In reply to -
http://lists.xen.org/archives/html/xen-devel/2016-06/msg00622.html
HI, I am working with Jurgen on the issue, as per Jan's request I tried to
write explicitly only latency timer to be written -
bool force_write = false;
if ((dev_data->permissive || xen_pcibk_permissive) &&
offset == PCI_CACHE_LINE_SIZE && size == 4)
force_write = true;
...
if ((force_write || !handled) && !err) {...}
But then it exposed another issue, the command register field seems not to
be restored also
because I think the bits which are to be restored are not
in PCI_COMMAND_GUEST mask.
The only hack which always works for me is force write even if the
confpsace fields filter doens't allow it -
+ int remainder = size;
+
if (unlikely(verbose_request))
printk(KERN_DEBUG
DRV_NAME ": %s: write request %d bytes at 0x%x =
%x\n",
@@ -252,10 +254,11 @@ int xen_pcibk_config_write(struct pci_dev *dev, int
offset, int size, u32 value)
* special helpers to work correctly.
*/
handled = 1;
+ remainder -= field->size
}
}
- if (!handled && !err) {
+ if ((remainder || !handled) && !err) {
Thanks.
Andrey Grodzovsky.
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