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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.
*
*/
#include <inttypes.h>
#include "virtio.h"
#include "virtio-blk.h"
#include "virtio-net.h"
#include "pci.h"
#include "qemu-error.h"
#include "msix.h"
#include "net.h"
#include "loader.h"
#include "kvm.h"
#include "blockdev.h"
/* from Linux's linux/virtio_pci.h */
/* A 32-bit r/o bitmask of the features supported by the host */
#define VIRTIO_PCI_HOST_FEATURES 0
/* A 32-bit r/w bitmask of features activated by the guest */
#define VIRTIO_PCI_GUEST_FEATURES 4
/* A 32-bit r/w PFN for the currently selected queue */
#define VIRTIO_PCI_QUEUE_PFN 8
/* A 16-bit r/o queue size for the currently selected queue */
#define VIRTIO_PCI_QUEUE_NUM 12
/* A 16-bit r/w queue selector */
#define VIRTIO_PCI_QUEUE_SEL 14
/* A 16-bit r/w queue notifier */
#define VIRTIO_PCI_QUEUE_NOTIFY 16
/* An 8-bit device status register. */
#define VIRTIO_PCI_STATUS 18
/* An 8-bit r/o interrupt status register. Reading the value will return the
* current contents of the ISR and will also clear it. This is effectively
* a read-and-acknowledge. */
#define VIRTIO_PCI_ISR 19
/* MSI-X registers: only enabled if MSI-X is enabled. */
/* A 16-bit vector for configuration changes. */
#define VIRTIO_MSI_CONFIG_VECTOR 20
/* A 16-bit vector for selected queue notifications. */
#define VIRTIO_MSI_QUEUE_VECTOR 22
/* Config space size */
#define VIRTIO_PCI_CONFIG_NOMSI 20
#define VIRTIO_PCI_CONFIG_MSI 24
#define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \
VIRTIO_PCI_CONFIG_MSI : \
VIRTIO_PCI_CONFIG_NOMSI)
/* The remaining space is defined by each driver as the per-driver
* configuration space */
#define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \
VIRTIO_PCI_CONFIG_MSI : \
VIRTIO_PCI_CONFIG_NOMSI)
/* Virtio ABI version, if we increment this, we break the guest driver. */
#define VIRTIO_PCI_ABI_VERSION 0
/* How many bits to shift physical queue address written to QUEUE_PFN.
* 12 is historical, and due to x86 page size. */
#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
/* Flags track per-device state like workarounds for quirks in older guests. */
#define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0)
/* Performance improves when virtqueue kick processing is decoupled from the
* vcpu thread using ioeventfd for some devices. */
#define VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT 1
#define VIRTIO_PCI_FLAG_USE_IOEVENTFD (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
/* QEMU doesn't strictly need write barriers since everything runs in
* lock-step. We'll leave the calls to wmb() in though to make it obvious for
* KVM or if kqemu gets SMP support.
