From ab9074b559823a22822db9e299198c53169c34ea Mon Sep 17 00:00:00 2001 From: Heinz Graalfs Date: Mon, 29 Oct 2012 02:13:24 +0000 Subject: s390: sclp signal quiesce support This implements the sclp signal quiesce event via the SCLP Event Facility. This allows to gracefully shutdown a guest by using system_powerdown notifiers. It creates a service interrupt that will trigger a Read Event Data command from the guest. This code will then add an event that is interpreted by linux guests as ctrl-alt-del. Signed-off-by: Heinz Graalfs Signed-off-by: Christian Borntraeger Signed-off-by: Jens Freimann Signed-off-by: Alexander Graf --- hw/s390x/sclpquiesce.c | 123 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 hw/s390x/sclpquiesce.c (limited to 'hw/s390x/sclpquiesce.c') diff --git a/hw/s390x/sclpquiesce.c b/hw/s390x/sclpquiesce.c new file mode 100644 index 0000000000..9a773b87ff --- /dev/null +++ b/hw/s390x/sclpquiesce.c @@ -0,0 +1,123 @@ +/* + * SCLP event type + * Signal Quiesce - trigger system powerdown request + * + * Copyright IBM, Corp. 2012 + * + * Authors: + * Heinz Graalfs + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at your + * option) any later version. See the COPYING file in the top-level directory. + * + */ +#include +#include "sysemu.h" +#include "sclp.h" +#include "event-facility.h" + +typedef struct SignalQuiesce { + EventBufferHeader ebh; + uint16_t timeout; + uint8_t unit; +} QEMU_PACKED SignalQuiesce; + +static int event_type(void) +{ + return SCLP_EVENT_SIGNAL_QUIESCE; +} + +static unsigned int send_mask(void) +{ + return SCLP_EVENT_MASK_SIGNAL_QUIESCE; +} + +static unsigned int receive_mask(void) +{ + return 0; +} + +static int read_event_data(SCLPEvent *event, EventBufferHeader *evt_buf_hdr, + int *slen) +{ + SignalQuiesce *sq = (SignalQuiesce *) evt_buf_hdr; + + if (*slen < sizeof(SignalQuiesce)) { + return 0; + } + + if (!event->event_pending) { + return 0; + } + event->event_pending = false; + + sq->ebh.length = cpu_to_be16(sizeof(SignalQuiesce)); + sq->ebh.type = SCLP_EVENT_SIGNAL_QUIESCE; + sq->ebh.flags |= SCLP_EVENT_BUFFER_ACCEPTED; + /* + * system_powerdown does not have a timeout. Fortunately the + * timeout value is currently ignored by Linux, anyway + */ + sq->timeout = cpu_to_be16(0); + sq->unit = cpu_to_be16(0); + *slen -= sizeof(SignalQuiesce); + + return 1; +} + +typedef struct QuiesceNotifier QuiesceNotifier; + +static struct QuiesceNotifier { + Notifier notifier; + SCLPEvent *event; +} qn; + +static void quiesce_powerdown_req(Notifier *n, void *opaque) +{ + QuiesceNotifier *qn = container_of(n, QuiesceNotifier, notifier); + SCLPEvent *event = qn->event; + + event->event_pending = true; + /* trigger SCLP read operation */ + sclp_service_interrupt(0); +} + +static int quiesce_init(SCLPEvent *event) +{ + event->event_type = SCLP_EVENT_SIGNAL_QUIESCE; + + qn.notifier.notify = quiesce_powerdown_req; + qn.event = event; + + qemu_register_powerdown_notifier(&qn.notifier); + + return 0; +} + +static void quiesce_class_init(ObjectClass *klass, void *data) +{ + SCLPEventClass *k = SCLP_EVENT_CLASS(klass); + + k->init = quiesce_init; + + k->get_send_mask = send_mask; + k->get_receive_mask = receive_mask; + k->event_type = event_type; + k->read_event_data = read_event_data; + k->write_event_data = NULL; +} + +static TypeInfo sclp_quiesce_info = { + .name = "sclpquiesce", + .parent = TYPE_SCLP_EVENT, + .instance_size = sizeof(SCLPEvent), + .class_init = quiesce_class_init, + .class_size = sizeof(SCLPEventClass), +}; + +static void register_types(void) +{ + type_register_static(&sclp_quiesce_info); +} + +type_init(register_types) -- cgit v1.2.3 From 9c17d615a66ebd655871bf891ec0fe901ad8b332 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Mon, 17 Dec 2012 18:20:04 +0100 Subject: softmmu: move include files to include/sysemu/ Signed-off-by: Paolo Bonzini --- hw/s390x/sclpquiesce.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'hw/s390x/sclpquiesce.c') diff --git a/hw/s390x/sclpquiesce.c b/hw/s390x/sclpquiesce.c index 9a773b87ff..6e6f5624df 100644 --- a/hw/s390x/sclpquiesce.c +++ b/hw/s390x/sclpquiesce.c @@ -12,7 +12,7 @@ * */ #include -#include "sysemu.h" +#include "sysemu/sysemu.h" #include "sclp.h" #include "event-facility.h" -- cgit v1.2.3