From: Michael Roth <mdr...@linux.vnet.ibm.com>
Hotplugging PHBs is a machine-level operation, but PHBs reside on the
main system bus, so we register spapr machine as the handler for the
main system bus.
We re-get the phandle of the interrupt controller systematically for
simplicity.
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
Signed-off-by: Greg Kurz <gr...@kaod.org>
---
hw/ppc/spapr.c | 147 ++++++++++++++++++++++++++++++++++++++++++++++++
hw/ppc/spapr_drc.c | 1
hw/ppc/spapr_pci.c | 16 -----
include/hw/ppc/spapr.h | 1
4 files changed, 149 insertions(+), 16 deletions(-)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 5c405a5fafca..065c9f19700e 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2923,6 +2923,10 @@ static void spapr_machine_init(MachineState *machine)
register_savevm_live(NULL, "spapr/htab", -1, 1,
&savevm_htab_handlers, spapr);
+ if (smc->dr_phb_enabled) {
+ qbus_set_hotplug_handler(sysbus_get_default(), OBJECT(machine), NULL);
+ }
+
qemu_register_boot_set(spapr_boot_set, spapr);
if (kvm_enabled()) {
@@ -3716,6 +3720,135 @@ out:
error_propagate(errp, local_err);
}
+static void spapr_phb_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
+ Error **errp)
+{
+ sPAPRMachineState *spapr = SPAPR_MACHINE(OBJECT(hotplug_dev));
+ sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(dev);
+ sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
+ const unsigned windows_supported = spapr_phb_windows_supported(sphb);
+
+ if (sphb->index == (uint32_t)-1) {
+ error_setg(errp, "\"index\" for PAPR PHB is mandatory");
+ return;
+ }
+
+ /*
+ * This will check that sphb->index doesn't exceed the maximum number of
+ * PHBs for the current machine type.
+ */
+ smc->phb_placement(spapr, sphb->index,
+ &sphb->buid, &sphb->io_win_addr,
+ &sphb->mem_win_addr, &sphb->mem64_win_addr,
+ windows_supported, sphb->dma_liobn, errp);
+}
+
+static void spapr_phb_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
+ Error **errp)
+{
+ sPAPRMachineState *spapr = SPAPR_MACHINE(OBJECT(hotplug_dev));
+ sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
+ sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(dev);
+ void *fdt = NULL;
+ int fdt_start_offset;
+ int fdt_size;
+ Error *local_err = NULL;
+ sPAPRDRConnector *drc;
+ int ret;
+ bool hotplugged = spapr_drc_hotplugged(dev);
+ int offset, phandle = 0;
+ gchar *nodename = NULL;
+
+ if (!smc->dr_phb_enabled) {
+ return;
+ }
+
+ drc = spapr_drc_by_id(TYPE_SPAPR_DRC_PHB, sphb->index);
+ /* hotplug hooks should check it's enabled before getting this far */
+ assert(drc);
+
+ if (hotplugged) {
+ if (spapr->fdt_blob) {
+ /*
+ * SLOF might have pushed an updated FDT with new phandle values.
+ * Re-get the one of our interrupt controller.
+ */
+ nodename = spapr->irq->get_nodename(spapr);
+
+ offset = fdt_subnode_offset(spapr->fdt_blob, 0, nodename);
+ if (offset < 0) {
+ error_setg(errp, "Can't find node \"%s\": %s",
+ nodename, fdt_strerror(offset));
+ goto out;
+ }
+
+ phandle = fdt_get_phandle(spapr->fdt_blob, offset);
+ if (phandle < 0) {
+ error_setg(errp, "Can't get phandle of node \"%s\": %s",
+ nodename, fdt_strerror(offset));
+ goto out;
+ }
+ }
+ DEVICE_GET_CLASS(dev)->reset(dev);
+ }
+
+ /* For cold-plugged at initial boot and fallback for hotplug */
+ if (!phandle) {
+ phandle = PHANDLE_XICP;
+ }
+
+ fdt = create_device_tree(&fdt_size);
+ ret = spapr_populate_pci_dt(sphb, phandle, fdt, spapr->irq->nr_msis,
+ &fdt_start_offset);
+ if (ret < 0) {
+ error_setg(&local_err, "unable to create FDT for %sPHB",
+ dev->hotplugged ? "hotplugged " : "");
+ goto out;
+ }
+
+ if (hotplugged) {
+ /* generally SLOF creates these, for hotplug it's up to QEMU */
+ _FDT(fdt_setprop_string(fdt, fdt_start_offset, "name", "pci"));
+ }
+
+ spapr_drc_attach(drc, DEVICE(dev), fdt, fdt_start_offset, &local_err);
+
+out:
+ g_free(nodename);
+
+ if (local_err) {
+ error_propagate(errp, local_err);
+ g_free(fdt);
+ return;
+ }
+
+ if (hotplugged) {
+ spapr_hotplug_req_add_by_index(drc);
+ } else if (drc) {
+ spapr_drc_reset(drc);
+ }
+}
+
+void spapr_phb_release(DeviceState *dev)
+{
+ object_unparent(OBJECT(dev));