*/
#define wmb() do { } while (0)
/* PCI bindings. */
typedef struct {
PCIDevice pci_dev;
VirtIODevice *vdev;
uint32_t flags;
uint32_t addr;
uint32_t class_code;
uint32_t nvectors;
BlockConf block;
NICConf nic;
uint32_t host_features;
#ifdef CONFIG_LINUX
V9fsConf fsconf;
#endif
/* Max. number of ports we can have for a the virtio-serial device */
uint32_t max_virtserial_ports;
virtio_net_conf net;
bool ioeventfd_disabled;
bool ioeventfd_started;
} VirtIOPCIProxy;
/* virtio device */
static void virtio_pci_notify(void *opaque, uint16_t vector)
{
VirtIOPCIProxy *proxy = opaque;
if (msix_enabled(&proxy->pci_dev))
msix_notify(&proxy->pci_dev, vector);
else
qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1);
}
static void virtio_pci_save_config(void * opaque, QEMUFile *f)
{
VirtIOPCIProxy *proxy = opaque;
pci_device_save(&proxy->pci_dev, f);
msix_save(&proxy->pci_dev, f);
if (msix_present(&proxy->pci_dev))
qemu_put_be16(f, proxy->vdev->config_vector);
}
static void virtio_pci_save_queue(void * opaque, int n, QEMUFile *f)
{
VirtIOPCIProxy *proxy = opaque;
if (msix_present(&proxy->pci_dev))
qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n));
}
static int virtio_pci_load_config(void * opaque, QEMUFile *f)
{
VirtIOPCIProxy *proxy = opaque;
int ret;
ret = pci_device_load(&proxy->pci_dev, f);
if (ret) {
return ret;
}
msix_load(&proxy->pci_dev, f);
if (msix_present(&proxy->pci_dev)) {
qemu_get_be16s(f, &proxy->vdev->config_vector);
} else {
proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
}
if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
}
return 0;
}
static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f)
{
VirtIOPCIProxy *proxy = opaque;
uint16_t vector;
if (msix_present(&proxy->pci_dev)) {
qemu_get_be16s(f, &vector);
} else {
vector = VIRTIO_NO_VECTOR;
}
virtio_queue_set_vector(proxy->vdev, n, vector);
if (vector != VIRTIO_NO_VECTOR) {
return msix_vector_use(&proxy->pci_dev, vector);
}
return 0;
}
static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
int n, bool assign)
{
VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
int r;
if (assign) {
r = event_notifier_init(notifier, 1);
if (r < 0) {
error_report("%s: unable to init event notifier: %d",
__func__, r);
return r;
}
r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
n, assign);
if (r < 0) {
error_report("%s: unable to map ioeventfd: %d",
__func__, r);
event_notifier_cleanup(notifier);
}
} else {
r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
n, assign);
if (r < 0) {
error_report("%s: unable to unmap ioeventfd: %d",
__func__, r);
return r;
}
/* Handle the race condition where the guest kicked and we deassigned
* before we got around to handling the kick.
*/
if (event_notifier_test_and_clear(notifier)) {
virtio_queue_notify_vq(vq);
}
event_notifier_cleanup(notifier);
}
return r;
}
static void virtio_pci_host_notifier_read(void *opaque)
{
VirtQueue *vq = opaque;
EventNotifier *n = virtio_queue_get_host_notifier(vq);
if (event_notifier_test_and_clear(n)) {
virtio_queue_notify_vq(vq);
}
}
static void virtio_pci_set_host_notifier_fd_handler(VirtIOPCIProxy *proxy,
int n, bool assign)
{
VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
if (assign) {
qemu_set_fd_handler(event_notifier_get_fd(notifier),
virtio_pci_host_notifier_read, NULL, vq);
} else {
qemu_set_fd_handler(event_notifier_get_fd(notifier),
NULL, NULL, NULL);
}
}
static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
{
int n, r;
if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) ||
proxy->ioeventfd_disabled ||
proxy->ioeventfd_started) {
return;
}
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
if (!virtio_queue_get_num(proxy->vdev, n)) {
continue;
}
r = virtio_pci_set_host_notifier_internal(proxy, n, true);
if (r < 0) {
goto assign_error;
}
virtio_pci_set_host_notifier_fd_handler(proxy, n, true);
}
proxy->ioeventfd_started = true;
return;
