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Message-ID: <20230815203653.519297-1-seanjc@google.com>
Date: Tue, 15 Aug 2023 13:36:38 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
Zeng Guang <guang.zeng@...el.com>,
Yuan Yao <yuan.yao@...el.com>
Subject: [PATCH v3 00/15] KVM: x86: Add "governed" X86_FEATURE framework
Third and hopefully final version of the framework to manage and cache
KVM-governed features, i.e. CPUID based features that require explicit
KVM enabling and/or need to be queried semi-frequently by KVM.
This version is just the governed features patches, as I kept the TSC
scaling patches in kvm-x86/misc but blasted away the goverend features
with a forced push.
My plan is again to apply this quite quickly so that it can be used as
a base for other series.
v3:
- "Drop" TSC scaling patches (already applied).
- Remove dead xsave_enabled code (snuck into v2 by a bad conflict
resolution). [Zeng]
- Make kvm_is_governed_feature() return a bool. [Zeng]
- Collect a review. [Yuan]
v2:
- https://lore.kernel.org/all/20230729011608.1065019-1-seanjc@google.com
- Add patches to clean up TSC scaling.
- Add a comment explaining the virtual VMLOAD/VMLAVE vs. SYSENTER on
Intel madness.
- Use a governed feature for X86_FEATURE_VMX.
- Incorporate KVM capabilities into the main check-and-set helper. [Chao]
v1: https://lore.kernel.org/all/20230217231022.816138-1-seanjc@google.com
Sean Christopherson (15):
KVM: x86: Add a framework for enabling KVM-governed x86 features
KVM: x86/mmu: Use KVM-governed feature framework to track "GBPAGES
enabled"
KVM: VMX: Recompute "XSAVES enabled" only after CPUID update
KVM: VMX: Check KVM CPU caps, not just VMX MSR support, for XSAVE
enabling
KVM: VMX: Rename XSAVES control to follow KVM's preferred "ENABLE_XYZ"
KVM: x86: Use KVM-governed feature framework to track "XSAVES enabled"
KVM: nVMX: Use KVM-governed feature framework to track "nested VMX
enabled"
KVM: nSVM: Use KVM-governed feature framework to track "NRIPS enabled"
KVM: nSVM: Use KVM-governed feature framework to track "TSC scaling
enabled"
KVM: nSVM: Use KVM-governed feature framework to track "vVM{SAVE,LOAD}
enabled"
KVM: nSVM: Use KVM-governed feature framework to track "LBRv enabled"
KVM: nSVM: Use KVM-governed feature framework to track "Pause Filter
enabled"
KVM: nSVM: Use KVM-governed feature framework to track "vGIF enabled"
KVM: nSVM: Use KVM-governed feature framework to track "vNMI enabled"
KVM: x86: Disallow guest CPUID lookups when IRQs are disabled
arch/x86/include/asm/kvm_host.h | 20 ++++++++-
arch/x86/include/asm/vmx.h | 2 +-
arch/x86/kvm/cpuid.c | 34 ++++++++++++++++
arch/x86/kvm/cpuid.h | 46 +++++++++++++++++++++
arch/x86/kvm/governed_features.h | 21 ++++++++++
arch/x86/kvm/mmu/mmu.c | 20 ++-------
arch/x86/kvm/svm/nested.c | 46 ++++++++++++---------
arch/x86/kvm/svm/svm.c | 59 +++++++++++++++------------
arch/x86/kvm/svm/svm.h | 16 ++------
arch/x86/kvm/vmx/capabilities.h | 2 +-
arch/x86/kvm/vmx/hyperv.c | 2 +-
arch/x86/kvm/vmx/nested.c | 13 +++---
arch/x86/kvm/vmx/nested.h | 2 +-
arch/x86/kvm/vmx/vmx.c | 69 ++++++++++++++------------------
arch/x86/kvm/vmx/vmx.h | 3 +-
arch/x86/kvm/x86.c | 4 +-
16 files changed, 232 insertions(+), 127 deletions(-)
create mode 100644 arch/x86/kvm/governed_features.h
base-commit: aaf44a3a699309c77537d0abf49411f9dc7dc523
--
2.41.0.694.ge786442a9b-goog
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