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charset="utf-8" QEMU will notify the OS about PCI hotplug/hotunplug events through GED interrupts. Let the GED device handle a new PCI hotplug event. On its occurrence it calls the \\_SB.PCI0.PCNT method with the BLCK mutex held. The GED device uses a dedicated MMIO region that will be mapped by the machine code. At this point the GED still does not support PCI device hotplug in its TYPE_HOTPLUG_HANDLER implementation. This will come in a subsequent patch. Signed-off-by: Eric Auger --- v3 -> v4: - add qbus_set_hotplug_handler - root bus is not passed in acpi_pcihp_init arg v2 -> v3: - pcihp_init and reset are put in ged code instead of machine code (Igor) - Add ACPI_GED_PCI_HOTPLUG_EVT event depending on use_acpi_hotplug_bridge (Igor) v1 -> v2: - Introduce ACPI_PCIHP_REGION_NAME --- include/hw/acpi/generic_event_device.h | 4 ++++ hw/acpi/generic_event_device.c | 31 ++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/include/hw/acpi/generic_event_device.h b/include/hw/acpi/gener= ic_event_device.h index f5ffa67a39..ec8e1abe0a 100644 --- a/include/hw/acpi/generic_event_device.h +++ b/include/hw/acpi/generic_event_device.h @@ -102,6 +102,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(AcpiGedState, ACPI_GED) #define ACPI_GED_PWR_DOWN_EVT 0x2 #define ACPI_GED_NVDIMM_HOTPLUG_EVT 0x4 #define ACPI_GED_CPU_HOTPLUG_EVT 0x8 +#define ACPI_GED_PCI_HOTPLUG_EVT 0x10 =20 typedef struct GEDState { MemoryRegion evt; @@ -109,6 +110,8 @@ typedef struct GEDState { uint32_t sel; } GEDState; =20 +#define ACPI_PCIHP_REGION_NAME "pcihp container" + struct AcpiGedState { SysBusDevice parent_obj; MemHotplugState memhp_state; @@ -116,6 +119,7 @@ struct AcpiGedState { CPUHotplugState cpuhp_state; MemoryRegion container_cpuhp; AcpiPciHpState pcihp_state; + MemoryRegion container_pcihp; GEDState ged_state; uint32_t ged_event_bitmap; qemu_irq irq; diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c index 92b931758f..fc84bfb34e 100644 --- a/hw/acpi/generic_event_device.c +++ b/hw/acpi/generic_event_device.c @@ -12,6 +12,7 @@ #include "qemu/osdep.h" #include "qapi/error.h" #include "hw/acpi/acpi.h" +#include "hw/acpi/pcihp.h" #include "hw/acpi/generic_event_device.h" #include "hw/pci/pci.h" #include "hw/irq.h" @@ -28,6 +29,7 @@ static const uint32_t ged_supported_events[] =3D { ACPI_GED_PWR_DOWN_EVT, ACPI_GED_NVDIMM_HOTPLUG_EVT, ACPI_GED_CPU_HOTPLUG_EVT, + ACPI_GED_PCI_HOTPLUG_EVT, }; =20 /* @@ -123,6 +125,12 @@ void build_ged_aml(Aml *table, const char *name, Hotpl= ugHandler *hotplug_dev, aml_notify(aml_name("\\_SB.NVDR"), aml_int(0x80))); break; + case ACPI_GED_PCI_HOTPLUG_EVT: + aml_append(if_ctx, + aml_acquire(aml_name("\\_SB.PCI0.BLCK"), 0xFFFF= )); + aml_append(if_ctx, aml_call0("\\_SB.PCI0.PCNT")); + aml_append(if_ctx, aml_release(aml_name("\\_SB.PCI0.BLCK")= )); + break; default: /* * Please make sure all the events in ged_supported_events= [] @@ -316,6 +324,8 @@ static void acpi_ged_send_event(AcpiDeviceIf *adev, Acp= iEventStatusBits ev) sel =3D ACPI_GED_NVDIMM_HOTPLUG_EVT; } else if (ev & ACPI_CPU_HOTPLUG_STATUS) { sel =3D ACPI_GED_CPU_HOTPLUG_EVT; + } else if (ev & ACPI_PCI_HOTPLUG_STATUS) { + sel =3D ACPI_GED_PCI_HOTPLUG_EVT; } else { /* Unknown event. Return without generating interrupt. */ warn_report("GED: Unsupported event %d. No irq injected", ev); @@ -427,9 +437,13 @@ static void acpi_ged_realize(DeviceState *dev, Error *= *errp) { SysBusDevice *sbd =3D SYS_BUS_DEVICE(dev); AcpiGedState *s =3D ACPI_GED(dev); + AcpiPciHpState *pcihp_state =3D &s->pcihp_state; uint32_t ged_events; int i; =20 + if (pcihp_state->use_acpi_hotplug_bridge) { + s->ged_event_bitmap |=3D ACPI_GED_PCI_HOTPLUG_EVT; + } ged_events =3D ctpop32(s->ged_event_bitmap); =20 for (i =3D 0; i < ARRAY_SIZE(ged_supported_events) && ged_events; i++)= { @@ -449,6 +463,13 @@ static void acpi_ged_realize(DeviceState *dev, Error *= *errp) cpu_hotplug_hw_init(&s->container_cpuhp, OBJECT(dev), &s->cpuhp_state, 0); break; + case ACPI_GED_PCI_HOTPLUG_EVT: + memory_region_init(&s->container_pcihp, OBJECT(dev), + ACPI_PCIHP_REGION_NAME, ACPI_PCIHP_SIZE); + sysbus_init_mmio(sbd, &s->container_pcihp); + acpi_pcihp_init(OBJECT(s), &s->pcihp_state, + &s->container_pcihp, 0); + qbus_set_hotplug_handler(BUS(s->pcihp_state.root), OBJECT(dev)= ); } ged_events--; } @@ -490,6 +511,15 @@ static void acpi_ged_initfn(Object *obj) sysbus_init_mmio(sbd, &ged_st->regs); } =20 +static void ged_reset(DeviceState *dev) +{ + AcpiGedState *s =3D ACPI_GED(dev); + + if (s->pcihp_state.use_acpi_hotplug_bridge) { + acpi_pcihp_reset(&s->pcihp_state); + } +} + static void acpi_ged_class_init(ObjectClass *class, const void *data) { DeviceClass *dc =3D DEVICE_CLASS(class); @@ -505,6 +535,7 @@ static void acpi_ged_class_init(ObjectClass *class, con= st void *data) hc->plug =3D acpi_ged_device_plug_cb; hc->unplug_request =3D acpi_ged_unplug_request_cb; hc->unplug =3D acpi_ged_unplug_cb; + device_class_set_legacy_reset(dc, ged_reset); =20 adevc->ospm_status =3D acpi_ged_ospm_status; adevc->send_event =3D acpi_ged_send_event; --=20 2.49.0