From 8daaafc88b46fb3af952e92d7c2816a8950e1363 Mon Sep 17 00:00:00 2001 From: Suresh Warrier Date: Fri, 19 Aug 2016 15:35:48 +1000 Subject: [PATCH] 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 Signed-off-by: Paul Mackerras --- arch/powerpc/include/asm/kvm_host.h | 17 +++++++++++++++++ arch/powerpc/include/asm/kvm_ppc.h | 14 ++++++++++++++ arch/powerpc/kvm/book3s_hv.c | 13 +++++++++++++ 3 files changed, 44 insertions(+) diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 373003f4551d..89ac1f6c2cb2 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -203,6 +203,8 @@ struct kvmppc_spapr_tce_table { 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 @@ struct kvm_arch { #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 @@ struct kvmhv_tb_accumulator { 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 diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 94715e22d6a2..4ca2ba36a860 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) { } diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 30ff8ab5aba1..d5c7061b9045 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -3412,6 +3412,19 @@ static int kvmppc_core_check_processor_compat_hv(void) return 0; } +#ifdef CONFIG_KVM_XICS + +void kvmppc_free_pimap(struct kvm *kvm) +{ + kfree(kvm->arch.pimap); +} + +struct kvmppc_passthru_irqmap *kvmppc_alloc_pimap(void) +{ + return kzalloc(sizeof(struct kvmppc_passthru_irqmap), GFP_KERNEL); +} +#endif + static long kvm_arch_vm_ioctl_hv(struct file *filp, unsigned int ioctl, unsigned long arg) { -- 2.20.1