[XEN,v2,0/2] Enumerate all allocated evtchns in lsevtchn

Message

Matthew Barnes April 29, 2024, 1:42 p.m. UTC

Currently, lsevtchn aborts its event channel enumeration when it hits
its first hypercall error, namely:
* When an event channel doesn't exist at the specified port
* When the event channel is owned by Xen

This results in lsevtchn missing potential relevant event channels with
higher port numbers, since lsevtchn cannot determine the cause of
hypercall errors.

This patch adds error status indicators for the evtchn_status hypercall
for when no further event channels will be yielded for higher port
numbers, allowing lsevtchn to terminate when all event channels have
been enumerated over.

Matthew Barnes (2):
  evtchn: Add error status indicators for evtchn_status hypercall
  tools/lsevtchn: Use new status identifiers in loop

 tools/xcutils/lsevtchn.c           | 11 ++++++++++-
 xen/common/event_channel.c         | 12 +++++++++++-
 xen/include/public/event_channel.h |  2 ++
 3 files changed, 23 insertions(+), 2 deletions(-)