On Wed, Oct 07, 2026 at 01:16:39PM -0700, Anisa Su wrote: > From: Ira Weiny <[email protected]> > > 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. > > The DCD event log is not drained here. cxl_event_drain_mask() reports > only the logs the driver can service, and the DCD bit is added by > the patch introducing DCD event handling. Until then a DCD interrupt > wakes the event thread, which finds no log it owns and returns. > > 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 <[email protected]> > Co-developed-by: Anisa Su <[email protected]> > Signed-off-by: Anisa Su <[email protected]>
Reviewed-by: Alison Schofield <[email protected]>
