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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 26.06.14 at 18:30, <ian.campbell@xxxxxxxxxx> 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>
> ---
> Needless to say I consider this important for 4.4 backport...

Agreed - for a fix like this I'm not even certain you'd need to wait for
it to make it through the master push gate.

Jan


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