On Tue, May 28, 2013 at 10:06:51AM +0200, Paolo Bonzini wrote:
> Il 28/05/2013 09:40, Amos Kong ha scritto:
> > bootindex parameter of scsi device doesn't work, it causes
> > by wrong pattern in seabios.
> >
> > qemu passes the following firmware dev_path to seabios:
> > /pci@i0cf8/scsi@4/virtio-scsi-device/channel@0/disk@0,0
>
> No, this is another unexpected change due to the virtio refactoring in
> QEMU. The right fix is in QEMU, by adding a get_fw_dev_path
> implementation in hw/virtio/virtio-bus.c.
Hi Paolo,
We could not fix this by implementing get_fw_dev_path in
hw/virtio/virtio-bus.c
virtio-bus is the parent bus of scsi-bus, scsibus_get_fw_dev_path()
will be called after called virtio_bus_get_fw_dev_path().
str0 = returns of parents of virtio-bus /* eg: /pci@i0cf8/scsi@4 */
str1 = return of virtio_bus_get_fw_dev_path() /* eg: .. */
str2 = scsibus_get_fw_dev_path() /* eg: channel@0/disk@0,0 */
The final fw_dev_path should be $str0/$str1/$str2
| static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size)
| {
| int l = 0;
|
| if (dev && dev->parent_bus) {
| char *d;
| l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size);
| d = bus_get_fw_dev_path(dev->parent_bus, dev);
| if (d) {
| l += snprintf(p + l, size - l, "%s", d);
| g_free(d);
if we implement virtio_bus_get_fw_dev_path(), the return value will be set to
$str1
| } else {
| l += snprintf(p + l, size - l, "%s",
object_get_typename(OBJECT(dev)));
Currently we didn't implement virtio_bus_get_fw_dev_path(), so
'virtio-scsi-device' was set to $str1
| }
|
However, we need to change the pattern.
Amos.
> We fixed it already for migration paths, it should be easy to do the
> same for this.
>
> Please Cc [email protected] when sending the QEMU patch.
>
> Thanks,
>
> Paolo
>
> > Signed-off-by: Amos Kong <[email protected]>
> > ---
> > src/boot.c | 5 +++--
> > 1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/src/boot.c b/src/boot.c
> > index c308602..cd9d784 100644
> > --- a/src/boot.c
> > +++ b/src/boot.c
> > @@ -138,10 +138,11 @@ int bootprio_find_scsi_device(struct pci_device *pci,
> > int target, int lun)
> > if (!pci)
> > // support only pci machine for now
> > return -1;
> > - // Find scsi drive - for example: /pci@i0cf8/scsi@5/channel@0/disk@1,0
> > + /* Find scsi drive - for example:
> > + /pci@i0cf8/scsi@5/virtio-scsi-device/channel@0/disk@1,0 */
> > char desc[256], *p;
> > p = build_pci_path(desc, sizeof(desc), "*", pci);
> > - snprintf(p, desc+sizeof(desc)-p, "/*@0/*@%d,%d", target, lun);
> > + snprintf(p, desc+sizeof(desc)-p, "/*/*@0/*@%d,%d", target, lun);
> > return find_prio(desc);
> > }
> >
> >
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