linux-kernel - [PATCH 0/3] KVM: Mark vendor module param read-only after init

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Message-ID: <20221110013003.1421895-1-seanjc@google.com>
Date:   Thu, 10 Nov 2022 01:30:00 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] KVM: Mark vendor module param read-only after init

Mark the read-only VMX and SVM module params, and a few other global
variables, read-only after init.  In many cases, KVM is royally hosed if
a configuration knob changes while VMs are running, e.g. toggling the TDP
knob would result in spectacular fireworks.

This series is probably best queued very early in a cycle, as the result
of mis-labeled variable is an unexpected kernel #PF.

Sean Christopherson (3):
  KVM: VMX: Make module params and other variables read-only after init
  KVM: SVM: Make MSR permission bitmap offsets read-only after init
  KVM: SVM: Make module params and other variables read-only after init

 arch/x86/kvm/svm/svm.c          | 38 ++++++++++++++++-----------------
 arch/x86/kvm/svm/svm.h          |  2 +-
 arch/x86/kvm/vmx/capabilities.h | 16 +++++++-------
 arch/x86/kvm/vmx/nested.c       |  4 ++--
 arch/x86/kvm/vmx/sgx.c          |  2 +-
 arch/x86/kvm/vmx/sgx.h          |  2 +-
 arch/x86/kvm/vmx/vmx.c          | 36 +++++++++++++++----------------
 7 files changed, 50 insertions(+), 50 deletions(-)


base-commit: d663b8a285986072428a6a145e5994bc275df994
-- 
2.38.1.431.g37b22c650d-goog