On Tue, Mar 21, 2023 at 07:53:33PM +0200, Andy Shevchenko wrote: > On Tue, Mar 21, 2023 at 04:02:41PM +0000, Niyas Sait wrote: > > This patch refactors the ACPI DMA layer to support platforms without > > shared info descriptor in CSRT. > > > > Shared info descriptor is optional and vendor specific (not > > standardized) and not used by Arm platforms. Btw, what is the real argument of not using this table? Yes, I know that this is an MS extension, but why ARM needs something else and why even that is needed at all? CSRT is only for the _shared_ DMA resources and I think most of the IPs nowadays are using private DMA engines (or semi-private when driver based on ID can know which channel services which device). -- With Best Regards, Andy Shevchenko
