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Subject: Re: [PATCH v8 03/14] powerpc/vas: Define nx_fault_stamp in
 coprocessor_request_block
From: Haren Myneni <haren@linux.ibm.com>
To: Nicholas Piggin <npiggin@gmail.com>
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Date: Sun, 22 Mar 2020 17:57:51 -0700
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On Mon, 2020-03-23 at 10:30 +1000, Nicholas Piggin wrote:
> Haren Myneni's on March 19, 2020 4:13 pm:
> > 
> > Kernel sets fault address and status in CRB for NX page fault on user
> > space address after processing page fault. User space gets the signal
> > and handles the fault mentioned in CRB by bringing the page in to
> > memory and send NX request again.
> > 
> > Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
> > Signed-off-by: Haren Myneni <haren@linux.ibm.com>
> > ---
> >  arch/powerpc/include/asm/icswx.h | 18 +++++++++++++++++-
> >  1 file changed, 17 insertions(+), 1 deletion(-)
> > 
> > diff --git a/arch/powerpc/include/asm/icswx.h b/arch/powerpc/include/asm/icswx.h
> > index 9872f85..b233d1e 100644
> > --- a/arch/powerpc/include/asm/icswx.h
> > +++ b/arch/powerpc/include/asm/icswx.h
> 
> "icswx" is not a thing anymore, after 6ff4d3e96652 ("powerpc: Remove old 
> unused icswx based coprocessor support"). I guess NX is reusing some 
> things from it, but it would be good to get rid of the cruft and re-name
> this file and and relevant names.
> 
> NX already uses this file, so I guesss that can happen after this series.

But NX uses icswx on P8 and icswx.h has only NX specific macros right
now. 

> 
> Thanks,
> Nick
>