--- /dev/null
+/*
+ * Virtio PCI Bindings
+ *
+ * Copyright IBM, Corp. 2007
+ * Copyright (c) 2009 CodeSourcery
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@us.ibm.com>
+ * Paul Brook <paul@codesourcery.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+#include <inttypes.h>
+
+#include "standard-headers/linux/virtio_pci.h"
+#include "hw/virtio/virtio.h"
+#include "hw/virtio/virtio-blk.h"
+#include "hw/virtio/virtio-net.h"
+#include "hw/virtio/virtio-serial.h"
+#include "hw/virtio/virtio-scsi.h"
+#include "hw/virtio/virtio-balloon.h"
+#include "hw/virtio/virtio-input.h"
+#include "hw/pci/pci.h"
+#include "qemu/error-report.h"
+#include "hw/pci/msi.h"
+#include "hw/pci/msix.h"
+#include "hw/loader.h"
+#include "sysemu/kvm.h"
+#include "sysemu/block-backend.h"
+#include "virtio-pci.h"
+#include "qemu/range.h"
+#include "hw/virtio/virtio-bus.h"
+#include "qapi/visitor.h"
+
+#define VIRTIO_PCI_REGION_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_present(dev))
+
+#undef VIRTIO_PCI_CONFIG
+
+/* The remaining space is defined by each driver as the per-driver
+ * configuration space */
+#define VIRTIO_PCI_CONFIG_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev))
+
+static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
+ VirtIOPCIProxy *dev);
+
+/* virtio device */
+/* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
+static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d)
+{
+ return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
+}
+
+/* DeviceState to VirtIOPCIProxy. Note: used on datapath,
+ * be careful and test performance if you change this.
+ */
+static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d)
+{
+ return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
+}
+
+static void virtio_pci_notify(DeviceState *d, uint16_t vector)
+{
+ VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d);
+
+ if (msix_enabled(&proxy->pci_dev))
+ msix_notify(&proxy->pci_dev, vector);
+ else {
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ pci_set_irq(&proxy->pci_dev, vdev->isr & 1);
+ }
+}
+
+static void virtio_pci_save_config(DeviceState *d, QEMUFile *f)
+{
+ VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+
+ pci_device_save(&proxy->pci_dev, f);
+ msix_save(&proxy->pci_dev, f);
+ if (msix_present(&proxy->pci_dev))
+ qemu_put_be16(f, vdev->config_vector);
+}
+
+static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
+{
+ VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+
+ if (msix_present(&proxy->pci_dev))
+ qemu_put_be16(f, virtio_queue_vector(vdev, n));
+}
+
+static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
+{
+ VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+
+ int ret;
+ ret = pci_device_load(&proxy->pci_dev, f);
+ if (ret) {
+ return ret;
+ }
+ msix_unuse_all_vectors(&proxy->pci_dev);
+ msix_load(&proxy->pci_dev, f);
+ if (msix_present(&proxy->pci_dev)) {
+ qemu_get_be16s(f, &vdev->config_vector);
+ } else {
+ vdev->config_vector = VIRTIO_NO_VECTOR;
+ }
+ if (vdev->config_vector != VIRTIO_NO_VECTOR) {
+ return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
+ }
+ return 0;
+}
+
+static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
+{
+ VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+
+ uint16_t vector;
+ if (msix_present(&proxy->pci_dev)) {
+ qemu_get_be16s(f, &vector);
+ } else {
+ vector = VIRTIO_NO_VECTOR;
+ }
+ virtio_queue_set_vector(vdev, n, vector);
+ if (vector != VIRTIO_NO_VECTOR) {
+ return msix_vector_use(&proxy->pci_dev, vector);
+ }
+ return 0;
+}
+
+#define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000
+
+static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
+ int n, bool assign, bool set_handler)
+{
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtQueue *vq = virtio_get_queue(vdev, n);
+ EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
+ bool legacy = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_LEGACY);
+ bool modern = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN);
+ MemoryRegion *modern_mr = &proxy->notify.mr;
+ MemoryRegion *legacy_mr = &proxy->bar;
+ hwaddr modern_addr = QEMU_VIRTIO_PCI_QUEUE_MEM_MULT *
+ virtio_get_queue_index(vq);
+ hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY;
+ int r = 0;
+
+ if (assign) {
+ r = event_notifier_init(notifier, 1);
+ if (r < 0) {
+ error_report("%s: unable to init event notifier: %d",
+ __func__, r);
+ return r;
+ }
+ virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
+ if (modern) {
+ memory_region_add_eventfd(modern_mr, modern_addr, 2,
+ true, n, notifier);
+ }
+ if (legacy) {
+ memory_region_add_eventfd(legacy_mr, legacy_addr, 2,
+ true, n, notifier);
+ }
+ } else {
+ if (modern) {
+ memory_region_del_eventfd(modern_mr, modern_addr, 2,
+ true, n, notifier);
+ }
+ if (legacy) {
+ memory_region_del_eventfd(legacy_mr, legacy_addr, 2,
+ true, n, notifier);
+ }
+ virtio_queue_set_host_notifier_fd_handler(vq, false, false);
+ event_notifier_cleanup(notifier);
+ }
+ return r;
+}
+
+static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
+{
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ int n, r;
+
+ if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) ||
+ proxy->ioeventfd_disabled ||
+ proxy->ioeventfd_started) {
+ return;
+ }
+
+ for (n = 0; n < VIRTIO_QUEUE_MAX; n++) {
+ if (!virtio_queue_get_num(vdev, n)) {
+ continue;
+ }
+
+ r = virtio_pci_set_host_notifier_internal(proxy, n, true, true);
+ if (r < 0) {
+ goto assign_error;
+ }
+ }
+ proxy->ioeventfd_started = true;
+ return;
+
+assign_error:
+ while (--n >= 0) {
+ if (!virtio_queue_get_num(vdev, n)) {
+ continue;
+ }
+
+ r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
+ assert(r >= 0);
+ }
+ proxy->ioeventfd_started = false;
+ error_report("%s: failed. Fallback to a userspace (slower).", __func__);
+}
+
+static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
+{
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ int r;
+ int n;
+
+ if (!proxy->ioeventfd_started) {
+ return;
+ }
+
+ for (n = 0; n < VIRTIO_QUEUE_MAX; n++) {
+ if (!virtio_queue_get_num(vdev, n)) {
+ continue;
+ }
+
+ r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
+ assert(r >= 0);
+ }
+ proxy->ioeventfd_started = false;
+}
+
+static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ VirtIOPCIProxy *proxy = opaque;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ hwaddr pa;
+
+ switch (addr) {
+ case VIRTIO_PCI_GUEST_FEATURES:
+ /* Guest does not negotiate properly? We have to assume nothing. */
+ if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
+ val = virtio_bus_get_vdev_bad_features(&proxy->bus);
+ }
+ virtio_set_features(vdev, val);
+ break;
+ case VIRTIO_PCI_QUEUE_PFN:
+ pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
+ if (pa == 0) {
+ virtio_pci_stop_ioeventfd(proxy);
+ virtio_reset(vdev);
+ msix_unuse_all_vectors(&proxy->pci_dev);
+ }
+ else
+ virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
+ break;
+ case VIRTIO_PCI_QUEUE_SEL:
+ if (val < VIRTIO_QUEUE_MAX)
+ vdev->queue_sel = val;
+ break;
+ case VIRTIO_PCI_QUEUE_NOTIFY:
+ if (val < VIRTIO_QUEUE_MAX) {
+ virtio_queue_notify(vdev, val);
+ }
+ break;
+ case VIRTIO_PCI_STATUS:
+ if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
+ virtio_pci_stop_ioeventfd(proxy);
+ }
+
+ virtio_set_status(vdev, val & 0xFF);
+
+ if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
+ virtio_pci_start_ioeventfd(proxy);
+ }
+
+ if (vdev->status == 0) {
+ virtio_reset(vdev);
+ msix_unuse_all_vectors(&proxy->pci_dev);
+ }
+
+ /* Linux before 2.6.34 drives the device without enabling
+ the PCI device bus master bit. Enable it automatically
+ for the guest. This is a PCI spec violation but so is
+ initiating DMA with bus master bit clear. */
+ if (val == (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER)) {
+ pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
+ proxy->pci_dev.config[PCI_COMMAND] |
+ PCI_COMMAND_MASTER, 1);
+ }
+ break;
+ case VIRTIO_MSI_CONFIG_VECTOR:
+ msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
+ /* Make it possible for guest to discover an error took place. */
+ if (msix_vector_use(&proxy->pci_dev, val) < 0)
+ val = VIRTIO_NO_VECTOR;
+ vdev->config_vector = val;
+ break;
+ case VIRTIO_MSI_QUEUE_VECTOR:
+ msix_vector_unuse(&proxy->pci_dev,
+ virtio_queue_vector(vdev, vdev->queue_sel));
+ /* Make it possible for guest to discover an error took place. */
+ if (msix_vector_use(&proxy->pci_dev, val) < 0)
+ val = VIRTIO_NO_VECTOR;
+ virtio_queue_set_vector(vdev, vdev->queue_sel, val);
