From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mario Smarduch Subject: Re: its_alloc_tables() - with all BASER marked none Date: Thu, 15 Oct 2015 10:08:19 -0700 Message-ID: <561FDD83.1030902@samsung.com> References: <561F01B8.9060700@samsung.com> <561F5ACA.30105@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 6B55542ACE for ; Thu, 15 Oct 2015 13:06:06 -0400 (EDT) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lIkCNkROJlBS for ; Thu, 15 Oct 2015 13:06:02 -0400 (EDT) Received: from usmailout4.samsung.com (mailout4.w2.samsung.com [211.189.100.14]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 4CC1141973 for ; Thu, 15 Oct 2015 13:06:01 -0400 (EDT) Received: from uscpsbgex4.samsung.com (u125.gpu85.samsung.co.kr [203.254.195.125]) by usmailout4.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0NW900EAOU9W6Z90@usmailout4.samsung.com> for kvmarm@lists.cs.columbia.edu; Thu, 15 Oct 2015 13:08:20 -0400 (EDT) In-reply-to: <561F5ACA.30105@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: Marc Zyngier , "kvmarm@lists.cs.columbia.edu" List-Id: kvmarm@lists.cs.columbia.edu On 10/15/2015 12:50 AM, Marc Zyngier wrote: > On 15/10/15 02:30, Mario Smarduch wrote: >> If its_init()/its_probe()/its_alloc_tables() finds all GITS_BASER type none, it >> continues with ITS initialization. >> >> Is there a reason to continue? > > Of course. There is nothing that *mandates* the ITS to request memory > from the operating system. The HW could perfectly come with its own > memory and not need anything at all. > >> Started to look through this code recently - little confused here. > > Only the beginning! ;-) Well at this time the beginning of console freeze close to "ITS: using cache flushing for cmd queue". Poked around CBASER and noticed Inner cache bits are updated but not sticky so it got me wondering. Appears like I need to look elsewhere, like maybe my environment. Thanks for clarifying. - Mario > > M. >