hw/remote/proxy.c - qemu - Git at Google

 /*
  * Copyright © 2018, 2021 Oracle and/or its affiliates.
  *
  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  * See the COPYING file in the top-level directory.
  *
  */

 #include "qemu/osdep.h"

 #include "hw/remote/proxy.h"
 #include "hw/pci/pci.h"
 #include "qapi/error.h"
 #include "io/channel-util.h"
 #include "hw/qdev-properties.h"
 #include "monitor/monitor.h"
 #include "migration/blocker.h"
 #include "qemu/sockets.h"
 #include "hw/remote/mpqemu-link.h"
 #include "qemu/error-report.h"
 #include "hw/remote/proxy-memory-listener.h"
 #include "qom/object.h"
 #include "qemu/event_notifier.h"
 #include "sysemu/kvm.h"

 static void probe_pci_info(PCIDevice *dev, Error **errp);
 static void proxy_device_reset(DeviceState *dev);

 static void proxy_intx_update(PCIDevice *pci_dev)
 {
     PCIProxyDev *dev = PCI_PROXY_DEV(pci_dev);
     PCIINTxRoute route;
     int pin = pci_get_byte(pci_dev->config + PCI_INTERRUPT_PIN) - 1;

     if (dev->virq != -1) {
         kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, &dev->intr, dev->virq);
         dev->virq = -1;
     }

     route = pci_device_route_intx_to_irq(pci_dev, pin);

     dev->virq = route.irq;

     if (dev->virq != -1) {
         kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, &dev->intr,
                                            &dev->resample, dev->virq);
     }
 }

 static void setup_irqfd(PCIProxyDev *dev)
 {
     PCIDevice *pci_dev = PCI_DEVICE(dev);
     MPQemuMsg msg;
     Error *local_err = NULL;

     event_notifier_init(&dev->intr, 0);
     event_notifier_init(&dev->resample, 0);

     memset(&msg, 0, sizeof(MPQemuMsg));
     msg.cmd = MPQEMU_CMD_SET_IRQFD;
     msg.num_fds = 2;
     msg.fds[0] = event_notifier_get_fd(&dev->intr);
     msg.fds[1] = event_notifier_get_fd(&dev->resample);
     msg.size = 0;

     if (!mpqemu_msg_send(&msg, dev->ioc, &local_err)) {
         error_report_err(local_err);
     }

     dev->virq = -1;

     proxy_intx_update(pci_dev);

     pci_device_set_intx_routing_notifier(pci_dev, proxy_intx_update);
 }

 static void pci_proxy_dev_realize(PCIDevice *device, Error **errp)
 {
     ERRP_GUARD();
     PCIProxyDev *dev = PCI_PROXY_DEV(device);
     uint8_t *pci_conf = device->config;
     int fd;

     if (!dev->fd) {
         error_setg(errp, "fd parameter not specified for %s",
                    DEVICE(device)->id);
         return;
     }

     fd = monitor_fd_param(monitor_cur(), dev->fd, errp);
     if (fd == -1) {
         error_prepend(errp, "proxy: unable to parse fd %s: ", dev->fd);
         return;
     }

     if (!fd_is_socket(fd)) {
         error_setg(errp, "proxy: fd %d is not a socket", fd);
         close(fd);
         return;
     }

     dev->ioc = qio_channel_new_fd(fd, errp);
     if (!dev->ioc) {
         close(fd);
         return;
     }

     error_setg(&dev->migration_blocker, "%s does not support migration",
                TYPE_PCI_PROXY_DEV);
     if (migrate_add_blocker(dev->migration_blocker, errp) < 0) {
         error_free(dev->migration_blocker);
         object_unref(dev->ioc);
         return;
     }

     qemu_mutex_init(&dev->io_mutex);
     qio_channel_set_blocking(dev->ioc, true, NULL);

     pci_conf[PCI_LATENCY_TIMER] = 0xff;
     pci_conf[PCI_INTERRUPT_PIN] = 0x01;

     proxy_memory_listener_configure(&dev->proxy_listener, dev->ioc);

     setup_irqfd(dev);

     probe_pci_info(PCI_DEVICE(dev), errp);
 }

 static void pci_proxy_dev_exit(PCIDevice *pdev)
 {
     PCIProxyDev *dev = PCI_PROXY_DEV(pdev);

