On Tue, 25 Apr 2017, Christoph Hellwig wrote: > Hi John, > > please fix your quoting of the previous mails, thanks! Shoot, sorry about any quoting issues. I'm sufficiently new to conversing on these lists that I'm not even sure which mistake I made. > > > What ACPI defines does not matter at all. Linux uses 32-bit domains > IDs, and on x86 specifily uses those for non-ACPI enumarated domains > (e.g. VMD). > > You've also not demontrated any issue with any Linux driver yet. The NVIDIA out-of-tree driver has historically treated domains as 16-bit. So this showed up when people tried to run that driver in a hyper-v VM. > > > Also...it would be nice if we could use Haiyang's patch as at least a > > temporary fix, because distros are just today releasing the previous code, > > and HyperV will start breaking "occasionally", depending on whether the > > 32-bit virtual (fake) PCI domain fits within 16 bits. (If not, then we can > > rush out a driver update to fix it, but there will be a window of time with > > some breakage there.) > > Just send the fix to whatever driver is broken to the driver maintainer. Done: that would be us. :) > But I can't find a single broken driver in the tree, and as you know > nothing else matters for Linux anyway. > Yes, I looked at Nouveau, and I see that they allow for a 32-bit domain, so I agree that we haven't found any in-tree drivers that have a problem. Anyway, thanks for the answers and explanations. -- thanks, john h
