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[PATCH] hvf: Gate RDTSCP on CPU_BASED2_RDTSCP, not just CPU_BASED_TSC_OF
From: |
Jessica Clarke |
Subject: |
[PATCH] hvf: Gate RDTSCP on CPU_BASED2_RDTSCP, not just CPU_BASED_TSC_OFFSET |
Date: |
Mon, 16 Nov 2020 20:03:19 +0000 |
Buglink: https://bugs.launchpad.net/qemu/+bug/1894836
Signed-off-by: Jessica Clarke <jrtc27@jrtc27.com>
---
target/i386/hvf/x86_cpuid.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/target/i386/hvf/x86_cpuid.c b/target/i386/hvf/x86_cpuid.c
index 16762b6eb4..fc1f87ec57 100644
--- a/target/i386/hvf/x86_cpuid.c
+++ b/target/i386/hvf/x86_cpuid.c
@@ -122,6 +122,10 @@ uint32_t hvf_get_supported_cpuid(uint32_t func, uint32_t
idx,
CPUID_PAT | CPUID_PSE36 | CPUID_EXT2_MMXEXT | CPUID_MMX |
CPUID_FXSR | CPUID_EXT2_FXSR | CPUID_EXT2_PDPE1GB |
CPUID_EXT2_3DNOWEXT |
CPUID_EXT2_3DNOW | CPUID_EXT2_LM | CPUID_EXT2_RDTSCP |
CPUID_EXT2_NX;
+ hv_vmx_read_capability(HV_VMX_CAP_PROCBASED2, &cap);
+ if (!(cap & CPU_BASED2_RDTSCP)) {
+ edx &= ~CPUID_EXT2_RDTSCP;
+ }
hv_vmx_read_capability(HV_VMX_CAP_PROCBASED, &cap);
if (!(cap & CPU_BASED_TSC_OFFSET)) {
edx &= ~CPUID_EXT2_RDTSCP;
--
2.28.0
- [PATCH] hvf: Gate RDTSCP on CPU_BASED2_RDTSCP, not just CPU_BASED_TSC_OFFSET,
Jessica Clarke <=