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=-12.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 33D4DC07E96 for ; Tue, 13 Jul 2021 14:00:54 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 018556127C for ; Tue, 13 Jul 2021 14:00:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 018556127C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=v4RoQ3J2bC1yZRGyUly9DazskF4A4QHi3/fzEs/4j78=; b=RREDLdGDm32FHY vHvAxWby+iKYlMKBH7IN8WpSfCVtoKjgp/FPQM88o9oJntiRXtVbLgWkXUwrMgC89io3V51g/vBBZ L3BSb0d4iQPVxgD16/7XJuIdNKK48Yc89S7aKhEfcIMPo/oikbKmGd0e3CF8BUyVtIZF/zA+lBn6p 2h8AJRKNOkfb63c9samj82mOd79TPyyyDXIDeaxeVHRqLKfSoYY144ejlXi2naWaWFmmz6rAnb6AS Qa51xkBTLULEWbCy0IZ8A2OvMTVSAUV/3bSWqbPAkj0iCQGN5/lbFZo6cPrk3WqP4U0eSO3eDhJ5m 82Gq3rzJ0iEbw8frffUQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m3IwJ-00AcMR-1X; Tue, 13 Jul 2021 13:59:11 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m3IwF-00AcKs-5U for linux-arm-kernel@lists.infradead.org; Tue, 13 Jul 2021 13:59:08 +0000 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D6FFF61288; Tue, 13 Jul 2021 13:59:06 +0000 (UTC) Received: from sofa.misterjones.org ([185.219.108.64] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1m3IwC-00D5p8-Qf; Tue, 13 Jul 2021 14:59:04 +0100 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Cc: James Morse , Suzuki K Poulose , Alexandru Elisei , Alexandre Chartre , Robin Murphy , kernel-team@android.com Subject: [PATCH 0/3] kvm-arm64: Fix PMU reset values (and more) Date: Tue, 13 Jul 2021 14:58:57 +0100 Message-Id: <20210713135900.1473057-1-maz@kernel.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, alexandre.chartre@oracle.com, robin.murphy@arm.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210713_065907_338715_E7F55A7B X-CRM114-Status: GOOD ( 10.50 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi all, After some back and forth with Alexandre about patch #3 of this series, it became apparent that some of the PMU code paths perform some unnecessary masking, only to hide the fact that some of the PMU register reset values are not architecturally compliant (RES0 bits get set, among other things). The first patch of this series addresses the reset value problem, the second one rids us of the pointless masking, and Alexandre's patch (which depends on the first two) is slapped on top, with a small cosmetic change. Thanks, M. Alexandre Chartre (1): KVM: arm64: Disabling disabled PMU counters wastes a lot of time Marc Zyngier (2): KVM: arm64: Narrow PMU sysreg reset values to architectural requirements KVM: arm64: Drop unnecessary masking of PMU registers arch/arm64/kvm/pmu-emul.c | 8 +++--- arch/arm64/kvm/sys_regs.c | 52 ++++++++++++++++++++++++++++++++++----- 2 files changed, 50 insertions(+), 10 deletions(-) -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel