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Date: Fri, 15 Jul 2016 15:15:46 +0800
From: Simon Guo <wei.guo.simon@gmail.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
 Laurent Dufour <ldufour@linux.vnet.ibm.com>,
 linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
 Paul Mackerras <paulus@samba.org>, Kees Cook <keescook@chromium.org>,
 Rashmica Gupta <rashmicy@gmail.com>,
 "cyrilbur@gmail.com" <cyrilbur@gmail.com>
Subject: Re: [v4] powerpc: Export thread_struct.used_vr/used_vsr to user space
Message-ID: <20160715071546.GA5290@simonLocalRHEL7.x64>
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Michael, Ben,
On Fri, Jul 08, 2016 at 08:02:42PM +1000, Michael Ellerman wrote:
> Benjamin Herrenschmidt <benh@kernel.crashing.org> writes:
> 
> > On Thu, 2016-07-07 at 23:21 +1000, Benjamin Herrenschmidt wrote:
> >> 
> >> I think the right fix is that if a restore_sigcontext() has the MSR
> >> bits set,
> >> it should set the corresponding used_* flag.
> >
> > Something like this:
> >
> > (totally untested)
> 
> Simon/Laurent, can you guys test this and let me know if it works for
> your usecase.
> 

Sorry for the late reply. I tested Ben's patch and the fix works for the CRIU
case mentioned before.

Thanks,
Simon