Am Fri, 2 Apr 2021 15:09:12 +0200 schrieb "Enrico Weigelt, metux IT consult" <lkml@xxxxxxxxx>: > On 09.03.21 09:42, Henning Schild wrote: > > > The device will respond to MMIO while being hidden. I am afraid > > nothing stops a collision, except for the assumption that the BIOS > > is always right and PCI devices never get remapped. But just > > guessing here. > > What could go wrong if it is remapped, except that this driver would > write to the wrong mmio space ? > > If it's unhidden, pci-core should see it and start the usual probing, > right ? I have seen this guy exposed to Linux on coreboot machines. No issues. But i can imagine BIOSs that somehow make use of the device and assume it wont move. So we would at least need a parameter to allow keeping that device hidden, or "fixed" in memory. Henning > > --mtx >
