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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC124C25B45 for ; Mon, 23 Oct 2023 18:35:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233412AbjJWSf5 (ORCPT ); Mon, 23 Oct 2023 14:35:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53730 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231449AbjJWSfw (ORCPT ); Mon, 23 Oct 2023 14:35:52 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4F09F101; Mon, 23 Oct 2023 11:35:49 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DFA2DC433C8; Mon, 23 Oct 2023 18:35:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1698086148; bh=WHd8d0jouAtFnRWy/nehrEIWGuiFo70FfejIW0lR98A=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=mlQCUgXeOkPMlnOORKfW4wTzAB9yX6aLvM8bFtJnCnu1mb5WFxPIBxUqj1qe4Qsh7 bu2yE1Vsr00HNYUm6H6MQLvvYST4rv/4fuyDKI3B8SykvQOzqK902lHfArSePy7ZuC hhO5V9fn8/QVlnILo2gLIbv+Q5iIMREzal9jg/45QPGdH85o862bpvaX1Ct9xGekDd rlRS4mn+z52AmZaw8sor+R+9QUh2XsfWoEfGe7RuknUp9bX4mVhaONDRp69UCSyFnN z6ABjEtA/6tBeMdpoTG/hPFGYmilsFUkl/9NFbexXXAhSIrmuTfUIy+ccq36aregQl t2L2eUwE8jDxw== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1quzmE-006x8t-7w; Mon, 23 Oct 2023 19:35:46 +0100 Date: Mon, 23 Oct 2023 19:35:44 +0100 Message-ID: <86r0ll4267.wl-maz@kernel.org> From: Marc Zyngier To: Raghavendra Rao Ananta Cc: Oliver Upton , Alexandru Elisei , James Morse , Suzuki K Poulose , Paolo Bonzini , Zenghui Yu , Shaoqin Huang , Jing Zhang , Reiji Watanabe , Colton Lewis , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: Re: [PATCH v8 00/13] KVM: arm64: PMU: Allow userspace to limit the number of PMCs on vCPU In-Reply-To: <20231020214053.2144305-1-rananta@google.com> References: <20231020214053.2144305-1-rananta@google.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/29.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: rananta@google.com, oliver.upton@linux.dev, alexandru.elisei@arm.com, james.morse@arm.com, suzuki.poulose@arm.com, pbonzini@redhat.com, yuzenghui@huawei.com, shahuang@redhat.com, jingzhangos@google.com, reijiw@google.com, coltonlewis@google.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 20 Oct 2023 22:40:40 +0100, Raghavendra Rao Ananta wrote: > > Hello, > > The goal of this series is to allow userspace to limit the number > of PMU event counters on the vCPU. We need this to support migration > across systems that implement different numbers of counters. FWIW, I've pushed out a branch[1] with a set of fixes that address some of the comments I had on this series. Feel free to squash them in your series as you see fit. M. [1] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=kvm-arm64/pmu_pmcr_n -- Without deviation from the norm, progress is not possible.