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Violators will be prosecuted for from ; Sun, 30 Apr 2017 14:26:16 -0300 From: Daniel Henrique Barboza Date: Sun, 30 Apr 2017 14:25:47 -0300 In-Reply-To: <20170430172547.13415-1-danielhb@linux.vnet.ibm.com> References: <20170430172547.13415-1-danielhb@linux.vnet.ibm.com> Message-Id: <20170430172547.13415-6-danielhb@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 5/5] migration: spapr: migrate pending_events of spapr state List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-ppc@nongnu.org, david@gibson.dropbear.id.au From: Jianjun Duan In racing situations between hotplug events and migration operation, a rtas hotplug event could have not yet be delivered to the source guest when migration is started. In this case the pending_events of spapr state need be transmitted to the target so that the hotplug event can be finished on the target. All the different fields of the events are encoded as defined by PAPR. We can migrate them as uint8_t binary stream without any concerns about data padding or endianess. pending_events is put in a subsection in the spapr state VMSD to make sure migration across different versions is not broken. Signed-off-by: Jianjun Duan Signed-off-by: Daniel Henrique Barboza --- hw/ppc/spapr.c | 33 +++++++++++++++++++++++++++++++++ hw/ppc/spapr_events.c | 24 +++++++++++++----------- include/hw/ppc/spapr.h | 3 ++- 3 files changed, 48 insertions(+), 12 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index cb3f0e8..cd42449 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -1468,6 +1468,38 @@ static const VMStateDescription vmstate_spapr_ccs_list = { }, }; +static bool spapr_pending_events_needed(void *opaque) +{ + sPAPRMachineState *spapr = (sPAPRMachineState *)opaque; + return !QTAILQ_EMPTY(&spapr->pending_events); +} + +static const VMStateDescription vmstate_spapr_event_entry = { + .name = "spapr_event_log_entry", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_INT32(log_type, sPAPREventLogEntry), + VMSTATE_BOOL(exception, sPAPREventLogEntry), + VMSTATE_UINT32(data_size, sPAPREventLogEntry), + VMSTATE_VARRAY_UINT32_ALLOC(data, sPAPREventLogEntry, data_size, + 0, vmstate_info_uint8, uint8_t), + VMSTATE_END_OF_LIST() + }, +}; + +static const VMStateDescription vmstate_spapr_pending_events = { + .name = "spapr_pending_events", + .version_id = 1, + .minimum_version_id = 1, + .needed = spapr_pending_events_needed, + .fields = (VMStateField[]) { + VMSTATE_QTAILQ_V(pending_events, sPAPRMachineState, 1, + vmstate_spapr_event_entry, sPAPREventLogEntry, next), + VMSTATE_END_OF_LIST() + }, +}; + static bool spapr_ov5_cas_needed(void *opaque) { sPAPRMachineState *spapr = opaque; @@ -1567,6 +1599,7 @@ static const VMStateDescription vmstate_spapr = { &vmstate_spapr_ov5_cas, &vmstate_spapr_patb_entry, &vmstate_spapr_ccs_list, + &vmstate_spapr_pending_events, NULL } }; diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c index f0b28d8..70c7cfc 100644 --- a/hw/ppc/spapr_events.c +++ b/hw/ppc/spapr_events.c @@ -342,7 +342,8 @@ static int rtas_event_log_to_irq(sPAPRMachineState *spapr, int log_type) return source->irq; } -static void rtas_event_log_queue(int log_type, void *data, bool exception) +static void rtas_event_log_queue(int log_type, void *data, bool exception, + int data_size) { sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); sPAPREventLogEntry *entry = g_new(sPAPREventLogEntry, 1); @@ -351,6 +352,7 @@ static void rtas_event_log_queue(int log_type, void *data, bool exception) entry->log_type = log_type; entry->exception = exception; entry->data = data; + entry->data_size = data_size; QTAILQ_INSERT_TAIL(&spapr->pending_events, entry, next); } @@ -445,6 +447,7 @@ static void spapr_powerdown_req(Notifier *n, void *opaque) struct rtas_event_log_v6_mainb *mainb; struct rtas_event_log_v6_epow *epow; struct epow_log_full *new_epow; + uint32_t data_size; new_epow = g_malloc0(sizeof(*new_epow)); hdr = &new_epow->hdr; @@ -453,14 +456,13 @@ static void spapr_powerdown_req(Notifier *n, void *opaque) mainb = &new_epow->mainb; epow = &new_epow->epow; + data_size = sizeof(*new_epow); hdr->summary = cpu_to_be32(RTAS_LOG_VERSION_6 | RTAS_LOG_SEVERITY_EVENT | RTAS_LOG_DISPOSITION_NOT_RECOVERED | RTAS_LOG_OPTIONAL_PART_PRESENT | RTAS_LOG_TYPE_EPOW); - hdr->extended_length = cpu_to_be32(sizeof(*new_epow) - - sizeof(new_epow->hdr)); - + hdr->extended_length = cpu_to_be32(data_size - sizeof(new_epow->hdr)); spapr_init_v6hdr(v6hdr); spapr_init_maina(maina, 3 /* Main-A, Main-B and EPOW */); @@ -479,7 +481,7 @@ static void spapr_powerdown_req(Notifier *n, void *opaque) epow->event_modifier = RTAS_LOG_V6_EPOW_MODIFIER_NORMAL; epow->extended_modifier = RTAS_LOG_V6_EPOW_XMODIFIER_PARTITION_SPECIFIC; - rtas_event_log_queue(RTAS_LOG_TYPE_EPOW, new_epow, true); + rtas_event_log_queue(RTAS_LOG_TYPE_EPOW, new_epow, true, data_size); qemu_irq_pulse(xics_get_qirq(XICS_FABRIC(spapr), rtas_event_log_to_irq(spapr, @@ -504,6 +506,7 @@ static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action, struct rtas_event_log_v6_maina *maina; struct rtas_event_log_v6_mainb *mainb; struct rtas_event_log_v6_hp *hp; + uint32_t data_size; new_hp = g_malloc0(sizeof(struct hp_log_full)); hdr = &new_hp->hdr; @@ -512,14 +515,14 @@ static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action, mainb = &new_hp->mainb; hp = &new_hp->hp; + data_size = sizeof(*new_hp); hdr->summary = cpu_to_be32(RTAS_LOG_VERSION_6 | RTAS_LOG_SEVERITY_EVENT | RTAS_LOG_DISPOSITION_NOT_RECOVERED | RTAS_LOG_OPTIONAL_PART_PRESENT | RTAS_LOG_INITIATOR_HOTPLUG | RTAS_LOG_TYPE_HOTPLUG); - hdr->extended_length = cpu_to_be32(sizeof(*new_hp) - - sizeof(new_hp->hdr)); + hdr->extended_length = cpu_to_be32(data_size - sizeof(new_hp->hdr)); spapr_init_v6hdr(v6hdr); spapr_init_maina(maina, 3 /* Main-A, Main-B, HP */); @@ -572,7 +575,7 @@ static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action, cpu_to_be32(drc_id->count_indexed.index); } - rtas_event_log_queue(RTAS_LOG_TYPE_HOTPLUG, new_hp, true); + rtas_event_log_queue(RTAS_LOG_TYPE_HOTPLUG, new_hp, true, data_size); qemu_irq_pulse(xics_get_qirq(XICS_FABRIC(spapr), rtas_event_log_to_irq(spapr, @@ -671,8 +674,7 @@ static void check_exception(PowerPCCPU *cpu, sPAPRMachineState *spapr, if (!event) { goto out_no_events; } - - hdr = event->data; + hdr = (struct rtas_error_log *)event->data; event_len = be32_to_cpu(hdr->extended_length) + sizeof(*hdr); if (event_len < len) { @@ -728,7 +730,7 @@ static void event_scan(PowerPCCPU *cpu, sPAPRMachineState *spapr, goto out_no_events; } - hdr = event->data; + hdr = (struct rtas_error_log *)event->data; event_len = be32_to_cpu(hdr->extended_length) + sizeof(*hdr); if (event_len < len) { diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 5802f88..fbe1d93 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -599,7 +599,8 @@ sPAPRTCETable *spapr_tce_find_by_liobn(target_ulong liobn); struct sPAPREventLogEntry { int log_type; bool exception; - void *data; + uint8_t *data; + uint32_t data_size; QTAILQ_ENTRY(sPAPREventLogEntry) next; }; -- 2.9.3