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>
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 373003f..89ac1f6 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -203,6 +203,8 @@
struct kvmppc_xics;
struct kvmppc_icp;
+struct kvmppc_passthru_irqmap;
+
/*
* The reverse mapping array has one entry for each HPTE,
* which stores the guest's view of the second word of the HPTE
@@ -273,6 +275,7 @@
#endif
#ifdef CONFIG_KVM_XICS
struct kvmppc_xics *xics;
+ struct kvmppc_passthru_irqmap *pimap;
#endif
struct kvmppc_ops *kvm_ops;
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
@@ -369,6 +372,20 @@
u64 tb_max; /* max time */
};
+#ifdef CONFIG_PPC_BOOK3S_64
+struct kvmppc_irq_map {
+ u32 r_hwirq;
+ u32 v_hwirq;
+ struct irq_desc *desc;
+};
+
+#define KVMPPC_PIRQ_MAPPED 1024
+struct kvmppc_passthru_irqmap {
+ int n_mapped;
+ struct kvmppc_irq_map mapped[KVMPPC_PIRQ_MAPPED];
+};
+#endif
+
# ifdef CONFIG_PPC_FSL_BOOK3E
#define KVMPPC_BOOKE_IAC_NUM 2
#define KVMPPC_BOOKE_DAC_NUM 2