+ break;
+ default:
+ error_report("%s: unexpected address 0x%x value 0x%x",
+ __func__, addr, val);
+ break;
+ }
+}
+
+static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
+{
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ uint32_t ret = 0xFFFFFFFF;
+
+ switch (addr) {
+ case VIRTIO_PCI_HOST_FEATURES:
+ ret = vdev->host_features;
+ break;
+ case VIRTIO_PCI_GUEST_FEATURES:
+ ret = vdev->guest_features;
+ break;
+ case VIRTIO_PCI_QUEUE_PFN:
+ ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
+ >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
+ break;
+ case VIRTIO_PCI_QUEUE_NUM:
+ ret = virtio_queue_get_num(vdev, vdev->queue_sel);
+ break;
+ case VIRTIO_PCI_QUEUE_SEL:
+ ret = vdev->queue_sel;
+ break;
+ case VIRTIO_PCI_STATUS:
+ ret = vdev->status;
+ break;
+ case VIRTIO_PCI_ISR:
+ /* reading from the ISR also clears it. */
+ ret = vdev->isr;
+ vdev->isr = 0;
+ pci_irq_deassert(&proxy->pci_dev);
+ break;
+ case VIRTIO_MSI_CONFIG_VECTOR:
+ ret = vdev->config_vector;
+ break;
+ case VIRTIO_MSI_QUEUE_VECTOR:
+ ret = virtio_queue_vector(vdev, vdev->queue_sel);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ VirtIOPCIProxy *proxy = opaque;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
+ uint64_t val = 0;
+ if (addr < config) {
+ return virtio_ioport_read(proxy, addr);
+ }
+ addr -= config;
+
+ switch (size) {
+ case 1:
+ val = virtio_config_readb(vdev, addr);
+ break;
+ case 2:
+ val = virtio_config_readw(vdev, addr);
+ if (virtio_is_big_endian(vdev)) {
+ val = bswap16(val);
+ }
+ break;
+ case 4:
+ val = virtio_config_readl(vdev, addr);
+ if (virtio_is_big_endian(vdev)) {
+ val = bswap32(val);
+ }
+ break;
+ }
+ return val;
+}
+
+static void virtio_pci_config_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned size)
+{
+ VirtIOPCIProxy *proxy = opaque;
+ uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ if (addr < config) {
+ virtio_ioport_write(proxy, addr, val);
+ return;
+ }
+ addr -= config;
+ /*
+ * Virtio-PCI is odd. Ioports are LE but config space is target native
+ * endian.
+ */
+ switch (size) {
+ case 1:
+ virtio_config_writeb(vdev, addr, val);
+ break;
+ case 2:
+ if (virtio_is_big_endian(vdev)) {
+ val = bswap16(val);
+ }
+ virtio_config_writew(vdev, addr, val);
+ break;
+ case 4:
+ if (virtio_is_big_endian(vdev)) {
+ val = bswap32(val);
+ }
+ virtio_config_writel(vdev, addr, val);
+ break;
+ }
+}
+
+static const MemoryRegionOps virtio_pci_config_ops = {
+ .read = virtio_pci_config_read,
+ .write = virtio_pci_config_write,
+ .impl = {
+ .min_access_size = 1,
+ .max_access_size = 4,
+ },
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+/* Below are generic functions to do memcpy from/to an address space,
+ * without byteswaps, with input validation.
+ *
+ * As regular address_space_* APIs all do some kind of byteswap at least for
+ * some host/target combinations, we are forced to explicitly convert to a
+ * known-endianness integer value.
+ * It doesn't really matter which endian format to go through, so the code
+ * below selects the endian that causes the least amount of work on the given
+ * host.
+ *
+ * Note: host pointer must be aligned.
+ */
+static
+void virtio_address_space_write(AddressSpace *as, hwaddr addr,
+ const uint8_t *buf, int len)
+{
+ uint32_t val;
+
+ /* address_space_* APIs assume an aligned address.
+ * As address is under guest control, handle illegal values.
+ */
+ addr &= ~(len - 1);
+
+ /* Make sure caller aligned buf properly */
+ assert(!(((uintptr_t)buf) & (len - 1)));
+
+ switch (len) {
+ case 1:
+ val = pci_get_byte(buf);
+ address_space_stb(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
+ break;
+ case 2:
+ val = pci_get_word(buf);
+ address_space_stw_le(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
+ break;
+ case 4:
+ val = pci_get_long(buf);
+ address_space_stl_le(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
+ break;
+ default:
+ /* As length is under guest control, handle illegal values. */
+ break;
+ }
+}
+
+static void
+virtio_address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len)
+{
+ uint32_t val;
+
+ /* address_space_* APIs assume an aligned address.
+ * As address is under guest control, handle illegal values.
+ */
+ addr &= ~(len - 1);
+
+ /* Make sure caller aligned buf properly */
+ assert(!(((uintptr_t)buf) & (len - 1)));
+
+ switch (len) {
+ case 1:
+ val = address_space_ldub(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
+ pci_set_byte(buf, val);
+ break;
+ case 2:
+ val = address_space_lduw_le(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
+ pci_set_word(buf, val);
+ break;
+ case 4:
+ val = address_space_ldl_le(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
+ pci_set_long(buf, val);
+ break;
+ default:
+ /* As length is under guest control, handle illegal values. */
+ break;
+ }
+}
+
+static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
+ uint32_t val, int len)
+{
+ VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ struct virtio_pci_cfg_cap *cfg;
+
+ pci_default_write_config(pci_dev, address, val, len);
+
+ if (range_covers_byte(address, len, PCI_COMMAND) &&
+ !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
+ virtio_pci_stop_ioeventfd(proxy);
+ virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
+ }
+
+ if (proxy->config_cap &&
+ ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
+ pci_cfg_data),
+ sizeof cfg->pci_cfg_data)) {
+ uint32_t off;
+ uint32_t len;
+
+ cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
+ off = le32_to_cpu(cfg->cap.offset);
+ len = le32_to_cpu(cfg->cap.length);
+
+ if (len == 1 || len == 2 || len == 4) {
+ assert(len <= sizeof cfg->pci_cfg_data);
+ virtio_address_space_write(&proxy->modern_as, off,
+ cfg->pci_cfg_data, len);
+ }
+ }
+}
+
+static uint32_t virtio_read_config(PCIDevice *pci_dev,
+ uint32_t address, int len)
+{
+ VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
+ struct virtio_pci_cfg_cap *cfg;
+
+ if (proxy->config_cap &&
+ ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
+ pci_cfg_data),
+ sizeof cfg->pci_cfg_data)) {
+ uint32_t off;
+ uint32_t len;
+
+ cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
+ off = le32_to_cpu(cfg->cap.offset);
+ len = le32_to_cpu(cfg->cap.length);
+
+ if (len == 1 || len == 2 || len == 4) {
+ assert(len <= sizeof cfg->pci_cfg_data);
+ virtio_address_space_read(&proxy->modern_as, off,
+ cfg->pci_cfg_data, len);
+ }
+ }
+
+ return pci_default_read_config(pci_dev, address, len);
+}
+
+static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
+ unsigned int queue_no,
+ unsigned int vector,
+ MSIMessage msg)
+{
+ VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
+ int ret;
+
+ if (irqfd->users == 0) {
+ ret = kvm_irqchip_add_msi_route(kvm_state, msg);
+ if (ret < 0) {
+ return ret;
+ }
+ irqfd->virq = ret;
+ }
+ irqfd->users++;
+ return 0;
+}
+
+static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
+ unsigned int vector)
+{
+ VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
+ if (--irqfd->users == 0) {
+ kvm_irqchip_release_virq(kvm_state, irqfd->virq);
+ }
+}
+
+static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
+ unsigned int queue_no,
+ unsigned int vector)
+{
+ VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtQueue *vq = virtio_get_queue(vdev, queue_no);
+ EventNotifier *n = virtio_queue_get_guest_notifier(vq);
+ int ret;
+ ret = kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq);
+ return ret;
+}
+
+static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
+ unsigned int queue_no,
+ unsigned int vector)
+{
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtQueue *vq = virtio_get_queue(vdev, queue_no);
+ EventNotifier *n = virtio_queue_get_guest_notifier(vq);
+ VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
+ int ret;
+
+ ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq);
+ assert(ret == 0);
+}
+
+static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
+{
+ PCIDevice *dev = &proxy->pci_dev;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
+ unsigned int vector;
+ int ret, queue_no;
+ MSIMessage msg;
+
+ for (queue_no = 0; queue_no < nvqs; queue_no++) {
+ if (!virtio_queue_get_num(vdev, queue_no)) {
+ break;
+ }
+ vector = virtio_queue_vector(vdev, queue_no);
+ if (vector >= msix_nr_vectors_allocated(dev)) {
+ continue;
+ }
+ msg = msix_get_message(dev, vector);
+ ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg);
+ if (ret < 0) {
+ goto undo;
+ }
+ /* If guest supports masking, set up irqfd now.