assign_error:
while (--n >= 0) {
if (!virtio_queue_get_num(proxy->vdev, n)) {
continue;
}
virtio_pci_set_host_notifier_fd_handler(proxy, n, false);
r = virtio_pci_set_host_notifier_internal(proxy, n, 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)
{
int r;
int n;
if (!proxy->ioeventfd_started) {
return;
}
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
if (!virtio_queue_get_num(proxy->vdev, n)) {
continue;
}
virtio_pci_set_host_notifier_fd_handler(proxy, n, false);
r = virtio_pci_set_host_notifier_internal(proxy, n, false);
assert(r >= 0);
}
proxy->ioeventfd_started = false;
}
static void virtio_pci_reset(DeviceState *d)
{
VirtIOPCIProxy *proxy = container_of(d, VirtIOPCIProxy, pci_dev.qdev);
virtio_pci_stop_ioeventfd(proxy);
virtio_reset(proxy->vdev);
msix_reset(&proxy->pci_dev);
proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
}
static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
VirtIOPCIProxy *proxy = opaque;
VirtIODevice *vdev = proxy->vdev;
target_phys_addr_t 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)) {
if (vdev->bad_features)
val = proxy->host_features & vdev->bad_features(vdev);
else
val = 0;
}
if (vdev->set_features)
vdev->set_features(vdev, val);
vdev->guest_features = val;
break;
case VIRTIO_PCI_QUEUE_PFN:
pa = (target_phys_addr_t)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
if (pa == 0) {
virtio_pci_stop_ioeventfd(proxy);
virtio_reset(proxy->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_PCI_QUEUE_MAX)
vdev->queue_sel = val;
break;
case VIRTIO_PCI_QUEUE_NOTIFY:
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(proxy->vdev);
msix_unuse_all_vectors(&proxy->pci_dev);
}
/* Linux before 2.6.34 sets the device as OK without enabling
the PCI device bus master bit. In this case we need to disable
some safety checks. */
if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
}
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 = proxy->vdev;
uint32_t ret = 0xFFFFFFFF;
switch (addr) {
case VIRTIO_PCI_HOST_FEATURES:
ret = proxy->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;
qemu_set_irq(proxy->pci_dev.irq[0], 0);
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 uint32_t virtio_pci_config_readb(void *opaque, uint32_t addr)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
addr -= proxy->addr;
if (addr < config)
return virtio_ioport_read(proxy, addr);
addr -= config;
return virtio_config_readb(proxy->vdev, addr);
}
static uint32_t virtio_pci_config_readw(void *opaque, uint32_t addr)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
addr -= proxy->addr;
if (addr < config)
return virtio_ioport_read(proxy, addr);
addr -= config;
return virtio_config_readw(proxy->vdev, addr);
}
static uint32_t virtio_pci_config_readl(void *opaque, uint32_t addr)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
addr -= proxy->addr;
if (addr < config)
return virtio_ioport_read(proxy, addr);
addr -= config;
return virtio_config_readl(proxy->vdev, addr);
}
static void virtio_pci_config_writeb(void *opaque, uint32_t addr, uint32_t val)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
addr -= proxy->addr;
if (addr < config) {
virtio_ioport_write(proxy, addr, val);
return;
}
addr -= config;
virtio_config_writeb(proxy->vdev, addr, val);
}
static void virtio_pci_config_writew(void *opaque, uint32_t addr, uint32_t val)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
addr -= proxy->addr;
if (addr < config) {
virtio_ioport_write(proxy, addr, val);
return;
}
addr -= config;
virtio_config_writew(proxy->vdev, addr, val);
}
static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
addr -= proxy->addr;
if (addr < config) {
virtio_ioport_write(proxy, addr, val);
return;
}
addr -= config;
virtio_config_writel(proxy->vdev, addr, val);
}
static void virtio_map(PCIDevice *pci_dev, int region_num,
pcibus_t addr, pcibus_t size, int type)
{
