From: Gregory Price <gourry@gourry.net>
To: Robert Richter <rrichter@amd.com>
Cc: Alison Schofield <alison.schofield@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
Ira Weiny <ira.weiny@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Dave Jiang <dave.jiang@intel.com>,
Davidlohr Bueso <dave@stgolabs.net>,
linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org,
"Fabio M. De Francesco" <fabio.m.de.francesco@linux.intel.com>,
Terry Bowman <terry.bowman@amd.com>,
Joshua Hahn <joshua.hahnjy@gmail.com>
Subject: Re: [PATCH v3 04/11] cxl/region: Add @range argument to function cxl_find_root_decoder()
Date: Wed, 17 Sep 2025 16:05:13 -0400 [thread overview]
Message-ID: <aMsUeUME_6wkhfp1@gourry-fedora-PF4VCD3F> (raw)
In-Reply-To: <20250912144514.526441-5-rrichter@amd.com>
On Fri, Sep 12, 2025 at 04:45:06PM +0200, Robert Richter wrote:
> cxl_find_root_decoder() uses the endpoint decoder's HPA range to find
> the root decoder. This requires endpoints and root decoders to be in
> the same memory domain, which is not the case for systems that need
> address translation.
>
> Add a separate @range argument to function cxl_find_root_decoder() to
> specify the root decoder's address range. Now it is possible to pass a
> translated address range of an endpoint decoder to function
> cxl_find_root_decoder().
>
> Patch is a prerequisite to implement address translation.
>
> Signed-off-by: Robert Richter <rrichter@amd.com>
Maybe worth noting that this patch is just a refactor (i.e. no-op).
Reviewed-by: Gregory Price <gourry@gourry.net>
next prev parent reply other threads:[~2025-09-17 20:05 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-12 14:45 [PATCH v3 00/11] cxl: ACPI PRM Address Translation Support and AMD Zen5 enablement Robert Richter
2025-09-12 14:45 ` [PATCH v3 01/11] cxl/region: Store root decoder in struct cxl_region Robert Richter
2025-09-12 15:52 ` Dave Jiang
2025-09-15 10:14 ` Jonathan Cameron
2025-09-17 19:56 ` Gregory Price
2025-09-23 21:40 ` Alison Schofield
2025-09-26 17:52 ` Robert Richter
2025-09-12 14:45 ` [PATCH v3 02/11] cxl/region: Store HPA range " Robert Richter
2025-09-12 17:17 ` Dave Jiang
2025-09-15 7:19 ` Robert Richter
2025-09-15 16:24 ` Dave Jiang
2025-09-15 10:23 ` Jonathan Cameron
2025-09-17 8:15 ` Robert Richter
2025-09-17 19:58 ` Gregory Price
2025-09-12 14:45 ` [PATCH v3 03/11] cxl/region: Rename misleading variable name @hpa to @range Robert Richter
2025-09-12 17:33 ` Dave Jiang
2025-09-15 7:27 ` Robert Richter
2025-09-15 10:25 ` Jonathan Cameron
2025-09-17 8:10 ` Robert Richter
2025-09-17 20:01 ` Gregory Price
2025-09-12 14:45 ` [PATCH v3 04/11] cxl/region: Add @range argument to function cxl_find_root_decoder() Robert Richter
2025-09-17 20:05 ` Gregory Price [this message]
2025-09-12 14:45 ` [PATCH v3 05/11] cxl/region: Add @range argument to function cxl_calc_interleave_pos() Robert Richter
2025-09-17 20:09 ` Gregory Price
2025-09-23 21:52 ` Alison Schofield
2025-09-26 18:22 ` Robert Richter
2025-09-12 14:45 ` [PATCH v3 06/11] cxl/region: Separate region parameter setup and region construction Robert Richter
2025-09-12 21:10 ` Dave Jiang
2025-09-15 7:31 ` Robert Richter
2025-09-15 16:26 ` Dave Jiang
2025-09-17 20:15 ` Gregory Price
2025-09-12 14:45 ` [PATCH v3 07/11] cxl: Introduce callback to translate a decoder's HPA to the next parent port Robert Richter
2025-09-12 21:21 ` Dave Jiang
2025-09-15 7:55 ` Robert Richter
2025-09-15 16:32 ` Dave Jiang
2025-09-15 20:22 ` Dave Jiang
2025-09-17 8:20 ` Robert Richter
2025-09-12 14:45 ` [PATCH v3 08/11] cxl/region: Implement endpoint decoder address translation Robert Richter
2025-09-15 10:46 ` Jonathan Cameron
2025-09-15 16:35 ` Dave Jiang
2025-09-17 9:04 ` Robert Richter
2025-09-17 20:51 ` Gregory Price
2025-09-17 20:57 ` Dave Jiang
2025-09-18 13:59 ` Gregory Price
2025-09-12 14:45 ` [PATCH v3 09/11] cxl/region: Lock decoders that need " Robert Richter
2025-09-17 20:52 ` Gregory Price
2025-09-12 14:45 ` [PATCH v3 10/11] cxl/acpi: Prepare use of EFI runtime services Robert Richter
2025-09-17 20:54 ` Gregory Price
2025-09-12 14:45 ` [PATCH v3 11/11] cxl: Enable AMD Zen5 address translation using ACPI PRMT Robert Richter
2025-09-12 23:46 ` Dave Jiang
2025-09-15 8:34 ` Robert Richter
2025-09-15 10:59 ` Jonathan Cameron
2025-09-17 9:43 ` Robert Richter
2025-09-17 13:50 ` Jonathan Cameron
2025-09-17 21:01 ` Dave Jiang
2025-09-24 17:09 ` Gregory Price
2025-09-26 16:59 ` Robert Richter
2025-09-27 1:44 ` Gregory Price
2025-09-29 12:39 ` Robert Richter
2025-09-12 15:45 ` [PATCH v3 00/11] cxl: ACPI PRM Address Translation Support and AMD Zen5 enablement Dave Jiang
2025-09-15 8:42 ` Robert Richter
2025-09-23 3:26 ` Gregory Price
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