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pc,virtio,pci: bugfixes

Browse source 
Fixes all over the place.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

pc,virtio,pci: bugfixes

Fixes all over the place.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Thu 01 Apr 2021 17:22:03 BST
# gpg:                using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg:                issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream:
  pci: sprinkle assert in PCI pin number
  isa/v582c686: Reinitialize ACPI PM device on reset
  vt82c686.c: don't raise SCI when PCI_INTERRUPT_PIN isn't setup
  acpi/piix4: reinitialize acpi PM device on reset
  virtio-pci: remove explicit initialization of val
  virtio-pci: add check for vdev in virtio_pci_isr_read
  vhost-user-blk: add immediate cleanup on shutdown
  vhost-user-blk: perform immediate cleanup if disconnect on initialization
  vhost-user-blk: use different event handlers on initialization

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2021-04-02 11:53:18 +01:00
commit 11577d85b1
5 changed files with 87 additions and 36 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
hw/acpi/piix4.c
View file

@ -326,6 +326,13 @@ static void piix4_pm_reset(DeviceState *dev)
/* Mark SMM as already inited (until KVM supports SMM). */
pci_conf[0x5B] = 0x02;
}
acpi_pm1_evt_reset(&s->ar);
acpi_pm1_cnt_reset(&s->ar);
acpi_pm_tmr_reset(&s->ar);
acpi_gpe_reset(&s->ar);
acpi_update_sci(&s->ar, s->irq);
pm_io_space_update(s);
acpi_pcihp_reset(&s->acpi_pci_hotplug, !s->use_acpi_root_pci_hotplug);
}

79
hw/block/vhost-user-blk.c
View file

@ -362,7 +362,18 @@ static void vhost_user_blk_disconnect(DeviceState *dev)
vhost_dev_cleanup(&s->dev);
}
static void vhost_user_blk_event(void *opaque, QEMUChrEvent event);
static void vhost_user_blk_event(void *opaque, QEMUChrEvent event,
bool realized);
static void vhost_user_blk_event_realize(void *opaque, QEMUChrEvent event)
{
vhost_user_blk_event(opaque, event, false);
}
static void vhost_user_blk_event_oper(void *opaque, QEMUChrEvent event)
{
vhost_user_blk_event(opaque, event, true);
}
static void vhost_user_blk_chr_closed_bh(void *opaque)
{
@ -371,11 +382,12 @@ static void vhost_user_blk_chr_closed_bh(void *opaque)
VHostUserBlk *s = VHOST_USER_BLK(vdev);
vhost_user_blk_disconnect(dev);
qemu_chr_fe_set_handlers(&s->chardev, NULL, NULL, vhost_user_blk_event,
NULL, opaque, NULL, true);
qemu_chr_fe_set_handlers(&s->chardev, NULL, NULL,
vhost_user_blk_event_oper, NULL, opaque, NULL, true);
}
static void vhost_user_blk_event(void *opaque, QEMUChrEvent event)
static void vhost_user_blk_event(void *opaque, QEMUChrEvent event,
bool realized)
{
DeviceState *dev = opaque;
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
@ -390,38 +402,38 @@ static void vhost_user_blk_event(void *opaque, QEMUChrEvent event)
break;
case CHR_EVENT_CLOSED:
/*
* A close event may happen during a read/write, but vhost
* code assumes the vhost_dev remains setup, so delay the
* stop & clear. There are two possible paths to hit this
* disconnect event:
* 1. When VM is in the RUN_STATE_PRELAUNCH state. The
* vhost_user_blk_device_realize() is a caller.
* 2. In tha main loop phase after VM start.
*
* For p2 the disconnect event will be delayed. We can't
* do the same for p1, because we are not running the loop
* at this moment. So just skip this step and perform
* disconnect in the caller function.
*
* TODO: maybe it is a good idea to make the same fix
* for other vhost-user devices.
* Closing the connection should happen differently on device
* initialization and operation stages.
* On initalization, we want to re-start vhost_dev initialization
* from the very beginning right away when the connection is closed,
* so we clean up vhost_dev on each connection closing.
* On operation, we want to postpone vhost_dev cleanup to let the
* other code perform its own cleanup sequence using vhost_dev data
* (e.g. vhost_dev_set_log).
*/
if (runstate_is_running()) {
if (realized && !runstate_check(RUN_STATE_SHUTDOWN)) {
/*
* A close event may happen during a read/write, but vhost
* code assumes the vhost_dev remains setup, so delay the
* stop & clear.
*/
AioContext *ctx = qemu_get_current_aio_context();
qemu_chr_fe_set_handlers(&s->chardev, NULL, NULL, NULL, NULL,
NULL, NULL, false);
aio_bh_schedule_oneshot(ctx, vhost_user_blk_chr_closed_bh, opaque);
}
/*
* Move vhost device to the stopped state. The vhost-user device
* will be clean up and disconnected in BH. This can be useful in
* the vhost migration code. If disconnect was caught there is an
* option for the general vhost code to get the dev state without
* knowing its type (in this case vhost-user).
*/
s->dev.started = false;
/*
* Move vhost device to the stopped state. The vhost-user device
* will be clean up and disconnected in BH. This can be useful in
* the vhost migration code. If disconnect was caught there is an
* option for the general vhost code to get the dev state without
* knowing its type (in this case vhost-user).
*/
s->dev.started = false;
} else {
vhost_user_blk_disconnect(dev);
}
break;
case CHR_EVENT_BREAK:
case CHR_EVENT_MUX_IN:
@ -473,8 +485,9 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp)
s->vhost_vqs = g_new0(struct vhost_virtqueue, s->num_queues);
s->connected = false;
qemu_chr_fe_set_handlers(&s->chardev, NULL, NULL, vhost_user_blk_event,
NULL, (void *)dev, NULL, true);
qemu_chr_fe_set_handlers(&s->chardev, NULL, NULL,
vhost_user_blk_event_realize, NULL, (void *)dev,
NULL, true);
reconnect:
if (qemu_chr_fe_wait_connected(&s->chardev, &err) < 0) {
@ -494,6 +507,10 @@ reconnect:
goto reconnect;
}
/* we're fully initialized, now we can operate, so change the handler */
qemu_chr_fe_set_handlers(&s->chardev, NULL, NULL,
vhost_user_blk_event_oper, NULL, (void *)dev,
NULL, true);
return;
virtio_err:

