From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Vrabel Subject: [RFC PATCHv2 00/12] Linux: FIFO-based event channel ABI Date: Fri, 9 Aug 2013 19:15:09 +0100 Message-ID: <1376072121-17786-1-git-send-email-david.vrabel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: Boris Ostrovsky , Wei Liu , David Vrabel List-Id: xen-devel@lists.xenproject.org This is an RFC of Linux guest-side implementation of the FIFO-based event channel ABI described in this design document: http://xenbits.xen.org/people/dvrabel/event-channels-D.pdf Refer also to the Xen series. Patch 1 is a obvious refactoring of common code. Patch 2-6 prepare for supporting multiple ABIs. Patch 7 adds the low-level evtchn_ops hooks. Patch 8-9 add an additional hook for ABI-specific per-port setup (used for expanding the event array as more event are bound). Patch 10 allows many more event channels to be supported by altering how the event channel to irq map is allocated. Note that other factors limit the number of supported IRQs (IRQs is 8192 + 64 * NR_CPUS). Patch 11-12 add the ABI and the implementation. Main known limitations are listed in patch 12. David