     if (dev->ioc) {
         qio_channel_close(dev->ioc, NULL);
     }

     migrate_del_blocker(dev->migration_blocker);

     error_free(dev->migration_blocker);

     proxy_memory_listener_deconfigure(&dev->proxy_listener);

     event_notifier_cleanup(&dev->intr);
     event_notifier_cleanup(&dev->resample);
 }

 static void config_op_send(PCIProxyDev *pdev, uint32_t addr, uint32_t *val,
                            int len, unsigned int op)
 {
     MPQemuMsg msg = { 0 };
     uint64_t ret = -EINVAL;
     Error *local_err = NULL;

     msg.cmd = op;
     msg.data.pci_conf_data.addr = addr;
     msg.data.pci_conf_data.val = (op == MPQEMU_CMD_PCI_CFGWRITE) ? *val : 0;
     msg.data.pci_conf_data.len = len;
     msg.size = sizeof(PciConfDataMsg);

     ret = mpqemu_msg_send_and_await_reply(&msg, pdev, &local_err);
     if (local_err) {
         error_report_err(local_err);
     }

     if (ret == UINT64_MAX) {
         error_report("Failed to perform PCI config %s operation",
                      (op == MPQEMU_CMD_PCI_CFGREAD) ? "READ" : "WRITE");
     }

     if (op == MPQEMU_CMD_PCI_CFGREAD) {
         *val = (uint32_t)ret;
     }
 }

 static uint32_t pci_proxy_read_config(PCIDevice *d, uint32_t addr, int len)
 {
     uint32_t val;

     config_op_send(PCI_PROXY_DEV(d), addr, &val, len, MPQEMU_CMD_PCI_CFGREAD);

     return val;
 }

 static void pci_proxy_write_config(PCIDevice *d, uint32_t addr, uint32_t val,
                                    int len)
 {
     /*
      * Some of the functions access the copy of remote device's PCI config
      * space which is cached in the proxy device. Therefore, maintain
      * it updated.
      */
     pci_default_write_config(d, addr, val, len);

     config_op_send(PCI_PROXY_DEV(d), addr, &val, len, MPQEMU_CMD_PCI_CFGWRITE);
 }

 static Property proxy_properties[] = {
     DEFINE_PROP_STRING("fd", PCIProxyDev, fd),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void pci_proxy_dev_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

     k->realize = pci_proxy_dev_realize;
     k->exit = pci_proxy_dev_exit;
     k->config_read = pci_proxy_read_config;
     k->config_write = pci_proxy_write_config;

     dc->reset = proxy_device_reset;

     device_class_set_props(dc, proxy_properties);
 }

 static const TypeInfo pci_proxy_dev_type_info = {
     .name          = TYPE_PCI_PROXY_DEV,
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCIProxyDev),
     .class_init    = pci_proxy_dev_class_init,
     .interfaces = (InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };

 static void pci_proxy_dev_register_types(void)
 {
     type_register_static(&pci_proxy_dev_type_info);
 }

 type_init(pci_proxy_dev_register_types)

 static void send_bar_access_msg(PCIProxyDev *pdev, MemoryRegion *mr,
                                 bool write, hwaddr addr, uint64_t *val,
                                 unsigned size, bool memory)
 {
     MPQemuMsg msg = { 0 };
     long ret = -EINVAL;
     Error *local_err = NULL;

     msg.size = sizeof(BarAccessMsg);
     msg.data.bar_access.addr = mr->addr + addr;
     msg.data.bar_access.size = size;
     msg.data.bar_access.memory = memory;

     if (write) {
         msg.cmd = MPQEMU_CMD_BAR_WRITE;
         msg.data.bar_access.val = *val;
     } else {
         msg.cmd = MPQEMU_CMD_BAR_READ;
     }

     ret = mpqemu_msg_send_and_await_reply(&msg, pdev, &local_err);
     if (local_err) {
         error_report_err(local_err);
     }

     if (!write) {
         *val = ret;
     }
 }

 static void proxy_bar_write(void *opaque, hwaddr addr, uint64_t val,
                             unsigned size)
 {
     ProxyMemoryRegion *pmr = opaque;

     send_bar_access_msg(pmr->dev, &pmr->mr, true, addr, &val, size,
                         pmr->memory);
 }

 static uint64_t proxy_bar_read(void *opaque, hwaddr addr, unsigned size)
 {
     ProxyMemoryRegion *pmr = opaque;
     uint64_t val;

