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From 96b390925bffede1dcf2940cc79120b54dc3ed6c Mon Sep 17 00:00:00 2001
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Message-Id: <96b390925bffede1dcf2940cc79120b54dc3ed6c@dist-git>
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From: Jiri Denemark <jdenemar@redhat.com>
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Date: Fri, 5 Apr 2019 15:11:20 +0200
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Subject: [PATCH] cpu_map: Define md-clear CPUID bit
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CVE-2018-12126, CVE-2018-12127, CVE-2018-12130
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The bit is set when microcode provides the mechanism to invoke a flush
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of various exploitable CPU buffers by invoking the VERW instruction.
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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(cherry picked from a private commit)
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Conflicts:
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src/cpu_map/x86_features.xml
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- no CPU map split downstream
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tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-guest.xml
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tests/cputestdata/x86_64-cpuid-Xeon-Platinum-8268-host.xml
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- test data missing downstream
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tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-guest.xml
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tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-host.xml
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- intel-pt feature is missing in RHEL-7.6
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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---
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src/cpu/cpu_map.xml | 3 +++
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tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-enabled.xml | 2 +-
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tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-guest.xml | 1 +
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tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-host.xml | 1 +
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tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-json.xml | 1 +
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5 files changed, 7 insertions(+), 1 deletion(-)
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diff --git a/src/cpu/cpu_map.xml b/src/cpu/cpu_map.xml
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index 1382c29cd1..e8960470ad 100644
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--- a/src/cpu/cpu_map.xml
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+++ b/src/cpu/cpu_map.xml
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@@ -295,6 +295,9 @@
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<feature name='avx512-4fmaps'>
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<cpuid eax_in='0x07' ecx_in='0x00' edx='0x00000008'/>
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</feature>
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+ <feature name='md-clear'>
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+ <cpuid eax_in='0x07' ecx_in='0x00' edx='0x00000400'/>
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+ </feature>
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<feature name='spec-ctrl'>
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<cpuid eax_in='0x07' ecx_in='0x00' edx='0x04000000'/>
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</feature>
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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
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index 0deca9fba6..74763a462b 100644
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--- a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-enabled.xml
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+++ b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-enabled.xml
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@@ -2,7 +2,7 @@
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<cpudata arch='x86'>
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<cpuid eax_in='0x00000001' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0xf7fa3203' edx='0x0f8bfbff'/>
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<cpuid eax_in='0x00000006' ecx_in='0x00' eax='0x00000004' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
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- <cpuid eax_in='0x00000007' ecx_in='0x00' eax='0x00000000' ebx='0x009c4fbb' ecx='0x00000000' edx='0x8c000000'/>
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+ <cpuid eax_in='0x00000007' ecx_in='0x00' eax='0x00000000' ebx='0x009c4fbb' ecx='0x00000000' edx='0x8c000400'/>
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<cpuid eax_in='0x0000000d' ecx_in='0x01' eax='0x00000007' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
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<cpuid eax_in='0x80000001' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000121' edx='0x2c100800'/>
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</cpudata>
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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
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index 141c01c841..3b3472742e 100644
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--- a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-guest.xml
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+++ b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-guest.xml
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@@ -19,6 +19,7 @@
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<feature policy='require' name='osxsave'/>
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<feature policy='require' name='tsc_adjust'/>
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<feature policy='require' name='clflushopt'/>
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+ <feature policy='require' name='md-clear'/>
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<feature policy='require' name='stibp'/>
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<feature policy='require' name='ssbd'/>
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<feature policy='require' name='xsaves'/>
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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
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index 53bfc9728d..df4f97417c 100644
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--- a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-host.xml
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+++ b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-host.xml
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@@ -20,6 +20,7 @@
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<feature name='osxsave'/>
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<feature name='tsc_adjust'/>
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<feature name='clflushopt'/>
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+ <feature name='md-clear'/>
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<feature name='stibp'/>
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<feature name='ssbd'/>
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<feature name='xsaves'/>
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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
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index 1f321db273..a5591278df 100644
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--- a/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-json.xml
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+++ b/tests/cputestdata/x86_64-cpuid-Xeon-E3-1225-v5-json.xml
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@@ -5,6 +5,7 @@
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<feature policy='require' name='hypervisor'/>
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<feature policy='require' name='tsc_adjust'/>
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<feature policy='require' name='clflushopt'/>
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+ <feature policy='require' name='md-clear'/>
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<feature policy='require' name='stibp'/>
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<feature policy='require' name='ssbd'/>
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<feature policy='require' name='pdpe1gb'/>
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--
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2.21.0
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