Re: [PATCH v12 6/8] cxl/mem: Configure dynamic capacity interrupts

[Jonathan Cameron]

On Fri, 31 Jul 2026 01:48:11 -0700
Anisa Su <anisa.su887@xxxxxxxxx> wrote:

> From: Ira Weiny <iweiny@xxxxxxxxxx>
> 
> Dynamic Capacity Devices (DCD) support extent change notifications
> through the event log mechanism.  The interrupt mailbox commands were
> extended in CXL 3.1 to support these notifications.  Firmware can't
> configure DCD events to be FW controlled but can retain control of
> memory events.
> 
> Configure DCD event log interrupts on devices supporting dynamic
> capacity.  Disable DCD if interrupts are not supported.
> 
> Care is taken to preserve the interrupt policy set by the FW if FW first
> has been selected by the BIOS.
> 
> Based on an original patch by Navneet Singh.
> 
> Signed-off-by: Ira Weiny <iweiny@xxxxxxxxxx>
> Signed-off-by: Anisa Su <anisa.su@xxxxxxxxxxx>
> Tested-by: Wonjae Lee <wj28.lee@xxxxxxxxxxx>
> Tested-by: Junhee Park <jh9934.park@xxxxxxxxxxx>
> Tested-by: Heesoo Kim <habil.kim@xxxxxxxxxxx>
Reviewed-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxxxxxxxx>