[PATCH v3 0/5] Support userspace irqchip with arch timers

[Marc Zyngier]

On 05/04/17 10:28, Christoffer Dall wrote:
> This series is the second version of the rework of the patches to support
> architected timers with a userspace irqchip sent by Alexander Graf [1].
> 
> We first cleanup some of the timer code to make it easier to understand
> what is being done in the later patches, and then define the ABI,
> implement timers support, implement PMU support, and finally advertise
> the features.
> 
> These patches are based on the recent work from Jintack to support the
> physical timer in addition to the virtual timer.  This series including
> its dependencies can be found here:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/cdall/linux.git irqs-to-user-v3
> 
> I tested this using Alex's QEMU patch with his fixes for SMP applied.  This
> seems to be rock-solid.  The temporary-not-for-upstream-but-for-testing patch
> can be found here (force-pushed and rebased since v2):
> 
> https://git.linaro.org/people/christoffer.dall/qemu-arm.git no-kvm-irqchip
> 
> I also tested it on 32-bit and it looks good there as well.
> 
> Changes since v2:
>  - Actually push the right content to the kernel branch, sorry.
>  - Rebased on kvmarm/queue as of this morning (v4.11-rc1+ stuff)
>  - Changed IOCTL numbers as needed
> 
> Changes since v1:
>  - Rework the ABI to support devices in general as opposed to just
>    timers
>  - Support the PMU in addition to timers
>  - Also support the physical timer (rebased on Jintack's work)
>  - Updated some comments where I noticed things were out of date.
> 
> Several changes have been made compared to v7 of the original single
> patch, including:
>  - Rewording ABI documentation to be more in line with the ARM
>    architecture
>  - Add an explicit check for needing to notify userspace of a level
>    change instead of propagating the value
>  - Changes to commenting throughout to more accurately describe the
>    architecture concepts we try to maintain
>  - Reword of functions, for example from sync to update when the date
>    only flows one direction
> 
> [1]: https://lists.cs.columbia.edu/pipermail/kvmarm/2016-September/021867.html
> [2]: git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git next

The couple of nits I mentioned notwithstanding, for the whole series:

Reviewed-by: Marc Zyngier <marc.zyngier at arm.com>

	M.
-- 
Jazz is not dead. It just smells funny...