18
hw/isa/vt82c686.c
View file

@ -144,7 +144,18 @@ static void pm_update_sci(ViaPMState *s)
ACPI_BITMASK_POWER_BUTTON_ENABLE |
ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
ACPI_BITMASK_TIMER_ENABLE)) != 0);
pci_set_irq(&s->dev, sci_level);
if (pci_get_byte(s->dev.config + PCI_INTERRUPT_PIN)) {
/*
* FIXME:
* Fix device model that realizes this PM device and remove
* this work around.
* The device model should wire SCI and setup
* PCI_INTERRUPT_PIN properly.
* If PIN# = 0(interrupt pin isn't used), don't raise SCI as
* work around.
*/
pci_set_irq(&s->dev, sci_level);
}
/* schedule a timer interruption if needed */
acpi_pm_tmr_update(&s->ar, (s->ar.pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
!(pmsts & ACPI_BITMASK_TIMER_STATUS));
@ -167,6 +178,11 @@ static void via_pm_reset(DeviceState *d)
/* SMBus IO base */
pci_set_long(s->dev.config + 0x90, 1);
acpi_pm1_evt_reset(&s->ar);
acpi_pm1_cnt_reset(&s->ar);
acpi_pm_tmr_reset(&s->ar);
pm_update_sci(s);
pm_io_space_update(s);
smb_io_space_update(s);
}

3
hw/pci/pci.c
View file

@ -1450,6 +1450,8 @@ static void pci_irq_handler(void *opaque, int irq_num, int level)
PCIDevice *pci_dev = opaque;
int change;
assert(0 <= irq_num && irq_num < PCI_NUM_PINS);
assert(level == 0 || level == 1);
change = level - pci_irq_state(pci_dev, irq_num);
if (!change)
return;
@ -1469,6 +1471,7 @@ static inline int pci_intx(PCIDevice *pci_dev)
qemu_irq pci_allocate_irq(PCIDevice *pci_dev)
{
int intx = pci_intx(pci_dev);
assert(0 <= intx && intx < PCI_NUM_PINS);
return qemu_allocate_irq(pci_irq_handler, pci_dev, intx);
}

16
hw/virtio/virtio-pci.c
View file

@ -1364,9 +1364,14 @@ static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr,
{
VirtIOPCIProxy *proxy = opaque;
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
uint64_t val = qatomic_xchg(&vdev->isr, 0);
pci_irq_deassert(&proxy->pci_dev);
uint64_t val;
if (vdev == NULL) {
return 0;
}
val = qatomic_xchg(&vdev->isr, 0);
pci_irq_deassert(&proxy->pci_dev);
return val;
}
@ -1380,10 +1385,10 @@ static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr,
{
VirtIOPCIProxy *proxy = opaque;
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
uint64_t val = 0;
uint64_t val;
if (vdev == NULL) {
return val;
return 0;
}
switch (size) {
@ -1396,6 +1401,9 @@ static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr,
case 4:
val = virtio_config_modern_readl(vdev, addr);
break;
default:
val = 0;
break;
}
return val;
}