+ * Otherwise, delay until unmasked in the frontend.
+ */
+ if (k->guest_notifier_mask) {
+ ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
+ if (ret < 0) {
+ kvm_virtio_pci_vq_vector_release(proxy, vector);
+ goto undo;
+ }
+ }
+ }
+ return 0;
+
+undo:
+ while (--queue_no >= 0) {
+ vector = virtio_queue_vector(vdev, queue_no);
+ if (vector >= msix_nr_vectors_allocated(dev)) {
+ continue;
+ }
+ if (k->guest_notifier_mask) {
+ kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
+ }
+ kvm_virtio_pci_vq_vector_release(proxy, vector);
+ }
+ return ret;
+}
+
+static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
+{
+ PCIDevice *dev = &proxy->pci_dev;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ unsigned int vector;
+ int queue_no;
+ VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
+
+ for (queue_no = 0; queue_no < nvqs; queue_no++) {
+ if (!virtio_queue_get_num(vdev, queue_no)) {
+ break;
+ }
+ vector = virtio_queue_vector(vdev, queue_no);
+ if (vector >= msix_nr_vectors_allocated(dev)) {
+ continue;
+ }
+ /* If guest supports masking, clean up irqfd now.
+ * Otherwise, it was cleaned when masked in the frontend.
+ */
+ if (k->guest_notifier_mask) {
+ kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
+ }
+ kvm_virtio_pci_vq_vector_release(proxy, vector);
+ }
+}
+
+static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
+ unsigned int queue_no,
+ unsigned int vector,
+ MSIMessage msg)
+{
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
+ VirtQueue *vq = virtio_get_queue(vdev, queue_no);
+ EventNotifier *n = virtio_queue_get_guest_notifier(vq);
+ VirtIOIRQFD *irqfd;
+ int ret = 0;
+
+ if (proxy->vector_irqfd) {
+ irqfd = &proxy->vector_irqfd[vector];
+ if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
+ ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg);
+ if (ret < 0) {
+ return ret;
+ }
+ }
+ }
+
+ /* If guest supports masking, irqfd is already setup, unmask it.
+ * Otherwise, set it up now.
+ */
+ if (k->guest_notifier_mask) {
+ k->guest_notifier_mask(vdev, queue_no, false);
+ /* Test after unmasking to avoid losing events. */
+ if (k->guest_notifier_pending &&
+ k->guest_notifier_pending(vdev, queue_no)) {
+ event_notifier_set(n);
+ }
+ } else {
+ ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
+ }
+ return ret;
+}
+
+static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
+ unsigned int queue_no,
+ unsigned int vector)
+{
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
+
+ /* If guest supports masking, keep irqfd but mask it.
+ * Otherwise, clean it up now.
+ */
+ if (k->guest_notifier_mask) {
+ k->guest_notifier_mask(vdev, queue_no, true);
+ } else {
+ kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
+ }
+}
+
+static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
+ MSIMessage msg)
+{
+ VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
+ int ret, index, unmasked = 0;
+
+ while (vq) {
+ index = virtio_get_queue_index(vq);
+ if (!virtio_queue_get_num(vdev, index)) {
+ break;
+ }
+ if (index < proxy->nvqs_with_notifiers) {
+ ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg);
+ if (ret < 0) {
+ goto undo;
+ }
+ ++unmasked;
+ }
+ vq = virtio_vector_next_queue(vq);
+ }
+
+ return 0;
+
+undo:
+ vq = virtio_vector_first_queue(vdev, vector);
+ while (vq && unmasked >= 0) {
+ index = virtio_get_queue_index(vq);
+ if (index < proxy->nvqs_with_notifiers) {
+ virtio_pci_vq_vector_mask(proxy, index, vector);
+ --unmasked;
+ }
+ vq = virtio_vector_next_queue(vq);
+ }
+ return ret;
+}
+
+static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
+{
+ VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
+ int index;
+
+ while (vq) {
+ index = virtio_get_queue_index(vq);
+ if (!virtio_queue_get_num(vdev, index)) {
+ break;
+ }
+ if (index < proxy->nvqs_with_notifiers) {
+ virtio_pci_vq_vector_mask(proxy, index, vector);
+ }
+ vq = virtio_vector_next_queue(vq);
+ }
+}
+
+static void virtio_pci_vector_poll(PCIDevice *dev,
+ unsigned int vector_start,
+ unsigned int vector_end)
+{
+ VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
+ int queue_no;
+ unsigned int vector;
+ EventNotifier *notifier;
+ VirtQueue *vq;
+
+ for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
+ if (!virtio_queue_get_num(vdev, queue_no)) {
+ break;
+ }
+ vector = virtio_queue_vector(vdev, queue_no);
+ if (vector < vector_start || vector >= vector_end ||
+ !msix_is_masked(dev, vector)) {
+ continue;
+ }
+ vq = virtio_get_queue(vdev, queue_no);
+ notifier = virtio_queue_get_guest_notifier(vq);
+ if (k->guest_notifier_pending) {
+ if (k->guest_notifier_pending(vdev, queue_no)) {
+ msix_set_pending(dev, vector);
+ }
+ } else if (event_notifier_test_and_clear(notifier)) {
+ msix_set_pending(dev, vector);
+ }
+ }
+}
+
+static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
+ bool with_irqfd)
+{
+ VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
+ VirtQueue *vq = virtio_get_queue(vdev, n);
+ EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
+
+ if (assign) {
+ int r = event_notifier_init(notifier, 0);
+ if (r < 0) {
+ return r;
+ }
+ virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
+ } else {
+ virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
+ event_notifier_cleanup(notifier);
+ }
+
+ if (!msix_enabled(&proxy->pci_dev) && vdc->guest_notifier_mask) {
+ vdc->guest_notifier_mask(vdev, n, !assign);
+ }
+
+ return 0;
+}
+
+static bool virtio_pci_query_guest_notifiers(DeviceState *d)
+{
+ VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
+ return msix_enabled(&proxy->pci_dev);
+}
+
+static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
+{
+ VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
+ int r, n;
+ bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
+ kvm_msi_via_irqfd_enabled();
+
+ nvqs = MIN(nvqs, VIRTIO_QUEUE_MAX);
+
+ /* When deassigning, pass a consistent nvqs value
+ * to avoid leaking notifiers.
