From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45009) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dIaad-0000gS-B5 for qemu-devel@nongnu.org; Wed, 07 Jun 2017 09:01:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dIaaX-0000sz-Vc for qemu-devel@nongnu.org; Wed, 07 Jun 2017 09:01:35 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36150) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dIaaX-0000sB-PR for qemu-devel@nongnu.org; Wed, 07 Jun 2017 09:01:29 -0400 References: <1496404254-17429-1-git-send-email-peterx@redhat.com> <1496404254-17429-3-git-send-email-peterx@redhat.com> <20170602194523-mutt-send-email-mst@kernel.org> <20170605030725.GF4056@pxdev.xzpeter.org> <20170606234705.GG13397@umbus.fritz.box> From: Paolo Bonzini Message-ID: <176bbaed-3eb1-1ca5-95fc-dbf2a1168f1b@redhat.com> Date: Wed, 7 Jun 2017 15:01:23 +0200 MIME-Version: 1.0 In-Reply-To: <20170606234705.GG13397@umbus.fritz.box> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] [PATCH 2/3] exec: simplify address_space_get_iotlb_entry List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: David Gibson Cc: Peter Xu , "Michael S. Tsirkin" , qemu-devel@nongnu.org, Maxime Coquelin , Jason Wang On 07/06/2017 01:47, David Gibson wrote: >> I would ask David. There are PowerPC MMUs that allow fast lookup of >> arbitrarily-sized windows (not necessarily power of two), > > Uh.. I'm not sure what you mean here. You might be thinking of the > BATs which really old (32-bit) PowerPC MMUs had - those allow > arbitrary large block translations, but they do have to be a power of > two. Oh, that is what I was thinking about. Thanks for figuring out! :) Paolo