From mboxrd@z Thu Jan  1 00:00:00 1970
From: Julien Grall <julien.grall@linaro.org>
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
Message-ID: <53AC51F4.1050400@linaro.org>
References: <1403800214-28416-1-git-send-email-ian.campbell@citrix.com>
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To: Ian Campbell <ian.campbell@citrix.com>, xen-devel@lists.xen.org
Cc: tim@xen.org, stefano.stabellini@eu.citrix.com
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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