From: Jonathan Cameron <jonathan.cameron@huawei.com>
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>,
Dave Jiang <dave.jiang@intel.com>,
"Davidlohr Bueso" <dave@stgolabs.net>,
<linux-cxl@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
Gregory Price <gourry@gourry.net>,
"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 v4 11/14] cxl/atl: Lock decoders that need address translation
Date: Tue, 11 Nov 2025 15:31:50 +0000 [thread overview]
Message-ID: <20251111153150.000051cf@huawei.com> (raw)
In-Reply-To: <20251103184804.509762-12-rrichter@amd.com>
On Mon, 3 Nov 2025 19:47:52 +0100
Robert Richter <rrichter@amd.com> wrote:
> There is only support to translate addresses from an endpoint to its
> CXL host bridge, but not in the opposite direction from the bridge to
> the endpoint. Thus, the endpoint address range cannot be determined
> and setup manually for a given SPA range of a region. If the endpoint
> has address translation enabled, lock it to prevent the kernel from
> reconfiguring it.
>
> Reviewed-by: Gregory Price <gourry@gourry.net>
> Signed-off-by: Robert Richter <rrichter@amd.com>
I'm fine with your explanation to Dave so
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
next prev parent reply other threads:[~2025-11-11 15:31 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-03 18:47 [PATCH v4 00/14] cxl: ACPI PRM Address Translation Support and AMD Zen5 enablement Robert Richter
2025-11-03 18:47 ` [PATCH v4 01/14] cxl/region: Store root decoder in struct cxl_region Robert Richter
2025-11-11 14:45 ` Jonathan Cameron
2025-11-14 9:38 ` Robert Richter
2025-11-03 18:47 ` [PATCH v4 02/14] cxl/region: Store HPA range " Robert Richter
2025-11-11 11:25 ` Robert Richter
2025-11-03 18:47 ` [PATCH v4 03/14] cxl/region: Rename misleading variable name @hpa to @hpa_range Robert Richter
2025-11-03 21:36 ` Dave Jiang
2025-11-11 14:41 ` Jonathan Cameron
2025-11-12 16:23 ` Dave Jiang
2025-11-03 18:47 ` [PATCH v4 04/14] cxl/region: Add @hpa_range argument to function cxl_calc_interleave_pos() Robert Richter
2025-11-03 21:52 ` Dave Jiang
2025-11-04 3:04 ` Alison Schofield
2025-11-11 11:28 ` Robert Richter
2025-11-04 16:52 ` kernel test robot
2025-11-03 18:47 ` [PATCH v4 05/14] cxl: Simplify cxl_root_ops allocation and handling Robert Richter
2025-11-03 21:53 ` Dave Jiang
2025-11-04 23:02 ` Dave Jiang
2025-11-07 15:45 ` Robert Richter
2025-11-07 15:50 ` Dave Jiang
2025-11-11 14:52 ` Jonathan Cameron
2025-11-03 18:47 ` [PATCH v4 06/14] cxl/region: Separate region parameter setup and region construction Robert Richter
2025-11-03 22:05 ` Dave Jiang
2025-11-07 15:59 ` Robert Richter
2025-11-11 14:59 ` Jonathan Cameron
2025-11-11 15:02 ` Jonathan Cameron
2025-11-03 18:47 ` [PATCH v4 07/14] cxl/region: Use region data to get the root decoder Robert Richter
2025-11-03 22:30 ` Dave Jiang
2025-11-11 15:14 ` Jonathan Cameron
2025-11-03 18:47 ` [PATCH v4 08/14] cxl: Introduce callback for HPA address ranges translation Robert Richter
2025-11-03 23:09 ` Dave Jiang
2025-11-11 15:15 ` Jonathan Cameron
2025-11-03 18:47 ` [PATCH v4 09/14] cxl/acpi: Prepare use of EFI runtime services Robert Richter
2025-11-03 23:34 ` Dave Jiang
2025-11-11 15:17 ` Jonathan Cameron
2025-11-03 18:47 ` [PATCH v4 10/14] cxl: Enable AMD Zen5 address translation using ACPI PRMT Robert Richter
2025-11-04 1:00 ` Dave Jiang
2025-11-11 9:23 ` Robert Richter
2025-11-04 9:33 ` kernel test robot
2025-11-04 12:49 ` Robert Richter
2025-11-04 23:35 ` kernel test robot
2025-11-11 15:30 ` Jonathan Cameron
2025-11-13 11:24 ` Robert Richter
2025-11-03 18:47 ` [PATCH v4 11/14] cxl/atl: Lock decoders that need address translation Robert Richter
2025-11-04 17:13 ` Dave Jiang
2025-11-11 12:54 ` Robert Richter
2025-11-12 16:34 ` Dave Jiang
2025-11-13 20:05 ` Robert Richter
2025-11-13 20:36 ` Dave Jiang
2025-11-14 7:34 ` Robert Richter
2025-11-14 15:21 ` Dave Jiang
2025-11-11 15:31 ` Jonathan Cameron [this message]
2025-11-03 18:47 ` [PATCH v4 12/14] cxl: Simplify cxl_rd_ops allocation and handling Robert Richter
2025-11-04 17:26 ` Dave Jiang
2025-11-04 23:02 ` Alison Schofield
2025-11-11 12:07 ` Robert Richter
2025-11-11 15:34 ` Jonathan Cameron
2025-11-03 18:47 ` [PATCH v4 13/14] cxl/acpi: Group xor arithmetric setup code in a single block Robert Richter
2025-11-11 15:35 ` Jonathan Cameron
2025-11-03 18:47 ` [PATCH v4 14/14] cxl/region: Remove local variable @inc in cxl_port_setup_targets() Robert Richter
2025-11-11 15:36 ` Jonathan Cameron
2025-11-13 20:10 ` Robert Richter
2025-11-04 16:17 ` [PATCH v4 00/14] cxl: ACPI PRM Address Translation Support and AMD Zen5 enablement Alison Schofield
2025-11-17 15:34 ` Robert Richter
2025-11-17 17:23 ` Gregory Price
2025-11-11 14:01 ` Gregory Price
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