Re: [PATCH v6 00/11] cxl: ACPI PRM Address Translation Support and AMD Zen5 enablement

[Gregory Price <gourry@gourry.net>]

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