cpu_map: Define md-clear CPUID bit

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>

diff --git a/src/cpu_map/x86_features.xml b/src/cpu_map/x86_features.xml
index efcc10b1aebdddbb85669e36cea0f03a7eb295be..370807f88e5fef444d0cde1c7a1610d479667cd9 100644 (file)
--- a/src/cpu_map/x86_features.xml
+++ b/src/cpu_map/x86_features.xml
@@ -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>

diff --git a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-enabled.xml b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-enabled.xml
index 0deca9fba64fa05b726b4d5e3bc5a9ce1526404d..74763a462b592674e77ec41840c8207b5a8261e0 100644 (file)
--- a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-enabled.xml
+++ b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-enabled.xml
@@ -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>

diff --git a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-guest.xml b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-guest.xml
index 70a0fc32861616e898c3ed363326b9456dfae759..867970d2c74003ce7bcf4b9525745af4d2aa7d44 100644 (file)
--- a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-guest.xml
+++ b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-guest.xml
@@ -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'/>

diff --git a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-host.xml b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-host.xml
index bbdfb6aa613d956e81c66d7ecb759a0bb17e342d..e7ced4279795606f80ec434c39ce99c6bf39c280 100644 (file)
--- a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-host.xml
+++ b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-host.xml
@@ -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'/>

diff --git a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-json.xml b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-json.xml
index 1f321db273a098543d7eddffa0ac72ba8bcd58d1..a5591278df4d47d25eb6c49d97dcdb2d6ba63486 100644 (file)
--- a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-json.xml
+++ b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-json.xml
@@ -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'/>

diff --git a/tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-guest.xml b/tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-guest.xml
index cc1fc90c4553f404c70529ffe82e2f284ae18a95..c7e8a1fccf5dbfdd3d8db5f17b0df4bf84758fd5 100644 (file)
--- a/tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-guest.xml
+++ b/tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-guest.xml
@@ -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'/>

diff --git a/tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-host.xml b/tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-host.xml
index dfabdc57c70545349aa32b3af8cdefbb0e46930b..d7482751b4013ba21689307d3b280f33b84ecc88 100644 (file)
--- a/tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-host.xml
+++ b/tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-host.xml
@@ -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'/>