[v4] XSA-343 followup patches

[PATCH v4 0/2] XSA-343 followup patches

Juergen Gross posted 2 patches 3 years, 5 months ago

Diff against v1 v2 v3 v5 v6
Download series mbox

Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/xen tags/patchew/20201102150408.4954-1-jgross@suse.com

Maintainers: Wei Liu <wl@xen.org>, "Roger Pau Monné" <roger.pau@citrix.com>, George Dunlap <george.dunlap@citrix.com>, Ian Jackson <iwj@xenproject.org>, Andrew Cooper <andrew.cooper3@citrix.com>, Jan Beulich <jbeulich@suse.com>, Julien Grall <julien@xen.org>, Stefano Stabellini <sstabellini@kernel.org>

There is a newer version of this series

xen/arch/x86/irq.c         |   6 +-
xen/arch/x86/pv/shim.c     |   9 +--
xen/common/event_channel.c | 120 ++++++++++++++++++-------------------
xen/common/event_fifo.c    |  25 ++++++--
xen/include/xen/event.h    |  55 +++++++++++++----
xen/include/xen/sched.h    |   6 +-
6 files changed, 131 insertions(+), 90 deletions(-)

Expand all Fold all

[PATCH v4 0/2] XSA-343 followup patches

Posted by Juergen Gross 3 years, 5 months ago

The patches for XSA-343 produced some fallout, especially the event
channel locking has shown to be problematic.

Patch 1 is targeting fifo event channels for avoiding any races for the
case that the fifo queue has been changed for a specific event channel.

The second patch is modifying the per event channel locking scheme in
order to avoid deadlocks and problems due to the event channel lock
having been changed to require IRQs off by the XSA-343 patches.

Changes in V4:
- switched to real rwlock

Changes in V3:
- addressed comments

*** BLURB HERE ***

Juergen Gross (2):
  xen/events: access last_priority and last_vcpu_id together
  xen/evtchn: rework per event channel lock

 xen/arch/x86/irq.c         |   6 +-
 xen/arch/x86/pv/shim.c     |   9 +--
 xen/common/event_channel.c | 120 ++++++++++++++++++-------------------
 xen/common/event_fifo.c    |  25 ++++++--
 xen/include/xen/event.h    |  55 +++++++++++++----
 xen/include/xen/sched.h    |   6 +-
 6 files changed, 131 insertions(+), 90 deletions(-)

-- 
2.26.2