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| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2014-05-30 22:18:17 +0200 |
|---|---|---|
| committer | Jason Cooper <jason@lakedaemon.net> | 2014-06-21 00:31:47 +0000 |
| commit | 26337779465637b761624d9752f52d1ec88f71d9 (patch) | |
| tree | 9388a904c742cea91f5552b980b236034c6dc71d /arch/arm/mach-mvebu/Makefile | |
| parent | 8ea875e72d2dd66eea393f22c6bf4707f92f4a50 (diff) | |
| download | linux-26337779465637b761624d9752f52d1ec88f71d9.tar.gz | |
ARM: mvebu: implement CPU hotplug support for Armada XP
This commit implements CPU hotplug support for the Marvell Armada XP
platform. The CPU hotplug stub functions from hotplug.c are moved into
platsmp.c, as it doesn't make much sense to have a separate file just
for these two functions.
In addition, this commit:
* Implements the ->cpu_die() function of SMP operations by calling
armada_370_xp_pmsu_idle_enter() to enter the deep idle state for
CPUs going offline.
* Implements a dummy ->cpu_kill() function, simply needed for the
kernel to know we have CPU hotplug support.
* The armada_xp_boot_secondary() function makes sure to wake up the
CPU if waiting in deep idle state by sending an IPI. This is
because armada_xp_boot_secondary() is now used in two different
situations: for the initial boot of secondary CPUs (where CPU reset
deassert is used to wake up CPUs) and for CPU hotplug (where an IPI
is used to take CPU out of deep idle).
* At boot time, we exit from the idle state in the
->smp_secondary_init() hook.
This commit has been tested using CPU hotplug through sysfs
(/sys/devices/system/cpu/cpuX/online) and using kexec.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1401481098-23326-5-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'arch/arm/mach-mvebu/Makefile')
| -rw-r--r-- | arch/arm/mach-mvebu/Makefile | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile index db29c1dfe3c5..90bcd5327312 100644 --- a/arch/arm/mach-mvebu/Makefile +++ b/arch/arm/mach-mvebu/Makefile @@ -9,7 +9,6 @@ obj-y += system-controller.o mvebu-soc-id.o ifeq ($(CONFIG_MACH_MVEBU_V7),y) obj-y += cpu-reset.o board-v7.o coherency.o coherency_ll.o pmsu.o obj-$(CONFIG_SMP) += platsmp.o headsmp.o platsmp-a9.o headsmp-a9.o -obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o endif obj-$(CONFIG_MACH_DOVE) += dove.o |