linux-kernel - [PATCH 5.10 501/545] KVM: SVM: Drop VMXE check from svm_set

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Message-Id: <20220819153851.904128084@linuxfoundation.org>
Date:   Fri, 19 Aug 2022 17:44:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 501/545] KVM: SVM: Drop VMXE check from svm_set_cr4()

From: Sean Christopherson <sean.j.christopherson@...el.com>

[ 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@...el.com>
Message-Id: <20201007014417.29276-4-sean.j.christopherson@...el.com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 184e68e7eedf..9bc166a5d453 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);
 
-- 
2.35.1