     send_bar_access_msg(pmr->dev, &pmr->mr, false, addr, &val, size,
                         pmr->memory);

     return val;
 }

 const MemoryRegionOps proxy_mr_ops = {
     .read = proxy_bar_read,
     .write = proxy_bar_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .impl = {
         .min_access_size = 1,
         .max_access_size = 8,
     },
 };

 static void probe_pci_info(PCIDevice *dev, Error **errp)
 {
     PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
     uint32_t orig_val, new_val, base_class, val;
     PCIProxyDev *pdev = PCI_PROXY_DEV(dev);
     DeviceClass *dc = DEVICE_CLASS(pc);
     uint8_t type;
     int i, size;

     config_op_send(pdev, PCI_VENDOR_ID, &val, 2, MPQEMU_CMD_PCI_CFGREAD);
     pc->vendor_id = (uint16_t)val;

     config_op_send(pdev, PCI_DEVICE_ID, &val, 2, MPQEMU_CMD_PCI_CFGREAD);
     pc->device_id = (uint16_t)val;

     config_op_send(pdev, PCI_CLASS_DEVICE, &val, 2, MPQEMU_CMD_PCI_CFGREAD);
     pc->class_id = (uint16_t)val;

     config_op_send(pdev, PCI_SUBSYSTEM_ID, &val, 2, MPQEMU_CMD_PCI_CFGREAD);
     pc->subsystem_id = (uint16_t)val;

     base_class = pc->class_id >> 4;
     switch (base_class) {
     case PCI_BASE_CLASS_BRIDGE:
         set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
         break;
     case PCI_BASE_CLASS_STORAGE:
         set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
         break;
     case PCI_BASE_CLASS_NETWORK:
     case PCI_BASE_CLASS_WIRELESS:
         set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
         break;
     case PCI_BASE_CLASS_INPUT:
         set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
         break;
     case PCI_BASE_CLASS_DISPLAY:
         set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
         break;
     case PCI_BASE_CLASS_PROCESSOR:
         set_bit(DEVICE_CATEGORY_CPU, dc->categories);
         break;
     default:
         set_bit(DEVICE_CATEGORY_MISC, dc->categories);
         break;
     }

     for (i = 0; i < PCI_NUM_REGIONS; i++) {
         config_op_send(pdev, PCI_BASE_ADDRESS_0 + (4 * i), &orig_val, 4,
                        MPQEMU_CMD_PCI_CFGREAD);
         new_val = 0xffffffff;
         config_op_send(pdev, PCI_BASE_ADDRESS_0 + (4 * i), &new_val, 4,
                        MPQEMU_CMD_PCI_CFGWRITE);
         config_op_send(pdev, PCI_BASE_ADDRESS_0 + (4 * i), &new_val, 4,
                        MPQEMU_CMD_PCI_CFGREAD);
         size = (~(new_val & 0xFFFFFFF0)) + 1;
         config_op_send(pdev, PCI_BASE_ADDRESS_0 + (4 * i), &orig_val, 4,
                        MPQEMU_CMD_PCI_CFGWRITE);
         type = (new_val & 0x1) ?
                    PCI_BASE_ADDRESS_SPACE_IO : PCI_BASE_ADDRESS_SPACE_MEMORY;

         if (size) {
             g_autofree char *name = g_strdup_printf("bar-region-%d", i);
             pdev->region[i].dev = pdev;
             pdev->region[i].present = true;
             if (type == PCI_BASE_ADDRESS_SPACE_MEMORY) {
                 pdev->region[i].memory = true;
             }
             memory_region_init_io(&pdev->region[i].mr, OBJECT(pdev),
                                   &proxy_mr_ops, &pdev->region[i],
                                   name, size);
             pci_register_bar(dev, i, type, &pdev->region[i].mr);
         }
     }
 }

 static void proxy_device_reset(DeviceState *dev)
 {
     PCIProxyDev *pdev = PCI_PROXY_DEV(dev);
     MPQemuMsg msg = { 0 };
     Error *local_err = NULL;

     msg.cmd = MPQEMU_CMD_DEVICE_RESET;
     msg.size = 0;

     mpqemu_msg_send_and_await_reply(&msg, pdev, &local_err);
     if (local_err) {
         error_report_err(local_err);
     }

