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KVM: VMX: Use kvm_read_cr4() to get cr4 value
author
Xiaoyao Li
<xiaoyao.li@intel.com>
Mon, 10 Apr 2023 12:50:16 +0000
(08:50 -0400)
committer
Sean Christopherson
<seanjc@google.com>
Fri, 26 May 2023 20:41:43 +0000
(13:41 -0700)
Directly use vcpu->arch.cr4 is not recommended since it gets stale value
if the cr4 is not available.
Use kvm_read_cr4() instead to ensure correct value.
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Link:
https://lore.kernel.org/r/20230410125017.1305238-2-xiaoyao.li@intel.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
arch/x86/kvm/vmx/vmx.c
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diff --git
a/arch/x86/kvm/vmx/vmx.c
b/arch/x86/kvm/vmx/vmx.c
index
44fb619
..
4335d4b
100644
(file)
--- a/
arch/x86/kvm/vmx/vmx.c
+++ b/
arch/x86/kvm/vmx/vmx.c
@@
-3387,7
+3387,7
@@
static bool vmx_is_valid_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
{
- unsigned long old_cr4 =
vcpu->arch.cr4
;
+ unsigned long old_cr4 =
kvm_read_cr4(vcpu)
;
struct vcpu_vmx *vmx = to_vmx(vcpu);
/*
* Pass through host's Machine Check Enable value to hw_cr4, which