l to restore the SPRs on waking up from such a state.
>
> Fix the code in pnv_wakeup_tb_loss to restore the SPR states when cr4 is
> "eq" or "gt".
>
> Fixes: Commit bcef83a00dc4 ("powerpc/powernv: Add platform support for
> stop instruction&quo
On 08/25/2015 05:29 PM, Shreyas B Prabhu wrote:
>
>
> On 08/17/2015 01:22 PM, Shreyas B Prabhu wrote:
>>
>>
>> On 08/10/2015 05:58 PM, Thomas Renninger wrote:
>>> On Monday, August 03, 2015 11:46:00 AM Shreyas B. Prabhu wrote:
>>>> get_cpu_topolo
>>
>> Hi Rafael,
>>
>> If this patch looks good can you please pick this up?
>
> I picked it up last week, sorry for being silent about that.
>
> It should be in the Linus' tree already.
>
Thanks! Sorry I missed the fact that you had picked it last week.
Thanks,
Shreyas
--
To unsubscribe fro
On Monday 08 December 2014 11:22 AM, Paul Mackerras wrote:
> On Thu, Dec 04, 2014 at 12:58:23PM +0530, Shreyas B. Prabhu wrote:
>> Winkle is a deep idle state supported in power8 chips. A core enters
>> winkle when all the threads of the core enter winkle. In this state
>>
s to enter deep idle states
Shreyas B. Prabhu (2):
powernv: cpuidle: Redesign idle states management
powernv: powerpc: Add winkle support for offline cpus
arch/powerpc/include/asm/cpuidle.h | 14 ++
arch/powerpc/include/asm/opal.h| 13 +
arch/powerpc/inc
on relocation-on ISIs at 0xc...4400.
This fixes it by setting the MSR as required by the architecture before
setting the flag or executing the nap/sleep/rvwinkle instruction.
[ shre...@linux.vnet.ibm.com: Edited to handle LE ]
Signed-off-by: Paul Mackerras
Signed-off-by: Shreyas B. Prabhu
Cc: Benja
this info to perform tasks like
fastsleep workaround and timebase resync only once per core.
Signed-off-by: Shreyas B. Prabhu
Originally-by: Preeti U. Murthy
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Rafael J. Wysocki
Cc: linux...@vger.kernel.org
Cc: linuxppc
. Murthy
Signed-off-by: Shreyas B. Prabhu
Reviewed-by: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Rafael J. Wysocki
Cc: linux...@vger.kernel.org
Cc: linuxppc-...@lists.ozlabs.org
---
arch/powerpc/include/asm/opal.h | 8 ++
arch/powerpc
state. To manage this,
extend the infrastructure introduced for sleep. Mainly we add a paca
variable subcore_sibling_mask. Using this and the core_idle_state we can
distingush first thread in core and subcore.
Signed-off-by: Shreyas B. Prabhu
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael
Hi Paul,
On Monday 08 December 2014 10:31 AM, Paul Mackerras wrote:
> On Thu, Dec 04, 2014 at 12:58:22PM +0530, Shreyas B. Prabhu wrote:
>> Deep idle states like sleep and winkle are per core idle states. A core
>> enters these states only when all the threads enter either the
>
On Friday 23 January 2015 08:36 AM, Michael Ellerman wrote:
> On Mon, 2015-01-19 at 13:35 +0530, Shreyas B. Prabhu wrote:
>> PECE1 bit in LPCR is used to control whether decrementer can cause exit
>> from powersaving states. PECE1 bit is cleared before entering fastsleep
>>
: Shreyas B. Prabhu
Cc: Michael Ellerman
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: linuxppc-...@lists.ozlabs.org
---
This issue is separate from the issue which Alexey has reported. Fix for that is
still pending.
arch/powerpc/platforms/powernv/setup.c | 2 +-
1 file changed, 1 insertion
: Shreyas B. Prabhu
Cc: Michael Ellerman
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: linuxppc-...@lists.ozlabs.org
---
Changes is v2:
==
Using the helper function introduced in the previous patch.
arch/powerpc/platforms/powernv/setup.c | 2 +-
1 file changed, 1 insertion(+), 1
to be used in both these places.
