linux-kernel - [PATCH 1/3] KVM: nSVM: Remove redundant cases in nested_svm

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Message-ID: <20251024192918.3191141-2-yosry.ahmed@linux.dev>
Date: Fri, 24 Oct 2025 19:29:16 +0000
From: Yosry Ahmed <yosry.ahmed@...ux.dev>
To: Sean Christopherson <seanjc@...gle.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>,
	Jim Mattson <jmattson@...gle.com>,
	kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Yosry Ahmed <yosry.ahmed@...ux.dev>
Subject: [PATCH 1/3] KVM: nSVM: Remove redundant cases in nested_svm_intercept()

Both the CRx and DRx cases are doing exactly what the default case is
doing, remove them.

No functional change intended.

Signed-off-by: Yosry Ahmed <yosry.ahmed@...ux.dev>
---
 arch/x86/kvm/svm/nested.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index a6443feab2520..71272efc16609 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -1436,16 +1436,6 @@ static int nested_svm_intercept(struct vcpu_svm *svm)
 	case SVM_EXIT_IOIO:
 		vmexit = nested_svm_intercept_ioio(svm);
 		break;
-	case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
-		if (vmcb12_is_intercept(&svm->nested.ctl, exit_code))
-			vmexit = NESTED_EXIT_DONE;
-		break;
-	}
-	case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
-		if (vmcb12_is_intercept(&svm->nested.ctl, exit_code))
-			vmexit = NESTED_EXIT_DONE;
-		break;
-	}
 	case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
 		/*
 		 * Host-intercepted exceptions have been checked already in
-- 
2.51.1.821.gb6fe4d2222-goog