 }
	/*
	* Copyright © 2018, 2021 Oracle and/or its affiliates.
	*
	* This work is licensed under the terms of the GNU GPL, version 2 or later.
	* See the COPYING file in the top-level directory.
	*
	*/

	#include "qemu/osdep.h"

	#include "hw/remote/proxy.h"
	#include "hw/pci/pci.h"
	#include "qapi/error.h"
	#include "io/channel-util.h"
	#include "hw/qdev-properties.h"
	#include "monitor/monitor.h"
	#include "migration/blocker.h"
	#include "qemu/sockets.h"
	#include "hw/remote/mpqemu-link.h"
	#include "qemu/error-report.h"
	#include "hw/remote/proxy-memory-listener.h"
	#include "qom/object.h"
	#include "qemu/event_notifier.h"
	#include "sysemu/kvm.h"

	static void probe_pci_info(PCIDevice dev, Error *errp);
	static void proxy_device_reset(DeviceState *dev);

	static void proxy_intx_update(PCIDevice *pci_dev)
	{
	PCIProxyDev *dev = PCI_PROXY_DEV(pci_dev);
	PCIINTxRoute route;
	int pin = pci_get_byte(pci_dev->config + PCI_INTERRUPT_PIN) - 1;

	if (dev->virq != -1) {
	kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, &dev->intr, dev->virq);
	dev->virq = -1;
	}

	route = pci_device_route_intx_to_irq(pci_dev, pin);

	dev->virq = route.irq;

	if (dev->virq != -1) {
	kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, &dev->intr,
	&dev->resample, dev->virq);
	}
	}

	static void setup_irqfd(PCIProxyDev *dev)
	{
	PCIDevice *pci_dev = PCI_DEVICE(dev);
	MPQemuMsg msg;
	Error *local_err = NULL;

	event_notifier_init(&dev->intr, 0);
	event_notifier_init(&dev->resample, 0);

	memset(&msg, 0, sizeof(MPQemuMsg));
	msg.cmd = MPQEMU_CMD_SET_IRQFD;
	msg.num_fds = 2;
	msg.fds[0] = event_notifier_get_fd(&dev->intr);
	msg.fds[1] = event_notifier_get_fd(&dev->resample);
	msg.size = 0;

	if (!mpqemu_msg_send(&msg, dev->ioc, &local_err)) {
	error_report_err(local_err);
	}

	dev->virq = -1;

	proxy_intx_update(pci_dev);

	pci_device_set_intx_routing_notifier(pci_dev, proxy_intx_update);
	}

	static void pci_proxy_dev_realize(PCIDevice device, Error *errp)
	{
	ERRP_GUARD();
	PCIProxyDev *dev = PCI_PROXY_DEV(device);
	uint8_t *pci_conf = device->config;
	int fd;

	if (!dev->fd) {
	error_setg(errp, "fd parameter not specified for %s",
	DEVICE(device)->id);
	return;
	}

	fd = monitor_fd_param(monitor_cur(), dev->fd, errp);
	if (fd == -1) {
	error_prepend(errp, "proxy: unable to parse fd %s: ", dev->fd);
	return;
	}

	if (!fd_is_socket(fd)) {
	error_setg(errp, "proxy: fd %d is not a socket", fd);
	close(fd);
	return;
	}

	dev->ioc = qio_channel_new_fd(fd, errp);
	if (!dev->ioc) {
	close(fd);
	return;
	}

	error_setg(&dev->migration_blocker, "%s does not support migration",
	TYPE_PCI_PROXY_DEV);
	if (migrate_add_blocker(dev->migration_blocker, errp) < 0) {
	error_free(dev->migration_blocker);
	object_unref(dev->ioc);
	return;
	}

	qemu_mutex_init(&dev->io_mutex);
	qio_channel_set_blocking(dev->ioc, true, NULL);

	pci_conf[PCI_LATENCY_TIMER] = 0xff;
	pci_conf[PCI_INTERRUPT_PIN] = 0x01;

	proxy_memory_listener_configure(&dev->proxy_listener, dev->ioc);

	setup_irqfd(dev);

	probe_pci_info(PCI_DEVICE(dev), errp);
	}

	static void pci_proxy_dev_exit(PCIDevice *pdev)
	{
	PCIProxyDev *dev = PCI_PROXY_DEV(pdev);

