kvm: x86: Add user space part for in-kernel APIC

This introduces the alternative APIC device which makes use of KVM's
in-kernel device model. External NMI injection via LINT1 is emulated by
checking the current state of the in-kernel APIC, only injecting a NMI
into the VCPU if LINT1 is unmasked and configured to DM_NMI.

MSI is not yet supported, so we disable this when the in-kernel model is
in use.

CC: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/kvm.h b/kvm.h
index ad430fd09a..40b5ffcfa3 100644
--- a/kvm.h
+++ b/kvm.h
@@ -31,6 +31,7 @@ extern int kvm_allowed;
 #endif
 
 struct kvm_run;
+struct kvm_lapic_state;
 
 typedef struct KVMCapabilityInfo {
     const char *name;
@@ -134,6 +135,9 @@ int kvm_irqchip_set_irq(KVMState *s, int irq, int level);
 void kvm_irqchip_add_route(KVMState *s, int gsi, int irqchip, int pin);
 int kvm_irqchip_commit_routes(KVMState *s);
 
+void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
+void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
+
 struct kvm_guest_debug;
 struct kvm_debug_exit_arch;