From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 38495C48BE8 for ; Mon, 24 Jun 2019 04:31:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1B3A9213F2 for ; Mon, 24 Jun 2019 04:31:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726321AbfFXEbg (ORCPT ); Mon, 24 Jun 2019 00:31:36 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:34711 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726812AbfFXEbg (ORCPT ); Mon, 24 Jun 2019 00:31:36 -0400 X-Greylist: delayed 5399 seconds by postgrey-1.27 at vger.kernel.org; Mon, 24 Jun 2019 00:31:34 EDT Received: from p5b06daab.dip0.t-ipconnect.de ([91.6.218.171] helo=nanos) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1hfCnK-0000Kk-5Z; Mon, 24 Jun 2019 02:25:14 +0200 Date: Mon, 24 Jun 2019 02:25:12 +0200 (CEST) From: Thomas Gleixner To: Michael Kelley cc: Sasha Levin , Vincenzo Frascino , "linux-arch@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "linux-mips@vger.kernel.org" , "linux-kselftest@vger.kernel.org" , Catalin Marinas , Will Deacon , Arnd Bergmann , Russell King , Ralf Baechle , Paul Burton , Daniel Lezcano , Mark Salyzyn , Peter Collingbourne , Shuah Khan , Dmitry Safonov <0x7f454c46@gmail.com>, Rasmus Villemoes , Huw Davies , "linux-hyperv@vger.kernel.org" , Greg KH , Stephen Rothwell Subject: RE: [PATCH v6 18/19] x86: Add support for generic vDSO In-Reply-To: Message-ID: References: <20190530141531.43462-1-vincenzo.frascino@arm.com> <20190530141531.43462-19-vincenzo.frascino@arm.com> <20190614211710.GQ1513@sasha-vm> <20190623190929.GL2226@sasha-vm> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org On Mon, 24 Jun 2019, Michael Kelley wrote: > From: Thomas Gleixner Sent: Sunday, June 23, 2019 3:13 PM > > > > I have no objections if you collect hyper-v stuff, quite the contrary, but > > changes which touch other subsystems need to be coordinated upfront. That's > > all I'm asking for. > > > > Btw, that clocksource stuff looks good code wise, just the change logs need > > some care and after the VDSO stuff hits next we need to sort out the > > logistics. I hope these changes are completely self contained. If not we'll > > find a solution. > > > > In my view, the only thing that potentially needs a solution is where the > Hyper-V clock code used by VDSO ends up in the code tree. I think the > right long term place is include/clocksource/hyperv_timer.h. That location > is architecture neutral, and the same Hyper-V clock code will be shared by > the Hyper-V on ARM64 support that's in process. > > Vincenzo's patch set creates a new file arch/x86/include/asm/mshyperv-tsc.h, > which I will want to move when creating the separate Hyper-V clocksource > driver. If you're OK with that file existing for a release and then going away, > that's fine. Alternatively, put the code in include/clocksource/hyperv_timer.h > now as part of the VDSO patch set so it's in the right place from the start. My > subsequent patch set will add a few additional tweaks to remove x86-isms > and fully integrate with the separate Hyper-V clocksource driver. I don't care whether this goes into 5.3 or later. If you can provide me rebased self contained patches on top of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/vdso I'm happy to pull them in on top. Thanks, tglx