linux-kernel - [PATCH 0/3] KVM: VMX: Let userspace set IA32_FEAT

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Message-Id: <20220607232353.3375324-1-seanjc@google.com>
Date:   Tue,  7 Jun 2022 23:23:50 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] KVM: VMX: Let userspace set IA32_FEAT_CTL at will

Fix a bug where KVM requires userspace to set the guest CPUID model
in order to enable features via IA32_FEAT_CTL.

Note, the selftest builds on the vmx_msrs_test from the VMX MSRs series[*],
i.e. it won't apply cleanly on kvm/queue.  

[*] https://lkml.kernel.org/r/20220607213604.3346000-1-seanjc@google.com

Sean Christopherson (3):
  KVM: VMX: Allow userspace to set all supported FEATURE_CONTROL bits
  KVM: VMX: Move MSR_IA32_FEAT_CTL.LOCKED check into "is valid" helper
  KVM: selftests: Verify userspace can stuff IA32_FEATURE_CONTROL at
    will

 arch/x86/kvm/vmx/vmx.c                        | 43 ++++++++++++++---
 .../selftests/kvm/include/x86_64/processor.h  |  2 +
 .../selftests/kvm/x86_64/vmx_msrs_test.c      | 47 +++++++++++++++++++
 3 files changed, 85 insertions(+), 7 deletions(-)


base-commit: 838fd3e5a7208ee3b95bf73898c135a44a0c589d
-- 
2.36.1.255.ge46751e96f-goog