Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759039Ab3HMRaD (ORCPT ); Tue, 13 Aug 2013 13:30:03 -0400 Received: from service87.mimecast.com ([91.220.42.44]:45603 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758325Ab3HMR3z (ORCPT ); Tue, 13 Aug 2013 13:29:55 -0400 From: Sudeep KarkadaNagesha To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Sudeep.KarkadaNagesha@arm.com, Lorenzo Pieralisi , Catalin Marinas , Will Deacon , Thomas Gleixner , Daniel Lezcano , Sudeep KarkadaNagesha Subject: [PATCH v3 0/6] ARM/ARM64 architected timer updates Date: Tue, 13 Aug 2013 18:29:38 +0100 Message-Id: <1376414984-14182-1-git-send-email-Sudeep.KarkadaNagesha@arm.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1374492082-13686-1-git-send-email-Sudeep.KarkadaNagesha@arm.com> References: <1374492082-13686-1-git-send-email-Sudeep.KarkadaNagesha@arm.com> X-OriginalArrivalTime: 13 Aug 2013 17:29:50.0532 (UTC) FILETIME=[B6FC6840:01CE984A] X-MC-Unique: 113081318295300201 Content-Type: text/plain; charset=WINDOWS-1252 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id r7DHViTN000822 Content-Length: 2300 Lines: 58 From: Sudeep KarkadaNagesha This patch series adds support to configure the rate and enable the event stream for architected timer. The event streams can be used to impose a timeout on a WFE, to safeguard against any programming error in case an expected event is not generated or even to implement wfe-based timeouts for userspace locking implementations. Since the timer control register is reset to zero on warm boot, CPU PM notifier is added to re-initialize it. Changes v2->v3: 1. Moved ARM and ARM64 changes into separate patches 2. Added native hwcaps definations(ARM/ARM64) and compat-specific definitions(ARM64) to the users for the event stream feature. Changes v1->v2: 1. Saved event stream divider value on cold reset path and re-used it in CPU PM notifier instead of calculating every time. 2. Rebased on v3.11-rc2(to avoid conflicts with __cpuinit* deletion) 3. Dropped "ARM/ARM64: arch_timer: remove __cpuinit attribute for arch_counter_set_user_access"(already done as part of __cpuinit* deletion) Regards, Sudeep Sudeep KarkadaNagesha (5): ARM/ARM64: arch_timer: add macros for bits in control register ARM: arch_timer: configure and enable event stream ARM64: arch_timer: configure and enable event stream drivers: clocksource: enable hwcaps for event stream on ARM arch timer drivers: clocksource: add CPU PM notifier for ARM architected timer Will Deacon (1): drivers: clocksource: configure event stream for ARM arch timer arch/arm/include/asm/arch_timer.h | 18 +++++++++++--- arch/arm/include/uapi/asm/hwcap.h | 1 + arch/arm/kernel/setup.c | 1 + arch/arm64/include/asm/arch_timer.h | 22 +++++++++++++---- arch/arm64/include/asm/hwcap.h | 4 ++- arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/kernel/setup.c | 1 + drivers/clocksource/arm_arch_timer.c | 48 +++++++++++++++++++++++++++++++++++- include/clocksource/arm_arch_timer.h | 10 ++++++++ 9 files changed, 96 insertions(+), 10 deletions(-) -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/