Signed-off-by: Shreyas B. Prabhu
Cc: Michael Ellerman
Cc: linuxppc-...@lists.ozlabs.org
---
arch/powerpc/include/asm/reg.h | 4
arch/powerpc/platforms/powernv/smp.c | 4 ++--
drivers/cpuidle/cpuidle-powernv.c| 3 +--
3 files changed, 7 insertions
the cores and never undone. This can be triggered by
echo 1 > /sys/devices/system/cpu/fastsleep_workaround_state
For simplicity this attribute can be modified only once. Implying, once
fastsleep_workaround_state is changed to 1, it cannot be reverted to
the default state.
Signed-off-by: Shreya
d
on cores where the first thread is offline.
Fix this by setting first-online-cpu-of-the-core's bit in the mask.
This is done by fixing this in the underlying function
cpu_thread_mask_to_cores.
Signed-off-by: Shreyas B. Prabhu
---
This patch is new in v3
In an example scenario where all the
This is a cleanup patch; doesn't change any functionality. Moves
all cpuidle related code from setup.c to a new file.
Signed-off-by: Shreyas B. Prabhu
---
This patch is new in v3
arch/powerpc/platforms/powernv/Makefile | 2 +-
arch/powerpc/platforms/powernv/idle.c
Any suggestions on this?
On Thursday 16 April 2015 04:28 PM, Shreyas B. Prabhu wrote:
> kvm_no_guest function calls power7_wakeup_loss to put the thread into
> the deepest supported idle state. power7_wakeup_loss is defined in
> arch/powerpc/kernel/idle_power7.S, which is compiled
>>
>> By default, fastsleep_workaround_state = dynamic. In this case, workaround
>> is applied/undone everytime the core enters/exits fastsleep.
>>
>> fastsleep_workaround_state = applyonce. In this case the workaround is
>> applied once on all the cores and never undone. This can be triggered by
>
> A point that bothers me here is if we can potentially race with cpu
> hotplug ? If cpuX and its siblings are offline and it was interrupted to
> come online:
>
> cpuX cpuY
> Interrupted to come online
> Undo workaround
>
>
elogs
Changes in v3:
--
-Kernel parameter changed to sysfs attribute
Changes in v2:
--
-Changed commit message to accurately describe the downside
of running workaround always applied.
Shreyas B. Prabhu (3):
powerpc: Fix cpu_online_cores_map to return only online threads mask
p
This is a cleanup patch; doesn't change any functionality. Moves
all cpuidle related code from setup.c to a new file.
Signed-off-by: Shreyas B. Prabhu
Reviewed-by: Preeti U Murthy
---
arch/powerpc/platforms/powernv/Makefile | 2 +-
arch/powerpc/platforms/powernv/idle.c
ction
cpu_thread_mask_to_cores.
The result has the property that for all cores with online threads, there
is one bit set in the returned map. And further, all bits that are set in
the returned map correspond to online threads.
Signed-off-by: Shreyas B. Prabhu
Reviewed-by: Preeti U Murthy
[ Changelog from Mi
ate.
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/opal-api.h| 7 ++
arch/powerpc/include/asm/opal.h| 1 +
arch/powerpc/platforms/powernv/idle.c | 134 +
arch/powerpc/platforms/powernv/opal-wrappers.S | 1 +
4 fi
y: Shreyas B. Prabhu
---
arch/powerpc/kvm/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index 11850f3..b3b3d9f 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -75,7 +75,7 @@ config KVM
On Monday 30 March 2015 03:06 PM, Michael Ellerman wrote:
> On Sun, 2015-22-03 at 04:42:57 UTC, "Shreyas B. Prabhu" wrote:
>> Currently, cpu_online_cores_map returns a mask, which for every core
>> that has atleast one online thread, has the first-cpu-of-that-core's
On Monday 30 March 2015 03:51 PM, Michael Ellerman wrote:
> On Sun, 2015-22-03 at 04:42:59 UTC, "Shreyas B. Prabhu" wrote:
>> Fastsleep is one of the idle state which cpuidle subsystem currently
>> uses on power8 machines. In this state L2 cache is brought down
: Shreyas B. Prabhu
Reported-by: Aneesh Kumar K.V
---
include/trace/events/kmem.h | 6 --
