From: Jonathan Cameron <jonathan.cameron@huawei.com>
To: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
Cc: <linux-cxl@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<nvdimm@lists.linux.dev>, <linux-fsdevel@vger.kernel.org>,
<linux-pm@vger.kernel.org>, Ard Biesheuvel <ardb@kernel.org>,
"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>,
Yazen Ghannam <yazen.ghannam@amd.com>,
"Dave Jiang" <dave.jiang@intel.com>,
Davidlohr Bueso <dave@stgolabs.net>,
"Matthew Wilcox" <willy@infradead.org>, Jan Kara <jack@suse.cz>,
"Rafael J . Wysocki" <rafael@kernel.org>,
Len Brown <len.brown@intel.com>, Pavel Machek <pavel@kernel.org>,
Li Ming <ming.li@zohomail.com>,
Jeff Johnson <jeff.johnson@oss.qualcomm.com>,
Ying Huang <huang.ying.caritas@gmail.com>,
Yao Xingtao <yaoxt.fnst@fujitsu.com>,
"Peter Zijlstra" <peterz@infradead.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Nathan Fontenot <nathan.fontenot@amd.com>,
Terry Bowman <terry.bowman@amd.com>,
Robert Richter <rrichter@amd.com>,
Benjamin Cheatham <benjamin.cheatham@amd.com>,
Zhijian Li <lizhijian@fujitsu.com>,
Borislav Petkov <bp@alien8.de>,
Tomasz Wolski <tomasz.wolski@fujitsu.com>
Subject: Re: [PATCH v5 3/7] cxl/region: Skip decoder reset on detach for autodiscovered regions
Date: Thu, 22 Jan 2026 16:18:58 +0000 [thread overview]
Message-ID: <20260122161858.00004b0c@huawei.com> (raw)
In-Reply-To: <20260122045543.218194-4-Smita.KoralahalliChannabasappa@amd.com>
On Thu, 22 Jan 2026 04:55:39 +0000
Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com> wrote:
> __cxl_decoder_detach() currently resets decoder programming whenever a
> region is detached if cxl_config_state is beyond CXL_CONFIG_ACTIVE. For
> autodiscovered regions, this can incorrectly tear down decoder state
> that may be relied upon by other consumers or by subsequent ownership
> decisions.
>
> Skip cxl_region_decode_reset() during detach when CXL_REGION_F_AUTO is
> set.
>
> Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
purely on basis we should probably not undo things we didn't do in the
first place.
J
next prev parent reply other threads:[~2026-01-22 16:19 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-22 4:55 [PATCH v5 0/7] dax/hmem, cxl: Coordinate Soft Reserved handling with CXL and HMEM Smita Koralahalli
2026-01-22 4:55 ` [PATCH v5 1/7] dax/hmem: Request cxl_acpi and cxl_pci before walking Soft Reserved ranges Smita Koralahalli
2026-01-22 16:16 ` Jonathan Cameron
2026-01-22 4:55 ` [PATCH v5 2/7] dax/hmem: Gate Soft Reserved deferral on DEV_DAX_CXL Smita Koralahalli
2026-01-22 4:55 ` [PATCH v5 3/7] cxl/region: Skip decoder reset on detach for autodiscovered regions Smita Koralahalli
2026-01-22 16:18 ` Jonathan Cameron [this message]
2026-01-26 21:37 ` Koralahalli Channabasappa, Smita
2026-01-27 23:37 ` dan.j.williams
2026-01-28 15:39 ` Alejandro Lucero Palau
2026-01-28 21:24 ` dan.j.williams
2026-01-23 10:42 ` Alejandro Lucero Palau
2026-01-23 21:58 ` Dave Jiang
2026-01-22 4:55 ` [PATCH v5 4/7] cxl/region: Add helper to check Soft Reserved containment by CXL regions Smita Koralahalli
2026-01-22 16:25 ` Jonathan Cameron
2026-01-27 21:47 ` Koralahalli Channabasappa, Smita
2026-01-23 22:19 ` Dave Jiang
2026-01-25 3:30 ` Koralahalli Channabasappa, Smita
2026-01-27 21:59 ` dan.j.williams
2026-01-28 21:07 ` Koralahalli Channabasappa, Smita
2026-01-28 21:33 ` dan.j.williams
2026-01-22 4:55 ` [PATCH v5 5/7] dax: Introduce dax_cxl_mode for CXL coordination Smita Koralahalli
2026-01-22 16:33 ` Jonathan Cameron
2026-01-23 22:30 ` Dave Jiang
2026-01-27 20:03 ` Alison Schofield
2026-01-22 4:55 ` [PATCH v5 6/7] dax/hmem, cxl: Defer and resolve ownership of Soft Reserved memory ranges Smita Koralahalli
2026-01-22 13:40 ` kernel test robot
2026-01-23 5:30 ` kernel test robot
2026-01-23 6:35 ` Alison Schofield
2026-01-26 21:05 ` Koralahalli Channabasappa, Smita
2026-01-26 22:33 ` Alison Schofield
2026-01-27 21:45 ` Koralahalli Channabasappa, Smita
2026-01-29 0:45 ` dan.j.williams
2026-01-23 11:59 ` Alejandro Lucero Palau
2026-01-25 3:17 ` Koralahalli Channabasappa, Smita
2026-01-26 12:20 ` Alejandro Lucero Palau
2026-01-26 14:26 ` Alejandro Lucero Palau
2026-01-26 23:53 ` dan.j.williams
2026-01-27 12:16 ` Alejandro Lucero Palau
2025-10-01 17:15 ` Tomasz Wolski
2026-01-27 16:52 ` Alejandro Lucero Palau
2026-01-27 23:41 ` dan.j.williams
2026-01-28 16:19 ` Alejandro Lucero Palau
2026-01-27 21:29 ` Koralahalli Channabasappa, Smita
2026-01-23 22:55 ` Dave Jiang
2026-01-27 1:38 ` Alison Schofield
2026-01-28 21:14 ` Koralahalli Channabasappa, Smita
2026-01-28 21:47 ` Alison Schofield
2026-01-27 20:11 ` Alison Schofield
2026-01-28 23:35 ` dan.j.williams
2026-01-29 3:09 ` dan.j.williams
2026-01-29 21:20 ` Koralahalli Channabasappa, Smita
2026-01-29 22:01 ` dan.j.williams
2026-02-04 23:27 ` Tomasz Wolski
2026-01-22 4:55 ` [PATCH v5 7/7] dax/hmem: Reintroduce Soft Reserved ranges back into the iomem tree Smita Koralahalli
2026-01-22 16:39 ` Jonathan Cameron
2026-01-28 22:07 ` Koralahalli Channabasappa, Smita
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