+ */
+ assert(assign || nvqs == proxy->nvqs_with_notifiers);
+
+ proxy->nvqs_with_notifiers = nvqs;
+
+ /* Must unset vector notifier while guest notifier is still assigned */
+ if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
+ msix_unset_vector_notifiers(&proxy->pci_dev);
+ if (proxy->vector_irqfd) {
+ kvm_virtio_pci_vector_release(proxy, nvqs);
+ g_free(proxy->vector_irqfd);
+ proxy->vector_irqfd = NULL;
+ }
+ }
+
+ for (n = 0; n < nvqs; n++) {
+ if (!virtio_queue_get_num(vdev, n)) {
+ break;
+ }
+
+ r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd);
+ if (r < 0) {
+ goto assign_error;
+ }
+ }
+
+ /* Must set vector notifier after guest notifier has been assigned */
+ if ((with_irqfd || k->guest_notifier_mask) && assign) {
+ if (with_irqfd) {
+ proxy->vector_irqfd =
+ g_malloc0(sizeof(*proxy->vector_irqfd) *
+ msix_nr_vectors_allocated(&proxy->pci_dev));
+ r = kvm_virtio_pci_vector_use(proxy, nvqs);
+ if (r < 0) {
+ goto assign_error;
+ }
+ }
+ r = msix_set_vector_notifiers(&proxy->pci_dev,
+ virtio_pci_vector_unmask,
+ virtio_pci_vector_mask,
+ virtio_pci_vector_poll);
+ if (r < 0) {
+ goto notifiers_error;
+ }
+ }
+
+ return 0;
+
+notifiers_error:
+ if (with_irqfd) {
+ assert(assign);
+ kvm_virtio_pci_vector_release(proxy, nvqs);
+ }
+
+assign_error:
+ /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
+ assert(assign);
+ while (--n >= 0) {
+ virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
+ }
+ return r;
+}
+
+static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign)
+{
+ VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
+
+ /* Stop using ioeventfd for virtqueue kick if the device starts using host
+ * notifiers. This makes it easy to avoid stepping on each others' toes.
+ */
+ proxy->ioeventfd_disabled = assign;
+ if (assign) {
+ virtio_pci_stop_ioeventfd(proxy);
+ }
+ /* We don't need to start here: it's not needed because backend
+ * currently only stops on status change away from ok,
+ * reset, vmstop and such. If we do add code to start here,
+ * need to check vmstate, device state etc. */
+ return virtio_pci_set_host_notifier_internal(proxy, n, assign, false);
+}
+
+static void virtio_pci_vmstate_change(DeviceState *d, bool running)
+{
+ VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+
+ if (running) {
+ /* Old QEMU versions did not set bus master enable on status write.
+ * Detect DRIVER set and enable it.
+ */
+ if ((proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION) &&
+ (vdev->status & VIRTIO_CONFIG_S_DRIVER) &&
+ !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
+ pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
+ proxy->pci_dev.config[PCI_COMMAND] |
+ PCI_COMMAND_MASTER, 1);
+ }
+ virtio_pci_start_ioeventfd(proxy);
+ } else {
+ virtio_pci_stop_ioeventfd(proxy);
+ }
+}
+
+#ifdef CONFIG_VIRTFS
+static void virtio_9p_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+ V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev);
+ DeviceState *vdev = DEVICE(&dev->vdev);
+
+ qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
+}
+
+static Property virtio_9p_pci_properties[] = {
+ DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
+ VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
+ DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_9p_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+ VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+
+ k->realize = virtio_9p_pci_realize;
+ pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+ pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P;
+ pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
+ pcidev_k->class_id = 0x2;
+ set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ dc->props = virtio_9p_pci_properties;
+}
+
+static void virtio_9p_pci_instance_init(Object *obj)
+{
+ V9fsPCIState *dev = VIRTIO_9P_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VIRTIO_9P);
+}
+
+static const TypeInfo virtio_9p_pci_info = {
+ .name = TYPE_VIRTIO_9P_PCI,
+ .parent = TYPE_VIRTIO_PCI,
+ .instance_size = sizeof(V9fsPCIState),
+ .instance_init = virtio_9p_pci_instance_init,
+ .class_init = virtio_9p_pci_class_init,
+};
+#endif /* CONFIG_VIRTFS */
+
+/*
+ * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
+ */
+
+static int virtio_pci_query_nvectors(DeviceState *d)
+{
+ VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
+
+ return proxy->nvectors;
+}
+
+static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy,
+ struct virtio_pci_cap *cap)
+{
+ PCIDevice *dev = &proxy->pci_dev;
+ int offset;
+
+ offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0, cap->cap_len);
+ assert(offset > 0);
+
+ assert(cap->cap_len >= sizeof *cap);
+ memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len,
+ cap->cap_len - PCI_CAP_FLAGS);
+
+ return offset;
+}
+
+static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ VirtIOPCIProxy *proxy = opaque;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ uint32_t val = 0;
+ int i;
+
+ switch (addr) {
+ case VIRTIO_PCI_COMMON_DFSELECT:
+ val = proxy->dfselect;
+ break;
+ case VIRTIO_PCI_COMMON_DF:
+ if (proxy->dfselect <= 1) {
+ val = (vdev->host_features & ~VIRTIO_LEGACY_FEATURES) >>
+ (32 * proxy->dfselect);
+ }
+ break;
+ case VIRTIO_PCI_COMMON_GFSELECT:
+ val = proxy->gfselect;
+ break;
+ case VIRTIO_PCI_COMMON_GF:
+ if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
+ val = proxy->guest_features[proxy->gfselect];
+ }
+ break;
+ case VIRTIO_PCI_COMMON_MSIX:
+ val = vdev->config_vector;
+ break;
+ case VIRTIO_PCI_COMMON_NUMQ:
+ for (i = 0; i < VIRTIO_QUEUE_MAX; ++i) {
+ if (virtio_queue_get_num(vdev, i)) {
+ val = i + 1;
+ }
+ }
+ break;
+ case VIRTIO_PCI_COMMON_STATUS:
+ val = vdev->status;
+ break;
+ case VIRTIO_PCI_COMMON_CFGGENERATION:
+ val = vdev->generation;
+ break;
+ case VIRTIO_PCI_COMMON_Q_SELECT:
+ val = vdev->queue_sel;
+ break;
+ case VIRTIO_PCI_COMMON_Q_SIZE:
+ val = virtio_queue_get_num(vdev, vdev->queue_sel);
+ break;
+ case VIRTIO_PCI_COMMON_Q_MSIX:
+ val = virtio_queue_vector(vdev, vdev->queue_sel);
+ break;
+ case VIRTIO_PCI_COMMON_Q_ENABLE:
+ val = proxy->vqs[vdev->queue_sel].enabled;
+ break;
+ case VIRTIO_PCI_COMMON_Q_NOFF:
+ /* Simply map queues in order */
+ val = vdev->queue_sel;
+ break;
+ case VIRTIO_PCI_COMMON_Q_DESCLO:
+ val = proxy->vqs[vdev->queue_sel].desc[0];
+ break;
+ case VIRTIO_PCI_COMMON_Q_DESCHI:
+ val = proxy->vqs[vdev->queue_sel].desc[1];
+ break;
+ case VIRTIO_PCI_COMMON_Q_AVAILLO:
+ val = proxy->vqs[vdev->queue_sel].avail[0];
+ break;
+ case VIRTIO_PCI_COMMON_Q_AVAILHI:
+ val = proxy->vqs[vdev->queue_sel].avail[1];
+ break;
+ case VIRTIO_PCI_COMMON_Q_USEDLO:
+ val = proxy->vqs[vdev->queue_sel].used[0];
+ break;
+ case VIRTIO_PCI_COMMON_Q_USEDHI:
+ val = proxy->vqs[vdev->queue_sel].used[1];
+ break;
+ default:
+ val = 0;
+ }
+
+ return val;
+}
+
+static void virtio_pci_common_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned size)
+{
+ VirtIOPCIProxy *proxy = opaque;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+
+ switch (addr) {
+ case VIRTIO_PCI_COMMON_DFSELECT:
+ proxy->dfselect = val;
+ break;
+ case VIRTIO_PCI_COMMON_GFSELECT:
+ proxy->gfselect = val;
+ break;
+ case VIRTIO_PCI_COMMON_GF:
+ if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
+ proxy->guest_features[proxy->gfselect] = val;
+ virtio_set_features(vdev,
+ (((uint64_t)proxy->guest_features[1]) << 32) |
+ proxy->guest_features[0]);
+ }
+ break;
