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pci/pcihp: perform check for bus capability in pre_plug handler

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Perform the check in the pre_plug handler. In addition, we need the
capability only if the device is actually hotplugged (and not created
during machine initialization). This is a preparation for coldplugging
pci devices via that hotplug handler.

Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
David Hildenbrand 2018-12-12 10:16:17 +01:00 committed by Michael S. Tsirkin
parent fa2a775117
commit ec266f4088
3 changed files with 31 additions and 8 deletions
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21
hw/acpi/pcihp.c
View File

@ -217,17 +217,24 @@ void acpi_pcihp_reset(AcpiPciHpState *s)
acpi_pcihp_update(s);
}
void acpi_pcihp_device_pre_plug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
/* Only hotplugged devices need the hotplug capability. */
if (dev->hotplugged &&
acpi_pcihp_get_bsel(pci_get_bus(PCI_DEVICE(dev))) < 0) {
error_setg(errp, "Unsupported bus. Bus doesn't have property '"
ACPI_PCIHP_PROP_BSEL "' set");
return;
}
}
void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
DeviceState *dev, Error **errp)
{
PCIDevice *pdev = PCI_DEVICE(dev);
int slot = PCI_SLOT(pdev->devfn);
int bsel = acpi_pcihp_get_bsel(pci_get_bus(pdev));
if (bsel < 0) {
error_setg(errp, "Unsupported bus. Bus doesn't have property '"
ACPI_PCIHP_PROP_BSEL "' set");
return;
}
int bsel;
/* Don't send event when device is enabled during qemu machine creation:
* it is present on boot, no hotplug event is necessary. We do send an
@ -236,6 +243,8 @@ void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
return;
}
bsel = acpi_pcihp_get_bsel(pci_get_bus(pdev));
g_assert(bsel >= 0);
s->acpi_pcihp_pci_status[bsel].up |= (1U << slot);
acpi_send_event(DEVICE(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS);
}

16
hw/acpi/piix4.c
View File

@ -371,6 +371,18 @@ static void piix4_pm_powerdown_req(Notifier *n, void *opaque)
acpi_pm1_evt_power_down(&s->ar);
}
static void piix4_device_pre_plug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
acpi_pcihp_device_pre_plug_cb(hotplug_dev, dev, errp);
} else if (!object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM) &&
!object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
error_setg(errp, "acpi: device pre plug request for not supported"
" device type: %s", object_get_typename(OBJECT(dev)));
}
}
static void piix4_device_plug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
@ -393,8 +405,7 @@ static void piix4_device_plug_cb(HotplugHandler *hotplug_dev,
acpi_cpu_plug_cb(hotplug_dev, &s->cpuhp_state, dev, errp);
}
} else {
error_setg(errp, "acpi: device plug request for not supported device"
" type: %s", object_get_typename(OBJECT(dev)));
g_assert_not_reached();
}
}
@ -703,6 +714,7 @@ static void piix4_pm_class_init(ObjectClass *klass, void *data)
*/
dc->user_creatable = false;
dc->hotpluggable = false;
hc->pre_plug = piix4_device_pre_plug_cb;
hc->plug = piix4_device_plug_cb;
hc->unplug_request = piix4_device_unplug_request_cb;
hc->unplug = piix4_device_unplug_cb;

2
include/hw/acpi/pcihp.h
View File

@ -56,6 +56,8 @@ typedef struct AcpiPciHpState {
void acpi_pcihp_init(Object *owner, AcpiPciHpState *, PCIBus *root,
MemoryRegion *address_space_io, bool bridges_enabled);
void acpi_pcihp_device_pre_plug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp);
void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
DeviceState *dev, Error **errp);
void acpi_pcihp_device_unplug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,