pci: allow hotplug removal of cold-plugged devices
This patch fixes hot unplug of cold plugged devices
(those present at system start), which got broken by
5beb8ad503
.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Cam Macdonell <cam@cs.ualberta.ca>
Tested-by: Cam Macdonell <cam@cs.ualberta.ca>
Reported-by: Cam Macdonell <cam@cs.ualberta.ca>.
This commit is contained in:
parent
7f5feab4dd
commit
e927d48722
@ -585,7 +585,8 @@ static void pciej_write(void *opaque, uint32_t addr, uint32_t val)
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PIIX4_DPRINTF("pciej write %x <== %d\n", addr, val);
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}
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static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev, int state);
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static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
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PCIHotplugState state);
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static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s)
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{
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@ -615,18 +616,23 @@ static void disable_device(PIIX4PMState *s, int slot)
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s->pci0_status.down |= (1 << slot);
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}
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static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev, int state)
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static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
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PCIHotplugState state)
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{
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int slot = PCI_SLOT(dev->devfn);
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PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev,
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DO_UPCAST(PCIDevice, qdev, qdev));
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if (!dev->qdev.hotplugged)
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/* Don't send event when device is enabled during qemu machine creation:
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* it is present on boot, no hotplug event is necessary. We do send an
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* event when the device is disabled later. */
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if (state == PCI_COLDPLUG_ENABLED) {
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return 0;
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}
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s->pci0_status.up = 0;
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s->pci0_status.down = 0;
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if (state) {
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if (state == PCI_HOTPLUG_ENABLED) {
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enable_device(s, slot);
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} else {
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disable_device(s, slot);
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10
hw/pci.c
10
hw/pci.c
@ -1558,8 +1558,11 @@ static int pci_qdev_init(DeviceState *qdev, DeviceInfo *base)
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pci_add_option_rom(pci_dev);
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if (bus->hotplug) {
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/* lower layer must check qdev->hotplugged */
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rc = bus->hotplug(bus->hotplug_qdev, pci_dev, 1);
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/* Let buses differentiate between hotplug and when device is
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* enabled during qemu machine creation. */
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rc = bus->hotplug(bus->hotplug_qdev, pci_dev,
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qdev->hotplugged ? PCI_HOTPLUG_ENABLED:
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PCI_COLDPLUG_ENABLED);
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if (rc != 0) {
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int r = pci_unregister_device(&pci_dev->qdev);
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assert(!r);
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@ -1573,7 +1576,8 @@ static int pci_unplug_device(DeviceState *qdev)
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{
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PCIDevice *dev = DO_UPCAST(PCIDevice, qdev, qdev);
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return dev->bus->hotplug(dev->bus->hotplug_qdev, dev, 0);
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return dev->bus->hotplug(dev->bus->hotplug_qdev, dev,
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PCI_HOTPLUG_DISABLED);
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}
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void pci_qdev_register(PCIDeviceInfo *info)
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10
hw/pci.h
10
hw/pci.h
@ -214,7 +214,15 @@ int pci_device_load(PCIDevice *s, QEMUFile *f);
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typedef void (*pci_set_irq_fn)(void *opaque, int irq_num, int level);
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typedef int (*pci_map_irq_fn)(PCIDevice *pci_dev, int irq_num);
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typedef int (*pci_hotplug_fn)(DeviceState *qdev, PCIDevice *pci_dev, int state);
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typedef enum {
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PCI_HOTPLUG_DISABLED,
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PCI_HOTPLUG_ENABLED,
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PCI_COLDPLUG_ENABLED,
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} PCIHotplugState;
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typedef int (*pci_hotplug_fn)(DeviceState *qdev, PCIDevice *pci_dev,
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PCIHotplugState state);
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void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
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const char *name, int devfn_min);
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PCIBus *pci_bus_new(DeviceState *parent, const char *name, int devfn_min);
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10
hw/pcie.c
10
hw/pcie.c
@ -192,14 +192,16 @@ static void pcie_cap_slot_event(PCIDevice *dev, PCIExpressHotPlugEvent event)
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}
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static int pcie_cap_slot_hotplug(DeviceState *qdev,
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PCIDevice *pci_dev, int state)
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PCIDevice *pci_dev, PCIHotplugState state)
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{
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PCIDevice *d = DO_UPCAST(PCIDevice, qdev, qdev);
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uint8_t *exp_cap = d->config + d->exp.exp_cap;
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uint16_t sltsta = pci_get_word(exp_cap + PCI_EXP_SLTSTA);
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if (!pci_dev->qdev.hotplugged) {
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assert(state); /* this case only happens at machine creation. */
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/* Don't send event when device is enabled during qemu machine creation:
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* it is present on boot, no hotplug event is necessary. We do send an
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* event when the device is disabled later. */
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if (state == PCI_COLDPLUG_ENABLED) {
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pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTSTA,
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PCI_EXP_SLTSTA_PDS);
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return 0;
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@ -219,7 +221,7 @@ static int pcie_cap_slot_hotplug(DeviceState *qdev,
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*/
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assert(PCI_FUNC(pci_dev->devfn) == 0);
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if (state) {
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if (state == PCI_HOTPLUG_ENABLED) {
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pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTSTA,
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PCI_EXP_SLTSTA_PDS);
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pcie_cap_slot_event(d, PCI_EXP_HP_EV_PDC);
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