| From: |
| Will Deacon <will-AT-kernel.org> |
| To: |
| linux-arm-kernel-AT-lists.infradead.org |
| Subject: |
| [PATCH 0/5] tick/broadcast: Allow per-cpu timers to be used instead of broadcast |
| Date: |
| Thu, 20 May 2021 19:47:00 +0100 |
| Message-ID: |
| <20210520184705.10845-1-will@kernel.org> |
| Cc: |
| linux-kernel-AT-vger.kernel.org, Will Deacon <will-AT-kernel.org>, Frederic Weisbecker <fweisbec-AT-gmail.com>, Thomas Gleixner <tglx-AT-linutronix.de>, Marc Zyngier <maz-AT-kernel.org>, Lorenzo Colitti <lorenzo-AT-google.com>, John Stultz <john.stultz-AT-linaro.org>, Stephen Boyd <sboyd-AT-kernel.org>, kernel-team-AT-android.com |
| Archive-link: |
| Article |
Hi all,
This patch series adds support for hardware where the per-cpu tick timer
cannot wake up from deep idle states (i.e. CLOCK_EVT_FEAT_C3STOP is set)
yet there is a secondary per-cpu timer which is generally less preferable
(i.e. slow to access) yet capable of delivering the wakeup.
The meat and potatoes are in patches 3 and 4, but since I've not hacked
on this part of the kernel before I would appreciate feedback on any of
the changes I'm proposing.
Cheers,
Will
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Lorenzo Colitti <lorenzo@google.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: kernel-team@android.com
--->8
Will Deacon (5):
tick/broadcast: Drop unneeded CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
guard
tick/broadcast: Split __tick_broadcast_oneshot_control() into a helper
tick/broadcast: Prefer per-cpu oneshot wakeup timers to broadcast
tick/broadcast: Program wakeup timer when entering idle if required
timer_list: Print name of per-cpu wakeup device
kernel/time/tick-broadcast.c | 135 ++++++++++++++++++++++++++++++-----
kernel/time/tick-common.c | 2 +-
kernel/time/tick-internal.h | 5 +-
kernel/time/timer_list.c | 11 ++-
4 files changed, 133 insertions(+), 20 deletions(-)
--
2.31.1.818.g46aad6cb9e-goog
