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[96.255.20.138]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8846e599ac9sm131231076d6.49.2025.11.25.13.04.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Nov 2025 13:04:48 -0800 (PST) Date: Tue, 25 Nov 2025 16:04:46 -0500 From: Gregory Price To: Alison Schofield Cc: Robert Richter , Vishal Verma , Ira Weiny , Dan Williams , Jonathan Cameron , Dave Jiang , Davidlohr Bueso , linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org, "Fabio M. De Francesco" , Terry Bowman , Joshua Hahn Subject: Re: [PATCH v6 00/11] cxl: ACPI PRM Address Translation Support and AMD Zen5 enablement Message-ID: References: <20251114004021.1310661-1-rrichter@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Nov 25, 2025 at 08:37:33AM -0800, Alison Schofield wrote: > On Tue, Nov 25, 2025 at 08:54:58AM -0500, Gregory Price wrote: > > Could be your devices don't support inject or clear. At init time we set > the bits inidicating what poison opcodes the device supports, see > cxl_set_poison_cmd_enabled(). > 50d527f52cbf ("cxl/mem: Add debugfs attributes for poison inject and clear") > > Devices may support list but not inject and clear. Look for this attribute: > /sys/bus/cxl/devices/memX/trigger_poison_list. If that is present, then a > quicker, maybe fruitful check, may be 'cxl list -M --media-errors'. If you're > lucky ;) your devices come pre-loaded with poison. That cmd will emit the > poisoned DPAs and if part of a region, the SPAs too. cxl-list is getting that > all from the kernel trace log, so if you don't have 'cxl list', just trigger > directly and examine the trace log. > Unfortunately it appears my devices do not support any of this :[ [ /sys/kernel/debug/cxl]$ ls mem0/ dpamem Is all I have ~Gregory