linux-kernel - Re: [PATCH 02/26] cxl/core: Separate region mode from decoder mode

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Date: Tue, 2 Apr 2024 16:25:58 -0700
From: Ira Weiny <ira.weiny@...el.com>
To: Davidlohr Bueso <dave@...olabs.net>, <ira.weiny@...el.com>
CC: Dave Jiang <dave.jiang@...el.com>, Fan Ni <fan.ni@...sung.com>, "Jonathan
 Cameron" <Jonathan.Cameron@...wei.com>, Navneet Singh
	<navneet.singh@...el.com>, Dan Williams <dan.j.williams@...el.com>, "Alison
 Schofield" <alison.schofield@...el.com>, Vishal Verma
	<vishal.l.verma@...el.com>, <linux-btrfs@...r.kernel.org>,
	<linux-cxl@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 02/26] cxl/core: Separate region mode from decoder mode

Davidlohr Bueso wrote:
> On Sun, 24 Mar 2024, ira.weiny@...el.com wrote:
> 
> >From: Navneet Singh <navneet.singh@...el.com>
> >
> >Until now region modes and decoder modes were equivalent in that they
> >were either PMEM or RAM.  With the upcoming addition of Dynamic Capacity
> >regions (which will represent an array of device regions [better named
> >partitions] the index of which could be different on different
> >interleaved devices), the mode of an endpoint decoder and a region will
> >no longer be equivalent.
> >
> >Define a new region mode enumeration and adjust the code for it.
> 
> Could this could also be picked up regardless of dcd?

It could be.  But there is no practical need for it without the addition of
DCD.  So I don't think it should be.

Ira