From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DDA15C33C9E for ; Wed, 8 Jan 2020 02:06:46 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A88EA20692 for ; Wed, 8 Jan 2020 02:06:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="EZwGqXLl" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A88EA20692 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:59400 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ip0k9-0004XI-Aa for qemu-devel@archiver.kernel.org; Tue, 07 Jan 2020 21:06:45 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:42134) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ip0ie-0002dE-Gg for qemu-devel@nongnu.org; Tue, 07 Jan 2020 21:05:14 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ip0id-0007h2-94 for qemu-devel@nongnu.org; Tue, 07 Jan 2020 21:05:12 -0500 Received: from bilbo.ozlabs.org ([203.11.71.1]:41573 helo=ozlabs.org) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ip0ic-0007ee-CH; Tue, 07 Jan 2020 21:05:11 -0500 Received: by ozlabs.org (Postfix, from userid 1007) id 47ssyV6Tfnz9sRp; Wed, 8 Jan 2020 13:05:06 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1578449106; bh=eck8x1LIVNF1XCB52DlZOygdPnqzcu5E95oruIIGeQ4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=EZwGqXLlGpWbqx0DLSSoCfv5w71VVltFLP9rm2D4splOh3zLOsT3/7snp1HCLvNrM 5D+jMo7ERbpFlqOMZV+61crUSCwz7oggkhWAllCqxydhUQhzktxbQ19sweX4CpSW+Y u0vSI9+x9JDpPLQ96Yvg7r/Ye3cMxbgIDrK+W7fA= Date: Wed, 8 Jan 2020 12:09:08 +1100 From: David Gibson To: BALATON Zoltan Subject: Re: [PATCH v2 02/10] ppc: Remove stub of PPC970 HID4 implementation Message-ID: <20200108010908.GK2137@umbus.fritz.box> References: <20200107044827.471355-1-david@gibson.dropbear.id.au> <20200107044827.471355-3-david@gibson.dropbear.id.au> <20200107183215.09ce18c6@bahia.lan> <20200107183638.1c84f172@bahia.lan> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="aznLbwQ42o7LEaqN" Content-Disposition: inline In-Reply-To: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 203.11.71.1 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lvivier@redhat.com, Greg Kurz , qemu-devel@nongnu.org, qemu-ppc@nongnu.org, clg@kaod.org, paulus@samba.org, philmd@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --aznLbwQ42o7LEaqN Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jan 07, 2020 at 07:05:41PM +0100, BALATON Zoltan wrote: > On Tue, 7 Jan 2020, Greg Kurz wrote: > > On Tue, 7 Jan 2020 18:32:15 +0100 > > Greg Kurz wrote: > >=20 > > > On Tue, 7 Jan 2020 15:48:19 +1100 > > > David Gibson wrote: > > >=20 > > > > The PowerPC 970 CPU was a cut-down POWER4, which had hypervisor cap= ability. > > > > However, it can be (and often was) strapped into "Apple mode", wher= e the > > > > hypervisor capabilities were disabled (essentially putting it alway= s in > > > > hypervisor mode). > >=20 > > Isn't it supervisor mode instead of hypervisor mode ? >=20 > By the way, do you know if this strapping is hardware or software based? = So > is it the firmware that disables it on Apple hardware or is it some CPU p= in > connected somewhere on the motherboard or it's within the CPU and cannot = be > changed? I wonder if it's theoretically possible to re-enable it on an Ap= ple > G5 or we would likely never see a PowerPC 970 with HV enabled? I don't know, sorry. --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson --aznLbwQ42o7LEaqN Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEdfRlhq5hpmzETofcbDjKyiDZs5IFAl4VK7QACgkQbDjKyiDZ s5K9HBAAkw4grQvdH/ALPbJ6/ReJdsKg9vcurgX+1GS7+pnRr5NyeRZn4PPHDfok 8VHNaggDZOtBDH0RJK5I+pvl0eP+wHC7CzO4edbcvIJAeE9SydRJQ5sfuGQYxBEJ hkxCcOILUeW3aRBCFL9r5q25pVQcpX64mhX/RRzEEyakog3Urda79X/7TZPU1cQQ Otcc7XiByX8mIMkYVe58xEy5PyaW6m4cwOK/bWX6n/gpV2cpp5AEc9CkNSivpdR2 OIMFrUgy7nBZ+9WOyM34Ju1Hg4eA7lbmPaFK8RTpMsxud40siTscB2JOhp66r7U8 DWjWV9N3CegKFZuK91GNJ09FEoHpV7Y/EedRMoqCz7twFxDf61PjJPH1/8kacwov 6pGm6bDDPYex3yVHIZJXQX/UKihiE2NHwTv5As1PU9+1J0IT/kD1OxONYCd9p/Lw 77flWxUDGC0ImbXjS5tu3XklHIcgNYNa+0B4x3apnv7h4l1012nvbOabYe0MaOlD E5gSFNAgrnps16yRow2TO6X/VLcwz+qqWRLRXTGSgDxA9cKoLe3AajaPQoJaFDpJ Ndiz9E6jlSj5Dv/Gf2bM6U2hujnoHtBg3WZB6Zu2t1f+mjIH8Q17VDfZOW2kLq5Z /R4Kaz5/UcsC8LegkdEGfOw5DMEgg2BC+XQyC5sKO7fi0/ulO8c= =07Fc -----END PGP SIGNATURE----- --aznLbwQ42o7LEaqN--