On Mon, Jun 12, 2023 at 07:27:37PM +0000, Kallol Biswas [C] wrote: > Hi, > We have been observing an issue that IO BARs can't be claimed due to > resource > conflict. > > [ 0.457693] pci 0000:00:1d.0: can't claim BAR 4 [io 0x92a0-0x92bf]: > address conflict with PCI Bus 0000:01 [io 0x9000-0x9fff] > [ 0.457705] pci 0000:00:1d.1: can't claim BAR 4 [io 0x9280-0x929f]: > address conflict with PCI Bus 0000:01 [io 0x9000-0x9fff] > [ 0.457715] pci 0000:00:1d.2: can't claim BAR 4 [io 0x9260-0x927f]: > address conflict with PCI Bus 0000:01 [io 0x9000-0x9fff] > [ 0.457743] pci 0000:00:1f.2: can't claim BAR 4 [io 0x9240-0x925f]: > address conflict with PCI Bus 0000:01 [io 0x9000-0x9fff] > [ 0.457754] pci 0000:00:1f.3: can't claim BAR 4 [io 0x9200-0x923f]: > address conflict with PCI Bus 0000:01 [io 0x9000-0x9fff] > > > Please see the discussion thread: > > https://www.spinics.net/lists/linux-pci/msg133740.html > > The root of the problem is that OVMF does not take into account the limit > register's granularity (limit) of a bridge, > and programs EPs with overlapping IO ranges in a different bus. > > Should we fix the issue in the OVMF?
IMHO yes. https://edk2.groups.io/g/devel/message/96645 Jiewen suggested to fix it somewhere in PCI code instead. No response from the PCI maintainers on that comment. Jiewen, Ard? How move forward with that? take care, Gerd -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#106217): https://edk2.groups.io/g/devel/message/106217 Mute This Topic: https://groups.io/mt/99492060/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