+ case VIRTIO_PCI_COMMON_MSIX:
+ msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
+ /* Make it possible for guest to discover an error took place. */
+ if (msix_vector_use(&proxy->pci_dev, val) < 0) {
+ val = VIRTIO_NO_VECTOR;
+ }
+ vdev->config_vector = val;
+ break;
+ case VIRTIO_PCI_COMMON_STATUS:
+ if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
+ virtio_pci_stop_ioeventfd(proxy);
+ }
+
+ virtio_set_status(vdev, val & 0xFF);
+
+ if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
+ virtio_pci_start_ioeventfd(proxy);
+ }
+
+ if (vdev->status == 0) {
+ virtio_reset(vdev);
+ msix_unuse_all_vectors(&proxy->pci_dev);
+ }
+
+ break;
+ case VIRTIO_PCI_COMMON_Q_SELECT:
+ if (val < VIRTIO_QUEUE_MAX) {
+ vdev->queue_sel = val;
+ }
+ break;
+ case VIRTIO_PCI_COMMON_Q_SIZE:
+ proxy->vqs[vdev->queue_sel].num = val;
+ break;
+ case VIRTIO_PCI_COMMON_Q_MSIX:
+ msix_vector_unuse(&proxy->pci_dev,
+ virtio_queue_vector(vdev, vdev->queue_sel));
+ /* Make it possible for guest to discover an error took place. */
+ if (msix_vector_use(&proxy->pci_dev, val) < 0) {
+ val = VIRTIO_NO_VECTOR;
+ }
+ virtio_queue_set_vector(vdev, vdev->queue_sel, val);
+ break;
+ case VIRTIO_PCI_COMMON_Q_ENABLE:
+ /* TODO: need a way to put num back on reset. */
+ virtio_queue_set_num(vdev, vdev->queue_sel,
+ proxy->vqs[vdev->queue_sel].num);
+ virtio_queue_set_rings(vdev, vdev->queue_sel,
+ ((uint64_t)proxy->vqs[vdev->queue_sel].desc[1]) << 32 |
+ proxy->vqs[vdev->queue_sel].desc[0],
+ ((uint64_t)proxy->vqs[vdev->queue_sel].avail[1]) << 32 |
+ proxy->vqs[vdev->queue_sel].avail[0],
+ ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << 32 |
+ proxy->vqs[vdev->queue_sel].used[0]);
+ break;
+ case VIRTIO_PCI_COMMON_Q_DESCLO:
+ proxy->vqs[vdev->queue_sel].desc[0] = val;
+ break;
+ case VIRTIO_PCI_COMMON_Q_DESCHI:
+ proxy->vqs[vdev->queue_sel].desc[1] = val;
+ break;
+ case VIRTIO_PCI_COMMON_Q_AVAILLO:
+ proxy->vqs[vdev->queue_sel].avail[0] = val;
+ break;
+ case VIRTIO_PCI_COMMON_Q_AVAILHI:
+ proxy->vqs[vdev->queue_sel].avail[1] = val;
+ break;
+ case VIRTIO_PCI_COMMON_Q_USEDLO:
+ proxy->vqs[vdev->queue_sel].used[0] = val;
+ break;
+ case VIRTIO_PCI_COMMON_Q_USEDHI:
+ proxy->vqs[vdev->queue_sel].used[1] = val;
+ break;
+ default:
+ break;
+ }
+}
+
+
+static uint64_t virtio_pci_notify_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ return 0;
+}
+
+static void virtio_pci_notify_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned size)
+{
+ VirtIODevice *vdev = opaque;
+ unsigned queue = addr / QEMU_VIRTIO_PCI_QUEUE_MEM_MULT;
+
+ if (queue < VIRTIO_QUEUE_MAX) {
+ virtio_queue_notify(vdev, queue);
+ }
+}
+
+static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ VirtIOPCIProxy *proxy = opaque;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ uint64_t val = vdev->isr;
+
+ vdev->isr = 0;
+ pci_irq_deassert(&proxy->pci_dev);
+
+ return val;
+}
+
+static void virtio_pci_isr_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned size)
+{
+}
+
+static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ VirtIODevice *vdev = opaque;
+ uint64_t val = 0;
+
+ switch (size) {
+ case 1:
+ val = virtio_config_modern_readb(vdev, addr);
+ break;
+ case 2:
+ val = virtio_config_modern_readw(vdev, addr);
+ break;
+ case 4:
+ val = virtio_config_modern_readl(vdev, addr);
+ break;
+ }
+ return val;
+}
+
+static void virtio_pci_device_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned size)
+{
+ VirtIODevice *vdev = opaque;
+ switch (size) {
+ case 1:
+ virtio_config_modern_writeb(vdev, addr, val);
+ break;
+ case 2:
+ virtio_config_modern_writew(vdev, addr, val);
+ break;
+ case 4:
+ virtio_config_modern_writel(vdev, addr, val);
+ break;
+ }
+}
+
+static void virtio_pci_modern_regions_init(VirtIOPCIProxy *proxy)
+{
+ static const MemoryRegionOps common_ops = {
+ .read = virtio_pci_common_read,
+ .write = virtio_pci_common_write,
+ .impl = {
+ .min_access_size = 1,
+ .max_access_size = 4,
+ },
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ };
+ static const MemoryRegionOps isr_ops = {
+ .read = virtio_pci_isr_read,
+ .write = virtio_pci_isr_write,
+ .impl = {
+ .min_access_size = 1,
+ .max_access_size = 4,
+ },
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ };
+ static const MemoryRegionOps device_ops = {
+ .read = virtio_pci_device_read,
+ .write = virtio_pci_device_write,
+ .impl = {
+ .min_access_size = 1,
+ .max_access_size = 4,
+ },
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ };
+ static const MemoryRegionOps notify_ops = {
+ .read = virtio_pci_notify_read,
+ .write = virtio_pci_notify_write,
+ .impl = {
+ .min_access_size = 1,
+ .max_access_size = 4,
+ },
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ };
+
+ memory_region_init_io(&proxy->common.mr, OBJECT(proxy),
+ &common_ops,
+ proxy,
+ "virtio-pci-common",
+ proxy->common.size);
+
+ memory_region_init_io(&proxy->isr.mr, OBJECT(proxy),
+ &isr_ops,
+ proxy,
+ "virtio-pci-isr",
+ proxy->isr.size);
+
+ memory_region_init_io(&proxy->device.mr, OBJECT(proxy),
+ &device_ops,
+ virtio_bus_get_device(&proxy->bus),
+ "virtio-pci-device",
+ proxy->device.size);
+
+ memory_region_init_io(&proxy->notify.mr, OBJECT(proxy),
+ ¬ify_ops,
+ virtio_bus_get_device(&proxy->bus),
+ "virtio-pci-notify",
+ proxy->notify.size);
+}
+
+static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy,
+ VirtIOPCIRegion *region,
+ struct virtio_pci_cap *cap)
+{
+ memory_region_add_subregion(&proxy->modern_bar,
+ region->offset,
+ ®ion->mr);
+
+ cap->cfg_type = region->type;
+ cap->bar = proxy->modern_mem_bar;
+ cap->offset = cpu_to_le32(region->offset);
+ cap->length = cpu_to_le32(region->size);
+ virtio_pci_add_mem_cap(proxy, cap);
+}
+
+static void virtio_pci_modern_region_unmap(VirtIOPCIProxy *proxy,
+ VirtIOPCIRegion *region)
+{
+ memory_region_del_subregion(&proxy->modern_bar,
+ ®ion->mr);
+}
+
+/* This is called by virtio-bus just after the device is plugged. */
+static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
+{
+ VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
+ VirtioBusState *bus = &proxy->bus;
+ bool legacy = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_LEGACY);
+ bool modern = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN);
+ uint8_t *config;
+ uint32_t size;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+
+ config = proxy->pci_dev.config;
+ if (proxy->class_code) {
+ pci_config_set_class(config, proxy->class_code);
+ }
+
+ if (legacy) {
+ /* legacy and transitional */
+ pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
+ pci_get_word(config + PCI_VENDOR_ID));
+ pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
+ } else {
+ /* pure virtio-1.0 */
+ pci_set_word(config + PCI_VENDOR_ID,
+ PCI_VENDOR_ID_REDHAT_QUMRANET);
+ pci_set_word(config + PCI_DEVICE_ID,
+ 0x1040 + virtio_bus_get_vdev_id(bus));
+ pci_config_set_revision(config, 1);
+ }
+ config[PCI_INTERRUPT_PIN] = 1;
+
+
+ if (modern) {
+ struct virtio_pci_cap cap = {
+ .cap_len = sizeof cap,
+ };
+ struct virtio_pci_notify_cap notify = {
+ .cap.cap_len = sizeof notify,
+ .notify_off_multiplier =
+ cpu_to_le32(QEMU_VIRTIO_PCI_QUEUE_MEM_MULT),
+ };
+ struct virtio_pci_cfg_cap cfg = {
+ .cap.cap_len = sizeof cfg,
+ .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG,
+ };
+ struct virtio_pci_cfg_cap *cfg_mask;
+
+ /* TODO: add io access for speed */
+
+ virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
