PCI range checking under qemu-system-sparc64

Mark Cave-Ayland mark.cave-ayland at ilande.co.uk
Sun Sep 13 17:47:37 UTC 2015

On 13/09/15 11:39, Alexey Dokuchaev wrote:

> On Sun, Sep 13, 2015 at 04:21:43AM +0200, Marius Strobl wrote:
>> However, looking at ebus(4), I've spotted a bug in the conversion
>> to NEW_PCIB. Interested parties might want to give the attached
>> patch a try. That bug definitely can lead to the problem seen with
>> QEMU, I'm not sure it's the only one in that regard, though; I'm
>> fairly certain in this case there's no problem with interpreting
>> the device-tree involved, given that the same code is used for
>> ISA busses which - at least in reality - unlike EBus ones use
>> I/O port instead of memory space for the resources of devices
>> such as UARTs etc. There could be other spots not prepared for
>> EBus devices suddenly requesting SYS_RES_IOPORT, too, though.
> I've applied that patch, but it alone is not enough to allow the boot
> to proceed further in QEMU. :(

How sad :(

> As Mark had mentioned, I will try to get some debug info and share
> it if I find anything interesting.

Yes please. Once the ebus attach is sorted then hopefully things will
start to become a bit clearer...



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