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KVM: PPC: Book3S HV: Introduce kvmppc_passthru_irqmap

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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>
This commit is contained in:
Suresh Warrier 2016-08-19 15:35:48 +10:00 committed by Paul Mackerras
parent 9576730d0e
commit 8daaafc88b
3 changed files with 44 additions and 0 deletions
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17
arch/powerpc/include/asm/kvm_host.h
View File

@ -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

14
arch/powerpc/include/asm/kvm_ppc.h
View File

@ -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) { }

13
arch/powerpc/kvm/book3s_hv.c
View File

@ -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)
{