From: Sean Christopherson sean.j.christopherson@intel.com
stable inclusion from stable-v5.10.137 commit 2f04a04d06509fbba0a4069dba5d71010139d921 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 311a06593b9a3944a63ed176b95cb8d857f7c83b ]
Drop svm_set_cr4()'s explicit check CR4.VMXE now that common x86 handles the check by incorporating VMXE into the CR4 reserved bits, via kvm_cpu_caps. SVM obviously does not set X86_FEATURE_VMX.
No functional change intended.
Signed-off-by: Sean Christopherson sean.j.christopherson@intel.com Message-Id: 20201007014417.29276-4-sean.j.christopherson@intel.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Wei Li liwei391@huawei.com --- arch/x86/kvm/svm/svm.c | 3 --- 1 file changed, 3 deletions(-)
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index a44d793b9b51..8aea17ce5b04 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -1697,9 +1697,6 @@ int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE; unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;
- if (cr4 & X86_CR4_VMXE) - return 1; - if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE)) svm_flush_tlb(vcpu);