+ virtio_pci_modern_regions_init(proxy);
+ virtio_pci_modern_region_map(proxy, &proxy->common, &cap);
+ virtio_pci_modern_region_map(proxy, &proxy->isr, &cap);
+ virtio_pci_modern_region_map(proxy, &proxy->device, &cap);
+ virtio_pci_modern_region_map(proxy, &proxy->notify, ¬ify.cap);
+
+ pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar,
+ PCI_BASE_ADDRESS_SPACE_MEMORY |
+ PCI_BASE_ADDRESS_MEM_PREFETCH |
+ PCI_BASE_ADDRESS_MEM_TYPE_64,
+ &proxy->modern_bar);
+
+ proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
+ cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap);
+ pci_set_byte(&cfg_mask->cap.bar, ~0x0);
+ pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0);
+ pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0);
+ pci_set_long(cfg_mask->pci_cfg_data, ~0x0);
+ }
+
+ if (proxy->nvectors &&
+ msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors,
+ proxy->msix_bar)) {
+ error_report("unable to init msix vectors to %" PRIu32,
+ proxy->nvectors);
+ proxy->nvectors = 0;
+ }
+
+ proxy->pci_dev.config_write = virtio_write_config;
+ proxy->pci_dev.config_read = virtio_read_config;
+
+ if (legacy) {
+ size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
+ + virtio_bus_get_vdev_config_len(bus);
+ if (size & (size - 1)) {
+ size = 1 << qemu_fls(size);
+ }
+
+ memory_region_init_io(&proxy->bar, OBJECT(proxy),
+ &virtio_pci_config_ops,
+ proxy, "virtio-pci", size);
+
+ pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar,
+ PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar);
+ }
+
+ if (!kvm_has_many_ioeventfds()) {
+ proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
+ }
+
+ virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE);
+}
+
+static void virtio_pci_device_unplugged(DeviceState *d)
+{
+ VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
+ bool modern = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN);
+
+ virtio_pci_stop_ioeventfd(proxy);
+
+ if (modern) {
+ virtio_pci_modern_region_unmap(proxy, &proxy->common);
+ virtio_pci_modern_region_unmap(proxy, &proxy->isr);
+ virtio_pci_modern_region_unmap(proxy, &proxy->device);
+ virtio_pci_modern_region_unmap(proxy, &proxy->notify);
+ }
+}
+
+static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
+{
+ VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
+ VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
+
+ /*
+ * virtio pci bar layout used by default.
+ * subclasses can re-arrange things if needed.
+ *
+ * region 0 -- virtio legacy io bar
+ * region 1 -- msi-x bar
+ * region 4+5 -- virtio modern memory (64bit) bar
+ *
+ */
+ proxy->legacy_io_bar = 0;
+ proxy->msix_bar = 1;
+ proxy->modern_mem_bar = 4;
+
+ proxy->common.offset = 0x0;
+ proxy->common.size = 0x1000;
+ proxy->common.type = VIRTIO_PCI_CAP_COMMON_CFG;
+
+ proxy->isr.offset = 0x1000;
+ proxy->isr.size = 0x1000;
+ proxy->isr.type = VIRTIO_PCI_CAP_ISR_CFG;
+
+ proxy->device.offset = 0x2000;
+ proxy->device.size = 0x1000;
+ proxy->device.type = VIRTIO_PCI_CAP_DEVICE_CFG;
+
+ proxy->notify.offset = 0x3000;
+ proxy->notify.size =
+ QEMU_VIRTIO_PCI_QUEUE_MEM_MULT * VIRTIO_QUEUE_MAX;
+ proxy->notify.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
+
+ /* subclasses can enforce modern, so do this unconditionally */
+ memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci",
+ 2 * QEMU_VIRTIO_PCI_QUEUE_MEM_MULT *
+ VIRTIO_QUEUE_MAX);
+
+ memory_region_init_alias(&proxy->modern_cfg,
+ OBJECT(proxy),
+ "virtio-pci-cfg",
+ &proxy->modern_bar,
+ 0,
+ memory_region_size(&proxy->modern_bar));
+
+ address_space_init(&proxy->modern_as, &proxy->modern_cfg, "virtio-pci-cfg-as");
+
+ virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy);
+ if (k->realize) {
+ k->realize(proxy, errp);
+ }
+}
+
+static void virtio_pci_exit(PCIDevice *pci_dev)
+{
+ VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
+
+ msix_uninit_exclusive_bar(pci_dev);
+ address_space_destroy(&proxy->modern_as);
+}
+
+static void virtio_pci_reset(DeviceState *qdev)
+{
+ VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
+ VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
+ virtio_pci_stop_ioeventfd(proxy);
+ virtio_bus_reset(bus);
+ msix_unuse_all_vectors(&proxy->pci_dev);
+}
+
+static Property virtio_pci_properties[] = {
+ DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy, flags,
+ VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, false),
+ DEFINE_PROP_BIT("disable-legacy", VirtIOPCIProxy, flags,
+ VIRTIO_PCI_FLAG_DISABLE_LEGACY_BIT, false),
+ DEFINE_PROP_BIT("disable-modern", VirtIOPCIProxy, flags,
+ VIRTIO_PCI_FLAG_DISABLE_MODERN_BIT, true),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ dc->props = virtio_pci_properties;
+ k->realize = virtio_pci_realize;
+ k->exit = virtio_pci_exit;
+ k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+ k->revision = VIRTIO_PCI_ABI_VERSION;
+ k->class_id = PCI_CLASS_OTHERS;
+ dc->reset = virtio_pci_reset;
+}
+
+static const TypeInfo virtio_pci_info = {
+ .name = TYPE_VIRTIO_PCI,
+ .parent = TYPE_PCI_DEVICE,
+ .instance_size = sizeof(VirtIOPCIProxy),
+ .class_init = virtio_pci_class_init,
+ .class_size = sizeof(VirtioPCIClass),
+ .abstract = true,
+};
+
+/* virtio-blk-pci */
+
+static Property virtio_blk_pci_properties[] = {
+ DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
+ DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
+ VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
+ DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+ VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
+ DeviceState *vdev = DEVICE(&dev->vdev);
+
+ qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
+}
+
+static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+ PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+
+ set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ dc->props = virtio_blk_pci_properties;
+ k->realize = virtio_blk_pci_realize;
+ pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+ pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
+ pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
+ pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
+}
+
+static void virtio_blk_pci_instance_init(Object *obj)
+{
+ VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VIRTIO_BLK);
+ object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
+ &error_abort);
+ object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
+ "bootindex", &error_abort);
+}
+
+static const TypeInfo virtio_blk_pci_info = {
+ .name = TYPE_VIRTIO_BLK_PCI,
+ .parent = TYPE_VIRTIO_PCI,
+ .instance_size = sizeof(VirtIOBlkPCI),
+ .instance_init = virtio_blk_pci_instance_init,
+ .class_init = virtio_blk_pci_class_init,
+};
+
+/* virtio-scsi-pci */
+
+static Property virtio_scsi_pci_properties[] = {
+ DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
+ VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
+ DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
+ DEV_NVECTORS_UNSPECIFIED),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+ VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
+ DeviceState *vdev = DEVICE(&dev->vdev);
+ VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
+ DeviceState *proxy = DEVICE(vpci_dev);
+ char *bus_name;
+
+ if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
+ vpci_dev->nvectors = vs->conf.num_queues + 3;
+ }
+
+ /*
+ * For command line compatibility, this sets the virtio-scsi-device bus
+ * name as before.
