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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 56034C433E1 for ; Tue, 25 Aug 2020 12:52:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 32CA72075F for ; Tue, 25 Aug 2020 12:52:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727783AbgHYMwr (ORCPT ); Tue, 25 Aug 2020 08:52:47 -0400 Received: from foss.arm.com ([217.140.110.172]:58142 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726784AbgHYMwq (ORCPT ); Tue, 25 Aug 2020 08:52:46 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2D8B41FB; Tue, 25 Aug 2020 05:52:46 -0700 (PDT) Received: from C02TD0UTHF1T.local (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 258963F66B; Tue, 25 Aug 2020 05:52:44 -0700 (PDT) Date: Tue, 25 Aug 2020 13:52:30 +0100 From: Mark Rutland To: Steven Price Cc: Marc Zyngier , Keqian Zhu , kvm@vger.kernel.org, Catalin Marinas , linux-kernel@vger.kernel.org, Will Deacon , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Subject: Re: [RFC PATCH 0/5] KVM: arm64: Add pvtime LPT support Message-ID: <20200825125230.GA33677@C02TD0UTHF1T.local> References: <20200817084110.2672-1-zhukeqian1@huawei.com> <8308f52e4c906cad710575724f9e3855@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 19, 2020 at 09:54:40AM +0100, Steven Price wrote: > On 18/08/2020 15:41, Marc Zyngier wrote: > > On 2020-08-17 09:41, Keqian Zhu wrote: > We are discussing (re-)releasing the spec with the LPT parts added. If you > have fundamental objections then please me know. Like Marc, I argued strongly for the removal of the LPT bits on the premise that it didn't really work (e.g. when transistioning between SW agents) and so it was a pure maintenance burden. I don't think the technical arguments have changed, and I don't think it's a good idea to try to ressurect this. Please rope me in if this comes up in internal discussions. Mark. 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Tue, 25 Aug 2020 05:52:44 -0700 (PDT) Date: Tue, 25 Aug 2020 13:52:30 +0100 From: Mark Rutland To: Steven Price Subject: Re: [RFC PATCH 0/5] KVM: arm64: Add pvtime LPT support Message-ID: <20200825125230.GA33677@C02TD0UTHF1T.local> References: <20200817084110.2672-1-zhukeqian1@huawei.com> <8308f52e4c906cad710575724f9e3855@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200825_085251_151759_F4AD597D X-CRM114-Status: GOOD ( 12.94 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, Marc Zyngier , Keqian Zhu , linux-kernel@vger.kernel.org, Catalin Marinas , Will Deacon , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gV2VkLCBBdWcgMTksIDIwMjAgYXQgMDk6NTQ6NDBBTSArMDEwMCwgU3RldmVuIFByaWNlIHdy b3RlOgo+IE9uIDE4LzA4LzIwMjAgMTU6NDEsIE1hcmMgWnluZ2llciB3cm90ZToKPiA+IE9uIDIw MjAtMDgtMTcgMDk6NDEsIEtlcWlhbiBaaHUgd3JvdGU6Cgo+IFdlIGFyZSBkaXNjdXNzaW5nIChy ZS0pcmVsZWFzaW5nIHRoZSBzcGVjIHdpdGggdGhlIExQVCBwYXJ0cyBhZGRlZC4gSWYgeW91Cj4g aGF2ZSBmdW5kYW1lbnRhbCBvYmplY3Rpb25zIHRoZW4gcGxlYXNlIG1lIGtub3cuCgpMaWtlIE1h cmMsIEkgYXJndWVkIHN0cm9uZ2x5IGZvciB0aGUgcmVtb3ZhbCBvZiB0aGUgTFBUIGJpdHMgb24g dGhlCnByZW1pc2UgdGhhdCBpdCBkaWRuJ3QgcmVhbGx5IHdvcmsgKGUuZy4gd2hlbiB0cmFuc2lz dGlvbmluZyBiZXR3ZWVuIFNXCmFnZW50cykgYW5kIHNvIGl0IHdhc8KgYSBwdXJlIG1haW50ZW5h bmNlIGJ1cmRlbi4KCkkgZG9uJ3QgdGhpbmsgdGhlIHRlY2huaWNhbCBhcmd1bWVudHMgaGF2ZSBj aGFuZ2VkLCBhbmQgSSBkb24ndCB0aGluawppdCdzIGEgZ29vZCBpZGVhIHRvIHRyeSB0byByZXNz dXJlY3QgdGhpcy4gUGxlYXNlIHJvcGUgbWUgaW4gaWYKdGhpcyBjb21lcyB1cCBpbiBpbnRlcm5h bCBkaXNjdXNzaW9ucy4KCk1hcmsuCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2Vy bmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1h bi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==