VirtIOPCIProxy *proxy = container_of(pci_dev, VirtIOPCIProxy, pci_dev);
VirtIODevice *vdev = proxy->vdev;
unsigned config_len = VIRTIO_PCI_REGION_SIZE(pci_dev) + vdev->config_len;
proxy->addr = addr;
register_ioport_write(addr, config_len, 1, virtio_pci_config_writeb, proxy);
register_ioport_write(addr, config_len, 2, virtio_pci_config_writew, proxy);
register_ioport_write(addr, config_len, 4, virtio_pci_config_writel, proxy);
register_ioport_read(addr, config_len, 1, virtio_pci_config_readb, proxy);
register_ioport_read(addr, config_len, 2, virtio_pci_config_readw, proxy);
register_ioport_read(addr, config_len, 4, virtio_pci_config_readl, proxy);
if (vdev->config_len)
vdev->get_config(vdev, vdev->config);
}
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);
if (PCI_COMMAND == address) {
if (!(val & PCI_COMMAND_MASTER)) {
if (!(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) {
virtio_pci_stop_ioeventfd(proxy);
virtio_set_status(proxy->vdev,
proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
}
}
}
pci_default_write_config(pci_dev, address, val, len);
msix_write_config(pci_dev, address, val, len);
}
static unsigned virtio_pci_get_features(void *opaque)
{
VirtIOPCIProxy *proxy = opaque;
return proxy->host_features;
}
static void virtio_pci_guest_notifier_read(void *opaque)
{
VirtQueue *vq = opaque;
EventNotifier *n = virtio_queue_get_guest_notifier(vq);
if (event_notifier_test_and_clear(n)) {
virtio_irq(vq);
}
}
static int virtio_pci_mask_vq(PCIDevice *dev, unsigned vector,
VirtQueue *vq, int masked)
{
#ifdef CONFIG_KVM
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
int r = kvm_set_irqfd(dev->msix_irq_entries[vector].gsi,
event_notifier_get_fd(notifier),
!masked);
if (r < 0) {
return (r == -ENOSYS) ? 0 : r;
}
if (masked) {
qemu_set_fd_handler(event_notifier_get_fd(notifier),
virtio_pci_guest_notifier_read, NULL, vq);
} else {
qemu_set_fd_handler(event_notifier_get_fd(notifier),
NULL, NULL, NULL);
}
return 0;
#else
return -ENOSYS;
#endif
}
static int virtio_pci_mask_notifier(PCIDevice *dev, unsigned vector,
int masked)
{
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
VirtIODevice *vdev = proxy->vdev;
int r, n;
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
if (!virtio_queue_get_num(vdev, n)) {
break;
}
if (virtio_queue_vector(vdev, n) != vector) {
continue;
}
r = virtio_pci_mask_vq(dev, vector, virtio_get_queue(vdev, n), masked);
if (r < 0) {
goto undo;
}
}
return 0;
undo:
while (--n >= 0) {
if (virtio_queue_vector(vdev, n) != vector) {
continue;
}
virtio_pci_mask_vq(dev, vector, virtio_get_queue(vdev, n), !masked);
}
return r;
}
static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign)
{
VirtIOPCIProxy *proxy = opaque;
VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
if (assign) {
int r = event_notifier_init(notifier, 0);
if (r < 0) {
return r;
}
qemu_set_fd_handler(event_notifier_get_fd(notifier),
virtio_pci_guest_notifier_read, NULL, vq);
} else {
qemu_set_fd_handler(event_notifier_get_fd(notifier),
NULL, NULL, NULL);
/* Test and clear notifier before closing it,
* in case poll callback didn't have time to run. */
virtio_pci_guest_notifier_read(vq);
event_notifier_cleanup(notifier);
}
return 0;
}
static bool virtio_pci_query_guest_notifiers(void *opaque)
{
VirtIOPCIProxy *proxy = opaque;
return msix_enabled(&proxy->pci_dev);
}
static int virtio_pci_set_guest_notifiers(void *opaque, bool assign)
{
VirtIOPCIProxy *proxy = opaque;
VirtIODevice *vdev = proxy->vdev;
int r, n;
/* Must unset mask notifier while guest notifier
* is still assigned */
if (!assign) {
r = msix_unset_mask_notifier(&proxy->pci_dev);
assert(r >= 0);
}
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
if (!virtio_queue_get_num(vdev, n)) {
break;
}
r = virtio_pci_set_guest_notifier(opaque, n, assign);
if (r < 0) {
goto assign_error;
}
}
/* Must set mask notifier after guest notifier
* has been assigned */
if (assign) {
