qemu/0005-virtio-pci-remove-vdev-field.patch

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From 3dfc39e3dcdf006d3aef8b8be1f3947f9393b90f Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri, 20 Sep 2013 16:57:51 +0200
Subject: [PATCH] virtio-pci: remove vdev field
The vdev field is complicated to synchronize. Just access the
BusState's list of children.
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
hw/s390x/virtio-ccw.h | 1 -
hw/virtio/virtio-pci.c | 107 +++++++++++++++++++++++++++++--------------------
hw/virtio/virtio-pci.h | 1 -
3 files changed, 63 insertions(+), 46 deletions(-)
diff --git a/hw/s390x/virtio-ccw.h b/hw/s390x/virtio-ccw.h
index 96d6f5d..00932c7 100644
--- a/hw/s390x/virtio-ccw.h
+++ b/hw/s390x/virtio-ccw.h
@@ -77,7 +77,6 @@ typedef struct VirtIOCCWDeviceClass {
struct VirtioCcwDevice {
DeviceState parent_obj;
SubchDev *sch;
- VirtIODevice *vdev;
char *bus_id;
uint32_t host_features[VIRTIO_CCW_FEATURE_SIZE];
VirtioBusState bus;
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
2013-11-20 23:32:50 +00:00
index 76b7652..be18e92 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
2013-11-20 23:32:50 +00:00
@@ -113,31 +113,39 @@ static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d)
static void virtio_pci_notify(DeviceState *d, uint16_t vector)
{
VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+
if (msix_enabled(&proxy->pci_dev))
msix_notify(&proxy->pci_dev, vector);
else
2013-11-20 23:32:50 +00:00
- pci_set_irq(&proxy->pci_dev, proxy->vdev->isr & 1);
+ 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, proxy->vdev->config_vector);
+ qemu_put_be16(f, vdev->config_vector);
}
static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
{
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+
if (msix_present(&proxy->pci_dev))
- qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n));
+ 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) {
2013-11-20 23:32:50 +00:00
@@ -146,12 +154,12 @@ static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
msix_unuse_all_vectors(&proxy->pci_dev);
msix_load(&proxy->pci_dev, f);
if (msix_present(&proxy->pci_dev)) {
- qemu_get_be16s(f, &proxy->vdev->config_vector);
+ qemu_get_be16s(f, &vdev->config_vector);
} else {
- proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
+ 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);
+ if (vdev->config_vector != VIRTIO_NO_VECTOR) {
+ return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
}
return 0;
}
2013-11-20 23:32:50 +00:00
@@ -159,13 +167,15 @@ static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
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(proxy->vdev, n, vector);
+ virtio_queue_set_vector(vdev, n, vector);
if (vector != VIRTIO_NO_VECTOR) {
return msix_vector_use(&proxy->pci_dev, vector);
}
2013-11-20 23:32:50 +00:00
@@ -175,7 +185,8 @@ static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
int n, bool assign, bool set_handler)
{
- VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+ VirtQueue *vq = virtio_get_queue(vdev, n);
EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
int r = 0;
2013-11-20 23:32:50 +00:00
@@ -200,6 +211,7 @@ static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
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) ||
2013-11-20 23:32:50 +00:00
@@ -209,7 +221,7 @@ static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
}
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
- if (!virtio_queue_get_num(proxy->vdev, n)) {
+ if (!virtio_queue_get_num(vdev, n)) {
continue;
}
2013-11-20 23:32:50 +00:00
@@ -223,7 +235,7 @@ static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
assign_error:
while (--n >= 0) {
- if (!virtio_queue_get_num(proxy->vdev, n)) {
+ if (!virtio_queue_get_num(vdev, n)) {
continue;
}
2013-11-20 23:32:50 +00:00
@@ -236,6 +248,7 @@ assign_error:
static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
{
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
int r;
int n;
2013-11-20 23:32:50 +00:00
@@ -244,7 +257,7 @@ static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
}
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
- if (!virtio_queue_get_num(proxy->vdev, n)) {
+ if (!virtio_queue_get_num(vdev, n)) {
continue;
}
2013-11-20 23:32:50 +00:00
@@ -257,7 +270,7 @@ static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
VirtIOPCIProxy *proxy = opaque;
- VirtIODevice *vdev = proxy->vdev;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