	if (dev->ioc) {
	qio_channel_close(dev->ioc, NULL);
	}

	migrate_del_blocker(dev->migration_blocker);

	error_free(dev->migration_blocker);

	proxy_memory_listener_deconfigure(&dev->proxy_listener);

	event_notifier_cleanup(&dev->intr);
	event_notifier_cleanup(&dev->resample);
	}

	static void config_op_send(PCIProxyDev pdev, uint32_t addr, uint32_t val,
	int len, unsigned int op)
	{
	MPQemuMsg msg = { 0 };
	uint64_t ret = -EINVAL;
	Error *local_err = NULL;

	msg.cmd = op;
	msg.data.pci_conf_data.addr = addr;
	msg.data.pci_conf_data.val = (op == MPQEMU_CMD_PCI_CFGWRITE) ? *val : 0;
	msg.data.pci_conf_data.len = len;
	msg.size = sizeof(PciConfDataMsg);

	ret = mpqemu_msg_send_and_await_reply(&msg, pdev, &local_err);
	if (local_err) {
	error_report_err(local_err);
	}

	if (ret == UINT64_MAX) {
	error_report("Failed to perform PCI config %s operation",
	(op == MPQEMU_CMD_PCI_CFGREAD) ? "READ" : "WRITE");
	}

	if (op == MPQEMU_CMD_PCI_CFGREAD) {
	*val = (uint32_t)ret;
	}
	}

	static uint32_t pci_proxy_read_config(PCIDevice *d, uint32_t addr, int len)
	{
	uint32_t val;

	config_op_send(PCI_PROXY_DEV(d), addr, &val, len, MPQEMU_CMD_PCI_CFGREAD);

	return val;
	}

	static void pci_proxy_write_config(PCIDevice *d, uint32_t addr, uint32_t val,
	int len)
	{
	/*
	* Some of the functions access the copy of remote device's PCI config
	* space which is cached in the proxy device. Therefore, maintain
	* it updated.
	*/
	pci_default_write_config(d, addr, val, len);

	config_op_send(PCI_PROXY_DEV(d), addr, &val, len, MPQEMU_CMD_PCI_CFGWRITE);
	}

	static Property proxy_properties[] = {
	DEFINE_PROP_STRING("fd", PCIProxyDev, fd),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void pci_proxy_dev_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

	k->realize = pci_proxy_dev_realize;
	k->exit = pci_proxy_dev_exit;
	k->config_read = pci_proxy_read_config;
	k->config_write = pci_proxy_write_config;

	dc->reset = proxy_device_reset;

	device_class_set_props(dc, proxy_properties);
	}

	static const TypeInfo pci_proxy_dev_type_info = {
	.name = TYPE_PCI_PROXY_DEV,
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(PCIProxyDev),
	.class_init = pci_proxy_dev_class_init,
	.interfaces = (InterfaceInfo[]) {
	{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
	{ },
	},
	};

	static void pci_proxy_dev_register_types(void)
	{
	type_register_static(&pci_proxy_dev_type_info);
	}

	type_init(pci_proxy_dev_register_types)

	static void send_bar_access_msg(PCIProxyDev pdev, MemoryRegion mr,
	bool write, hwaddr addr, uint64_t *val,
	unsigned size, bool memory)
	{
	MPQemuMsg msg = { 0 };
	long ret = -EINVAL;
	Error *local_err = NULL;

	msg.size = sizeof(BarAccessMsg);
	msg.data.bar_access.addr = mr->addr + addr;
	msg.data.bar_access.size = size;
	msg.data.bar_access.memory = memory;

	if (write) {
	msg.cmd = MPQEMU_CMD_BAR_WRITE;
	msg.data.bar_access.val = *val;
	} else {
	msg.cmd = MPQEMU_CMD_BAR_READ;
	}

	ret = mpqemu_msg_send_and_await_reply(&msg, pdev, &local_err);
	if (local_err) {
	error_report_err(local_err);
	}

	if (!write) {
	*val = ret;
	}
	}

	static void proxy_bar_write(void *opaque, hwaddr addr, uint64_t val,
	unsigned size)
	{
	ProxyMemoryRegion *pmr = opaque;

	send_bar_access_msg(pmr->dev, &pmr->mr, true, addr, &val, size,
	pmr->memory);
	}