+ */
+ if (proxy->id) {
+ bus_name = g_strdup_printf("%s.0", proxy->id);
+ virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
+ g_free(bus_name);
+ }
+
+ qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
+}
+
+static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+ PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+
+ k->realize = virtio_scsi_pci_realize;
+ set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ dc->props = virtio_scsi_pci_properties;
+ pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+ pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
+ pcidev_k->revision = 0x00;
+ pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
+}
+
+static void virtio_scsi_pci_instance_init(Object *obj)
+{
+ VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VIRTIO_SCSI);
+ object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread",
+ &error_abort);
+}
+
+static const TypeInfo virtio_scsi_pci_info = {
+ .name = TYPE_VIRTIO_SCSI_PCI,
+ .parent = TYPE_VIRTIO_PCI,
+ .instance_size = sizeof(VirtIOSCSIPCI),
+ .instance_init = virtio_scsi_pci_instance_init,
+ .class_init = virtio_scsi_pci_class_init,
+};
+
+/* vhost-scsi-pci */
+
+#ifdef CONFIG_VHOST_SCSI
+static Property vhost_scsi_pci_properties[] = {
+ DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
+ DEV_NVECTORS_UNSPECIFIED),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+ VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
+ DeviceState *vdev = DEVICE(&dev->vdev);
+ VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
+
+ if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
+ vpci_dev->nvectors = vs->conf.num_queues + 3;
+ }
+
+ qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
+}
+
+static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+ PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+ k->realize = vhost_scsi_pci_realize;
+ set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ dc->props = vhost_scsi_pci_properties;
+ pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+ pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
+ pcidev_k->revision = 0x00;
+ pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
+}
+
+static void vhost_scsi_pci_instance_init(Object *obj)
+{
+ VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VHOST_SCSI);
+ object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
+ "bootindex", &error_abort);
+}
+
+static const TypeInfo vhost_scsi_pci_info = {
+ .name = TYPE_VHOST_SCSI_PCI,
+ .parent = TYPE_VIRTIO_PCI,
+ .instance_size = sizeof(VHostSCSIPCI),
+ .instance_init = vhost_scsi_pci_instance_init,
+ .class_init = vhost_scsi_pci_class_init,
+};
+#endif
+
+/* virtio-balloon-pci */
+
+static Property virtio_balloon_pci_properties[] = {
+ DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_balloon_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+ VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev);
+ DeviceState *vdev = DEVICE(&dev->vdev);
+
+ if (vpci_dev->class_code != PCI_CLASS_OTHERS &&
+ vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
+ vpci_dev->class_code = PCI_CLASS_OTHERS;
+ }
+
+ qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
+}
+
+static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+ PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+ k->realize = virtio_balloon_pci_realize;
+ set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+ dc->props = virtio_balloon_pci_properties;
+ pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+ pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
+ pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
+ pcidev_k->class_id = PCI_CLASS_OTHERS;
+}
+
+static void virtio_balloon_pci_instance_init(Object *obj)
+{
+ VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VIRTIO_BALLOON);
+ object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev),
+ "guest-stats", &error_abort);
+ object_property_add_alias(obj, "guest-stats-polling-interval",
+ OBJECT(&dev->vdev),
+ "guest-stats-polling-interval", &error_abort);
+}
+
+static const TypeInfo virtio_balloon_pci_info = {
+ .name = TYPE_VIRTIO_BALLOON_PCI,
+ .parent = TYPE_VIRTIO_PCI,
+ .instance_size = sizeof(VirtIOBalloonPCI),
+ .instance_init = virtio_balloon_pci_instance_init,
+ .class_init = virtio_balloon_pci_class_init,
+};
+
+/* virtio-serial-pci */
+
+static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+ VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
+ DeviceState *vdev = DEVICE(&dev->vdev);
+ DeviceState *proxy = DEVICE(vpci_dev);
+ char *bus_name;
+
+ if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
+ vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
+ vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */
+ vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
+ }
+
+ /* backwards-compatibility with machines that were created with
+ DEV_NVECTORS_UNSPECIFIED */
+ if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
+ vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
+ }
+
+ /*
+ * For command line compatibility, this sets the virtio-serial-device bus
+ * name as before.
