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9824d2a39d
xemu/hw/virtio/virtio-pci.c
Jason Wang 9824d2a39d virtio-pci: introduce pio notification capability for modern device 
We used to use mmio for notification. This could be slow on some arch
(e.g on x86 without EPT). So this patch introduces pio bar and a pio
notification cap for modern device. This ability is enabled through
property "modern-pio-notify" for virtio pci devices and was disabled
by default. Management can enable when it thinks it was needed.

Benchmarks shows almost no obvious difference compared to legacy
device on machines without ept. Thanks Wenli Quan <wquan@redhat.com>
for the benchmarking.

Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-11-12 15:49:32 +02:00

2486 lines
80 KiB
C
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/*
* 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_load_modern_queue_state(VirtIOPCIQueue *vq,
QEMUFile *f)
{
vq->num = qemu_get_be16(f);
vq->enabled = qemu_get_be16(f);
vq->desc[0] = qemu_get_be32(f);
vq->desc[1] = qemu_get_be32(f);
vq->avail[0] = qemu_get_be32(f);
vq->avail[1] = qemu_get_be32(f);
vq->used[0] = qemu_get_be32(f);
vq->used[1] = qemu_get_be32(f);
}
static bool virtio_pci_has_extra_state(DeviceState *d)
{
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
return proxy->flags & VIRTIO_PCI_FLAG_MIGRATE_EXTRA;
}
static int get_virtio_pci_modern_state(QEMUFile *f, void *pv, size_t size)
{
VirtIOPCIProxy *proxy = pv;
int i;
proxy->dfselect = qemu_get_be32(f);
proxy->gfselect = qemu_get_be32(f);
proxy->guest_features[0] = qemu_get_be32(f);
proxy->guest_features[1] = qemu_get_be32(f);
for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
virtio_pci_load_modern_queue_state(&proxy->vqs[i], f);
}
return 0;
}
static void virtio_pci_save_modern_queue_state(VirtIOPCIQueue *vq,
QEMUFile *f)
{
qemu_put_be16(f, vq->num);
qemu_put_be16(f, vq->enabled);
qemu_put_be32(f, vq->desc[0]);
qemu_put_be32(f, vq->desc[1]);
qemu_put_be32(f, vq->avail[0]);
qemu_put_be32(f, vq->avail[1]);
qemu_put_be32(f, vq->used[0]);
qemu_put_be32(f, vq->used[1]);
}
static void put_virtio_pci_modern_state(QEMUFile *f, void *pv, size_t size)
{
VirtIOPCIProxy *proxy = pv;
int i;
qemu_put_be32(f, proxy->dfselect);
qemu_put_be32(f, proxy->gfselect);
qemu_put_be32(f, proxy->guest_features[0]);
qemu_put_be32(f, proxy->guest_features[1]);
for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
virtio_pci_save_modern_queue_state(&proxy->vqs[i], f);
}
}
static const VMStateInfo vmstate_info_virtio_pci_modern_state = {
.name = "virtqueue_state",
.get = get_virtio_pci_modern_state,
.put = put_virtio_pci_modern_state,
};
static bool virtio_pci_modern_state_needed(void *opaque)
{
VirtIOPCIProxy *proxy = opaque;
return !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN);
}
static const VMStateDescription vmstate_virtio_pci_modern_state = {
.name = "virtio_pci/modern_state",
.version_id = 1,
.minimum_version_id = 1,
.needed = &virtio_pci_modern_state_needed,
.fields = (VMStateField[]) {
{
.name = "modern_state",
.version_id = 0,
.field_exists = NULL,
.size = 0,
.info = &vmstate_info_virtio_pci_modern_state,
.flags = VMS_SINGLE,
.offset = 0,
},
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_virtio_pci = {
.name = "virtio_pci",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription*[]) {
&vmstate_virtio_pci_modern_state,
NULL
}
};
static void virtio_pci_save_extra_state(DeviceState *d, QEMUFile *f)
{
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
vmstate_save_state(f, &vmstate_virtio_pci, proxy, NULL);
}
static int virtio_pci_load_extra_state(DeviceState *d, QEMUFile *f)
{
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1);
}
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);
bool fast_mmio = kvm_ioeventfd_any_length_enabled();
bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
MemoryRegion *modern_mr = &proxy->notify.mr;
MemoryRegion *modern_notify_mr = &proxy->notify_pio.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) {
if (fast_mmio) {
memory_region_add_eventfd(modern_mr, modern_addr, 0,
false, n, notifier);
} else {
memory_region_add_eventfd(modern_mr, modern_addr, 2,
false, n, notifier);
}
if (modern_pio) {
memory_region_add_eventfd(modern_notify_mr, 0, 2,
true, n, notifier);
}
}
if (legacy) {
memory_region_add_eventfd(legacy_mr, legacy_addr, 2,
true, n, notifier);
}
} else {
if (modern) {
if (fast_mmio) {
memory_region_del_eventfd(modern_mr, modern_addr, 0,
false, n, notifier);
} else {
memory_region_del_eventfd(modern_mr, modern_addr, 2,
false, n, notifier);
}
if (modern_pio) {
memory_region_del_eventfd(modern_notify_mr, 0, 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, &proxy->pci_dev);
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,
