From: david.vrabel@citrix•com (David Vrabel)
To: linux-arm-kernel@lists•infradead.org
Subject: [Xen-devel] [PATCH v3] xen/events: Support event channel rebind on ARM
Date: Tue, 28 Jul 2015 11:03:00 +0100 [thread overview]
Message-ID: <55B75354.8050003@citrix.com> (raw)
In-Reply-To: <1438074642-20809-1-git-send-email-julien.grall@citrix.com>
On 28/07/15 10:10, Julien Grall wrote:
> Currently, the event channel rebind code is gated with the presence of
> the vector callback.
>
> The virtual interrupt controller on ARM has the concept of per-CPU
> interrupt (PPI) which allow us to support per-VCPU event channel.
> Therefore there is no need of vector callback for ARM.
>
> Xen is already using a free PPI to notify the guest VCPU of an event.
> Furthermore, the xen code initialization in Linux (see
> arch/arm/xen/enlighten.c) is requesting correctly a per-CPU IRQ.
>
> Introduce new helper xen_support_evtchn_rebind to allow architecture
> decide whether rebind an event is support or not. It will always return
> 1 on ARM and keep the same behavior on x86.
>
> This is also allow us to drop the usage of xen_have_vector_callback
> entirely in the ARM code.
Applied to for-linus-4.3, thanks.
David
prev parent reply other threads:[~2015-07-28 10:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-28 9:10 [PATCH v3] xen/events: Support event channel rebind on ARM Julien Grall
2015-07-28 10:03 ` David Vrabel [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=55B75354.8050003@citrix.com \
--to=david.vrabel@citrix$(echo .)com \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox