KVM: PPC: Book3S HV: Introduce kvmppc_passthru_irqmap

This patch introduces an IRQ mapping structure, the
kvmppc_passthru_irqmap structure that is to be used
to map the real hardware IRQ in the host with the virtual
hardware IRQ (gsi) that is injected into a guest by KVM for
passthrough adapters.

Currently, we assume a separate IRQ mapping structure for
each guest. Each kvmppc_passthru_irqmap has a mapping arrays,
containing all defined real<->virtual IRQs.

[paulus@ozlabs.org - removed irq_chip field from struct
 kvmppc_passthru_irqmap; changed parameter for
 kvmppc_get_passthru_irqmap from struct kvm_vcpu * to struct
 kvm *, removed small cached array.]

Signed-off-by: Suresh Warrier <warrier@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index 94715e2..4ca2ba3 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -457,8 +457,18 @@ static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
 {
 	return vcpu->arch.irq_type == KVMPPC_IRQ_XICS;
 }
+
+static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
+				struct kvm *kvm)
+{
+	if (kvm)
+		return kvm->arch.pimap;
+	return NULL;
+}
+
 extern void kvmppc_alloc_host_rm_ops(void);
 extern void kvmppc_free_host_rm_ops(void);
+extern void kvmppc_free_pimap(struct kvm *kvm);
 extern void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu);
 extern int kvmppc_xics_create_icp(struct kvm_vcpu *vcpu, unsigned long server);
 extern int kvm_vm_ioctl_xics_irq(struct kvm *kvm, struct kvm_irq_level *args);
@@ -470,8 +480,12 @@ extern int kvmppc_xics_connect_vcpu(struct kvm_device *dev,
 extern void kvmppc_xics_ipi_action(void);
 extern int h_ipi_redirect;
 #else
+static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
+				struct kvm *kvm)
+	{ return NULL; }
 static inline void kvmppc_alloc_host_rm_ops(void) {};
 static inline void kvmppc_free_host_rm_ops(void) {};
+static inline void kvmppc_free_pimap(struct kvm *kvm) {};
 static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
 	{ return 0; }
 static inline void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu) { }