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| author | Sean Christopherson <seanjc@google.com> | 2022-03-04 05:20:17 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-04-29 18:49:49 +0200 |
| commit | 6819af7597d87d40769b47bb377472877a6b56c0 (patch) | |
| tree | b374084b3096f02be7755060ce7cdd5debd3eefd /arch/x86/include | |
| parent | KVM: x86/mmu: rephrase unclear comment (diff) | |
| download | linux-6819af7597d87d40769b47bb377472877a6b56c0.tar.xz linux-6819af7597d87d40769b47bb377472877a6b56c0.zip | |
KVM: x86: Clean up and document nested #PF workaround
Replace the per-vendor hack-a-fix for KVM's #PF => #PF => #DF workaround
with an explicit, common workaround in kvm_inject_emulated_page_fault().
Aside from being a hack, the current approach is brittle and incomplete,
e.g. nSVM's KVM_SET_NESTED_STATE fails to set ->inject_page_fault(),
and nVMX fails to apply the workaround when VMX is intercepting #PF due
to allow_smaller_maxphyaddr=1.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index e1c695f72b8b..e46bd289e5df 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1516,6 +1516,8 @@ struct kvm_x86_ops { struct kvm_x86_nested_ops { void (*leave_nested)(struct kvm_vcpu *vcpu); int (*check_events)(struct kvm_vcpu *vcpu); + bool (*handle_page_fault_workaround)(struct kvm_vcpu *vcpu, + struct x86_exception *fault); bool (*hv_timer_pending)(struct kvm_vcpu *vcpu); void (*triple_fault)(struct kvm_vcpu *vcpu); int (*get_state)(struct kvm_vcpu *vcpu, |