Il 21/03/2014 15:17, Alex Williamson ha scritto:
> > Is this possible? Assuming len is initially a power-of-2, would the
> > translate function change it? Maybe worth a comment to explain.
Oh. address_space_translate() actually changes @len to min(len,
TARGET_PAGE_SIZE) and TARGET_PAGE_SIZE is hardcoded to 4K. So far it was ok
but lately I have been implementing a huge DMA window (plus one
sPAPRTCETable and one VFIOGuestIOMMU objects) which currently operates with
16MB pages (can do 64K pages too) and now this "granularity incompatible"
is happening.
I disabled that check but I need to think of better fix...
Adding Paolo to cc, may be he picks the context and gives good piece of
advise :)
I think that "if" in address_space_translate should be restricted to
Xen, since that's what it was added for.
Paolo
