diff options
Diffstat (limited to 'kvm-all.c')
| -rw-r--r-- | kvm-all.c | 149 |
1 files changed, 149 insertions, 0 deletions
@@ -78,6 +78,13 @@ struct KVMState int pit_in_kernel; int xsave, xcrs; int many_ioeventfds; + int irqchip_inject_ioctl; +#ifdef KVM_CAP_IRQ_ROUTING + struct kvm_irq_routing *irq_routes; + int nr_allocated_irq_routes; + uint32_t *used_gsi_bitmap; + unsigned int max_gsi; +#endif }; KVMState *kvm_state; @@ -728,6 +735,138 @@ static void kvm_handle_interrupt(CPUState *env, int mask) } } +int kvm_irqchip_set_irq(KVMState *s, int irq, int level) +{ + struct kvm_irq_level event; + int ret; + + assert(s->irqchip_in_kernel); + + event.level = level; + event.irq = irq; + ret = kvm_vm_ioctl(s, s->irqchip_inject_ioctl, &event); + if (ret < 0) { + perror("kvm_set_irqchip_line"); + abort(); + } + + return (s->irqchip_inject_ioctl == KVM_IRQ_LINE) ? 1 : event.status; +} + +#ifdef KVM_CAP_IRQ_ROUTING +static void set_gsi(KVMState *s, unsigned int gsi) +{ + assert(gsi < s->max_gsi); + + s->used_gsi_bitmap[gsi / 32] |= 1U << (gsi % 32); +} + +static void kvm_init_irq_routing(KVMState *s) +{ + int gsi_count; + + gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING); + if (gsi_count > 0) { + unsigned int gsi_bits, i; + + /* Round up so we can search ints using ffs */ + gsi_bits = (gsi_count + 31) / 32; + s->used_gsi_bitmap = g_malloc0(gsi_bits / 8); + s->max_gsi = gsi_bits; + + /* Mark any over-allocated bits as already in use */ + for (i = gsi_count; i < gsi_bits; i++) { + set_gsi(s, i); + } + } + + s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); + s->nr_allocated_irq_routes = 0; + + kvm_arch_init_irq_routing(s); +} + +static void kvm_add_routing_entry(KVMState *s, + struct kvm_irq_routing_entry *entry) +{ + struct kvm_irq_routing_entry *new; + int n, size; + + if (s->irq_routes->nr == s->nr_allocated_irq_routes) { + n = s->nr_allocated_irq_routes * 2; + if (n < 64) { + n = 64; + } + size = sizeof(struct kvm_irq_routing); + size += n * sizeof(*new); + s->irq_routes = g_realloc(s->irq_routes, size); + s->nr_allocated_irq_routes = n; + } + n = s->irq_routes->nr++; + new = &s->irq_routes->entries[n]; + memset(new, 0, sizeof(*new)); + new->gsi = entry->gsi; + new->type = entry->type; + new->flags = entry->flags; + new->u = entry->u; + + set_gsi(s, entry->gsi); +} + +void kvm_irqchip_add_route(KVMState *s, int irq, int irqchip, int pin) +{ + struct kvm_irq_routing_entry e; + + e.gsi = irq; + e.type = KVM_IRQ_ROUTING_IRQCHIP; + e.flags = 0; + e.u.irqchip.irqchip = irqchip; + e.u.irqchip.pin = pin; + kvm_add_routing_entry(s, &e); +} + +int kvm_irqchip_commit_routes(KVMState *s) +{ + s->irq_routes->flags = 0; + return kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); +} + +#else /* !KVM_CAP_IRQ_ROUTING */ + +static void kvm_init_irq_routing(KVMState *s) +{ +} +#endif /* !KVM_CAP_IRQ_ROUTING */ + +static int kvm_irqchip_create(KVMState *s) +{ + QemuOptsList *list = qemu_find_opts("machine"); + int ret; + + if (QTAILQ_EMPTY(&list->head) || + !qemu_opt_get_bool(QTAILQ_FIRST(&list->head), + "kernel_irqchip", false) || + !kvm_check_extension(s, KVM_CAP_IRQCHIP)) { + return 0; + } + + ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); + if (ret < 0) { + fprintf(stderr, "Create kernel irqchip failed\n"); + return ret; + } + + s->irqchip_inject_ioctl = KVM_IRQ_LINE; + if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { + s->irqchip_inject_ioctl = KVM_IRQ_LINE_STATUS; + } + s->irqchip_in_kernel = 1; + + kvm_init_irq_routing(s); + + return 0; +} + int kvm_init(void) { static const char upgrade_note[] = @@ -823,6 +962,11 @@ int kvm_init(void) goto err; } + ret = kvm_irqchip_create(s); + if (ret < 0) { + goto err; + } + kvm_state = s; memory_listener_register(&kvm_memory_listener); @@ -1158,6 +1302,11 @@ int kvm_has_many_ioeventfds(void) return kvm_state->many_ioeventfds; } +int kvm_has_gsi_routing(void) +{ + return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); +} + void kvm_setup_guest_memory(void *start, size_t size) { if (!kvm_has_sync_mmu()) { |