In case user regret when hot-add multi-function, we should roll back,
device_del the function added but still not worked.
Signed-off-by: Cao jin <caoj.f...@cn.fujitsu.com>
---
hw/pci/pcie.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c
index 89bf61b..497f390 100644
--- a/hw/pci/pcie.c
+++ b/hw/pci/pcie.c
@@ -265,9 +265,27 @@ void pcie_cap_slot_hot_unplug_request_cb(HotplugHandler
*hotplug_dev,
DeviceState *dev, Error **errp)
{
uint8_t *exp_cap;
+ PCIDevice *pci_dev = PCI_DEVICE(dev);
+ PCIBus *bus = pci_dev->bus;
pcie_cap_slot_hotplug_common(PCI_DEVICE(hotplug_dev), dev, &exp_cap, errp);
+ /* handle the condition: user hot-add multi function, but regret before
+ * finish it, and want to delete the added but not worked function. Fake
+ * the condition: the slot is polulated, power indicator is off and power
+ * controller is off, so device can be detached when OS write config space.
+ */
+ if (PCI_FUNC(pci_dev->devfn) > 0 &&
+ bus->devices[PCI_DEVFN(0, 0)] == NULL) {
+ pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTSTA,
+ PCI_EXP_SLTSTA_PDS);
+
+ pcie_cap_slot_event(PCI_DEVICE(hotplug_dev),
+ PCI_EXP_HP_EV_PDC | PCI_EXP_HP_EV_ABP);
+
+ return;
+ }
+
pcie_cap_slot_push_attention_button(PCI_DEVICE(hotplug_dev));
}
--
2.1.0
