diff options
author | Marcel Apfelbaum <marcel@redhat.com> | 2016-06-27 18:38:32 +0300 |
---|---|---|
committer | Michael S. Tsirkin <mst@redhat.com> | 2016-07-04 14:50:01 +0300 |
commit | b86eacb804bdb92acc48cab8cd2a465714a829ab (patch) | |
tree | abbd4f799a09a988cc9554a69c511cc5d4132548 /hw | |
parent | 1b04cc801adff9ddf5aca9afe0e19df54290ca2c (diff) |
hw/pci: delay bus_master_enable_region initialization
Skip bus_master_enable region creation on PCI device init
in order to be sure the IOMMU device (if present) would
be created in advance. Add this memory region at machine_done time.
Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/pci/pci.c | 41 |
1 files changed, 32 insertions, 9 deletions
diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 4b585f47b6..ee385eba91 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -78,10 +78,37 @@ static const VMStateDescription vmstate_pcibus = { } }; +static void pci_init_bus_master(PCIDevice *pci_dev) +{ + AddressSpace *dma_as = pci_device_iommu_address_space(pci_dev); + + memory_region_init_alias(&pci_dev->bus_master_enable_region, + OBJECT(pci_dev), "bus master", + dma_as->root, 0, memory_region_size(dma_as->root)); + memory_region_set_enabled(&pci_dev->bus_master_enable_region, false); + address_space_init(&pci_dev->bus_master_as, + &pci_dev->bus_master_enable_region, pci_dev->name); +} + +static void pcibus_machine_done(Notifier *notifier, void *data) +{ + PCIBus *bus = container_of(notifier, PCIBus, machine_done); + int i; + + for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { + if (bus->devices[i]) { + pci_init_bus_master(bus->devices[i]); + } + } +} + static void pci_bus_realize(BusState *qbus, Error **errp) { PCIBus *bus = PCI_BUS(qbus); + bus->machine_done.notify = pcibus_machine_done; + qemu_add_machine_init_done_notifier(&bus->machine_done); + vmstate_register(NULL, -1, &vmstate_pcibus, bus); } @@ -89,6 +116,8 @@ static void pci_bus_unrealize(BusState *qbus, Error **errp) { PCIBus *bus = PCI_BUS(qbus); + qemu_remove_machine_init_done_notifier(&bus->machine_done); + vmstate_unregister(NULL, &vmstate_pcibus, bus); } @@ -920,7 +949,6 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus, PCIConfigReadFunc *config_read = pc->config_read; PCIConfigWriteFunc *config_write = pc->config_write; Error *local_err = NULL; - AddressSpace *dma_as; DeviceState *dev = DEVICE(pci_dev); pci_dev->bus = bus; @@ -961,15 +989,10 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus, pci_dev->devfn = devfn; pci_dev->requester_id_cache = pci_req_id_cache_get(pci_dev); - dma_as = pci_device_iommu_address_space(pci_dev); - - memory_region_init_alias(&pci_dev->bus_master_enable_region, - OBJECT(pci_dev), "bus master", - dma_as->root, 0, memory_region_size(dma_as->root)); - memory_region_set_enabled(&pci_dev->bus_master_enable_region, false); - address_space_init(&pci_dev->bus_master_as, &pci_dev->bus_master_enable_region, - name); + if (qdev_hotplug) { + pci_init_bus_master(pci_dev); + } pstrcpy(pci_dev->name, sizeof(pci_dev->name), name); pci_dev->irq_state = 0; pci_config_alloc(pci_dev); |