Benjamin Herrenschmidt writes:
> On Tue, 2017-06-13 at 20:04 +1000, Michael Ellerman wrote:
>> > Good idea. Writing to CTRL register can change only the RUN field.
>> > Was this any different in older generations?
>>
>> No AFAICS back to 2.02.
>>
>> > Anton and Ben kept the mfspr/mtspr part in
On Tue, 2017-06-13 at 20:04 +1000, Michael Ellerman wrote:
> > Good idea. Writing to CTRL register can change only the RUN field.
> > Was this any different in older generations?
>
> No AFAICS back to 2.02.
>
> > Anton and Ben kept the mfspr/mtspr part in earlier updates to this
> > routine.
>
On Tue, 13 Jun 2017 20:04:27 +1000
Michael Ellerman wrote:
> Vaidyanathan Srinivasan writes:
> > * Nicholas Piggin [2017-06-12 09:58:34]:
> >
> >> The CTRL register is read-only except bit 63 which is the run latch
> >> control. This means it can be updated with a mtspr rather than
> >> mfspr
Vaidyanathan Srinivasan writes:
> * Nicholas Piggin [2017-06-12 09:58:34]:
>
>> The CTRL register is read-only except bit 63 which is the run latch
>> control. This means it can be updated with a mtspr rather than
>> mfspr/mtspr.
>>
>> Signed-off-by: Nicholas Piggin
>
>> diff --git a/arch/power
* Nicholas Piggin [2017-06-12 09:58:34]:
> The CTRL register is read-only except bit 63 which is the run latch
> control. This means it can be updated with a mtspr rather than
> mfspr/mtspr.
>
> Signed-off-by: Nicholas Piggin
Reviewed-by: Vaidyanathan Srinivasan
> ---
> arch/powerpc/kernel/
The CTRL register is read-only except bit 63 which is the run latch
control. This means it can be updated with a mtspr rather than
mfspr/mtspr.
Signed-off-by: Nicholas Piggin
---
arch/powerpc/kernel/process.c | 12 ++--
1 file changed, 2 insertions(+), 10 deletions(-)
diff --git a/arch/
The CTRL register is read-only except bit 63 which is the run latch
control. This means it can be updated with a mtspr rather than
mfspr/mtspr.
Signed-off-by: Nicholas Piggin
---
arch/powerpc/kernel/process.c | 12 ++--
1 file changed, 2 insertions(+), 10 deletions(-)
diff --git a/arch/
