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* QEMU PCI hotplug support
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* Copyright (c) 2004 Fabrice Bellard
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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#include "block_int.h"
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#include "virtio-blk.h"
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#if defined(TARGET_I386) || defined(TARGET_X86_64)
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static PCIDevice *qemu_pci_hot_add_nic(PCIBus *pci_bus, const char *opts)
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ret = net_client_init ("nic", opts);
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if (ret < 0 || !nd_table[ret].model)
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return pci_nic_init (pci_bus, &nd_table[ret], -1, "rtl8139");
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void drive_hot_add(const char *pci_addr, const char *opts)
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int drive_idx, type, bus;
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if (pci_read_devaddr(pci_addr, &dom, &pci_bus, &slot)) {
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term_printf("Invalid pci address\n");
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dev = pci_find_device(pci_bus, slot, 0);
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term_printf("no pci device with address %s\n", pci_addr);
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drive_idx = add_init_drive(opts);
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type = drives_table[drive_idx].type;
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bus = drive_get_max_bus (type);
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lsi_scsi_attach (dev, drives_table[drive_idx].bdrv,
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drives_table[drive_idx].unit);
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term_printf("Can't hot-add drive to type %d\n", type);
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term_printf("OK bus %d, unit %d\n", drives_table[drive_idx].bus,
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drives_table[drive_idx].unit);
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static PCIDevice *qemu_pci_hot_add_storage(PCIBus *pci_bus, const char *opts)
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int type = -1, drive_idx = -1;
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if (get_param_value(buf, sizeof(buf), "if", opts)) {
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if (!strcmp(buf, "scsi"))
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else if (!strcmp(buf, "virtio")) {
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term_printf("no if= specified\n");
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if (get_param_value(buf, sizeof(buf), "file", opts)) {
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drive_idx = add_init_drive(opts);
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} else if (type == IF_VIRTIO) {
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term_printf("virtio requires a backing file/device.\n");
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opaque = lsi_scsi_init (pci_bus, -1);
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if (opaque && drive_idx >= 0)
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lsi_scsi_attach (opaque, drives_table[drive_idx].bdrv,
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drives_table[drive_idx].unit);
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opaque = virtio_blk_init (pci_bus, drives_table[drive_idx].bdrv);
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term_printf ("type %s not a hotpluggable PCI device.\n", buf);
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void pci_device_hot_add(const char *pci_addr, const char *type, const char *opts)
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PCIDevice *dev = NULL;
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if (pci_assign_devaddr(pci_addr, &dom, &bus, &slot)) {
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term_printf("Invalid pci address\n");
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pci_bus = pci_find_bus(bus);
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term_printf("Can't find pci_bus %d\n", bus);
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if (strcmp(type, "nic") == 0)
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dev = qemu_pci_hot_add_nic(pci_bus, opts);
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else if (strcmp(type, "storage") == 0)
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dev = qemu_pci_hot_add_storage(pci_bus, opts);
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term_printf("invalid type: %s\n", type);
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qemu_system_device_hot_add(bus, PCI_SLOT(dev->devfn), 1);
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term_printf("OK domain %d, bus %d, slot %d, function %d\n",
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0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
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PCI_FUNC(dev->devfn));
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term_printf("failed to add %s\n", opts);
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void pci_device_hot_remove(const char *pci_addr)
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if (pci_read_devaddr(pci_addr, &dom, &bus, &slot)) {
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term_printf("Invalid pci address\n");
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d = pci_find_device(bus, slot, 0);
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term_printf("slot %d empty\n", slot);
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qemu_system_device_hot_add(bus, slot, 0);
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static int pci_match_fn(void *dev_private, void *arg)
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PCIDevice *dev = dev_private;
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PCIDevice *match = arg;
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return (dev == match);
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* OS has executed _EJ0 method, we now can remove the device
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void pci_device_hot_remove_success(int pcibus, int slot)
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PCIDevice *d = pci_find_device(pcibus, slot, 0);
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term_printf("invalid slot %d\n", slot);
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class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
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case PCI_BASE_CLASS_STORAGE:
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destroy_bdrvs(pci_match_fn, d);
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case PCI_BASE_CLASS_NETWORK:
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destroy_nic(pci_match_fn, d);
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pci_unregister_device(d);