linux-kernel - [PATCH 0/3] KVM: nSVM: Fixes for SVM_EXIT_CR0_SEL

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Message-ID: <20251024192918.3191141-1-yosry.ahmed@linux.dev>
Date: Fri, 24 Oct 2025 19:29:15 +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 0/3] KVM: nSVM: Fixes for SVM_EXIT_CR0_SEL_WRITE injection

A couple of fixes for injecting SVM_EXIT_CR0_SEL_WRITE to L1 when
emulating MOV-to-CR0 or LMSW. LMSW is handled by the emulator even in
some cases where decode assists are enabled, so it's a more important
fix. An example would be if L0 intercepts SVM_EXIT_WRITE_CR0 while L1
intercepts SVM_EXIT_CR0_SEL_WRITE.

Patch is an unrelated cleanup that can be dropped/merged separately.

Yosry Ahmed (3):
  KVM: nSVM: Remove redundant cases in nested_svm_intercept()
  KVM: nSVM: Propagate SVM_EXIT_CR0_SEL_WRITE correctly for LMSW
    emulation
  KVM: nSVM: Avoid incorrect injection of SVM_EXIT_CR0_SEL_WRITE

 arch/x86/kvm/svm/nested.c | 10 ----------
 arch/x86/kvm/svm/svm.c    | 34 ++++++++++++++++++++++------------
 2 files changed, 22 insertions(+), 22 deletions(-)

-- 
2.51.1.821.gb6fe4d2222-goog