Messages in this thread | | | From | Logan Gunthorpe <> | Date | Sat, 1 Apr 2017 16:16:35 -0600 | Subject | Re: [RFC 1/8] Introduce Peer-to-Peer memory (p2pmem) device |
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Hey,
On 31/03/17 08:17 PM, okaya@codeaurora.org wrote: > See drivers/pci and drivers/acpi directory.
The best I could find was the date of the firmware/bios. I really don't think that makes sense to tie the two together. And really the more that I think about it trying to do a date cutoff for this seems crazy without very comprehensive hardware testing done. I have no idea which AMD chips have decent root ports for this and then if we include all of ARM and POWERPC, etc there's a huge amount of unknown hardware. Saying that the system's firmware has to be written after 2016 seems like an arbitrary restriction that isn't likely to correlate to any working systems.
I still say the only sane thing to do is allow all switches and then add a whitelist of root ports that are known to work well. If we care about preventing broken systems in a comprehensive way then that's the only thing that is going to work.
Logan
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