On Fri, Feb 13, 2015 at 11:01:37PM +, Russell King - ARM Linux wrote:
> On Fri, Feb 13, 2015 at 09:44:50PM +, Magnus Damm wrote:
> > Also, based on the comment in mcpm_cpu_can_disable() it looks like the
> > PSCI hook may be executed once only with your change in place?
> > Hopefully PSCI
On Fri, Feb 13, 2015 at 11:01:37PM +, Russell King - ARM Linux wrote:
On Fri, Feb 13, 2015 at 09:44:50PM +, Magnus Damm wrote:
Also, based on the comment in mcpm_cpu_can_disable() it looks like the
PSCI hook may be executed once only with your change in place?
Hopefully PSCI is OK
Hi Russell,
On Fri, Feb 13, 2015 at 11:01 PM, Russell King - ARM Linux
wrote:
> On Fri, Feb 13, 2015 at 09:44:50PM +, Magnus Damm wrote:
>> Also, based on the comment in mcpm_cpu_can_disable() it looks like the
>> PSCI hook may be executed once only with your change in place?
>> Hopefully
Hi Russell,
On Fri, Feb 13, 2015 at 11:01 PM, Russell King - ARM Linux
li...@arm.linux.org.uk wrote:
On Fri, Feb 13, 2015 at 09:44:50PM +, Magnus Damm wrote:
Also, based on the comment in mcpm_cpu_can_disable() it looks like the
PSCI hook may be executed once only with your change in
On 02/13/15 15:01, Russell King - ARM Linux wrote:
> On Fri, Feb 13, 2015 at 09:44:50PM +, Magnus Damm wrote:
>> Also, based on the comment in mcpm_cpu_can_disable() it looks like the
>> PSCI hook may be executed once only with your change in place?
>> Hopefully PSCI is OK not being invoked
On Fri, Feb 13, 2015 at 10:57:04PM +, Russell King - ARM Linux wrote:
> On Fri, Feb 13, 2015 at 03:20:04PM -0500, Simon Horman wrote:
> > > -static int r8a7779_cpu_disable(unsigned int cpu)
> > > -{
> > > - /* only CPU1->3 have power domains, do not allow hotplug of CPU0 */
> > > - return cpu
On Fri, Feb 13, 2015 at 09:44:50PM +, Magnus Damm wrote:
> Also, based on the comment in mcpm_cpu_can_disable() it looks like the
> PSCI hook may be executed once only with your change in place?
> Hopefully PSCI is OK not being invoked for every CPU shutdown.
This is why I've said (in the
On Fri, Feb 13, 2015 at 08:54:22PM +, Magnus Damm wrote:
> Thanks for your efforts. Can you please tell me where that limitation
> is located? I'm quite sure I've brought CPU cores up and down
> including CPU0, but maybe something is missing?
If you don't provide a cpu_disable function, by
On Fri, Feb 13, 2015 at 03:20:04PM -0500, Simon Horman wrote:
> > -static int r8a7779_cpu_disable(unsigned int cpu)
> > -{
> > - /* only CPU1->3 have power domains, do not allow hotplug of CPU0 */
> > - return cpu == 0 ? -EPERM : 0;
> > -}
...
> Its not clear to me why r8a7779_cpu_disable()
Hi Stephen,
On Fri, Feb 13, 2015 at 8:59 PM, Stephen Boyd wrote:
> On 02/13/15 12:54, Magnus Damm wrote:
>> Hi Stephen,
>>
>> On Fri, Feb 13, 2015 at 8:23 PM, Stephen Boyd wrote:
>>> On 02/13/15 12:20, Simon Horman wrote:
Hi Stephen,
On Fri, Feb 13, 2015 at 10:06:39AM -0800,
On 02/13/15 12:54, Magnus Damm wrote:
> Hi Stephen,
>
> On Fri, Feb 13, 2015 at 8:23 PM, Stephen Boyd wrote:
>> On 02/13/15 12:20, Simon Horman wrote:
>>> Hi Stephen,
>>>
>>> On Fri, Feb 13, 2015 at 10:06:39AM -0800, Stephen Boyd wrote:
diff --git a/arch/arm/mach-shmobile/smp-r8a7779.c
Hi Stephen,
On Fri, Feb 13, 2015 at 8:23 PM, Stephen Boyd wrote:
> On 02/13/15 12:20, Simon Horman wrote:
>> Hi Stephen,
>>
>> On Fri, Feb 13, 2015 at 10:06:39AM -0800, Stephen Boyd wrote:
>>> diff --git a/arch/arm/mach-shmobile/smp-r8a7779.c
>>> b/arch/arm/mach-shmobile/smp-r8a7779.c
>>> index
On 02/13/15 12:20, Simon Horman wrote:
> Hi Stephen,
>
> On Fri, Feb 13, 2015 at 10:06:39AM -0800, Stephen Boyd wrote:
>> diff --git a/arch/arm/mach-shmobile/smp-r8a7779.c
>> b/arch/arm/mach-shmobile/smp-r8a7779.c
>> index 3f761f839043..b45206f93ddf 100644
>> ---
Hi Stephen,
