From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Tue, 01 Nov 2016 12:50:20 +0100 (CET) Received: from mailapp01.imgtec.com ([195.59.15.196]:22973 "EHLO mailapp01.imgtec.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S23993115AbcKALuNvGbRo (ORCPT ); Tue, 1 Nov 2016 12:50:13 +0100 Received: from HHMAIL01.hh.imgtec.org (unknown [10.100.10.19]) by Forcepoint Email with ESMTPS id 7D7E4F2E255E7; Tue, 1 Nov 2016 11:50:03 +0000 (GMT) Received: from [10.20.78.238] (10.20.78.238) by HHMAIL01.hh.imgtec.org (10.100.10.21) with Microsoft SMTP Server id 14.3.294.0; Tue, 1 Nov 2016 11:50:05 +0000 Date: Tue, 1 Nov 2016 11:49:56 +0000 From: "Maciej W. Rozycki" To: Paul Burton CC: Ralf Baechle , , Subject: Re: [PATCH 3/4] MIPS: Fix ISA I/II FP signal context offsets In-Reply-To: <1814661.4I5xJD6gaP@np-p-burton> Message-ID: References: <1814661.4I5xJD6gaP@np-p-burton> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" X-Originating-IP: [10.20.78.238] Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 55637 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: macro@imgtec.com Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips On Tue, 1 Nov 2016, Paul Burton wrote: > BTW, do you have a feel for whether there's a good r2k/r3k platform (ideal > would be some software emulator if any are good enough) that we could hook up > to our continuous integration system? That would help us to catch any > regressions like this in future before they hit mainline. I know about no such platform I'm afraid. QEMU does not have the R2k/R3k exception/MMU/cache model and implementing that would be a considerable effort I see no volunteers for. I haven't heard of any other simulator which might be closer to implementing that model. As to using real hardware -- I might be the closest myself to be capable of doing some automated testing as I have an R3k machine in my home lab wired for remote control. It could track Ralf's `mips-for-linux-next' branch and watch out for regressions, by trying to build and boot kernels automatically on a regular basis; maybe doing some further validation even, such as running GCC or glibc regression testing. But while the target is ready I'm still missing the host-side setup, which I haven't completed. I don't think there's any other hardware readily available which could be hooked somewhere. So for the time being I think we need to continue relying on people spotting issues by hand. I think we've been doing pretty good overall. Thanks for your review. Maciej From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailapp01.imgtec.com ([195.59.15.196]:22973 "EHLO mailapp01.imgtec.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S23993115AbcKALuNvGbRo (ORCPT ); Tue, 1 Nov 2016 12:50:13 +0100 Date: Tue, 1 Nov 2016 11:49:56 +0000 From: "Maciej W. Rozycki" Subject: Re: [PATCH 3/4] MIPS: Fix ISA I/II FP signal context offsets In-Reply-To: <1814661.4I5xJD6gaP@np-p-burton> Message-ID: References: <1814661.4I5xJD6gaP@np-p-burton> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Return-Path: Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-subscribe: List-owner: List-post: List-archive: To: Paul Burton Cc: Ralf Baechle , linux-mips@linux-mips.org, linux-kernel@vger.kernel.org Message-ID: <20161101114956.DSBuH1ca09oQNmjU50l5MaIaW3D8hQMxu5pn0M-DdL0@z> On Tue, 1 Nov 2016, Paul Burton wrote: > BTW, do you have a feel for whether there's a good r2k/r3k platform (ideal > would be some software emulator if any are good enough) that we could hook up > to our continuous integration system? That would help us to catch any > regressions like this in future before they hit mainline. I know about no such platform I'm afraid. QEMU does not have the R2k/R3k exception/MMU/cache model and implementing that would be a considerable effort I see no volunteers for. I haven't heard of any other simulator which might be closer to implementing that model. As to using real hardware -- I might be the closest myself to be capable of doing some automated testing as I have an R3k machine in my home lab wired for remote control. It could track Ralf's `mips-for-linux-next' branch and watch out for regressions, by trying to build and boot kernels automatically on a regular basis; maybe doing some further validation even, such as running GCC or glibc regression testing. But while the target is ready I'm still missing the host-side setup, which I haven't completed. I don't think there's any other hardware readily available which could be hooked somewhere. So for the time being I think we need to continue relying on people spotting issues by hand. I think we've been doing pretty good overall. Thanks for your review. Maciej