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h
index 81ea598..dd9e612 100644
--- a/include/trace/events/kmem.h
+++ b/include/trace
03cb6c] .start_secondary+0x36c/0x3a0
[c01fed2e7f90] [c0008b6c] start_secondary_prolog+0x10/0x14
Fix this by converting mm_page_pcpu_drain trace point into TRACE_EVENT_CONDITION
where condition is cpu_online(smp_processor_id())
Signed-off-by: Shreyas B. Prabhu
---
include/trace/even
+0x10/0x14
Fix this by converting mm_page_free trace point into TRACE_EVENT_CONDITION
where condition is cpu_online(smp_processor_id())
Signed-off-by: Shreyas B. Prabhu
---
include/trace/events/kmem.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/trace/events/kmem.h
>> -DEFINE_EVENT_PRINT(mm_page, mm_page_pcpu_drain,
>> +TRACE_EVENT_CONDITION(mm_page_pcpu_drain,
>>
>> TP_PROTO(struct page *page, unsigned int order, int migratetype),
>>
>> TP_ARGS(page, order, migratetype),
>>
>> + TP_CONDITION(cpu_online(smp_processor_id())),
>> +
>> +
On Wednesday 29 April 2015 08:48 PM, Steven Rostedt wrote:
> On Wed, 29 Apr 2015 20:19:28 +0530
> Shreyas B Prabhu wrote:
>
>> IIUC there is no existing macro which can both add a condition and
>> override printk format, hence the fall back to TRACE_EVENT_CONDITION.
>
On Wednesday 29 April 2015 10:38 PM, Steven Rostedt wrote:
>> I am not sure if its worth the effort now. It doesn't look like any
>> other trace point apart from the above use case will benefit from it.
>> Only smbus_write and smbus_reply seem to come close. But even they need
>> separate TP_fast
On Thursday 30 April 2015 10:06 AM, Preeti Murthy wrote:
> On Wed, Apr 29, 2015 at 10:49 PM, Shreyas B Prabhu
> wrote:
>>
>>
>> On Wednesday 29 April 2015 10:38 PM, Steven Rostedt wrote:
>>>> I am not sure if its worth the effort now. It doesn't look l
ction
cpu_thread_mask_to_cores.
The result has the property that for all cores with online threads, there
is one bit set in the returned map. And further, all bits that are set in
the returned map correspond to online threads.
Signed-off-by: Shreyas B. Prabhu
Reviewed-by: Preeti U Murthy
[ Changelog from Mi
namic" vs "applyonce") as input.
-Improved changelogs
Changes in v3:
--
-Kernel parameter changed to sysfs attribute
Changes in v2:
--
-Changed commit message to accurately describe the downside
of running workaround always applied.
Shreyas B. Prabhu
ned-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/opal-api.h| 7 ++
arch/powerpc/include/asm/opal.h| 1 +
arch/powerpc/platforms/powernv/idle.c | 101 +
arch/powerpc/platforms/powernv/opal-wrappers.S | 1 +
4 files chan
This is a cleanup patch; doesn't change any functionality. Moves
all cpuidle related code from setup.c to a new file.
Signed-off-by: Shreyas B. Prabhu
Reviewed-by: Preeti U Murthy
---
arch/powerpc/platforms/powernv/Makefile | 2 +-
arch/powerpc/platforms/powernv/idle.c
ibute
Changes in v2:
--
-Changed commit message to accurately describe the downside
of running workaround always applied.
Shreyas B. Prabhu (3):
powerpc: Fix cpu_online_cores_map to return only online threads mask
powerpc/powernv: Move cpuidle related code from setup.c to new file
powerpc/powe
ction
cpu_thread_mask_to_cores.
The result has the property that for all cores with online threads, there
is one bit set in the returned map. And further, all bits that are set in
the returned map correspond to online threads.
Signed-off-by: Shreyas B. Prabhu
Reviewed-by: Preeti U Murthy
[ Changelog from Mi
ate.
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/opal-api.h| 7 ++
arch/powerpc/include/asm/opal.h| 1 +
arch/powerpc/platforms/powernv/idle.c | 132 +
arch/powerpc/platforms/powernv/opal-wrappers.S | 1 +
4 fi
This is a cleanup patch; doesn't change any functionality. Moves
all cpuidle related code from setup.c to a new file.
