From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53313) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XK7XD-0004DM-01 for qemu-devel@nongnu.org; Wed, 20 Aug 2014 11:10:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XK7X6-0001xF-Nh for qemu-devel@nongnu.org; Wed, 20 Aug 2014 11:10:46 -0400 Received: from mail-bn1blp0185.outbound.protection.outlook.com ([207.46.163.185]:26088 helo=na01-bn1-obe.outbound.protection.outlook.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XK7X6-0001wo-Gc for qemu-devel@nongnu.org; Wed, 20 Aug 2014 11:10:40 -0400 Message-ID: <53F4B9D7.7010409@amd.com> Date: Wed, 20 Aug 2014 10:08:07 -0500 From: Joel Schopp MIME-Version: 1.0 References: <20140819213304.19537.2834.stgit@joelaarch64.amd.com> In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH] aarch64: raise max_cpus to 8 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Maydell Cc: QEMU Developers On 08/19/2014 05:43 PM, Peter Maydell wrote: > On 19 August 2014 22:33, Joel Schopp wrote: >> I'm running on a system with 8 cpus and it would be nice to have qemu >> support all of them. The attached patch does that and has been tested. >> >> That said, I'm not sure if 8 is enough or if we want to bump this even higher >> now before systems with many more cpus come along. 255 anyone? > 8 is the limit for a GICv2 system. But yes, we could have 8 CPUs > here; I think this was just copied over from the vexpress boards > (which have 4 because that hardware has 4.) So the question is do we want to wait for the GICv3 changes to be merged to bump this to 255? If we do want to wait then applying my patch that bumps it to 8 is the right thing to do now. -Joel