From patchwork Tue Nov 20 14:15:18 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Murray X-Patchwork-Id: 10690569 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 787AF13AD for ; Tue, 20 Nov 2018 15:56:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 661962A9BA for ; Tue, 20 Nov 2018 15:56:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5A7862AA19; Tue, 20 Nov 2018 15:56:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.6 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0C1442A9BA for ; Tue, 20 Nov 2018 15:56:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject: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=9+nvdb2a+BEwx/fLcYftmAjo1/uB9ZhfJHoQABUx0Y4=; b=iGZ ml3ul/GUloSLD7WoTbB/bJCy/ZPVIjIKuaI3keI5/7F2Ps0Bi9KVGO3ZT4H1RtzdoNYGM5c6fqghp oxrvfyppkXvrsY5teccOcouakJ+nR5+SStkXXqt3J7Rlx+x6kXy8SzWr45mbYLDzqc1E9Mk7+6w/m FKoRedyNX7iyNLgqLaF+J4Iib3WTg4vntSmHbg0NsgxO6ikX5yWB7ipn+PC5efU3fHyrcUMEGzNiz 6M2XFVEeAMOacc34ayoK0cSBCqbMAo24gEI2muKWBNi4YFOp4o9lKPOK5twqn4i+wkaQ8Eebz9Q80 L0tVcWVliLRePh9uiZruLOuELlyRurg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gP8NZ-00064J-9j; Tue, 20 Nov 2018 15:55:57 +0000 Received: from merlin.infradead.org ([205.233.59.134]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gP8Fs-0003nl-Sq for linux-arm-kernel@bombadil.infradead.org; Tue, 20 Nov 2018 15:48:00 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=Message-Id:Date:Subject:Cc:To:From: Sender:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=e7uFqcIt1C6yqXzLV5L6KZiElHC6u0hwQyS0sSkN0GQ=; b=pXZ1uoBsdW7nWr1ufBN2V/E5C vdV/FmraVJ68B1O6RxVWrxKZd8fq4D0olh3FoOavi2QHm+EeqsAJLqln9JTTYZ1TWy8J0ItapnHxb MRjmEwGPglxprLio+E+Xks99XSSv86b4KpcNXK7kwbTHRpnSELPGoSHd/jY+BSPCcFzc0CaBsrv9W JhL1hq4bpOVS0nCx/kQd/DEuRM7aRd0qdm2NjWgthBY3AeygDzPFsoTdShwE7+YIUCNBmrOxJAuZT tOPZ/3QajGPS/uTmOfd4JO6RrF4DDYm01yGWg0BOqsrap9u9kvECFyyEhaTK2XSIPS2tJ/ANxY3Sf XH6iA1E/Q==; Received: from foss.arm.com ([217.140.101.70]) by merlin.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gP6og-0008T4-4N for linux-arm-kernel@lists.infradead.org; Tue, 20 Nov 2018 14:15:54 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id F1A81EBD; Tue, 20 Nov 2018 06:15:37 -0800 (PST) Received: from e119886-lin.cambridge.arm.com (unknown [10.37.6.11]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 07EF03F5A0; Tue, 20 Nov 2018 06:15:35 -0800 (PST) From: Andrew Murray To: Christoffer Dall , Marc Zyngier , Catalin Marinas , Will Deacon , Mark Rutland Subject: [PATCH v2 0/4] arm64: Support perf event modifiers :G and :H Date: Tue, 20 Nov 2018 14:15:18 +0000 Message-Id: <1542723322-42536-1-git-send-email-andrew.murray@arm.com> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181120_091550_260099_E89BFE7C X-CRM114-Status: GOOD ( 12.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Julien Thierry , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, Suzuki K Poulose MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patchset provides support for perf event modifiers :G and :H which allows for filtering of PMU events between host and guests when used with KVM. As the underlying hardware cannot distinguish between guest and host context, the performance counters must be stopped and started upon entry/exit to the guest. This is performed at EL2 in a way that minimizes overhead and improves accuracy of recording events that only occur in the requested context. This has been tested with VHE and non-VHE kernels with a KVM guest. Changes from v1: - Removed unnecessary exclusion of EL1 with exclude_guest on VHE - Removed unnecessary isb from existing perf_event.c driver - Folded perf_event.c patches together - Added additional information to last patch commit message Andrew Murray (4): arm64: arm_pmu: remove unnecessary isb instruction arm64: KVM: add accessors to track guest/host only counters arm64: arm_pmu: Add support for exclude_host/exclude_guest attributes arm64: KVM: Enable support for :G/:H perf event modifiers arch/arm64/include/asm/kvm_host.h | 20 +++++++++++++++++++ arch/arm64/kernel/perf_event.c | 42 ++++++++++++++++++++++++++++++++------- arch/arm64/kvm/hyp/switch.c | 38 +++++++++++++++++++++++++++++++++++ 3 files changed, 93 insertions(+), 7 deletions(-)