From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753238AbeERJtW (ORCPT ); Fri, 18 May 2018 05:49:22 -0400 Received: from foss.arm.com ([217.140.101.70]:46422 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752136AbeERJtU (ORCPT ); Fri, 18 May 2018 05:49:20 -0400 Subject: Re: [PATCH] arm: bcm2835: Add the PMU to the devicetree. To: Stefan Wahren , Peter Zijlstra , Florian Fainelli , Vince Weaver Cc: Ingo Molnar , linux-rpi-kernel@lists.infradead.org, Eric Anholt , Arnaldo Carvalho de Melo , Mark Rutland , bcm-kernel-feedback-list@broadcom.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org References: <20180517131727.29263-1-eric@anholt.net> <1412187220.62585.1526572780332@email.1und1.de> <307323036.63872.1526576126537@email.1und1.de> <20180517180758.GK12198@hirez.programming.kicks-ass.net> <0a643984-1586-8c56-6627-430f0c2a4ba8@gmail.com> <1863838560.56771.1526636258081@email.1und1.de> From: Marc Zyngier Organization: ARM Ltd Message-ID: <6097533d-5c77-0bba-a974-53ff65663dd3@arm.com> Date: Fri, 18 May 2018 10:49:17 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <1863838560.56771.1526636258081@email.1und1.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 18/05/18 10:37, Stefan Wahren wrote: > Hi Marc, > >> Marc Zyngier hat am 18. Mai 2018 um 10:07 geschrieben: >> >> I have a pretty simple series[1] which I used to profile 32bit guests on >> an arm64 KVM host. Nobody really cared about it because running a 32bit >> kernel on 64bit HW is a bit odd, to say the least, and I'm probably the >> only one actually running 32bit VMs. >> >>> FWIW, Broadcom STB chips, even when 64-bit capable or often used with an >>> 32-bit ARM kernel, so having the ARMv8 PMUs work under a 32-bit ARM >>> kernel would be great. The downstream solution we have sued thus far is >>> to find the closest compatible string to represent those, which is not >>> great... >> Ah, so you're *really* doing that? I'm not going to ask why, I'm scared >> of the answer... ;-) >> >> Anyway, I can repost that series if that will prevent people from having >> that kind of silly hacks. > > yes please. But there is a minor nit: some patches introduce new files without SPDX tags. I'm shocked! ;-) M. -- Jazz is not dead. It just smells funny...