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| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-11-26 07:00:15 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-12-08 04:25:03 -0500 |
| commit | 41e68b6964ebf20082af55ad1394523cf86c4c6a (patch) | |
| tree | 88cf9d35a980b7fbe405ffb990214171ea4dd276 /arch/x86/kvm/kvm_cache_regs.h | |
| parent | c62c7bd4f95b8f2a28098c4139a369670998aef2 (diff) | |
KVM: vmx, svm: clean up mass updates to regs_avail/regs_dirty bits
Document the meaning of the three combinations of regs_avail and
regs_dirty. Update regs_dirty just after writeback instead of
doing it later after vmexit. After vmexit, instead, we clear the
regs_avail bits corresponding to lazily-loaded registers.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/kvm_cache_regs.h')
| -rw-r--r-- | arch/x86/kvm/kvm_cache_regs.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kvm/kvm_cache_regs.h b/arch/x86/kvm/kvm_cache_regs.h index 6e6d0d01f18d..ac3d3bd662f4 100644 --- a/arch/x86/kvm/kvm_cache_regs.h +++ b/arch/x86/kvm/kvm_cache_regs.h @@ -43,6 +43,13 @@ BUILD_KVM_GPR_ACCESSORS(r14, R14) BUILD_KVM_GPR_ACCESSORS(r15, R15) #endif +/* + * avail dirty + * 0 0 register in VMCS/VMCB + * 0 1 *INVALID* + * 1 0 register in vcpu->arch + * 1 1 register in vcpu->arch, needs to be stored back + */ static inline bool kvm_register_is_available(struct kvm_vcpu *vcpu, enum kvm_reg reg) { |