From patchwork Fri Dec 20 14:30:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Murray X-Patchwork-Id: 11305657 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ECE876C1 for ; Fri, 20 Dec 2019 14:33:12 +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 C980221D7E for ; Fri, 20 Dec 2019 14:33:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="sABL/zkm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C980221D7E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: 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: List-Owner; bh=/Ntai/YdZGczOrA6XMgyuFOkA8rg6uqS17TotRccs44=; b=sABL/zkmr3bC7A r3a6wmuZllPd5uVoERLKIIO0mlXAP+iBn4cPLYtsiMhMK++WqjRh8DJlZX3Trq3LvdeYa3Ov697va ZFSSRNZpzLqvLF9SZf6uCJ/nX2LSLSdsq165sIeyoq+75tyxYNWDOEyxM1jT54zZwiaAgfBQYsfUL H4pLxMLe7c1tMeAgfnYYoBTSVGQLPsMRu7I3HnD+6zESC1DjFQeCs7xuPe1bdW304FWOTYUI7K2PE 7MR3Bpm8pOsKzkrJ9cfffkWCziNdBpbRuFl0scmMywJ7gTXGKxkAh7r+gHeX4ufS1TsxByWwWsgwJ atxXeXNUXreq/2pBdnZg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iiJL5-0004Ce-2e; Fri, 20 Dec 2019 14:33:11 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iiJIv-0002B1-0B for linux-arm-kernel@lists.infradead.org; Fri, 20 Dec 2019 14:31:13 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6220030E; Fri, 20 Dec 2019 06:30:56 -0800 (PST) Received: from e119886-lin.cambridge.arm.com (unknown [10.37.6.20]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 89B8B3F718; Fri, 20 Dec 2019 06:30:54 -0800 (PST) From: Andrew Murray To: Marc Zyngier , Catalin Marinas , Will Deacon Subject: [PATCH v2 11/18] KVM: arm64: don't trap Statistical Profiling controls to EL2 Date: Fri, 20 Dec 2019 14:30:18 +0000 Message-Id: <20191220143025.33853-12-andrew.murray@arm.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191220143025.33853-1-andrew.murray@arm.com> References: <20191220143025.33853-1-andrew.murray@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191220_063057_115346_C019BC35 X-CRM114-Status: GOOD ( 10.28 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Sudeep Holla , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org As we now save/restore the profiler state there is no need to trap accesses to the statistical profiling controls. Let's unset the _TPMS bit. Signed-off-by: Andrew Murray --- arch/arm64/kvm/debug.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm64/kvm/debug.c b/arch/arm64/kvm/debug.c index 43487f035385..07ca783e7d9e 100644 --- a/arch/arm64/kvm/debug.c +++ b/arch/arm64/kvm/debug.c @@ -88,7 +88,6 @@ void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu) * - Performance monitors (MDCR_EL2_TPM/MDCR_EL2_TPMCR) * - Debug ROM Address (MDCR_EL2_TDRA) * - OS related registers (MDCR_EL2_TDOSA) - * - Statistical profiler (MDCR_EL2_TPMS/MDCR_EL2_E2PB) * * Additionally, KVM only traps guest accesses to the debug registers if * the guest is not actively using them (see the KVM_ARM64_DEBUG_DIRTY @@ -111,7 +110,6 @@ void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) */ vcpu->arch.mdcr_el2 = __this_cpu_read(mdcr_el2) & MDCR_EL2_HPMN_MASK; vcpu->arch.mdcr_el2 |= (MDCR_EL2_TPM | - MDCR_EL2_TPMS | MDCR_EL2_TPMCR | MDCR_EL2_TDRA | MDCR_EL2_TDOSA);