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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AEC13C43458 for ; Mon, 6 Jul 2026 18:28:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=+aIUat1jATCZ6Y0HWmZRfqf3fPfOHunP2DqpN7t2mWI=; b=2SUb6KyTEgIxxolOouDEZKEy40 ddA7QGLYmfo2sQUxSm7tsjwGZ3RBt2Y9qNmWPjXPQyW1x9Fmcf7ha8ZQnZOd8mZtJt+TGE3rxL9mp 6RAjZ6tADXMC2AoFpLnDUuVUSGJBwAG+m2gnTGrIVk21404dbXO2m30ITvpZTyeDqQaosgHpTSvsB lqTGlsRoBRCObsRg1iHGlxsZg9huqFeZ4Py+ck66op2khjr+1I/xbo/LnccUlzUj/sgKr65xRRkfI VlRLmca+XUheyyfjxK0KxyQQy/449IoLwXB0gnDA5sTnxYOmBlgmp5MXWoreoORsNPRV3RrJwXTdW w1mZETFA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wgo3L-0000000DLSz-3fQs; Mon, 06 Jul 2026 18:28:23 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wgo3K-0000000DLSS-2gPq for linux-arm-kernel@lists.infradead.org; Mon, 06 Jul 2026 18:28:22 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 59803404A5; Mon, 6 Jul 2026 18:28:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EE1851F000E9; Mon, 6 Jul 2026 18:28:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783362502; bh=+aIUat1jATCZ6Y0HWmZRfqf3fPfOHunP2DqpN7t2mWI=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=OtEwGHPJb9dNat2pDDCdWaRNwPuhB79FT/k4d7QeHvuOpngT7uk2YJXIpwxRU7dSg hL7ucRIloAeRfJyWtxjsIMObTY7Ur5FgnUBD0MNnBdPcrrvqwf/CuQk7iTWvgdUEkl if+rWtqzNlxH/rQ6PYRip0/b/3RlnA/B/z4ZhPV50WrvewSrTwxscvXYFeOR2orJau ssmhBD5FkRnAut7zPu6ciMjVNxD2mTeRWqXc/iuPleBVPDsuP1NjkDLSmFK+9ehpuj H3zvnlwueIcKxIbpoT0tdcA+Wu9pae7LIKouhwFaHjOuLzd9eh939HFMuTvUivL2VU jp6qcVhrimzdA== Date: Mon, 6 Jul 2026 11:28:20 -0700 From: Oliver Upton To: Akihiko Odaki Cc: Marc Zyngier , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Kees Cook , "Gustavo A. R. Silva" , Paolo Bonzini , Jonathan Corbet , Shuah Khan , Shuah Khan , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, devel@daynix.com, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH v8 0/7] KVM: arm64: PMU: Use multiple host PMUs Message-ID: References: <20260706-hybrid-v8-0-de459617b59d@rsg.ci.i.u-tokyo.ac.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260706-hybrid-v8-0-de459617b59d@rsg.ci.i.u-tokyo.ac.jp> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Jul 06, 2026 at 07:03:23PM +0900, Akihiko Odaki wrote: > Akihiko Odaki (7): > KVM: arm64: Disallow vPMU when pPMUs do not cover all CPUs > KVM: arm64: PMU: Protect the list of PMUs with RCU > KVM: arm64: PMU: Pass the pPMU to kvm_map_pmu_event() > KVM: arm64: PMU: Pass the target CPU to kvm_pmu_probe_armpmu() > KVM: arm64: PMU: Implement fixed-counters-only emulation > KVM: arm64: PMU: Introduce FIXED_COUNTERS_ONLY > KVM: arm64: selftests: Test PMU_V3_FIXED_COUNTERS_ONLY Thanks for respinning the series, I left some comments. I'd really like to get this feature picked up, hope you have cycles to work on it soon. FWIW, we're considering adding a new vCPU feature flag to deprecate all the ugliness of the old PMUv3 UAPI. I'm tempted to say that the FIXED_COUNTERS_ONLY feature is conditioned on the new feature flag... https://lore.kernel.org/kvmarm/20260702190421.420992-1-congkai@amazon.com/ Thanks, Oliver