+}
+
+static void spapr_phb_unplug_request(HotplugHandler *hotplug_dev,
+ DeviceState *dev, Error **errp)
+{
+ sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(dev);
+ sPAPRDRConnector *drc;
+
+ drc = spapr_drc_by_id(TYPE_SPAPR_DRC_PHB, sphb->index);
+ assert(drc);
+
+ if (!spapr_drc_unplug_requested(drc)) {
+ spapr_drc_detach(drc);
+ spapr_hotplug_req_remove_by_index(drc);
+ }
+}
+
static void spapr_machine_device_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
@@ -3723,6 +3856,8 @@ static void spapr_machine_device_plug(HotplugHandler
*hotplug_dev,
spapr_memory_plug(hotplug_dev, dev, errp);
} else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_CPU_CORE)) {
spapr_core_plug(hotplug_dev, dev, errp);
+ } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE)) {
+ spapr_phb_plug(hotplug_dev, dev, errp);
}
}
@@ -3741,6 +3876,7 @@ static void
spapr_machine_device_unplug_request(HotplugHandler *hotplug_dev,
{
sPAPRMachineState *sms = SPAPR_MACHINE(OBJECT(hotplug_dev));
MachineClass *mc = MACHINE_GET_CLASS(sms);
+ sPAPRMachineClass *smc = SPAPR_MACHINE_CLASS(mc);
if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
if (spapr_ovec_test(sms->ov5_cas, OV5_HP_EVT)) {
@@ -3760,6 +3896,12 @@ static void
spapr_machine_device_unplug_request(HotplugHandler *hotplug_dev,
return;
}
spapr_core_unplug_request(hotplug_dev, dev, errp);
+ } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE)) {
+ if (!smc->dr_phb_enabled) {
+ error_setg(errp, "PHB hot unplug not supported on this machine");
+ return;
+ }
+ spapr_phb_unplug_request(hotplug_dev, dev, errp);
}
}
@@ -3770,6 +3912,8 @@ static void spapr_machine_device_pre_plug(HotplugHandler
*hotplug_dev,
spapr_memory_pre_plug(hotplug_dev, dev, errp);
} else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_CPU_CORE)) {
spapr_core_pre_plug(hotplug_dev, dev, errp);
+ } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE)) {
+ spapr_phb_pre_plug(hotplug_dev, dev, errp);
}
}
@@ -3777,7 +3921,8 @@ static HotplugHandler
*spapr_get_hotplug_handler(MachineState *machine,
DeviceState *dev)
{
if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM) ||
- object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_CPU_CORE)) {
+ object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_CPU_CORE) ||
+ object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE)) {
return HOTPLUG_HANDLER(machine);
}
return NULL;
diff --git a/hw/ppc/spapr_drc.c b/hw/ppc/spapr_drc.c
index 189ee681062a..7a2676716364 100644
--- a/hw/ppc/spapr_drc.c
+++ b/hw/ppc/spapr_drc.c
@@ -703,6 +703,7 @@ static void spapr_drc_phb_class_init(ObjectClass *k, void
*data)
drck->typeshift = SPAPR_DR_CONNECTOR_TYPE_SHIFT_PHB;
drck->typename = "PHB";
drck->drc_name_prefix = "PHB ";
+ drck->release = spapr_phb_release;
}
static const TypeInfo spapr_dr_connector_info = {
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 688cca83ef2f..5bc912aa0028 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -1627,21 +1627,7 @@ static void spapr_phb_realize(DeviceState *dev, Error
**errp)
return;
}
- if (sphb->index != (uint32_t)-1) {
- Error *local_err = NULL;
-
- smc->phb_placement(spapr, sphb->index,
- &sphb->buid, &sphb->io_win_addr,
- &sphb->mem_win_addr, &sphb->mem64_win_addr,
- windows_supported, sphb->dma_liobn, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- }
- } else {
- error_setg(errp, "\"index\" for PAPR PHB is mandatory");
- return;
- }
+ assert(sphb->index != (uint32_t)-1); /* checked in spapr_phb_pre_plug() */
if (sphb->mem64_win_size != 0) {
if (sphb->mem_win_size > SPAPR_PCI_MEM32_WIN_SIZE) {
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index e96deefa30de..eff479b0a019 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -764,6 +764,7 @@ int spapr_max_server_number(sPAPRMachineState *spapr);
/* CPU and LMB DRC release callbacks. */
void spapr_core_release(DeviceState *dev);
void spapr_lmb_release(DeviceState *dev);
+void spapr_phb_release(DeviceState *dev);
void spapr_rtc_read(sPAPRRTCState *rtc, struct tm *tm, uint32_t *ns);
int spapr_rtc_import_offset(sPAPRRTCState *rtc, int64_t legacy_offset);
