kvm: Introduce core services for in-kernel irqchip support

Add the basic infrastructure to active in-kernel irqchip support, inject
interrupts into these models, and maintain IRQ routes.

Routing is optional and depends on the host arch supporting
KVM_CAP_IRQ_ROUTING. When it's not available on x86, we looe the HPET as
we can't route GSI0 to IOAPIC pin 2.

In-kernel irqchip support will once be controlled by the machine
property 'kernel_irqchip', but this is not yet wired up.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/kvm.h b/kvm.h
index c1de81a11..dd2d4f0a9 100644
--- a/kvm.h
+++ b/kvm.h
@@ -51,6 +51,7 @@ int kvm_has_debugregs(void);
 int kvm_has_xsave(void);
 int kvm_has_xcrs(void);
 int kvm_has_many_ioeventfds(void);
+int kvm_has_gsi_routing(void);
 
 #ifdef NEED_CPU_H
 int kvm_init_vcpu(CPUState *env);
@@ -124,6 +125,13 @@ void kvm_arch_reset_vcpu(CPUState *env);
 int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr);
 int kvm_arch_on_sigbus(int code, void *addr);
 
+void kvm_arch_init_irq_routing(KVMState *s);
+
+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);
+
 struct kvm_guest_debug;
 struct kvm_debug_exit_arch;