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,
Like Xu <like.xu.linux@gmail.com>
Subject: [RFC PATCH 0/3] KVM: x86: Disallow writes to feature MSRs post-KVM_RUN
Date: Fri, 5 Aug 2022 17:29:42 +0000 [thread overview]
Message-ID: <20220805172945.35412-1-seanjc@google.com> (raw)
Give feature MSRs that same treatment as CPUID and disallow changing said
MSRs after KVM_RUN.
RFC as this is lightly tested and should come with a selftests update to
verify it actually works. Posting early to get feedback on the overall
idea, and on the VMX MSRs trickery (though I think patches 1-2 are a good
idea irrespective of trying to reduce the overhead of the new check).
Sean Christopherson (3):
KVM: x86: Add macros to track first...last VMX feature MSRs
KVM: x86: Generate set of VMX feature MSRs using first/last
definitions
KVM: x86: Disallow writes to immutable feature MSRs after KVM_RUN
arch/x86/kvm/svm/svm.c | 2 +-
arch/x86/kvm/vmx/vmx.c | 8 ++--
arch/x86/kvm/x86.c | 90 +++++++++++++++++++++++++++---------------
arch/x86/kvm/x86.h | 8 ++++
4 files changed, 72 insertions(+), 36 deletions(-)
base-commit: 93472b79715378a2386598d6632c654a2223267b
--
2.37.1.559.g78731f0fdb-goog
next reply other threads:[~2022-08-05 17:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-05 17:29 Sean Christopherson [this message]
2022-08-05 17:29 ` [RFC PATCH 1/3] KVM: x86: Add macros to track first...last VMX feature MSRs Sean Christopherson
2022-08-05 17:29 ` [RFC PATCH 2/3] KVM: x86: Generate set of VMX feature MSRs using first/last definitions Sean Christopherson
2022-08-10 12:52 ` Paolo Bonzini
2022-08-10 14:40 ` Sean Christopherson
2022-08-10 19:16 ` Paolo Bonzini
2022-08-05 17:29 ` [RFC PATCH 3/3] KVM: x86: Disallow writes to immutable feature MSRs after KVM_RUN Sean Christopherson
2022-08-10 6:29 ` Xiaoyao Li
2022-08-10 14:45 ` Sean Christopherson
2022-08-10 12:52 ` [RFC PATCH 0/3] KVM: x86: Disallow writes to feature MSRs post-KVM_RUN Paolo Bonzini
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