	static uint64_t proxy_bar_read(void *opaque, hwaddr addr, unsigned size)
	{
	ProxyMemoryRegion *pmr = opaque;
	uint64_t val;

	send_bar_access_msg(pmr->dev, &pmr->mr, false, addr, &val, size,
	pmr->memory);

	return val;
	}

	const MemoryRegionOps proxy_mr_ops = {
	.read = proxy_bar_read,
	.write = proxy_bar_write,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.impl = {
	.min_access_size = 1,
	.max_access_size = 8,
	},
	};

	static void probe_pci_info(PCIDevice dev, Error *errp)
	{
	PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
	uint32_t orig_val, new_val, base_class, val;
	PCIProxyDev *pdev = PCI_PROXY_DEV(dev);
	DeviceClass *dc = DEVICE_CLASS(pc);
	uint8_t type;
	int i, size;

	config_op_send(pdev, PCI_VENDOR_ID, &val, 2, MPQEMU_CMD_PCI_CFGREAD);
	pc->vendor_id = (uint16_t)val;

	config_op_send(pdev, PCI_DEVICE_ID, &val, 2, MPQEMU_CMD_PCI_CFGREAD);
	pc->device_id = (uint16_t)val;

	config_op_send(pdev, PCI_CLASS_DEVICE, &val, 2, MPQEMU_CMD_PCI_CFGREAD);
	pc->class_id = (uint16_t)val;

	config_op_send(pdev, PCI_SUBSYSTEM_ID, &val, 2, MPQEMU_CMD_PCI_CFGREAD);
	pc->subsystem_id = (uint16_t)val;

	base_class = pc->class_id >> 4;
	switch (base_class) {
	case PCI_BASE_CLASS_BRIDGE:
	set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
	break;
	case PCI_BASE_CLASS_STORAGE:
	set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
	break;
	case PCI_BASE_CLASS_NETWORK:
	case PCI_BASE_CLASS_WIRELESS:
	set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
	break;
	case PCI_BASE_CLASS_INPUT:
	set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
	break;
	case PCI_BASE_CLASS_DISPLAY:
	set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
	break;
	case PCI_BASE_CLASS_PROCESSOR:
	set_bit(DEVICE_CATEGORY_CPU, dc->categories);
	break;
	default:
	set_bit(DEVICE_CATEGORY_MISC, dc->categories);
	break;
	}

	for (i = 0; i < PCI_NUM_REGIONS; i++) {
	config_op_send(pdev, PCI_BASE_ADDRESS_0 + (4 * i), &orig_val, 4,
	MPQEMU_CMD_PCI_CFGREAD);
	new_val = 0xffffffff;
	config_op_send(pdev, PCI_BASE_ADDRESS_0 + (4 * i), &new_val, 4,
	MPQEMU_CMD_PCI_CFGWRITE);
	config_op_send(pdev, PCI_BASE_ADDRESS_0 + (4 * i), &new_val, 4,
	MPQEMU_CMD_PCI_CFGREAD);
	size = (~(new_val & 0xFFFFFFF0)) + 1;
	config_op_send(pdev, PCI_BASE_ADDRESS_0 + (4 * i), &orig_val, 4,
	MPQEMU_CMD_PCI_CFGWRITE);
	type = (new_val & 0x1) ?
	PCI_BASE_ADDRESS_SPACE_IO : PCI_BASE_ADDRESS_SPACE_MEMORY;

	if (size) {
	g_autofree char *name = g_strdup_printf("bar-region-%d", i);
	pdev->region[i].dev = pdev;
	pdev->region[i].present = true;
	if (type == PCI_BASE_ADDRESS_SPACE_MEMORY) {
	pdev->region[i].memory = true;
	}
	memory_region_init_io(&pdev->region[i].mr, OBJECT(pdev),
	&proxy_mr_ops, &pdev->region[i],
	name, size);
	pci_register_bar(dev, i, type, &pdev->region[i].mr);
	}
	}
	}

	static void proxy_device_reset(DeviceState *dev)
	{
	PCIProxyDev *pdev = PCI_PROXY_DEV(dev);
	MPQemuMsg msg = { 0 };
	Error *local_err = NULL;

	msg.cmd = MPQEMU_CMD_DEVICE_RESET;
	msg.size = 0;

	mpqemu_msg_send_and_await_reply(&msg, pdev, &local_err);
	if (local_err) {
	error_report_err(local_err);
	}

	}