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[Qemu-devel] [RFC v8.1 08/13] pci: add bus reset_notifiers callbacks for
From: |
Chen Fan |
Subject: |
[Qemu-devel] [RFC v8.1 08/13] pci: add bus reset_notifiers callbacks for host bus reset |
Date: |
Wed, 27 May 2015 10:46:29 +0800 |
Particularly, For vfio devices, Once need to recovery devices
by bus reset such as AER, we always need to reset the host bus
to recovery the devices under the bus, so we need to add pci bus
callbacks to specify to do host bus reset.
Signed-off-by: Chen Fan <address@hidden>
---
hw/pci/pci.c | 16 ++++++++++++++++
hw/pci/pci_bridge.c | 5 +++++
include/hw/pci/pci.h | 4 ++++
include/hw/pci/pci_bus.h | 2 ++
4 files changed, 27 insertions(+)
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 48f19a3..0878834 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -74,11 +74,27 @@ static const VMStateDescription vmstate_pcibus = {
}
};
+void pci_bus_add_reset_notifier(PCIBus *bus, Notifier *notify)
+{
+ notifier_list_add(&bus->reset_notifiers, notify);
+}
+
+void pci_bus_remove_reset_notifier(Notifier *notify)
+{
+ notifier_remove(notify);
+}
+
+void pci_bus_run_reset_notifier(PCIBus *bus, void *opaque)
+{
+ notifier_list_notify(&bus->reset_notifiers, opaque);
+}
+
static void pci_bus_realize(BusState *qbus, Error **errp)
{
PCIBus *bus = PCI_BUS(qbus);
vmstate_register(NULL, -1, &vmstate_pcibus, bus);
+ notifier_list_init(&bus->reset_notifiers);
}
static void pci_bus_unrealize(BusState *qbus, Error **errp)
diff --git a/hw/pci/pci_bridge.c b/hw/pci/pci_bridge.c
index 40c97b1..75d2b4b 100644
--- a/hw/pci/pci_bridge.c
+++ b/hw/pci/pci_bridge.c
@@ -267,6 +267,11 @@ void pci_bridge_write_config(PCIDevice *d,
newctl = pci_get_word(d->config + PCI_BRIDGE_CONTROL);
if (~oldctl & newctl & PCI_BRIDGE_CTL_BUS_RESET) {
+ /*
+ * Notify all vfio-pci devices under the bus
+ * to do physical bus reset.
+ */
+ pci_for_each_bus(&s->sec_bus, pci_bus_run_reset_notifier, NULL);
/* Trigger hot reset on 0->1 transition. */
qbus_reset_all(&s->sec_bus.qbus);
}
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 5d050c8..5a9357c 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -7,6 +7,7 @@
#include "exec/memory.h"
#include "sysemu/dma.h"
#include "qapi/error.h"
+#include "qemu/notify.h"
/* PCI includes legacy ISA access. */
#include "hw/isa/isa.h"
@@ -371,6 +372,9 @@ void pci_bus_fire_intx_routing_notifier(PCIBus *bus);
void pci_device_set_intx_routing_notifier(PCIDevice *dev,
PCIINTxRoutingNotifier notifier);
void pci_device_reset(PCIDevice *dev);
+void pci_bus_add_reset_notifier(PCIBus *bus, Notifier *notify);
+void pci_bus_remove_reset_notifier(Notifier *notify);
+void pci_bus_run_reset_notifier(PCIBus *bus, void *opaque);
PCIDevice *pci_nic_init_nofail(NICInfo *nd, PCIBus *rootbus,
const char *default_model,
diff --git a/include/hw/pci/pci_bus.h b/include/hw/pci/pci_bus.h
index fabaeee..3b551d7 100644
--- a/include/hw/pci/pci_bus.h
+++ b/include/hw/pci/pci_bus.h
@@ -29,6 +29,8 @@ struct PCIBus {
Keep a count of the number of devices with raised IRQs. */
int nirq;
int *irq_count;
+
+ NotifierList reset_notifiers;
};
typedef struct PCIBridgeWindows PCIBridgeWindows;
--
1.9.3
- Re: [Qemu-devel] [RFC v8.1 03/13] vfio: add pcie extanded capability support, (continued)
- [Qemu-devel] [RFC v8.1 01/13] vfio: extract vfio_get_hot_reset_info as a single function, Chen Fan, 2015/05/26
- [Qemu-devel] [RFC v8.1 04/13] aer: impove pcie_aer_init to support vfio device, Chen Fan, 2015/05/26
- [Qemu-devel] [RFC v8.1 05/13] vfio: add aer support for vfio device, Chen Fan, 2015/05/26
- [Qemu-devel] [RFC v8.1 06/13] vfio: add check host bus reset is support or not, Chen Fan, 2015/05/26
- [Qemu-devel] [RFC v8.1 07/13] vfio: add check for vfio devices which enable aer should support bus reset, Chen Fan, 2015/05/26
- [Qemu-devel] [RFC v8.1 08/13] pci: add bus reset_notifiers callbacks for host bus reset,
Chen Fan <=
- [Qemu-devel] [RFC v8.1 09/13] vfio: add sec_bus_reset notifier to notify physical bus reset is needed, Chen Fan, 2015/05/26
- [Qemu-devel] [RFC v8.1 10/13] vfio: do hot bus reset when do virtual secondary bus reset, Chen Fan, 2015/05/26
- [Qemu-devel] [RFC v8.1 11/13] pcie_aer: expose pcie_aer_msg() interface, Chen Fan, 2015/05/26
- [Qemu-devel] [RFC v8.1 12/13] vfio-pci: pass the aer error to guest, Chen Fan, 2015/05/26
- [Qemu-devel] [RFC v8.1 13/13] vfio: add 'aer' property to expose aercap, Chen Fan, 2015/05/26