r = msix_set_mask_notifier(&proxy->pci_dev,
virtio_pci_mask_notifier);
if (r < 0) {
goto assign_error;
}
}
return 0;
assign_error:
/* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
if (assign) {
msix_unset_mask_notifier(&proxy->pci_dev);
}
while (--n >= 0) {
virtio_pci_set_guest_notifier(opaque, n, !assign);
}
if (!assign) {
msix_set_mask_notifier(&proxy->pci_dev,
virtio_pci_mask_notifier);
}
return r;
}
static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign)
{
VirtIOPCIProxy *proxy = opaque;
/* 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);
}
static void virtio_pci_vmstate_change(void *opaque, bool running)
{
VirtIOPCIProxy *proxy = opaque;
if (running) {
/* Try to find out if the guest has bus master disabled, but is
in ready state. Then we have a buggy guest OS. */
if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
}
virtio_pci_start_ioeventfd(proxy);
} else {
virtio_pci_stop_ioeventfd(proxy);
}
}
static const VirtIOBindings virtio_pci_bindings = {
.notify = virtio_pci_notify,
.save_config = virtio_pci_save_config,
.load_config = virtio_pci_load_config,
.save_queue = virtio_pci_save_queue,
.load_queue = virtio_pci_load_queue,
.get_features = virtio_pci_get_features,
.query_guest_notifiers = virtio_pci_query_guest_notifiers,
.set_host_notifier = virtio_pci_set_host_notifier,
.set_guest_notifiers = virtio_pci_set_guest_notifiers,
.vmstate_change = virtio_pci_vmstate_change,
};
static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev,
uint16_t vendor, uint16_t device,
uint16_t class_code, uint8_t pif)
{
uint8_t *config;
uint32_t size;
proxy->vdev = vdev;
config = proxy->pci_dev.config;
pci_config_set_vendor_id(config, vendor);
pci_config_set_device_id(config, device);
config[0x08] = VIRTIO_PCI_ABI_VERSION;
config[0x09] = pif;
pci_config_set_class(config, class_code);
config[0x2c] = vendor & 0xFF;
config[0x2d] = (vendor >> 8) & 0xFF;
config[0x2e] = vdev->device_id & 0xFF;
config[0x2f] = (vdev->device_id >> 8) & 0xFF;
config[0x3d] = 1;
if (vdev->nvectors && !msix_init(&proxy->pci_dev, vdev->nvectors, 1, 0)) {
pci_register_bar(&proxy->pci_dev, 1,
msix_bar_size(&proxy->pci_dev),
PCI_BASE_ADDRESS_SPACE_MEMORY,
msix_mmio_map);
} else
vdev->nvectors = 0;
proxy->pci_dev.config_write = virtio_write_config;
size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len;
if (size & (size-1))
size = 1 << qemu_fls(size);
pci_register_bar(&proxy->pci_dev, 0, size, PCI_BASE_ADDRESS_SPACE_IO,
virtio_map);
if (!kvm_has_many_ioeventfds()) {
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
}
virtio_bind_device(vdev, &virtio_pci_bindings, proxy);
proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
proxy->host_features = vdev->get_features(vdev, proxy->host_features);
}
static int virtio_blk_init_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
VirtIODevice *vdev;
if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
proxy->class_code != PCI_CLASS_STORAGE_OTHER)
proxy->class_code = PCI_CLASS_STORAGE_SCSI;
vdev = virtio_blk_init(&pci_dev->qdev, &proxy->block);
if (!vdev) {
return -1;
}
vdev->nvectors = proxy->nvectors;
virtio_init_pci(proxy, vdev,
PCI_VENDOR_ID_REDHAT_QUMRANET,
PCI_DEVICE_ID_VIRTIO_BLOCK,
proxy->class_code, 0x00);
/* make the actual value visible */
proxy->nvectors = vdev->nvectors;
return 0;
}
static int virtio_exit_pci(PCIDevice *pci_dev)
{
return msix_uninit(pci_dev);
}
static int virtio_blk_exit_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
virtio_pci_stop_ioeventfd(proxy);
virtio_blk_exit(proxy->vdev);
blockdev_mark_auto_del(proxy->block.bs);
return virtio_exit_pci(pci_dev);
}
static int virtio_serial_init_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
VirtIODevice *vdev;
if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
proxy->class_code != PCI_CLASS_OTHERS) /* qemu-kvm */
proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER;
