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[Qemu-devel] [PATCH 06/10] add check reset mechanism when hotplug vfio d
From: |
Cao jin |
Subject: |
[Qemu-devel] [PATCH 06/10] add check reset mechanism when hotplug vfio device |
Date: |
Wed, 17 Feb 2016 18:43:50 +0800 |
From: Chen Fan <address@hidden>
Since we support multi-function hotplug, the function 0 indicates
the closure of the slot, so we have the chance to do the check.
Signed-off-by: Chen Fan <address@hidden>
---
hw/pci/pci.c | 29 +++++++++++++++++++++++++++++
hw/vfio/pci.c | 19 +++++++++++++++++++
hw/vfio/pci.h | 2 ++
include/hw/pci/pci_bus.h | 5 +++++
4 files changed, 55 insertions(+)
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index d940f79..e41925e 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -82,6 +82,7 @@ static void pci_bus_realize(BusState *qbus, Error **errp)
PCIBus *bus = PCI_BUS(qbus);
vmstate_register(NULL, -1, &vmstate_pcibus, bus);
+ notifier_with_return_list_init(&bus->hotplug_notifiers);
}
static void pci_bus_unrealize(BusState *qbus, Error **errp)
@@ -1836,6 +1837,22 @@ PCIDevice *pci_find_device(PCIBus *bus, int bus_num,
uint8_t devfn)
return bus->devices[devfn];
}
+void pci_bus_add_hotplug_notifier(PCIBus *bus, NotifierWithReturn *notify)
+{
+ notifier_with_return_list_add(&bus->hotplug_notifiers, notify);
+}
+
+void pci_bus_remove_hotplug_notifier(NotifierWithReturn *notifier)
+{
+ notifier_with_return_remove(notifier);
+}
+
+static int pci_bus_hotplug_notifier(PCIBus *bus, void *opaque)
+{
+ return notifier_with_return_list_notify(&bus->hotplug_notifiers,
+ opaque);
+}
+
static void pci_qdev_realize(DeviceState *qdev, Error **errp)
{
PCIDevice *pci_dev = (PCIDevice *)qdev;
@@ -1878,6 +1895,18 @@ static void pci_qdev_realize(DeviceState *qdev, Error
**errp)
pci_qdev_unrealize(DEVICE(pci_dev), NULL);
return;
}
+
+ /*
+ * If the function is func 0, indicate the closure of the slot.
+ * signal the callback.
+ */
+ if (DEVICE(pci_dev)->hotplugged &&
+ pci_get_function_0(pci_dev) == pci_dev &&
+ pci_bus_hotplug_notifier(bus, pci_dev)) {
+ error_setg(errp, "failed to hotplug function 0");
+ pci_qdev_unrealize(DEVICE(pci_dev), NULL);
+ return;
+ }
}
static void pci_default_realize(PCIDevice *dev, Error **errp)
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 54032d0..b900f70 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -2076,6 +2076,19 @@ static int vfio_check_devices_host_bus_reset(void)
return 0;
}
+static int vfio_check_bus_reset(NotifierWithReturn *n, void *opaque)
+{
+ VFIOPCIDevice *vdev = container_of(n, VFIOPCIDevice, hotplug_notifier);
+ PCIDevice *pci_dev = PCI_DEVICE(vdev);
+ PCIDevice *pci_func0 = opaque;
+
+ if (pci_get_function_0(pci_dev) != pci_func0) {
+ return 0;
+ }
+
+ return vfio_check_host_bus_reset(vdev);
+}
+
static int vfio_setup_aer(VFIOPCIDevice *vdev, uint8_t cap_ver,
int pos, uint16_t size)
{
@@ -2123,6 +2136,9 @@ static int vfio_setup_aer(VFIOPCIDevice *vdev, uint8_t
cap_ver,
pdev->exp.aer_log.log_max = 0;
}
+ vdev->hotplug_notifier.notify = vfio_check_bus_reset;
+ pci_bus_add_hotplug_notifier(pdev->bus, &vdev->hotplug_notifier);
+
pcie_cap_deverr_init(pdev);
return pcie_aer_init(pdev, pos, size);
@@ -3006,6 +3022,9 @@ static void vfio_exitfn(PCIDevice *pdev)
vfio_unregister_req_notifier(vdev);
vfio_unregister_err_notifier(vdev);
pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
+ if (vdev->features & VFIO_FEATURE_ENABLE_AER) {
+ pci_bus_remove_hotplug_notifier(&vdev->hotplug_notifier);
+ }
vfio_disable_interrupts(vdev);
if (vdev->intx.mmap_timer) {
timer_free(vdev->intx.mmap_timer);
diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
index aff46c2..bf9e93c 100644
--- a/hw/vfio/pci.h
+++ b/hw/vfio/pci.h
@@ -143,6 +143,8 @@ typedef struct VFIOPCIDevice {
bool no_kvm_intx;
bool no_kvm_msi;
bool no_kvm_msix;
+
+ NotifierWithReturn hotplug_notifier;
} VFIOPCIDevice;
uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len);
diff --git a/include/hw/pci/pci_bus.h b/include/hw/pci/pci_bus.h
index 403fec6..7812fa9 100644
--- a/include/hw/pci/pci_bus.h
+++ b/include/hw/pci/pci_bus.h
@@ -39,8 +39,13 @@ struct PCIBus {
Keep a count of the number of devices with raised IRQs. */
int nirq;
int *irq_count;
+
+ NotifierWithReturnList hotplug_notifiers;
};
+void pci_bus_add_hotplug_notifier(PCIBus *bus, NotifierWithReturn *notify);
+void pci_bus_remove_hotplug_notifier(NotifierWithReturn *notify);
+
typedef struct PCIBridgeWindows PCIBridgeWindows;
/*
--
1.9.3
- [Qemu-devel] [PATCH 00/10] vfio-pci: pass the aer error to guest, part2, Cao jin, 2016/02/17
- [Qemu-devel] [PATCH 01/10] vfio: extract vfio_get_hot_reset_info as a single function, Cao jin, 2016/02/17
- [Qemu-devel] [PATCH 02/10] vfio: squeeze out vfio_pci_do_hot_reset for support bus reset, Cao jin, 2016/02/17
- [Qemu-devel] [PATCH 03/10] vfio: add pcie extended capability support, Cao jin, 2016/02/17
- [Qemu-devel] [PATCH 04/10] vfio: add aer support for vfio device, Cao jin, 2016/02/17
- [Qemu-devel] [PATCH 05/10] vfio: add check host bus reset is support or not, Cao jin, 2016/02/17
- [Qemu-devel] [PATCH 06/10] add check reset mechanism when hotplug vfio device,
Cao jin <=
- [Qemu-devel] [PATCH 08/10] vfio: introduce last reset sequence id, Cao jin, 2016/02/17
- [Qemu-devel] [PATCH 07/10] pci: introduce pci bus pre reset, Cao jin, 2016/02/17
- [Qemu-devel] [PATCH 09/10] vfio-pci: pass the aer error to guest, Cao jin, 2016/02/17