From: Julien Grall <julien.grall@linaro.org>
To: Ian Campbell <ian.campbell@citrix.com>, xen-devel@lists.xen.org
Cc: tim@xen.org, stefano.stabellini@eu.citrix.com
Subject: Re: [PATCH] xen: arm: make sure gcc doesn't use floating-point registers on arm64
Date: Thu, 26 Jun 2014 18:01:40 +0100 [thread overview]
Message-ID: <53AC51F4.1050400@linaro.org> (raw)
In-Reply-To: <1403800214-28416-1-git-send-email-ian.campbell@citrix.com>
Hi Ian,
On 06/26/2014 05:30 PM, Ian Campbell wrote:
> By using -mgeneral-regs-only which is the Aarch64 equivalent to
> -msoft-float.
>
> Otherwise gcc will corrupt the d* registers, which we don't save/restore when
> trapping to/from the hypervisor.
>
> Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Julien Grall <julien.grall@linaro.org>
> ---
> Needless to say I consider this important for 4.4 backport...
+1. I'm a bit surprised that it doesn't happen often.
Regards,
--
Julien Grall
next prev parent reply other threads:[~2014-06-26 17:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-26 16:30 [PATCH] xen: arm: make sure gcc doesn't use floating-point registers on arm64 Ian Campbell
2014-06-26 17:01 ` Julien Grall [this message]
2014-06-27 8:07 ` Jan Beulich
2014-06-27 9:32 ` 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=53AC51F4.1050400@linaro.org \
--to=julien.grall@linaro.org \
--cc=ian.campbell@citrix.com \
--cc=stefano.stabellini@eu.citrix.com \
--cc=tim@xen.org \
--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.