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Date: Thu, 17 Mar 2016 09:32:29 +1100
From: Cyril Bur <cyrilbur@gmail.com>
To: Benjamin Herrenschmidt <benh@au1.ibm.com>
Cc: mpe@ellerman.id.au, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH] powerpc: Fix possible unrecoverable exception caused by
 '70fe3d9'
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On Wed, 16 Mar 2016 22:45:20 +1100
Benjamin Herrenschmidt <benh@au1.ibm.com> wrote:

> On Wed, 2016-03-16 at 13:29 +1100, Cyril Bur wrote:
> > +#ifdef CONFIG_PPC_BOOK3S
> > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0ld=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0r10,PACAKMSR(r13)
> > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0li=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0r9,MSR_RI
> > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0andc=C2=A0=C2=A0=C2=A0=C2=A0=
r11,r10,r9 /* Re-clear RI */
> > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0mtmsrd=C2=A0=C2=A0r11,1
> > +#endif
>=20
> Do you need that ? IE, mtmsrd with "1" will only update RI and EE, is
> the value of EE in PACAMSR variable ?
>=20

Indeed, so, we should check with Anton who did the disable EE and clear RI =
just
a bit before that.

I had a quick look and to the best of my knowledge EE is not set in PACAKMS=
R.

> Cheers,
> Ben.
>=20