From patchwork Thu Nov 22 11:25:46 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Murray X-Patchwork-Id: 10693945 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 5EAAD13BB for ; Thu, 22 Nov 2018 11:26:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4AA6C2BF45 for ; Thu, 22 Nov 2018 11:26:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3A19A2C381; Thu, 22 Nov 2018 11:26:56 +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 C4BB32BF45 for ; Thu, 22 Nov 2018 11:26:55 +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=h4OZoWDc5lDNX31JYZlFoXD7S/WFsASwwY7U+iC0hKg=; b=YYy GHwmlXYEDknTaTB2CSJkhLQ/I4Tl0TN4m7ggNz9ggJEdm5pRH8L/ThdjEp7CNXxRJHT7kKnuKlliF pEdM7pYM0fi8FQot0ALw85DROEfi178r+s207BpO/FMlpjIMAgseGhofgfD4jrk+fZKgQFstEqMyB G/nNgTAhXF6V+Sy+WmKQB9jOJdediXv5Vcp1NkKEECH/lgdxX80VLjjH6wi7xpQIxe+LakAbNochK 9qnofnW4HMBW979QsKDFVgcLgfmmPDpBP4BpXK+OeQLQGN6nlZrE6IZE5LeP2hrMITEC/TWnmmshT Rt+qcebl1Oam1leMIjKtynYhq+4YaJA==; 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 1gPn8D-0007uv-AN; Thu, 22 Nov 2018 11:26:49 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gPn7b-00079j-5Q for linux-arm-kernel@lists.infradead.org; Thu, 22 Nov 2018 11:26:13 +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 4B38D3617; Thu, 22 Nov 2018 03:25:57 -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 5D8DD3F5A0; Thu, 22 Nov 2018 03:25:55 -0800 (PST) From: Andrew Murray To: Christoffer Dall , Marc Zyngier , Catalin Marinas , Will Deacon , Mark Rutland Subject: [PATCH v3 0/4] arm64: Support perf event modifiers :G and :H Date: Thu, 22 Nov 2018 11:25:46 +0000 Message-Id: <1542885950-23816-1-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-20181122_032611_206172_B060D609 X-CRM114-Status: GOOD ( 11.05 ) 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 v2: - Ensured that exclude_kernel works for guest - Removed unnecessary exclusion of EL2 with exclude_host on !VHE - Renamed kvm_clr_set_host_pmu_events to reflect args order - Added additional information to isb patch 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 | 53 +++++++++++++++++++++++++++++++++------ arch/arm64/kvm/hyp/switch.c | 38 ++++++++++++++++++++++++++++ 3 files changed, 103 insertions(+), 8 deletions(-)