diff options
Diffstat (limited to 'hw/hyperv/hyperv.c')
| -rw-r--r-- | hw/hyperv/hyperv.c | 109 |
1 files changed, 76 insertions, 33 deletions
diff --git a/hw/hyperv/hyperv.c b/hw/hyperv/hyperv.c index cb1074f234..8b832566c1 100644 --- a/hw/hyperv/hyperv.c +++ b/hw/hyperv/hyperv.c @@ -27,13 +27,16 @@ struct SynICState { CPUState *cs; - bool enabled; + bool sctl_enabled; hwaddr msg_page_addr; hwaddr event_page_addr; MemoryRegion msg_page_mr; MemoryRegion event_page_mr; struct hyperv_message_page *msg_page; struct hyperv_event_flags_page *event_page; + + QemuMutex sint_routes_mutex; + QLIST_HEAD(, HvSintRoute) sint_routes; }; #define TYPE_SYNIC "hyperv-synic" @@ -51,11 +54,11 @@ static SynICState *get_synic(CPUState *cs) return SYNIC(object_resolve_path_component(OBJECT(cs), "synic")); } -static void synic_update(SynICState *synic, bool enable, +static void synic_update(SynICState *synic, bool sctl_enable, hwaddr msg_page_addr, hwaddr event_page_addr) { - synic->enabled = enable; + synic->sctl_enabled = sctl_enable; if (synic->msg_page_addr != msg_page_addr) { if (synic->msg_page_addr) { memory_region_del_subregion(get_system_memory(), @@ -80,7 +83,7 @@ static void synic_update(SynICState *synic, bool enable, } } -void hyperv_synic_update(CPUState *cs, bool enable, +void hyperv_synic_update(CPUState *cs, bool sctl_enable, hwaddr msg_page_addr, hwaddr event_page_addr) { SynICState *synic = get_synic(cs); @@ -89,7 +92,7 @@ void hyperv_synic_update(CPUState *cs, bool enable, return; } - synic_update(synic, enable, msg_page_addr, event_page_addr); + synic_update(synic, sctl_enable, msg_page_addr, event_page_addr); } static void synic_realize(DeviceState *dev, Error **errp) @@ -110,16 +113,20 @@ static void synic_realize(DeviceState *dev, Error **errp) sizeof(*synic->event_page), &error_abort); synic->msg_page = memory_region_get_ram_ptr(&synic->msg_page_mr); synic->event_page = memory_region_get_ram_ptr(&synic->event_page_mr); + qemu_mutex_init(&synic->sint_routes_mutex); + QLIST_INIT(&synic->sint_routes); g_free(msgp_name); g_free(eventp_name); } + static void synic_reset(DeviceState *dev) { SynICState *synic = SYNIC(dev); memset(synic->msg_page, 0, sizeof(*synic->msg_page)); memset(synic->event_page, 0, sizeof(*synic->event_page)); synic_update(synic, false, 0, 0); + assert(QLIST_EMPTY(&synic->sint_routes)); } static void synic_class_init(ObjectClass *klass, void *data) @@ -214,6 +221,7 @@ struct HvSintRoute { HvSintStagedMessage *staged_msg; unsigned refcount; + QLIST_ENTRY(HvSintRoute) link; }; static CPUState *hyperv_find_vcpu(uint32_t vp_index) @@ -259,7 +267,7 @@ static void cpu_post_msg(CPUState *cs, run_on_cpu_data data) assert(staged_msg->state == HV_STAGED_MSG_BUSY); - if (!synic->enabled || !synic->msg_page_addr) { + if (!synic->msg_page_addr) { staged_msg->status = -ENXIO; goto posted; } @@ -343,7 +351,7 @@ int hyperv_set_event_flag(HvSintRoute *sint_route, unsigned eventno) if (eventno > HV_EVENT_FLAGS_COUNT) { return -EINVAL; } - if (!synic->enabled || !synic->event_page_addr) { + if (!synic->sctl_enabled || !synic->event_page_addr) { return -ENXIO; } @@ -364,11 +372,12 @@ int hyperv_set_event_flag(HvSintRoute *sint_route, unsigned eventno) HvSintRoute *hyperv_sint_route_new(uint32_t vp_index, uint32_t sint, HvSintMsgCb cb, void *cb_data) { - HvSintRoute *sint_route; - EventNotifier *ack_notifier; + HvSintRoute *sint_route = NULL; + EventNotifier *ack_notifier = NULL; int r, gsi; CPUState *cs; SynICState *synic; + bool ack_event_initialized = false; cs = hyperv_find_vcpu(vp_index); if (!cs) { @@ -381,57 +390,77 @@ HvSintRoute *hyperv_sint_route_new(uint32_t vp_index, uint32_t sint, } sint_route = g_new0(HvSintRoute, 1); - r = event_notifier_init(&sint_route->sint_set_notifier, false); - if (r) { - goto err; + if (!sint_route) { + return NULL; } + sint_route->synic = synic; + sint_route->sint = sint; + sint_route->refcount = 1; ack_notifier = cb ? &sint_route->sint_ack_notifier : NULL; if (ack_notifier) { sint_route->staged_msg = g_new0(HvSintStagedMessage, 1); + if (!sint_route->staged_msg) { + goto cleanup_err_sint; + } sint_route->staged_msg->cb = cb; sint_route->staged_msg->cb_data = cb_data; r = event_notifier_init(ack_notifier, false); if (r) { - goto err_sint_set_notifier; + goto cleanup_err_sint; } - event_notifier_set_handler(ack_notifier, sint_ack_handler); + ack_event_initialized = true; + } + + /* See if we are done or we need to setup a GSI for this SintRoute */ + if (!synic->sctl_enabled) { + goto cleanup; + } + + /* We need to setup a GSI for this SintRoute */ + r = event_notifier_init(&sint_route->sint_set_notifier, false); + if (r) { + goto cleanup_err_sint; } gsi = kvm_irqchip_add_hv_sint_route(kvm_state, vp_index, sint); if (gsi < 0) { - goto err_gsi; + goto cleanup_err_sint_notifier; } r = kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, &sint_route->sint_set_notifier, ack_notifier, gsi); if (r) { - goto err_irqfd; + goto cleanup_err_irqfd; } sint_route->gsi = gsi; - sint_route->synic = synic; - sint_route->sint = sint; - sint_route->refcount = 1; - +cleanup: + qemu_mutex_lock(&synic->sint_routes_mutex); + QLIST_INSERT_HEAD(&synic->sint_routes, sint_route, link); + qemu_mutex_unlock(&synic->sint_routes_mutex); return sint_route; -err_irqfd: +cleanup_err_irqfd: kvm_irqchip_release_virq(kvm_state, gsi); -err_gsi: + +cleanup_err_sint_notifier: + event_notifier_cleanup(&sint_route->sint_set_notifier); + +cleanup_err_sint: if (ack_notifier) { - event_notifier_set_handler(ack_notifier, NULL); - event_notifier_cleanup(ack_notifier); + if (ack_event_initialized) { + event_notifier_set_handler(ack_notifier, NULL); + event_notifier_cleanup(ack_notifier); + } + g_free(sint_route->staged_msg); } -err_sint_set_notifier: - event_notifier_cleanup(&sint_route->sint_set_notifier); -err: - g_free(sint_route); + g_free(sint_route); return NULL; } @@ -442,6 +471,8 @@ void hyperv_sint_route_ref(HvSintRoute *sint_route) void hyperv_sint_route_unref(HvSintRoute *sint_route) { + SynICState *synic; + if (!sint_route) { return; } @@ -452,21 +483,33 @@ void hyperv_sint_route_unref(HvSintRoute *sint_route) return; } - kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, - &sint_route->sint_set_notifier, - sint_route->gsi); - kvm_irqchip_release_virq(kvm_state, sint_route->gsi); + synic = sint_route->synic; + qemu_mutex_lock(&synic->sint_routes_mutex); + QLIST_REMOVE(sint_route, link); + qemu_mutex_unlock(&synic->sint_routes_mutex); + + if (sint_route->gsi) { + kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, + &sint_route->sint_set_notifier, + sint_route->gsi); + kvm_irqchip_release_virq(kvm_state, sint_route->gsi); + event_notifier_cleanup(&sint_route->sint_set_notifier); + } + if (sint_route->staged_msg) { event_notifier_set_handler(&sint_route->sint_ack_notifier, NULL); event_notifier_cleanup(&sint_route->sint_ack_notifier); g_free(sint_route->staged_msg); } - event_notifier_cleanup(&sint_route->sint_set_notifier); g_free(sint_route); } int hyperv_sint_route_set_sint(HvSintRoute *sint_route) { + if (!sint_route->gsi) { + return 0; + } + return event_notifier_set(&sint_route->sint_set_notifier); } |