Re: PCIe requirements: Memory vs I/O


Josh Scheid
 

On Tue, Jun 15, 2021 at 9:44 AM Greg Favor <gfavor@...> wrote:
This sentence is fraught with use of a few ill-defined terms, e.g. "regular main memory" and "device scratchpad RAMs" - which for now maybe isn't worth trying to "fix".  I would suggest making a PR on the Priv spec with a proposed rewording.  For example (with a goal of not totally replacing the sentence):

Memory regions that do not fit into regular main memory, for example, device-related RAMs, may be categorized as main memory regions or I/O regions based on the desired attributes.


I can and will do that.  The point of raising this here is to explicitly confirm that the platform intent is to enable Memory PMA within, say, PCIe-managed regions.  With that confirmation now effectively clear we can push on the priv spec.

-Josh

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