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/platforms/powernv/Makefile | 2 +-
arch/powerpc/platforms/powernv/idle.c | 191
On Wednesday 20 May 2015 06:30 AM, Michael Neuling wrote:
> On Wed, 2015-05-20 at 00:30 +0530, Shreyas B. Prabhu wrote:
>> Doorbell can be used to cause ipi on cpus which are sibling threads on
>> the same core. So icp_native_cause_ipi checks if the destination cpu
>> is a
4
4. Online the core
5. Start a guest (Topology 1 core 2 threads) on a subcore, in this case
on cpu 36
This works without any glitch.
Thanks,
Shreyas
On Monday 25 August 2014 11:31 PM, Shreyas B. Prabhu wrote:
> Fast sleep is an idle state, where the core and the L1 and L2
> caches are b
Hi,
Any updates on this patch series?
On Monday 25 August 2014 11:31 PM, Shreyas B. Prabhu wrote:
> Fast sleep is an idle state, where the core and the L1 and L2
> caches are brought down to a threshold voltage. This also means that
> the communication between L2 and L3 caches have to
Hi,
Any updates on this patch series?
On Thursday 18 September 2014 08:41 AM, Shreyas B Prabhu wrote:
> Hi,
>
> In this patch series we use winkle for offlined cores. I successfully
> tested the working of this with subcore functionality.
>
> Test scenario was as follows:
>
Hi Rafael,
On Tuesday 30 September 2014 04:58 AM, Rafael J. Wysocki wrote:
> On Monday, September 29, 2014 03:53:06 PM Shreyas B Prabhu wrote:
>> Hi,
>> Any updates on this patch series?
>
> I have a couple of patches from there in my tree it seems. Please have a look
&g
unconditionally.
Reported-by: Geert Uytterhoeven
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/platforms/powernv/setup.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/powernv/setup.c
b/arch/powerpc/platforms/powernv/setup.c
index 8723d32..e6bde98 100644
--- a
Reviewed-by: Srivatsa S. Bhat
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/platforms/powernv/setup.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/powernv/setup.c
b/arch/powerpc/platforms/powernv/setup.c
index 8c16a5f..678573c 100644
--- a/arch/powerpc/platforms
: lvalue required as left
operand of assignment
'setup_max_cpus' variable is relevant only on SMP, so there is no point
working around it for UP. Furthermore, subcore.c itself is relevant only
on SMP and hence the better solution is to exclude subcore.c for UP builds.
Signed-off-by: Shreyas
Reviewed-by: Srivatsa S. Bhat
Signed-off-by: Shreyas B. Prabhu
---
Changes is v2:
Commit message improved based on suggestion.
arch/powerpc/platforms/powernv/setup.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/powernv/setup.c
b/arch/powerpc/platforms/powernv
ned-off-by: Shreyas B. Prabhu
---
Changes in v2:
Excluding subcore-asm.o which is part of the subcore feature for UP configs.
arch/powerpc/platforms/powernv/Makefile | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/Makefile
b/arch/powerpc
uidle: Add workaround to enable fastsleep
Shreyas B. Prabhu (6):
powerpc/kvm/book3s_hv: Enable CPUs to run guest after waking up from
fast-sleep
powerpc/powernv: Add OPAL call to save and restore
powerpc: Adding macro for accessing Thread Switch Control Register
powerpc/powernv:
rman
Cc: Rafael J. Wysocki
Signed-off-by: Shreyas B. Prabhu
Signed-off-by: Preeti U Murthy
---
arch/powerpc/include/asm/machdep.h | 3 +
arch/powerpc/include/asm/opal.h| 3 +
arch/powerpc/include/asm/processor.h | 4 +-
arch/power
chmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Rafael J. Wysocki
Cc: linux...@vger.kernel.org
Cc: linuxppc-...@lists.ozlabs.org
Signed-off-by: Srivatsa S. Bhat
Signed-off-by: Shreyas B. Prabhu
[ Changelog modified by pre...@linux.vnet.ibm.com ]
Signed-off-by: Preeti U. Murthy
---
arch/power
check in the wakeup from any of the deep idle states path as well.
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-...@lists.ozlabs.org
Suggested-by: "Srivatsa S. Bhat"
Signed-off-by: Shreyas B. Prabhu
[ Changelog added by ]
Signed-off-by: Preet
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/opal.h | 1 +
arch/powerpc/platforms/powernv/powernv.h | 1 +
arch/powerpc/platforms/powernv/setup.c | 75
arch/powerpc/platforms/powernv/subcore.c | 15 +++
4 files changed, 92
Enter winkle during offline if supported, else revert to sleep or nap.