On Fri, Feb 13, 2015 at 10:06:39AM -0800, Stephen Boyd wrote:
> Writes to /sys/.../cpuX/online fail if we determine the platform
> doesn't support hotplug for that CPU. Furthermore, if the cpu_die
> op isn't specified the system hangs when we try to offline a CPU
> and it comes right
Writes to /sys/.../cpuX/online fail if we determine the platform
doesn't support hotplug for that CPU. Furthermore, if the cpu_die
op isn't specified the system hangs when we try to offline a CPU
and it comes right back online unexpectedly. Let's figure this
stuff out before we make the sysfs
Writes to /sys/.../cpuX/online fail if we determine the platform
doesn't support hotplug for that CPU. Furthermore, if the cpu_die
op isn't specified the system hangs when we try to offline a CPU
and it comes right back online unexpectedly. Let's figure this
stuff out before we make the sysfs
On 02/13/15 12:20, Simon Horman wrote:
Hi Stephen,
On Fri, Feb 13, 2015 at 10:06:39AM -0800, Stephen Boyd wrote:
diff --git a/arch/arm/mach-shmobile/smp-r8a7779.c
b/arch/arm/mach-shmobile/smp-r8a7779.c
index 3f761f839043..b45206f93ddf 100644
--- a/arch/arm/mach-shmobile/smp-r8a7779.c
+++
On Fri, Feb 13, 2015 at 08:54:22PM +, Magnus Damm wrote:
Thanks for your efforts. Can you please tell me where that limitation
is located? I'm quite sure I've brought CPU cores up and down
including CPU0, but maybe something is missing?
If you don't provide a cpu_disable function, by
Hi Stephen,
On Fri, Feb 13, 2015 at 10:06:39AM -0800, Stephen Boyd wrote:
Writes to /sys/.../cpuX/online fail if we determine the platform
doesn't support hotplug for that CPU. Furthermore, if the cpu_die
op isn't specified the system hangs when we try to offline a CPU
and it comes right back
On Fri, Feb 13, 2015 at 03:20:04PM -0500, Simon Horman wrote:
-static int r8a7779_cpu_disable(unsigned int cpu)
-{
- /* only CPU1-3 have power domains, do not allow hotplug of CPU0 */
- return cpu == 0 ? -EPERM : 0;
-}
...
Its not clear to me why r8a7779_cpu_disable() has been
On Fri, Feb 13, 2015 at 10:57:04PM +, Russell King - ARM Linux wrote:
On Fri, Feb 13, 2015 at 03:20:04PM -0500, Simon Horman wrote:
-static int r8a7779_cpu_disable(unsigned int cpu)
-{
- /* only CPU1-3 have power domains, do not allow hotplug of CPU0 */
- return cpu == 0 ? -EPERM
On Fri, Feb 13, 2015 at 09:44:50PM +, Magnus Damm wrote:
Also, based on the comment in mcpm_cpu_can_disable() it looks like the
PSCI hook may be executed once only with your change in place?
Hopefully PSCI is OK not being invoked for every CPU shutdown.
This is why I've said (in the parent
On 02/13/15 12:54, Magnus Damm wrote:
Hi Stephen,
On Fri, Feb 13, 2015 at 8:23 PM, Stephen Boyd sb...@codeaurora.org wrote:
On 02/13/15 12:20, Simon Horman wrote:
Hi Stephen,
On Fri, Feb 13, 2015 at 10:06:39AM -0800, Stephen Boyd wrote:
diff --git a/arch/arm/mach-shmobile/smp-r8a7779.c
Hi Stephen,
On Fri, Feb 13, 2015 at 8:23 PM, Stephen Boyd sb...@codeaurora.org wrote:
On 02/13/15 12:20, Simon Horman wrote:
Hi Stephen,
On Fri, Feb 13, 2015 at 10:06:39AM -0800, Stephen Boyd wrote:
diff --git a/arch/arm/mach-shmobile/smp-r8a7779.c
b/arch/arm/mach-shmobile/smp-r8a7779.c
Hi Stephen,
On Fri, Feb 13, 2015 at 8:59 PM, Stephen Boyd sb...@codeaurora.org wrote:
On 02/13/15 12:54, Magnus Damm wrote:
Hi Stephen,
On Fri, Feb 13, 2015 at 8:23 PM, Stephen Boyd sb...@codeaurora.org wrote:
On 02/13/15 12:20, Simon Horman wrote:
Hi Stephen,
On Fri, Feb 13, 2015 at
On 02/13/15 15:01, Russell King - ARM Linux wrote:
On Fri, Feb 13, 2015 at 09:44:50PM +, Magnus Damm wrote:
Also, based on the comment in mcpm_cpu_can_disable() it looks like the
PSCI hook may be executed once only with your change in place?
Hopefully PSCI is OK not being invoked for every
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