From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42308) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bEsWh-0004Ij-Ph for qemu-devel@nongnu.org; Mon, 20 Jun 2016 02:17:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bEsWa-0003rK-8T for qemu-devel@nongnu.org; Mon, 20 Jun 2016 02:17:39 -0400 Received: from 12.mo7.mail-out.ovh.net ([178.33.107.167]:47297) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bEsWa-0003r8-1o for qemu-devel@nongnu.org; Mon, 20 Jun 2016 02:17:32 -0400 Received: from player739.ha.ovh.net (b9.ovh.net [213.186.33.59]) by mo7.mail-out.ovh.net (Postfix) with ESMTP id 999C0FF93FD for ; Mon, 20 Jun 2016 08:17:26 +0200 (CEST) References: <576392B1.6030204@kaod.org> <5763A258.2010408@redhat.com> <5763D3EF.6060305@kaod.org> <5763D8D1.70701@redhat.com> <3258f4f3-6f5d-bb1f-9cac-2d19cac7ab53@kaod.org> <1466292910.24271.95.camel@kernel.crashing.org> <1ecfdda6-49a9-a737-80fd-a229c5a1fcf1@kaod.org> <1466345334.24271.123.camel@kernel.crashing.org> <3a87a63c-4c9e-354e-e089-dadfd00b4885@kaod.org> <1466370758.24271.125.camel@kernel.crashing.org> <20160620021902.GF6858@voom.fritz.box> From: =?UTF-8?Q?C=c3=a9dric_Le_Goater?= Message-ID: <33ad19a4-0940-a6ad-9545-a20218453ec8@kaod.org> Date: Mon, 20 Jun 2016 08:17:19 +0200 MIME-Version: 1.0 In-Reply-To: <20160620021902.GF6858@voom.fritz.box> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH 01/10] ppc: Fix rfi/rfid/hrfi/... emulation List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: David Gibson , Benjamin Herrenschmidt Cc: Thomas Huth , qemu-ppc@nongnu.org, qemu-devel@nongnu.org On 06/20/2016 04:19 AM, David Gibson wrote: > On Mon, Jun 20, 2016 at 07:12:38AM +1000, Benjamin Herrenschmidt wrote: >> On Sun, 2016-06-19 at 19:23 +0200, C=E9dric Le Goater wrote: >>>> You can run a 32-bit OS or firmware on ppc64, but it needs to know t= hat >>>> it's running on a 64-bit chip and do a few things differently. >>> >>> yes sure but qemu would still allow rfi under 64bit CPUs, that is wha= t=20 >>> I was concerned about. Is that ok ?=20 >> >> Why ? A real CPU won't allow it, why should we ? >=20 > We shouldn't. However, I'm inclined to in for now, until we have an > OpenBIOS fix actually committed. I'd prefer to keep the existing > setup sorta-working when the current situation is unlikely to break > working code, even though it's definitely wrong. > > BenH or C=E9dric, if you want to resend the hrfi fix patch with the > 64-bit rfi support left in for no, that would be good. The current patch does not need fixing. I will send the OpenBIOS patch=20 shortly after I have looked at the FPU exception. Linux ppc behaves the same on a 970. So we will need to fix the 'rfi's there also.=20 C.