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| author |   Binbin Wu <binbin.wu@linux.intel.com> | 2025-02-22 09:42:18 +0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2025-03-14 14:20:54 -0400 |
| commit | 44428e4936022a7a31743017849b167e64f33a32 (patch) | |
| tree | ce208f8baea8e5ce8072f559f508e333dec5041d /include/linux/kvm_host.h | |
| parent | KVM: x86: Have ____kvm_emulate_hypercall() read the GPRs (diff) | |
| download | wireguard-linux-44428e4936022a7a31743017849b167e64f33a32.tar.xz wireguard-linux-44428e4936022a7a31743017849b167e64f33a32.zip | |
KVM: x86: Move pv_unhalted check out of kvm_vcpu_has_events()
Move pv_unhalted check out of kvm_vcpu_has_events(), check pv_unhalted
explicitly when handling PV unhalt and expose kvm_vcpu_has_events().
kvm_vcpu_has_events() returns true if pv_unhalted is set, and pv_unhalted
is only cleared on transitions to KVM_MP_STATE_RUNNABLE. If the guest
initiates a spurious wakeup, pv_unhalted could be left set in perpetuity.
Currently, this is not problematic because kvm_vcpu_has_events() is only
called when handling PV unhalt. However, if kvm_vcpu_has_events() is used
for other purposes in the future, it could return the unexpected results.
Export kvm_vcpu_has_events() for its usage in broader contexts.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
Message-ID: <20250222014225.897298-3-binbin.wu@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/kvm_host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 3bfe3140f444..ed1968f6f841 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1609,6 +1609,7 @@ void kvm_arch_disable_virtualization(void); int kvm_arch_enable_virtualization_cpu(void); void kvm_arch_disable_virtualization_cpu(void); #endif +bool kvm_vcpu_has_events(struct kvm_vcpu *vcpu); int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu); int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu); |