From: Dave.Martin@arm.com (Dave Martin)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 0/3] MCPM/TC2 support for CPU powerdown synchronisation
Date: Mon, 30 Sep 2013 16:06:44 +0100 [thread overview]
Message-ID: <1380553607-3271-1-git-send-email-Dave.Martin@arm.com> (raw)
This series adds MCPM support for detecting when a CPU is safely powered
down, and provides an implementation for TC2.
This is sufficient to for working kexec with real power management on
TC2. To test it, you'll also need:
* CONFIG_KEXEC=y
* CONFIG_PROC_DEVICE_TREE=y
* CONFIG_MCPM=y
* CONFIG_ARCH_VEXPRESS_TC2_PM=y
* sufficiently new kexec-tools
(git://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git
v2.0.4 worked for me)
To prevent CPUs from running off into the weeds across kexec, this
series requires Lorenzo's patch
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-September/200917.html
(arm: vexpress: tc2: fix hotplug/idle/kexec race on cluster power down).
Dave Martin (3):
ARM: mcpm: Factor out logical-to-physical CPU translation
ARM: mcpm: Implement cpu_kill() to synchronise on powerdown
ARM: vexpress/TC2: Implement MCPM power_down_finish()
arch/arm/common/mcpm_entry.c | 5 ++++
arch/arm/common/mcpm_platsmp.c | 27 +++++++++++++++---
arch/arm/include/asm/mcpm.h | 31 ++++++++++++++++++++
arch/arm/mach-vexpress/spc.c | 39 +++++++++++++++++++++++++
arch/arm/mach-vexpress/spc.h | 1 +
arch/arm/mach-vexpress/tc2_pm.c | 60 +++++++++++++++++++++++++++++++++++----
6 files changed, 154 insertions(+), 9 deletions(-)
--
1.7.9.5
next reply other threads:[~2013-09-30 15:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-30 15:06 Dave Martin [this message]
2013-09-30 15:06 ` [RFC PATCH 1/3] ARM: mcpm: Factor out logical-to-physical CPU translation Dave Martin
2013-09-30 16:51 ` Nicolas Pitre
2013-09-30 15:06 ` [RFC PATCH 2/3] ARM: mcpm: Implement cpu_kill() to synchronise on powerdown Dave Martin
2013-09-30 17:00 ` Nicolas Pitre
2013-09-30 17:20 ` Dave Martin
2013-09-30 17:32 ` Nicolas Pitre
2013-09-30 15:06 ` [RFC PATCH 3/3] ARM: vexpress/TC2: Implement MCPM power_down_finish() Dave Martin
2013-09-30 17:14 ` Nicolas Pitre
2013-09-30 17:26 ` Dave Martin
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