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-...@lists.ozlabs.org
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/platforms/powernv/smp.c | 6 --
1 file changed, 4 insertions(+), 2
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-...@lists.ozlabs.org
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/reg.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index
Mackerras
Cc: Michael Ellerman
Suggested-by: Vaidyanathan Srinivasan
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/opal.h| 2 ++
arch/powerpc/platforms/powernv/opal-wrappers.S | 1 +
2 files changed, 3 insertions(+)
diff --git a/arch/powerpc/include/asm/opal.h b/arch
renschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-...@lists.ozlabs.org
Suggested-by: Vaidyanathan Srinivasan
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/machdep.h | 1 +
arch/powerpc/include/asm/paca.h| 3 ++
arch/powerpc/include/asm/ppc-opco
uidle: Add workaround to enable fastsleep
Shreyas B. Prabhu (6):
powerpc/kvm/book3s_hv: Enable CPUs to run guest after waking up from
fast-sleep
powerpc/powernv: Add OPAL call to save and restore
powerpc: Adding macro for accessing Thread Switch Control Register
powerpc/powernv:
Cc: Grant Likely
Cc: devicet...@vger.kernel.org
Signed-off-by: Preeti U. Murthy
Signed-off-by: Shreyas B. Prabhu
---
drivers/cpuidle/cpuidle-powernv.c | 27 ++-
1 file changed, 22 insertions(+), 5 deletions(-)
diff --git a/drivers/cpuidle/cpuidle-powernv.c
b/drivers
On Tuesday 07 October 2014 11:03 AM, Benjamin Herrenschmidt wrote:
> On Wed, 2014-10-01 at 13:16 +0530, Shreyas B. Prabhu wrote:
>> Winkle causes power to be gated off to the entire chiplet. Hence the
>> hypervisor/firmware state in the entire chiplet is lost.
>>
>>
v1:
https://lkml.org/lkml/2014/8/25/446
Preeti U Murthy (1):
powerpc/powernv/cpuidle: Add workaround to enable fastsleep
Shreyas B. Prabhu (1):
powerpc/kvm/book3s_hv: Enable CPUs to run guest after waking up from
fast-sleep
Srivatsa S. Bhat (1):
powerpc/powernv: Enable Offline CPUs to enter
Cc: Grant Likely
Cc: devicet...@vger.kernel.org
Cc: linuxppc-...@lists.ozlabs.org
Cc: Michael Ellerman
Signed-off-by: Preeti U. Murthy
Signed-off-by: Shreyas B. Prabhu
---
v2:
Rebased on 3.17-rc7
Separated from 'powerpc/powernv: Support for fastsleep and winkle'
v1:
Initial post
https:
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-...@lists.ozlabs.org
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/reg.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index
rman
Cc: Rafael J. Wysocki
Signed-off-by: Shreyas B. Prabhu
Signed-off-by: Preeti U Murthy
---
arch/powerpc/include/asm/machdep.h | 3 +
arch/powerpc/include/asm/opal.h| 3 +
arch/powerpc/include/asm/processor.h | 4 +-
arch/power
chmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Rafael J. Wysocki
Cc: linux...@vger.kernel.org
Cc: linuxppc-...@lists.ozlabs.org
Signed-off-by: Srivatsa S. Bhat
Signed-off-by: Shreyas B. Prabhu
[ Changelog modified by pre...@linux.vnet.ibm.com ]
Signed-off-by: Preeti U. Murthy
---
arch/power
.@lists.ozlabs.org
v2:
Rebased on 3.17-rc7
Split from 'powerpc/powernv: Support for fastsleep and winkle'
v1:
https://lkml.org/lkml/2014/8/25/446
Shreyas B. Prabhu (5):
powerpc/powernv: Add OPAL call to save and restore
powerpc: Adding macro for accessing Thread Switch Control
check in the wakeup from any of the deep idle states path as well.
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-...@lists.ozlabs.org
Suggested-by: "Srivatsa S. Bhat"
Signed-off-by: Shreyas B. Prabhu
[ Changelog added by ]
Signed-off-by: Preet
s, recover slb
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-...@lists.ozlabs.org
Suggested-by: Vaidyanathan Srinivasan
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/machdep.h | 1 +
arch/powerpc/include/asm/paca.h| 3 ++
ar
Enter winkle during offline if supported, else revert to sleep or nap.
