From: Yosry Ahmed <yosry.ahmed@linux.dev>
To: Sean Christopherson <seanjc@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Yosry Ahmed <yosry.ahmed@linux.dev>
Subject: [PATCH 0/3] KVM: nSVM: Stop tracking EFER.SVME in guest mode
Date: Fri, 30 Jan 2026 02:07:32 +0000 [thread overview]
Message-ID: <20260130020735.2517101-1-yosry.ahmed@linux.dev> (raw)
Fix a bug (although not architecturally a bug) where KVM leaves guest
mode and tears nested state if L2 clears EFER.SVME and L1 does not
intercept it.
Yosry Ahmed (3):
KVM: SVM: Refactor EFER.SVME switching logic out of svm_set_efer()
KVM: nSVM: Do not track EFER.SVME toggling in guest mode
KVM: selftests: Add a test for L2 toggling EFER.SVME
arch/x86/kvm/svm/svm.c | 79 ++++++++++++-------
tools/testing/selftests/kvm/Makefile.kvm | 1 +
.../kvm/x86/svm_nested_toggle_efer_svme.c | 76 ++++++++++++++++++
3 files changed, 126 insertions(+), 30 deletions(-)
create mode 100644 tools/testing/selftests/kvm/x86/svm_nested_toggle_efer_svme.c
base-commit: 1a424e9e0616db91010f08e5985bcc6edc504205
--
2.53.0.rc1.225.gd81095ad13-goog
next reply other threads:[~2026-01-30 2:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-30 2:07 Yosry Ahmed [this message]
2026-01-30 2:07 ` [PATCH 1/3] KVM: SVM: Refactor EFER.SVME switching logic out of svm_set_efer() Yosry Ahmed
2026-02-04 18:49 ` Sean Christopherson
2026-01-30 2:07 ` [PATCH 2/3] KVM: nSVM: Do not track EFER.SVME toggling in guest mode Yosry Ahmed
2026-02-04 21:15 ` Sean Christopherson
2026-02-04 23:30 ` Yosry Ahmed
2026-02-05 2:10 ` Sean Christopherson
2026-01-30 2:07 ` [PATCH 3/3] KVM: selftests: Add a test for L2 toggling EFER.SVME Yosry Ahmed
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