vdev = virtio_serial_init(&pci_dev->qdev, proxy->max_virtserial_ports);
if (!vdev) {
return -1;
}
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
? proxy->max_virtserial_ports + 1
: proxy->nvectors;
virtio_init_pci(proxy, vdev,
PCI_VENDOR_ID_REDHAT_QUMRANET,
PCI_DEVICE_ID_VIRTIO_CONSOLE,
proxy->class_code, 0x00);
proxy->nvectors = vdev->nvectors;
return 0;
}
static int virtio_serial_exit_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
virtio_serial_exit(proxy->vdev);
return virtio_exit_pci(pci_dev);
}
static int virtio_net_init_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
VirtIODevice *vdev;
vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net);
vdev->nvectors = proxy->nvectors;
virtio_init_pci(proxy, vdev,
PCI_VENDOR_ID_REDHAT_QUMRANET,
PCI_DEVICE_ID_VIRTIO_NET,
PCI_CLASS_NETWORK_ETHERNET,
0x00);
/* make the actual value visible */
proxy->nvectors = vdev->nvectors;
return 0;
}
static int virtio_net_exit_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
virtio_pci_stop_ioeventfd(proxy);
virtio_net_exit(proxy->vdev);
return virtio_exit_pci(pci_dev);
}
static int virtio_balloon_init_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
VirtIODevice *vdev;
vdev = virtio_balloon_init(&pci_dev->qdev);
virtio_init_pci(proxy, vdev,
PCI_VENDOR_ID_REDHAT_QUMRANET,
PCI_DEVICE_ID_VIRTIO_BALLOON,
PCI_CLASS_MEMORY_RAM,
0x00);
return 0;
}
#ifdef CONFIG_VIRTFS
static int virtio_9p_init_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
VirtIODevice *vdev;
vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
vdev->nvectors = proxy->nvectors;
virtio_init_pci(proxy, vdev,
PCI_VENDOR_ID_REDHAT_QUMRANET,
0x1009,
0x2,
0x00);
/* make the actual value visible */
proxy->nvectors = vdev->nvectors;
return 0;
}
#endif
static PCIDeviceInfo virtio_info[] = {
{
.qdev.name = "virtio-blk-pci",
.qdev.alias = "virtio-blk",
.qdev.size = sizeof(VirtIOPCIProxy),
.init = virtio_blk_init_pci,
.exit = virtio_blk_exit_pci,
.qdev.props = (Property[]) {
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block),
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
DEFINE_PROP_END_OF_LIST(),
},
.qdev.reset = virtio_pci_reset,
},{
.qdev.name = "virtio-net-pci",
.qdev.size = sizeof(VirtIOPCIProxy),
.init = virtio_net_init_pci,
.exit = virtio_net_exit_pci,
.romfile = "pxe-virtio.bin",
.qdev.props = (Property[]) {
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false),
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic),
DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy,
net.txtimer, TX_TIMER_INTERVAL),
DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy,
net.txburst, TX_BURST),
DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
DEFINE_PROP_END_OF_LIST(),
},
.qdev.reset = virtio_pci_reset,
},{
.qdev.name = "virtio-serial-pci",
.qdev.alias = "virtio-serial",
.qdev.size = sizeof(VirtIOPCIProxy),
.init = virtio_serial_init_pci,
.exit = virtio_serial_exit_pci,
.qdev.props = (Property[]) {
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
DEV_NVECTORS_UNSPECIFIED),
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, max_virtserial_ports,
31),
DEFINE_PROP_END_OF_LIST(),
},
.qdev.reset = virtio_pci_reset,
},{
.qdev.name = "virtio-balloon-pci",
.qdev.size = sizeof(VirtIOPCIProxy),
.init = virtio_balloon_init_pci,
.exit = virtio_exit_pci,
.qdev.props = (Property[]) {
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
DEFINE_PROP_END_OF_LIST(),
},
.qdev.reset = virtio_pci_reset,
},{
#ifdef CONFIG_VIRTFS
.qdev.name = "virtio-9p-pci",
.qdev.size = sizeof(VirtIOPCIProxy),
.init = virtio_9p_init_pci,
.qdev.props = (Property[]) {
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
DEFINE_PROP_END_OF_LIST(),
},
}, {
#endif
/* end of list */
}
};
static void virtio_pci_register_devices(void)
{
pci_qdev_register_many(virtio_info);
}
device_init(virtio_pci_register_devices)
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