All of lore.kernel.org
 help / color / mirror / Atom feed
From: Julien Grall <julien.grall@citrix.com>
To: Ian Campbell <ian.campbell@citrix.com>,
	Julien Grall <julien.grall.oss@gmail.com>
Cc: Chen Baozi <baozich@gmail.com>, Chen Baozi <cbz@baozis.org>,
	Iurii Konovalenko <iurii.konovalenko@globallogic.com>,
	Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>,
	xen-devel@lists.xen.org
Subject: Re: [PATCH] xen/arm64: Avoid sending SGI when kicking secondary cpus with spin_table
Date: Wed, 15 Apr 2015 18:54:17 +0100	[thread overview]
Message-ID: <552EA5C9.9070201@citrix.com> (raw)
In-Reply-To: <1429114884.25195.5.camel@citrix.com>

Hi Ian,

On 15/04/2015 17:21, Ian Campbell wrote:

>>
>> Hmmm... I looked the wrong code in Linux :/.
>> The SGI is required for most of the platforms.
>
> Could you give a pointer to that code please.

The call to arch_send_wakeup_ipi_mask is done per-platform.
For the platforms supported by Xen:

arndale: mach-exynos/platsmp.c
omap5: mach-omap2/omap-smp.c

I wasn't able to find if RCAR (CC Iurii for it) and Vexpress really 
require an SGI to bring up secondary CPUs.

Regards,

-- 
Julien Grall

  parent reply	other threads:[~2015-04-15 17:54 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-07  7:33 [PATCH] xen/arm64: Avoid sending SGI when kicking secondary cpus with spin_table Chen Baozi
2015-04-08 12:23 ` Julien Grall
2015-04-15 14:57   ` Ian Campbell
2015-04-15 15:56     ` Julien Grall
2015-04-15 16:21       ` Ian Campbell
2015-04-15 17:53         ` Julien Grall
2015-04-15 17:54         ` Julien Grall [this message]
2015-05-08 16:38 ` Julien Grall
2015-05-09 12:52   ` Chen Baozi
2015-05-08 16:39 ` Ian Campbell

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=552EA5C9.9070201@citrix.com \
    --to=julien.grall@citrix.com \
    --cc=Stefano.Stabellini@eu.citrix.com \
    --cc=baozich@gmail.com \
    --cc=cbz@baozis.org \
    --cc=ian.campbell@citrix.com \
    --cc=iurii.konovalenko@globallogic.com \
    --cc=julien.grall.oss@gmail.com \
    --cc=xen-devel@lists.xen.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.