mirrors/qemu
0
0
Fork 0
mirror of https://github.com/qemu/qemu.git synced 2024-11-25 20:03:37 +08:00
Code Issues Packages Projects Releases Wiki Activity

virtio-pci: fix bus master work around on load

Browse Source 
Commit c81131db15
detects old guests by comparing virtio and
PCI status. It attempts to do this on load,
as well, but load_config callback in a binding
is invoked too early and so the virtio status
isn't set yet.

We could add yet another callback to the
binding, to invoke after load, but it
seems easier to reuse the existing vmstate
callback.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Alexander Graf <agraf@suse.de>
This commit is contained in:
Michael S. Tsirkin 2011-03-19 19:28:19 +02:00
parent 6f3279b5d1
commit 89c473fd82
2 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
hw/virtio-pci.c
View File

@ -160,13 +160,6 @@ static int virtio_pci_load_config(void * opaque, QEMUFile *f)
if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
}
/* 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;
}
return 0;
}
@ -651,6 +644,12 @@ 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);

1
hw/virtio.h
View File

@ -92,6 +92,7 @@ typedef struct {
void (*save_queue)(void * opaque, int n, QEMUFile *f);
int (*load_config)(void * opaque, QEMUFile *f);
int (*load_queue)(void * opaque, int n, QEMUFile *f);
int (*load_done)(void * opaque, QEMUFile *f);
unsigned (*get_features)(void * opaque);
bool (*query_guest_notifiers)(void * opaque);
int (*set_guest_notifiers)(void * opaque, bool assigned);