On Fri, Jul 24, 2015 at 06:48:57AM +1000, Benjamin Herrenschmidt wrote:
> On Thu, 2015-07-23 at 21:30 +0300, Michael S. Tsirkin wrote:
> > > @@ -1075,7 +1080,8 @@ static pcibus_t pci_bar_address(PCIDevice *d,
> > > /* Check if 32 bit BAR wraps around explicitly.
> > > * TODO: make priorities correct and remove this work
> > around.
> > > */
> > > - if (last_addr <= new_addr || new_addr == 0 || last_addr >=
> > UINT32_MAX) {
> > > + if (last_addr <= new_addr || last_addr >= UINT32_MAX ||
> > > + (!allow_0_address && new_addr == 0)) {
> > > return PCI_BAR_UNMAPPED;
> > > }
>
> Talking of which, how can a BAR wrap around ? BARs are always power-of
> two aligned and naturally aligned (to their own size), they can't
> wrap...
>
> Ben.
>
True.
I seem to have thought it important:
https://lists.nongnu.org/archive/html/qemu-devel/2013-09/msg02594.html
but it makes no sense to me now.
--
MST