+ */
+ if (proxy->id) {
+ bus_name = g_strdup_printf("%s.0", proxy->id);
+ virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
+ g_free(bus_name);
+ }
+
+ qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
+}
+
+static Property virtio_serial_pci_properties[] = {
+ DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
+ VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
+ DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
+ DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+ PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+ k->realize = virtio_serial_pci_realize;
+ set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
+ dc->props = virtio_serial_pci_properties;
+ pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+ pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
+ pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
+ pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
+}
+
+static void virtio_serial_pci_instance_init(Object *obj)
+{
+ VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VIRTIO_SERIAL);
+}
+
+static const TypeInfo virtio_serial_pci_info = {
+ .name = TYPE_VIRTIO_SERIAL_PCI,
+ .parent = TYPE_VIRTIO_PCI,
+ .instance_size = sizeof(VirtIOSerialPCI),
+ .instance_init = virtio_serial_pci_instance_init,
+ .class_init = virtio_serial_pci_class_init,
+};
+
+/* virtio-net-pci */
+
+static Property virtio_net_properties[] = {
+ DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
+ VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false),
+ DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_net_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+ DeviceState *qdev = DEVICE(vpci_dev);
+ VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev);
+ DeviceState *vdev = DEVICE(&dev->vdev);
+
+ virtio_net_set_netclient_name(&dev->vdev, qdev->id,
+ object_get_typename(OBJECT(qdev)));
+ qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
+}
+
+static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+ VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
+
+ k->romfile = "efi-virtio.rom";
+ k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+ k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
+ k->revision = VIRTIO_PCI_ABI_VERSION;
+ k->class_id = PCI_CLASS_NETWORK_ETHERNET;
+ set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
+ dc->props = virtio_net_properties;
+ vpciklass->realize = virtio_net_pci_realize;
+}
+
+static void virtio_net_pci_instance_init(Object *obj)
+{
+ VirtIONetPCI *dev = VIRTIO_NET_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VIRTIO_NET);
+ object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
+ "bootindex", &error_abort);
+}
+
+static const TypeInfo virtio_net_pci_info = {
+ .name = TYPE_VIRTIO_NET_PCI,
+ .parent = TYPE_VIRTIO_PCI,
+ .instance_size = sizeof(VirtIONetPCI),
+ .instance_init = virtio_net_pci_instance_init,
+ .class_init = virtio_net_pci_class_init,
+};
+
+/* virtio-rng-pci */
+
+static Property virtio_rng_pci_properties[] = {
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+ VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
+ DeviceState *vdev = DEVICE(&vrng->vdev);
+ Error *err = NULL;
+
+ qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+ object_property_set_bool(OBJECT(vdev), true, "realized", &err);
+ if (err) {
+ error_propagate(errp, err);
+ return;
+ }
+
+ object_property_set_link(OBJECT(vrng),
+ OBJECT(vrng->vdev.conf.rng), "rng",
+ NULL);
+}
+
+static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+ PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+
+ k->realize = virtio_rng_pci_realize;
+ set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+ dc->props = virtio_rng_pci_properties;
+
+ pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+ pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
+ pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
+ pcidev_k->class_id = PCI_CLASS_OTHERS;
+}
+
+static void virtio_rng_initfn(Object *obj)
+{
+ VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VIRTIO_RNG);
+ object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), "rng",
+ &error_abort);
+}
+
+static const TypeInfo virtio_rng_pci_info = {
+ .name = TYPE_VIRTIO_RNG_PCI,
+ .parent = TYPE_VIRTIO_PCI,
+ .instance_size = sizeof(VirtIORngPCI),
+ .instance_init = virtio_rng_initfn,
+ .class_init = virtio_rng_pci_class_init,
+};
+
+/* virtio-input-pci */
+
+static Property virtio_input_pci_properties[] = {
+ DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_input_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+ VirtIOInputPCI *vinput = VIRTIO_INPUT_PCI(vpci_dev);
+ DeviceState *vdev = DEVICE(&vinput->vdev);
+
+ qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+ /* force virtio-1.0 */
+ vpci_dev->flags &= ~VIRTIO_PCI_FLAG_DISABLE_MODERN;
+ vpci_dev->flags |= VIRTIO_PCI_FLAG_DISABLE_LEGACY;
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
+}
+
+static void virtio_input_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+ PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+
+ dc->props = virtio_input_pci_properties;
+ k->realize = virtio_input_pci_realize;
+ set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
+
+ pcidev_k->class_id = PCI_CLASS_INPUT_OTHER;
+}
+
+static void virtio_input_hid_kbd_pci_class_init(ObjectClass *klass, void *data)
+{
+ PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+
+ pcidev_k->class_id = PCI_CLASS_INPUT_KEYBOARD;
+}
+
+static void virtio_input_hid_mouse_pci_class_init(ObjectClass *klass,
+ void *data)
+{
+ PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+
+ pcidev_k->class_id = PCI_CLASS_INPUT_MOUSE;
+}
+
+static void virtio_keyboard_initfn(Object *obj)
+{
+ VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VIRTIO_KEYBOARD);
+}
+
+static void virtio_mouse_initfn(Object *obj)
+{
+ VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VIRTIO_MOUSE);
+}
+
+static void virtio_tablet_initfn(Object *obj)
+{
+ VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VIRTIO_TABLET);
+}
+
+static void virtio_host_initfn(Object *obj)
+{
+ VirtIOInputHostPCI *dev = VIRTIO_INPUT_HOST_PCI(obj);
+
+ virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+ TYPE_VIRTIO_INPUT_HOST);
+}
+
+static const TypeInfo virtio_input_pci_info = {
+ .name = TYPE_VIRTIO_INPUT_PCI,
+ .parent = TYPE_VIRTIO_PCI,
+ .instance_size = sizeof(VirtIOInputPCI),
+ .class_init = virtio_input_pci_class_init,
+ .abstract = true,
+};
+
+static const TypeInfo virtio_input_hid_pci_info = {
+ .name = TYPE_VIRTIO_INPUT_HID_PCI,
+ .parent = TYPE_VIRTIO_INPUT_PCI,
+ .instance_size = sizeof(VirtIOInputHIDPCI),
+ .abstract = true,
+};
+
+static const TypeInfo virtio_keyboard_pci_info = {
+ .name = TYPE_VIRTIO_KEYBOARD_PCI,
+ .parent = TYPE_VIRTIO_INPUT_HID_PCI,
+ .class_init = virtio_input_hid_kbd_pci_class_init,
+ .instance_size = sizeof(VirtIOInputHIDPCI),
+ .instance_init = virtio_keyboard_initfn,
+};
+
+static const TypeInfo virtio_mouse_pci_info = {
+ .name = TYPE_VIRTIO_MOUSE_PCI,
+ .parent = TYPE_VIRTIO_INPUT_HID_PCI,
+ .class_init = virtio_input_hid_mouse_pci_class_init,
+ .instance_size = sizeof(VirtIOInputHIDPCI),
+ .instance_init = virtio_mouse_initfn,
+};
+
+static const TypeInfo virtio_tablet_pci_info = {
+ .name = TYPE_VIRTIO_TABLET_PCI,
+ .parent = TYPE_VIRTIO_INPUT_HID_PCI,
+ .instance_size = sizeof(VirtIOInputHIDPCI),
+ .instance_init = virtio_tablet_initfn,
+};
+
+static const TypeInfo virtio_host_pci_info = {
+ .name = TYPE_VIRTIO_INPUT_HOST_PCI,
+ .parent = TYPE_VIRTIO_INPUT_PCI,
+ .instance_size = sizeof(VirtIOInputHostPCI),
+ .instance_init = virtio_host_initfn,
+};
+
+/* virtio-pci-bus */
+
+static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
+ VirtIOPCIProxy *dev)
+{
+ DeviceState *qdev = DEVICE(dev);
+ char virtio_bus_name[] = "virtio-bus";
+
+ qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
+ virtio_bus_name);
+}
+
+static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
+{
+ BusClass *bus_class = BUS_CLASS(klass);
+ VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
+ bus_class->max_dev = 1;
+ k->notify = virtio_pci_notify;
+ k->save_config = virtio_pci_save_config;
+ k->load_config = virtio_pci_load_config;
+ k->save_queue = virtio_pci_save_queue;
+ k->load_queue = virtio_pci_load_queue;
+ k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
+ k->set_host_notifier = virtio_pci_set_host_notifier;
+ k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
+ k->vmstate_change = virtio_pci_vmstate_change;
+ k->device_plugged = virtio_pci_device_plugged;
+ k->device_unplugged = virtio_pci_device_unplugged;
+ k->query_nvectors = virtio_pci_query_nvectors;
+}
+
+static const TypeInfo virtio_pci_bus_info = {
+ .name = TYPE_VIRTIO_PCI_BUS,
+ .parent = TYPE_VIRTIO_BUS,
+ .instance_size = sizeof(VirtioPCIBusState),
+ .class_init = virtio_pci_bus_class_init,
+};
+
+static void virtio_pci_register_types(void)
+{
+ type_register_static(&virtio_rng_pci_info);
+ type_register_static(&virtio_input_pci_info);
+ type_register_static(&virtio_input_hid_pci_info);
+ type_register_static(&virtio_keyboard_pci_info);
+ type_register_static(&virtio_mouse_pci_info);
+ type_register_static(&virtio_tablet_pci_info);
+ type_register_static(&virtio_host_pci_info);
+ type_register_static(&virtio_pci_bus_info);
+ type_register_static(&virtio_pci_info);
+#ifdef CONFIG_VIRTFS
+ type_register_static(&virtio_9p_pci_info);
+#endif
+ type_register_static(&virtio_blk_pci_info);
+ type_register_static(&virtio_scsi_pci_info);
+ type_register_static(&virtio_balloon_pci_info);
+ type_register_static(&virtio_serial_pci_info);
+ type_register_static(&virtio_net_pci_info);
+#ifdef CONFIG_VHOST_SCSI
+ type_register_static(&vhost_scsi_pci_info);
+#endif
+}
+
+type_init(virtio_pci_register_types)
Code Review / kvmfornfv.git / blobdiff