hwaddr pa;
switch (addr) {
2013-11-20 23:32:50 +00:00
@@ -272,7 +285,7 @@ static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
if (pa == 0) {
virtio_pci_stop_ioeventfd(proxy);
- virtio_reset(proxy->vdev);
+ virtio_reset(vdev);
msix_unuse_all_vectors(&proxy->pci_dev);
}
else
2013-11-20 23:32:50 +00:00
@@ -299,7 +312,7 @@ static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
}
if (vdev->status == 0) {
- virtio_reset(proxy->vdev);
+ virtio_reset(vdev);
msix_unuse_all_vectors(&proxy->pci_dev);
}
2013-11-20 23:32:50 +00:00
@@ -335,7 +348,7 @@ static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
{
- VirtIODevice *vdev = proxy->vdev;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
uint32_t ret = 0xFFFFFFFF;
switch (addr) {
2013-11-20 23:32:50 +00:00
@@ -381,6 +394,7 @@ 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(&proxy->pci_dev);
uint64_t val = 0;
if (addr < config) {
2013-11-20 23:32:50 +00:00
@@ -390,16 +404,16 @@ static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
switch (size) {
case 1:
- val = virtio_config_readb(proxy->vdev, addr);
+ val = virtio_config_readb(vdev, addr);
break;
case 2:
- val = virtio_config_readw(proxy->vdev, addr);
+ val = virtio_config_readw(vdev, addr);
if (virtio_is_big_endian()) {
val = bswap16(val);
}
break;
case 4:
- val = virtio_config_readl(proxy->vdev, addr);
+ val = virtio_config_readl(vdev, addr);
if (virtio_is_big_endian()) {
val = bswap32(val);
}
2013-11-20 23:32:50 +00:00
@@ -413,6 +427,7 @@ static void virtio_pci_config_write(void *opaque, hwaddr addr,
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
if (addr < config) {
virtio_ioport_write(proxy, addr, val);
return;
2013-11-20 23:32:50 +00:00
@@ -424,19 +439,19 @@ static void virtio_pci_config_write(void *opaque, hwaddr addr,
*/
switch (size) {
case 1:
- virtio_config_writeb(proxy->vdev, addr, val);
+ virtio_config_writeb(vdev, addr, val);
break;
case 2:
if (virtio_is_big_endian()) {
val = bswap16(val);
}
- virtio_config_writew(proxy->vdev, addr, val);
+ virtio_config_writew(vdev, addr, val);
break;
case 4:
if (virtio_is_big_endian()) {
val = bswap32(val);
}
- virtio_config_writel(proxy->vdev, addr, val);
+ virtio_config_writel(vdev, addr, val);
break;
}
}
2013-11-20 23:32:50 +00:00
@@ -455,6 +470,7 @@ 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);
pci_default_write_config(pci_dev, address, val, len);
2013-11-20 23:32:50 +00:00
@@ -462,8 +478,7 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
!(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) &&
!(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);
+ virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
}
}
2013-11-20 23:32:50 +00:00
@@ -506,7 +521,8 @@ static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
unsigned int vector)
{
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
- VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no);
+ 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;
2013-11-20 23:32:50 +00:00
ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, NULL, irqfd->virq);
@@ -517,7 +533,8 @@ static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
unsigned int queue_no,
unsigned int vector)
{
- VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no);
+ 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;
2013-11-20 23:32:50 +00:00
@@ -529,7 +546,7 @@ static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
{
PCIDevice *dev = &proxy->pci_dev;
- VirtIODevice *vdev = proxy->vdev;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
unsigned int vector;
int ret, queue_no;
2013-11-20 23:32:50 +00:00
@@ -578,7 +595,7 @@ undo:
static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
{
PCIDevice *dev = &proxy->pci_dev;
- VirtIODevice *vdev = proxy->vdev;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
unsigned int vector;
int queue_no;
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
2013-11-20 23:32:50 +00:00
@@ -606,8 +623,9 @@ static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
unsigned int vector,
MSIMessage msg)
{
- VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(proxy->vdev);
- VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no);
+ 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;
2013-11-20 23:32:50 +00:00
@@ -626,10 +644,10 @@ static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
* Otherwise, set it up now.
