projects / mirror_qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 49204458 JH |
1 | /* |
| 2 | * SCLP event type | |
| 3 | * Signal CPU - Trigger SCLP interrupt for system CPU configure or | |
| 4 | * de-configure | |
| 5 | * | |
| 6 | * Copyright IBM, Corp. 2013 | |
| 7 | * | |
| 8 | * Authors: | |
| 9 | * Thang Pham <thang.pham@us.ibm.com> | |
| 10 | * | |
| 11 | * This work is licensed under the terms of the GNU GPL, version 2 or (at your | |
| 12 | * option) any later version. See the COPYING file in the top-level directory. | |
| 13 | * | |
| 14 | */ | |
| 15 | #include "sysemu/sysemu.h" | |
| 16 | #include "hw/s390x/sclp.h" | |
| 17 | #include "hw/s390x/event-facility.h" | |
| 18 | #include "cpu.h" | |
| 19 | #include "sysemu/cpus.h" | |
| 20 | #include "sysemu/kvm.h" | |
| 21 | ||
| 22 | typedef struct ConfigMgtData { | |
| 23 | EventBufferHeader ebh; | |
| 24 | uint8_t reserved; | |
| 25 | uint8_t event_qualifier; | |
| 26 | } QEMU_PACKED ConfigMgtData; | |
| 27 | ||
| 7b53f294 | 28 | static qemu_irq *irq_cpu_hotplug; /* Only used in this file */ |
| 49204458 JH |
29 | |
| 30 | #define EVENT_QUAL_CPU_CHANGE 1 | |
| 31 | ||
| 32 | void raise_irq_cpu_hotplug(void) | |
| 33 | { | |
| 7b53f294 | 34 | qemu_irq_raise(*irq_cpu_hotplug); |
| 49204458 JH |
35 | } |
| 36 | ||
| 37 | static unsigned int send_mask(void) | |
| 38 | { | |
| 39 | return SCLP_EVENT_MASK_CONFIG_MGT_DATA; | |
| 40 | } | |
| 41 | ||
| 42 | static unsigned int receive_mask(void) | |
| 43 | { | |
| 44 | return 0; | |
| 45 | } | |
| 46 | ||
| 47 | static int read_event_data(SCLPEvent *event, EventBufferHeader *evt_buf_hdr, | |
| 48 | int *slen) | |
| 49 | { | |
| 50 | ConfigMgtData *cdata = (ConfigMgtData *) evt_buf_hdr; | |
| 51 | if (*slen < sizeof(ConfigMgtData)) { | |
| 52 | return 0; | |
| 53 | } | |
| 54 | ||
| 55 | /* Event is no longer pending */ | |
| 56 | if (!event->event_pending) { | |
| 57 | return 0; | |
| 58 | } | |
| 59 | event->event_pending = false; | |
| 60 | ||
| 61 | /* Event header data */ | |
| 62 | cdata->ebh.length = cpu_to_be16(sizeof(ConfigMgtData)); | |
| 63 | cdata->ebh.type = SCLP_EVENT_CONFIG_MGT_DATA; | |
| 64 | cdata->ebh.flags |= SCLP_EVENT_BUFFER_ACCEPTED; | |
| 65 | ||
| 66 | /* Trigger a rescan of CPUs by setting event qualifier */ | |
| 67 | cdata->event_qualifier = EVENT_QUAL_CPU_CHANGE; | |
| 68 | *slen -= sizeof(ConfigMgtData); | |
| 69 | ||
| 70 | return 1; | |
| 71 | } | |
| 72 | ||
| 73 | static void trigger_signal(void *opaque, int n, int level) | |
| 74 | { | |
| 75 | SCLPEvent *event = opaque; | |
| 76 | event->event_pending = true; | |
| 77 | ||
| 78 | /* Trigger SCLP read operation */ | |
| 79 | sclp_service_interrupt(0); | |
| 80 | } | |
| 81 | ||
| 82 | static int irq_cpu_hotplug_init(SCLPEvent *event) | |
| 83 | { | |
| 7b53f294 | 84 | irq_cpu_hotplug = qemu_allocate_irqs(trigger_signal, event, 1); |
| 49204458 JH |
85 | return 0; |
| 86 | } | |
| 87 | ||
| 88 | static void cpu_class_init(ObjectClass *oc, void *data) | |
| 89 | { | |
| 90 | SCLPEventClass *k = SCLP_EVENT_CLASS(oc); | |
| 91 | ||
| 92 | k->init = irq_cpu_hotplug_init; | |
| 93 | k->get_send_mask = send_mask; | |
| 94 | k->get_receive_mask = receive_mask; | |
| 95 | k->read_event_data = read_event_data; | |
| 96 | k->write_event_data = NULL; | |
| 97 | } | |
| 98 | ||
| 99 | static const TypeInfo sclp_cpu_info = { | |
| 100 | .name = "sclp-cpu-hotplug", | |
| 101 | .parent = TYPE_SCLP_EVENT, | |
| 102 | .instance_size = sizeof(SCLPEvent), | |
| 103 | .class_init = cpu_class_init, | |
| 104 | .class_size = sizeof(SCLPEventClass), | |
| 105 | }; | |
| 106 | ||
| 107 | static void sclp_cpu_register_types(void) | |
| 108 | { | |
| 109 | type_register_static(&sclp_cpu_info); | |
| 110 | } | |
| 111 | ||
| 112 | type_init(sclp_cpu_register_types) |