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-...@lists.ozlabs.org
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/platforms/powernv/smp.c | 6 --
1 file changed, 4 insertions(+), 2
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/opal.h | 1 +
arch/powerpc/platforms/powernv/powernv.h | 1 +
arch/powerpc/platforms/powernv/setup.c | 75
arch/powerpc/platforms/powernv/subcore.c | 15 +++
4 files changed, 92
Mackerras
Cc: Michael Ellerman
Suggested-by: Vaidyanathan Srinivasan
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/opal.h| 2 ++
arch/powerpc/platforms/powernv/opal-wrappers.S | 1 +
2 files changed, 3 insertions(+)
diff --git a/arch/powerpc/include/asm/opal.h b/arch
CCing Rafael J. Wysocki and linux...@vger.kernel.org
On Wednesday 01 October 2014 01:15 PM, Shreyas B. Prabhu wrote:
> When guests have to be launched, the secondary threads which are offline
> are woken up to run the guests. Today these threads wake up from nap
> and check if they ha
On Thursday 02 October 2014 02:16 AM, Rafael J. Wysocki wrote:
> On Wednesday, October 01, 2014 01:15:57 PM Shreyas B. Prabhu wrote:
>> Fast sleep is an idle state, where the core and the L1 and L2
>> caches are brought down to a threshold voltage. This also means that
>&
: Enable Offline CPUs to enter deep idle states
Shreyas B. Prabhu (2):
powernv: cpuidle: Redesign idle states management
powernv: powerpc: Add winkle support for offline cpus
arch/powerpc/include/asm/cpuidle.h | 14 ++
arch/powerpc/include/asm/opal.h| 13 +
arch
this info to perform tasks like
fastsleep workaround and timebase resync only once per core.
Signed-off-by: Shreyas B. Prabhu
Originally-by: Preeti U. Murthy
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Rafael J. Wysocki
Cc: linux...@vger.kernel.org
Cc: linuxppc
state. To manage this,
extend the infrastructure introduced for sleep. Mainly we add a paca
variable subcore_sibling_mask. Using this and the core_idle_state we can
distingush first thread in core and subcore.
Signed-off-by: Shreyas B. Prabhu
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael
on relocation-on ISIs at 0xc...4400.
This fixes it by setting the MSR as required by the architecture before
setting the flag or executing the nap/sleep/rvwinkle instruction.
[ shre...@linux.vnet.ibm.com: Edited to handle LE ]
Signed-off-by: Paul Mackerras
Signed-off-by: Shreyas B. Prabhu
Cc: Benja
Srivatsa S. Bhat
Signed-off-by: Preeti U. Murthy
Signed-off-by: Shreyas B. Prabhu
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Rafael J. Wysocki
Cc: linux...@vger.kernel.org
Cc: linuxppc-...@lists.ozlabs.org
---
arch/powerpc/include/asm/opal.h | 8 ++
ar
On 07/09/2015 10:11 AM, Daniel Axtens wrote:
>> I recommend creating an alias or script that does:
>>
>> $ git log --pretty=fixes -n 1 $commit | xclip
>>
>
> FWIW, having finally got around to doing this, I found I first needed
> the following snippet in ~/.gitconfig from
> https://www.kernel.or
On 08/17/2015 01:22 PM, Shreyas B Prabhu wrote:
>
>
> On 08/10/2015 05:58 PM, Thomas Renninger wrote:
>> On Monday, August 03, 2015 11:46:00 AM Shreyas B. Prabhu wrote:
>>> get_cpu_topology() tries to get topology info from all cpus by reading
>>> files in th
On 08/10/2015 05:58 PM, Thomas Renninger wrote:
> On Monday, August 03, 2015 11:46:00 AM Shreyas B. Prabhu wrote:
>> get_cpu_topology() tries to get topology info from all cpus by reading
>> files in the topology sysfs dir. If a cpu is offlined, since it doesn't
>&g
_power8_hid0() which follows this
> recipe and invoke it from the static split core path.
