/>
<feature policy='require' name='intel-pt'/>
<feature policy='require' name='md-clear'/>
<feature policy='require' name='stibp'/>
<feature policy='require' name='ssbd'/>
<feature policy='require' name='xsaves'/>

1
tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-host.xml
View File

@ -21,6 +21,7 @@
<feature name='tsc_adjust'/>
<feature name='clflushopt'/>
<feature name='intel-pt'/>
<feature name='md-clear'/>
<feature name='stibp'/>
<feature name='ssbd'/>
<feature name='xsaves'/>

1
tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-json.xml
View File

@ -5,6 +5,7 @@
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='clflushopt'/>
<feature policy='require' name='md-clear'/>
<feature policy='require' name='stibp'/>
<feature policy='require' name='ssbd'/>
<feature policy='require' name='pdpe1gb'/>

1
tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-guest.xml
View File

@ -23,6 +23,7 @@
<feature policy='require' name='intel-pt'/>
<feature policy='require' name='pku'/>
<feature policy='require' name='ospke'/>
<feature policy='require' name='md-clear'/>
<feature policy='require' name='stibp'/>
<feature policy='require' name='arch-capabilities'/>
<feature policy='require' name='xsaves'/>

1
tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-host.xml
View File

@ -24,6 +24,7 @@
<feature name='intel-pt'/>
<feature name='pku'/>
<feature name='ospke'/>
<feature name='md-clear'/>
<feature name='stibp'/>
<feature name='arch-capabilities'/>
<feature name='xsaves'/>