[PATCH v2 0/4] Hot plug support for the Armada 38x SoCs
jason at lakedaemon.net
Fri Nov 21 18:40:52 PST 2014
On Thu, Oct 30, 2014 at 12:39:40PM +0100, Gregory CLEMENT wrote:
> This patch set is the second version of the series adding the hot plug
> and also kexec support for the Armada 38x Socs.
> If nobody object we could push them in linux-next.
> The first patch was done in order to have the same code between Armada
> XP and the Cortex A9 based mvebu SoCs. In order to ensure the the
> backward compatibility for the device tree, it is only a preliminary
> work for it.
> The second patch moves the SCU power up sequence in a dedicated
> assembly function. It was done in order to reuse it in the 3rd patch.
> The third patch fixes the secondary startup for the cortex A9 mvebu
> SoC. Indeed, the initial code was written with the assumption the SCU
> will be always power on, which is not only true especially in the
> kexec case.
> These 2 patches may worth to be pushed to the stable kernel.
> Then the last patch adds the CPU hotplug support for Armada 38x. I
> tested the hotplug using the /sys/devices/system/cpu/cpu1/online
> virtual file. I also tested the kexec feature and managed to switch
> to a new kernel using kexec.
> v1 -> v2:
> - Fix typo and improve the comment explaining why we need to keep the
> .smp filed in the 1st patch.
> - Add a prefix to the function power_up_scu function to keep it
> private and not "pollute" the global namespace.
> Gregory CLEMENT (4):
> ARM: mvebu: Clean-up the Armada XP support
> ARM: mvebu: Move SCU power up in a function
> ARM: mvebu: Fix the secondary startup for Cortex A9 SoC
> ARM: mvebu: Implement the CPU hotplug support for the Armada 38x SoCs
> arch/arm/mach-mvebu/armada-370-xp.h | 6 -----
> arch/arm/mach-mvebu/board-v7.c | 5 ++++
> arch/arm/mach-mvebu/coherency.c | 1 -
> arch/arm/mach-mvebu/cpu-reset.c | 1 -
> arch/arm/mach-mvebu/headsmp-a9.S | 1 +
> arch/arm/mach-mvebu/platsmp-a9.c | 53 +++++++++++++++++++++++++++++++++++--
> arch/arm/mach-mvebu/platsmp.c | 2 ++
> arch/arm/mach-mvebu/pmsu.c | 3 +--
> arch/arm/mach-mvebu/pmsu.h | 2 ++
> arch/arm/mach-mvebu/pmsu_ll.S | 20 +++++++++-----
> 10 files changed, 75 insertions(+), 19 deletions(-)
Applied to mvebu/soc with Thomas' Reviewed-by and Tested-by.
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