From: Sean Christopherson <seanjc@google.com>
To: Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Doug Covelli <doug.covelli@broadcom.com>
Subject: [PATCH 0/2] KVM: SVM: Fix an STI shadow on VMRUN bug
Date: Fri, 14 Feb 2025 17:09:44 -0800 [thread overview]
Message-ID: <20250215010946.1201353-1-seanjc@google.com> (raw)
Fix an amusing bug where KVM puts VMRUN in an STI shadow, which AMD CPUs
bleed into guest state if a #VMEXIT occurs before completing the VMRUN,
e.g. if vectoring an injected exception triggers an exit.
Sean Christopherson (2):
KVM: SVM: Set RFLAGS.IF=1 in C code, to get VMRUN out of the STI
shadow
KVM: selftests: Assert that STI blocking isn't set after event
injection
arch/x86/kvm/svm/svm.c | 14 ++++++++++++++
arch/x86/kvm/svm/vmenter.S | 10 +---------
.../selftests/kvm/x86/nested_exceptions_test.c | 2 ++
3 files changed, 17 insertions(+), 9 deletions(-)
base-commit: f0f0cbf3b767935abcfdb36649ab626fb2ab5ae7
--
2.48.1.601.g30ceb7b040-goog
next reply other threads:[~2025-02-15 1:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-15 1:09 Sean Christopherson [this message]
2025-02-15 1:09 ` [PATCH 1/2] KVM: SVM: Set RFLAGS.IF=1 in C code, to get VMRUN out of the STI shadow Sean Christopherson
2025-02-20 1:07 ` Sean Christopherson
2025-02-15 1:09 ` [PATCH 2/2] KVM: selftests: Assert that STI blocking isn't set after event injection Sean Christopherson
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