On Tue, Apr 09, 2019 at 04:12:38AM +0100, Igor Druzhinin wrote: > This aperture doesn't exist in QEMU-XEN and hvmloader places BARs > in arbitrary order disregarding prefetchable bit. This makes > prefetchable and non-prefetchable BARs to follow each other that's > quite likely with PCI passthrough devices. In that case, the existing > code, that tries to work out aperture boundaries by reading hvmloader > BAR placement, will report a bogus prefetchable aperture which overlaps > with the regular one. It will eventually trigger an assertion in > DXE PCI initialization code. > > Do the same thing as OVMF on QEMU-KVM and pass a non-existing aperture > there. It's not necessary to pass additional allocation flags as we set > ResourceAssigned flag on the root bridge which means they will be ignored. > > Contributed-under: TianoCore Contribution Agreement 1.1 > Signed-off-by: Igor Druzhinin <igor.druzhi...@citrix.com> > --- > Changes in v2: > * remove usage of prefetchable aperture entirely > * explained rationale for the change in the description > ---
Reviewed-by: Anthony PERARD <anthony.per...@citrix.com> Thanks, -- Anthony PERARD -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#38887): https://edk2.groups.io/g/devel/message/38887 Mute This Topic: https://groups.io/mt/31030418/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
