From: paul.gortmaker@windriver•com (Paul Gortmaker)
To: linux-arm-kernel@lists•infradead.org
Subject: [RFC PATCH 0/5] arm64: initial CPU_HOTPLUG support
Date: Mon, 15 Jul 2013 09:25:13 -0400 [thread overview]
Message-ID: <51E3F839.4010900@windriver.com> (raw)
In-Reply-To: <20130715104706.GA14505@e106331-lin.cambridge.arm.com>
On 13-07-15 06:47 AM, Mark Rutland wrote:
> Hi Catalin, Paul,
>
> I've realised these patches are going to conflict with Paul's "arm64:
> delete __cpuinit usage from all users", so I'd like to rebase this
> series atop of it (removing my cpuinit additions as I do so).
>
> Catalin, would you be happy to create a stable branch at some point soon
> with Paul's arm64 patch for me to work atop of?
Now that 3.11-rc1 is out, I'll be sending a pull request
for phase two of the removal, including the arm64 patch,
so that should be mainline very shortly.
Paul.
--
>
> Thanks,
> Mark.
>
> On Wed, Jul 10, 2013 at 11:11:14PM +0100, Mark Rutland wrote:
>> The following patches add basic CPU_HOTPLUG support to arm64, which
>> combined with appropriate firmware (e.g. [1]) can be used to power CPUs
>> up and down dynamically. From discussions at connect it seemed that
>> several people were interested in working in this area, so I thought I'd
>> make my current implementation public now that I've managed to regain
>> access to my inbox.
>>
>> I've tested this series with the bootwrapper PSCI implementation I've
>> placed on linux-arm.org [1] and a modified foundation model dts with a
>> psci node and each CPU's enable-method set to "psci", using a shell
>> while repeatedly cycling all cpus off and on:
>>
>> for C in $(seq 0 3); do
>> ./cyclichotplug.sh $C >/dev/null 2>&1 &
>> done
>>
>> ---->8----
>> #!/bin/sh
>> # cyclichotplug.sh
>>
>> CPU=$1;
>>
>> if [ -z "$CPU" ]; then
>> printf "Usage: $0 <cpu id>\n";
>> exit 1;
>> fi
>>
>> ONLINEFILE=/sys/devices/system/cpu/cpu$CPU/online;
>>
>> while true; do
>> echo 0 > $ONLINEFILE;
>> echo 1 > $ONLINEFILE;
>> done
>> ---->8----
>>
>> Patches are based on v3.10.
>>
>> Thanks,
>> Mark.
>>
>> [1] http://linux-arm.org/git?p=boot-wrapper-aarch64.git;a=shortlog;h=refs/tags/simple-psci
>>
>> Mark Rutland (5):
>> arm64: reorganise smp_enable_ops
>> arm64: factor out spin-table boot method
>> arm64: read enable-method for CPU0
>> arm64: add CPU_HOTPLUG infrastructure
>> arm64: add PSCI CPU_OFF-based hotplug support
>>
>> arch/arm64/Kconfig | 7 ++
>> arch/arm64/include/asm/irq.h | 1 +
>> arch/arm64/include/asm/smp.h | 37 +++++--
>> arch/arm64/kernel/cputable.c | 2 +-
>> arch/arm64/kernel/head.S | 12 +-
>> arch/arm64/kernel/irq.c | 61 ++++++++++
>> arch/arm64/kernel/process.c | 7 ++
>> arch/arm64/kernel/smp.c | 215 ++++++++++++++++++++++--------------
>> arch/arm64/kernel/smp_psci.c | 54 +++++++--
>> arch/arm64/kernel/smp_spin_table.c | 85 +++++++++++++-
>> arch/arm64/kernel/vmlinux.lds.S | 1 -
>> 11 files changed, 375 insertions(+), 107 deletions(-)
>>
>> --
>> 1.7.9.5
>>
next prev parent reply other threads:[~2013-07-15 13:25 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-10 22:11 [RFC PATCH 0/5] arm64: initial CPU_HOTPLUG support Mark Rutland
2013-07-10 22:13 ` [RFC PATCH 1/5] arm64: reorganise smp_enable_ops Mark Rutland
2013-07-10 22:15 ` [RFC PATCH 2/5] arm64: factor out spin-table boot method Mark Rutland
2013-07-10 22:15 ` [RFC PATCH 3/5] arm64: read enable-method for CPU0 Mark Rutland
2013-07-10 22:15 ` [RFC PATCH 4/5] arm64: add CPU_HOTPLUG infrastructure Mark Rutland
2013-07-10 23:59 ` Russell King - ARM Linux
2013-07-11 9:33 ` Stephen Boyd
2013-07-11 11:10 ` Mark Rutland
2013-07-10 22:16 ` [RFC PATCH 5/5] arm64: add PSCI CPU_OFF-based hotplug support Mark Rutland
2013-07-11 15:10 ` [RFC PATCH 0/5] arm64: initial CPU_HOTPLUG support Hanjun Guo
2013-07-11 16:34 ` Mark Rutland
2013-07-19 11:09 ` Hanjun Guo
2013-07-15 10:47 ` Mark Rutland
2013-07-15 13:25 ` Paul Gortmaker [this message]
2013-07-15 13:45 ` Mark Rutland
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