[PATCH 00/14] KVM: nVMX: Use vmcs_config for setting up nested VMX MSRs

From: Vitaly Kuznetsov
Date: Mon Jun 27 2022 - 12:04:53 EST


Changes since RFC:
- "KVM: VMX: Extend VMX controls macro shenanigans" PATCH added and the
infrastructure is later used in other patches [Sean] PATCHes 1-3 added
to support the change.
- "KVM: VMX: Clear controls obsoleted by EPT at runtime, not setup" PATCH
added [Sean].
- Commit messages added.

vmcs_config is a sanitized version of host VMX MSRs where some controls are
filtered out (e.g. when Enlightened VMCS is enabled, some know bugs are
discovered, some inconsistencies in controls are detected,...) but
nested_vmx_setup_ctls_msrs() uses raw host MSRs instead. This may end up
in exposing undesired controls to L1. Switch to using vmcs_config instead.

Sean Christopherson (1):
KVM: VMX: Clear controls obsoleted by EPT at runtime, not setup

Vitaly Kuznetsov (13):
KVM: VMX: Check VM_ENTRY_IA32E_MODE in setup_vmcs_config()
KVM: VMX: Check CPU_BASED_{INTR,NMI}_WINDOW_EXITING in
setup_vmcs_config()
KVM: VMX: Tweak the special handling of SECONDARY_EXEC_ENCLS_EXITING
in setup_vmcs_config()
KVM: VMX: Extend VMX controls macro shenanigans
KVM: VMX: Move CPU_BASED_CR8_{LOAD,STORE}_EXITING filtering out of
setup_vmcs_config()
KVM: VMX: Add missing VMEXIT controls to vmcs_config
KVM: VMX: Add missing VMENTRY controls to vmcs_config
KVM: VMX: Add missing CPU based VM execution controls to vmcs_config
KVM: nVMX: Use sanitized allowed-1 bits for VMX control MSRs
KVM: VMX: Store required-1 VMX controls in vmcs_config
KVM: nVMX: Use sanitized required-1 bits for VMX control MSRs
KVM: VMX: Cache MSR_IA32_VMX_MISC in vmcs_config
KVM: nVMX: Use cached host MSR_IA32_VMX_MISC value for setting up
nested MSR

arch/x86/kvm/vmx/capabilities.h | 16 +--
arch/x86/kvm/vmx/nested.c | 37 +++---
arch/x86/kvm/vmx/nested.h | 2 +-
arch/x86/kvm/vmx/vmx.c | 198 ++++++++++++++------------------
arch/x86/kvm/vmx/vmx.h | 118 +++++++++++++++++++
5 files changed, 229 insertions(+), 142 deletions(-)

--
2.35.3