>
> Signed-off-by: Gautham R. Shenoy
Reviewed-by: Shreyas B. Prabhu
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On 05/03/2016 10:55 AM, Michael Neuling wrote:
>
>> diff --git a/arch/powerpc/include/asm/cputable.h
>> b/arch/powerpc/include/asm/cputable.h
>> index df4fb5f..a4739a1 100644
>> --- a/arch/powerpc/include/asm/cputable.h
>> +++ b/arch/powerpc/include/asm/cputable.h
>> @@ -205,6 +205,7 @@ enum {
: Daniel Lezcano
Cc: linux...@vger.kernel.org
Cc: Michael Ellerman
Cc: Paul Mackerras
Cc: linuxppc-...@lists.ozlabs.org
Signed-off-by: Shreyas B. Prabhu
---
drivers/cpuidle/cpuidle-powernv.c | 57 ++-
1 file changed, 56 insertions(+), 1 deletion(-)
diff --git a
CHECK_HMI_INTERRUPT is used to check for HMI's in reset vector. Move
the macro to a common location (exception-64s.h)
This patch does not change any functionality.
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/exception-64s.h | 18 ++
arch/powerpc/k
. Wysocki
Cc: Daniel Lezcano
Cc: linux...@vger.kernel.org
Cc: Michael Ellerman
Cc: Paul Mackerras
Cc: Michael Neuling
Cc: linuxppc-...@lists.ozlabs.org
Shreyas B. Prabhu (9):
powerpc/powernv: Move CHECK_HMI_INTERRUPT to exception-64s header
powerpc/kvm: make hypervisor state restore a
pnv_init_idle_states discovers supported idle states from the
device tree and does the required initialization. Set power_save
function pointer only after this initialization is done
Signed-off-by: Shreyas B. Prabhy
---
arch/powerpc/platforms/powernv/idle.c | 3 +++
arch/powerpc/platforms/power
for stop instruction and PSSCR handling.
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/include/asm/cpuidle.h| 2 +
arch/powerpc/include/asm/kvm_book3s_asm.h | 2 +-
arch/powerpc/include/asm/machdep.h| 1 +
arch/powerpc/include/asm/opal-api.h | 11 +-
arch/powerpc
If hardware supports stop state, use the deepest stop state when
the cpu is offlined.
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/platforms/powernv/idle.c| 15 +--
arch/powerpc/platforms/powernv/powernv.h | 1 +
arch/powerpc/platforms/powernv/smp.c | 4 +++-
3 files
Move idle related macros to a common location asm/cpuidle.h so that
they can be used for stop instruction support.
Signed-off-by: Shreyas B. Prabhy
---
arch/powerpc/include/asm/cpuidle.h | 27 +++
arch/powerpc/kernel/idle_power7.S | 26 --
2 files
kvm)
goto kvm_start_guest
goto power7_wakeup_loss
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/kernel/exceptions-64s.S | 29 +++-
arch/powerpc/kernel/idle_power7.S| 67
2 files changed, 41 insertions(+), 55
power7_powersave_common does common steps needed before entering idle
state and eventually changes MSR to MSR_IDLE and does rfid to
power7_enter_nap_mode.
Make it more generic by passing the rfid address as a function parameter.
Also make function name more generic.
Signed-off-by: Shreyas B
CPU-idle related code like context save/restore functions idle_power7.S
can reused for adding stop instruction support. Move this
code to a new commonly accessible location.
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/kernel/Makefile| 1 +
arch/powerpc/kernel/idle_power7.S
idle_power7.S handles idle entry/exit for POWER7, POWER8 and in next
patch for POWER9. Rename the file to a non-hardware specific
name.
Signed-off-by: Shreyas B. Prabhu
---
Changes in v3:
==
- Instead of moving few common functions from idle_power7.S to
idle_power_common.S
: linux...@vger.kernel.org
Cc: Michael Ellerman
Cc: Paul Mackerras
Cc: Michael Neuling
Cc: linuxppc-...@lists.ozlabs.org
Shreyas B. Prabhu (9):
powerpc/powernv: Move CHECK_HMI_INTERRUPT to exception-64s header
powerpc/kvm: make hypervisor state restore a function
powerpc/powernv: Rename
Create a function for saving SPRs before entering deep idle states.
This function can be reused for POWER9 deep idle states.
Signed-off-by: Shreyas B. Prabhu
---
New in v3
arch/powerpc/kernel/idle_power_common.S | 54 +++--
1 file changed, 32 insertions(+), 22
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