&proxy->pci_dev);
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 void virtio_pci_notify_write_pio(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
VirtIODevice *vdev = opaque;
unsigned queue = val;
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,
};
static const MemoryRegionOps notify_pio_ops = {
.read = virtio_pci_notify_read,
.write = virtio_pci_notify_write_pio,
.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),
&notify_ops,
virtio_bus_get_device(&proxy->bus),
"virtio-pci-notify",
proxy->notify.size);
memory_region_init_io(&proxy->notify_pio.mr, OBJECT(proxy),
&notify_pio_ops,
virtio_bus_get_device(&proxy->bus),
"virtio-pci-notify-pio",
proxy->notify.size);
}
static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy,
VirtIOPCIRegion *region,
struct virtio_pci_cap *cap,
MemoryRegion *mr,
uint8_t bar)
{
memory_region_add_subregion(mr, region->offset, &region->mr);
cap->cfg_type = region->type;
cap->bar = 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_mem_region_map(VirtIOPCIProxy *proxy,
VirtIOPCIRegion *region,
struct virtio_pci_cap *cap)
{
virtio_pci_modern_region_map(proxy, region, cap,
&proxy->modern_bar, proxy->modern_mem_bar);
}
static void virtio_pci_modern_io_region_map(VirtIOPCIProxy *proxy,
VirtIOPCIRegion *region,
struct virtio_pci_cap *cap)
{
virtio_pci_modern_region_map(proxy, region, cap,
&proxy->io_bar, proxy->modern_io_bar);
}
static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy *proxy,
VirtIOPCIRegion *region)
{
memory_region_del_subregion(&proxy->modern_bar,
&region->mr);
}
static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy,
VirtIOPCIRegion *region)
{
memory_region_del_subregion(&proxy->io_bar,
&region->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);
bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
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_notify_cap notify_pio = {
.cap.cap_len = sizeof notify,
.notify_off_multiplier = cpu_to_le32(0x0),
};
struct virtio_pci_cfg_cap *cfg_mask;
virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
virtio_pci_modern_regions_init(proxy);
virtio_pci_modern_mem_region_map(proxy, &proxy->common, &cap);
virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap);
virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap);
virtio_pci_modern_mem_region_map(proxy, &proxy->notify, &notify.cap);
if (modern_pio) {
memory_region_init(&proxy->io_bar, OBJECT(proxy),
"virtio-pci-io", 0x4);
pci_register_bar(&proxy->pci_dev, proxy->modern_io_bar,
PCI_BASE_ADDRESS_SPACE_IO, &proxy->io_bar);
virtio_pci_modern_io_region_map(proxy, &proxy->notify_pio,
&notify_pio.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) {
int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors,
proxy->msix_bar);
if (err) {
/* Notice when a system that supports MSIx can't initialize it. */
if (err != -ENOTSUP) {
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);
size = pow2ceil(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);
bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
virtio_pci_stop_ioeventfd(proxy);
if (modern) {
virtio_pci_modern_mem_region_unmap(proxy, &proxy->common);
virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr);
virtio_pci_modern_mem_region_unmap(proxy, &proxy->device);
virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify);
if (modern_pio) {
virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio);
}
}
}
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_io_bar = 2;
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;
proxy->notify_pio.offset = 0x0;
proxy->notify_pio.size = 0x4;
proxy->notify_pio.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_BIT("migrate-extra", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, true),
DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, false),
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 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);
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 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,
};
#ifdef CONFIG_LINUX
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_host_pci_info = {
.name = TYPE_VIRTIO_INPUT_HOST_PCI,
.parent = TYPE_VIRTIO_INPUT_PCI,
.instance_size = sizeof(VirtIOInputHostPCI),
.instance_init = virtio_host_initfn,
};
#endif
/* 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->save_extra_state = virtio_pci_save_extra_state;
k->load_extra_state = virtio_pci_load_extra_state;
k->has_extra_state = virtio_pci_has_extra_state;
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);
#ifdef CONFIG_LINUX
type_register_static(&virtio_host_pci_info);
#endif
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)
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