[PATCH 0/4] KVM: VMX: nVMX: Make eVMCS enablement more robust

From: Vitaly Kuznetsov
Date: Tue Oct 18 2022 - 06:10:19 EST


This is a continuation of "KVM: VMX: Support updated eVMCSv1 revision + use
vmcs_config for L1 VMX MSRs" work:
https://lore.kernel.org/kvm/20220830133737.1539624-1-vkuznets@xxxxxxxxxx/

and a preparation to enabling new eVMCS features for Hyper-V on KVM, namely
nested TSC scaling.

Future proof KVM against two scenarios:
- nVMX: A new feature which doesn't have a corresponding eVMCSv1 field gets
implemented in KVM but EVMCS1_UNSUPPORTED_* defines are left unchanged.
- VMX: A new feature supported by KVM but currently missing in eVMCSv1 gets
implemented in a future Hyper-V version breaking KVM.

Note: 'vmx/evmcs.{c,h}' are renamed to 'vmx/hyperv.{c,h}' in
https://lore.kernel.org/kvm/20221004123956.188909-7-vkuznets@xxxxxxxxxx/

Vitaly Kuznetsov (4):
KVM: nVMX: Sanitize primary processor-based VM-execution controls with
eVMCS too
KVM: nVMX: Invert 'unsupported by eVMCSv1' check
KVM: nVMX: Prepare to sanitize tertiary execution controls with eVMCS
KVM: VMX: Resurrect vmcs_conf sanitization for KVM-on-Hyper-V

arch/x86/kvm/vmx/evmcs.c | 118 ++++++++++++++++++++++++++++++++-------
arch/x86/kvm/vmx/evmcs.h | 93 +++++++++++++++++++++++++-----
arch/x86/kvm/vmx/vmx.c | 5 ++
3 files changed, 180 insertions(+), 36 deletions(-)

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2.37.3