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

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2014-06-27 at 09:07 +0100, Jan Beulich wrote:
> >>> 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.

Since the push gate doesn't even test arm64 at the moment I was
certainly planning to skip that delay, yes. (and I would have considered
it even if it was being tested...)

Ian.


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