Messages in this thread | | | From | Sudeep KarkadaNagesha <> | Subject | [PATCH v3 0/6] ARM/ARM64 architected timer updates | Date | Tue, 13 Aug 2013 18:29:38 +0100 |
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From: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
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
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