Re: [Xen-devel] [PATCH] xen: arm: make sure gcc doesn't use floating-point registers on arm64

[Julien Grall <julien.grall@xxxxxxxxxx>]

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@xxxxxxxxxx>

Acked-by: Julien Grall <julien.grall@xxxxxxxxxx>

> ---
> 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

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