*/
if (k->guest_notifier_mask) {
- k->guest_notifier_mask(proxy->vdev, queue_no, false);
+ k->guest_notifier_mask(vdev, queue_no, false);
/* Test after unmasking to avoid losing events. */
if (k->guest_notifier_pending &&
- k->guest_notifier_pending(proxy->vdev, queue_no)) {
+ k->guest_notifier_pending(vdev, queue_no)) {
event_notifier_set(n);
}
} else {
2013-11-20 23:32:50 +00:00
@@ -642,13 +660,14 @@ static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
unsigned int queue_no,
unsigned int vector)
{
- VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(proxy->vdev);
+ 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(proxy->vdev, queue_no, true);
+ k->guest_notifier_mask(vdev, queue_no, true);
} else {
kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
}
2013-11-20 23:32:50 +00:00
@@ -658,7 +677,7 @@ static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
MSIMessage msg)
{
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
- VirtIODevice *vdev = proxy->vdev;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
int ret, queue_no;
for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
2013-11-20 23:32:50 +00:00
@@ -688,7 +707,7 @@ undo:
static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
{
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
- VirtIODevice *vdev = proxy->vdev;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
int queue_no;
for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
2013-11-20 23:32:50 +00:00
@@ -707,7 +726,7 @@ static void virtio_pci_vector_poll(PCIDevice *dev,
unsigned int vector_end)
{
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
- VirtIODevice *vdev = proxy->vdev;
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
int queue_no;
unsigned int vector;
2013-11-20 23:32:50 +00:00
@@ -739,8 +758,9 @@ static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
bool with_irqfd)
{
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
- VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(proxy->vdev);
- VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
+ 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) {
2013-11-20 23:32:50 +00:00
@@ -755,7 +775,7 @@ static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
}
if (!msix_enabled(&proxy->pci_dev) && vdc->guest_notifier_mask) {
- vdc->guest_notifier_mask(proxy->vdev, n, !assign);
+ vdc->guest_notifier_mask(vdev, n, !assign);
}
return 0;
2013-11-20 23:32:50 +00:00
@@ -770,7 +790,7 @@ static bool virtio_pci_query_guest_notifiers(DeviceState *d)
static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
{
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
- VirtIODevice *vdev = proxy->vdev;
+ 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) &&
2013-11-20 23:32:50 +00:00
@@ -864,11 +884,12 @@ static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign)
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) {
/* 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) &&
+ if ((vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
}
2013-11-20 23:32:50 +00:00
@@ -943,8 +964,6 @@ static void virtio_pci_device_plugged(DeviceState *d)
uint8_t *config;
uint32_t size;
- proxy->vdev = virtio_bus_get_device(bus);
-
config = proxy->pci_dev.config;
if (proxy->class_code) {
pci_config_set_class(config, proxy->class_code);
diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h
index 917bcc5..dc332ae 100644
--- a/hw/virtio/virtio-pci.h
+++ b/hw/virtio/virtio-pci.h
@@ -82,7 +82,6 @@ typedef struct VirtioPCIClass {
struct VirtIOPCIProxy {
PCIDevice pci_dev;
- VirtIODevice *vdev;
MemoryRegion bar;
uint32_t flags;
uint32_t class_code;