projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| ab9074b5 HG |
1 | /* |
| 2 | * SCLP event type | |
| 3 | * Signal Quiesce - trigger system powerdown request | |
| 4 | * | |
| 5 | * Copyright IBM, Corp. 2012 | |
| 6 | * | |
| 7 | * Authors: | |
| 8 | * Heinz Graalfs <graalfs@de.ibm.com> | |
| 9 | * | |
| 10 | * This work is licensed under the terms of the GNU GPL, version 2 or (at your | |
| 11 | * option) any later version. See the COPYING file in the top-level directory. | |
| 12 | * | |
| 13 | */ | |
| 14 | #include <hw/qdev.h> | |
| 15 | #include "sysemu.h" | |
| 16 | #include "sclp.h" | |
| 17 | #include "event-facility.h" | |
| 18 | ||
| 19 | typedef struct SignalQuiesce { | |
| 20 | EventBufferHeader ebh; | |
| 21 | uint16_t timeout; | |
| 22 | uint8_t unit; | |
| 23 | } QEMU_PACKED SignalQuiesce; | |
| 24 | ||
| 25 | static int event_type(void) | |
| 26 | { | |
| 27 | return SCLP_EVENT_SIGNAL_QUIESCE; | |
| 28 | } | |
| 29 | ||
| 30 | static unsigned int send_mask(void) | |
| 31 | { | |
| 32 | return SCLP_EVENT_MASK_SIGNAL_QUIESCE; | |
| 33 | } | |
| 34 | ||
| 35 | static unsigned int receive_mask(void) | |
| 36 | { | |
| 37 | return 0; | |
| 38 | } | |
| 39 | ||
| 40 | static int read_event_data(SCLPEvent *event, EventBufferHeader *evt_buf_hdr, | |
| 41 | int *slen) | |
| 42 | { | |
| 43 | SignalQuiesce *sq = (SignalQuiesce *) evt_buf_hdr; | |
| 44 | ||
| 45 | if (*slen < sizeof(SignalQuiesce)) { | |
| 46 | return 0; | |
| 47 | } | |
| 48 | ||
| 49 | if (!event->event_pending) { | |
| 50 | return 0; | |
| 51 | } | |
| 52 | event->event_pending = false; | |
| 53 | ||
| 54 | sq->ebh.length = cpu_to_be16(sizeof(SignalQuiesce)); | |
| 55 | sq->ebh.type = SCLP_EVENT_SIGNAL_QUIESCE; | |
| 56 | sq->ebh.flags |= SCLP_EVENT_BUFFER_ACCEPTED; | |
| 57 | /* | |
| 58 | * system_powerdown does not have a timeout. Fortunately the | |
| 59 | * timeout value is currently ignored by Linux, anyway | |
| 60 | */ | |
| 61 | sq->timeout = cpu_to_be16(0); | |
| 62 | sq->unit = cpu_to_be16(0); | |
| 63 | *slen -= sizeof(SignalQuiesce); | |
| 64 | ||
| 65 | return 1; | |
| 66 | } | |
| 67 | ||
| 68 | typedef struct QuiesceNotifier QuiesceNotifier; | |
| 69 | ||
| 70 | static struct QuiesceNotifier { | |
| 71 | Notifier notifier; | |
| 72 | SCLPEvent *event; | |
| 73 | } qn; | |
| 74 | ||
| 75 | static void quiesce_powerdown_req(Notifier *n, void *opaque) | |
| 76 | { | |
| 77 | QuiesceNotifier *qn = container_of(n, QuiesceNotifier, notifier); | |
| 78 | SCLPEvent *event = qn->event; | |
| 79 | ||
| 80 | event->event_pending = true; | |
| 81 | /* trigger SCLP read operation */ | |
| 82 | sclp_service_interrupt(0); | |
| 83 | } | |
| 84 | ||
| 85 | static int quiesce_init(SCLPEvent *event) | |
| 86 | { | |
| 87 | event->event_type = SCLP_EVENT_SIGNAL_QUIESCE; | |
| 88 | ||
| 89 | qn.notifier.notify = quiesce_powerdown_req; | |
| 90 | qn.event = event; | |
| 91 | ||
| 92 | qemu_register_powerdown_notifier(&qn.notifier); | |
| 93 | ||
| 94 | return 0; | |
| 95 | } | |
| 96 | ||
| 97 | static void quiesce_class_init(ObjectClass *klass, void *data) | |
| 98 | { | |
| 99 | SCLPEventClass *k = SCLP_EVENT_CLASS(klass); | |
| 100 | ||
| 101 | k->init = quiesce_init; | |
| 102 | ||
| 103 | k->get_send_mask = send_mask; | |
| 104 | k->get_receive_mask = receive_mask; | |
| 105 | k->event_type = event_type; | |
| 106 | k->read_event_data = read_event_data; | |
| 107 | k->write_event_data = NULL; | |
| 108 | } | |
| 109 | ||
| 110 | static TypeInfo sclp_quiesce_info = { | |
| 111 | .name = "sclpquiesce", | |
| 112 | .parent = TYPE_SCLP_EVENT, | |
| 113 | .instance_size = sizeof(SCLPEvent), | |
| 114 | .class_init = quiesce_class_init, | |
| 115 | .class_size = sizeof(SCLPEventClass), | |
| 116 | }; | |
| 117 | ||
| 118 | static void register_types(void) | |
| 119 | { | |
| 120 | type_register_static(&sclp_quiesce_info); | |
| 121 | } | |
| 122 | ||
| 123 | type_init(register_types) |