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
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
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
>>
>> 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
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
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
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
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
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
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
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
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
into issues if after we check if the destination
cpu is a sibling cpu, the task gets migrated from a sibling cpu to a
cpu on another core.
Fix this by using get_cpu()/ put_cpu()
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/sysdev/xics/icp-native.c | 14 +-
1 file changed, 9
On Wednesday 20 May 2015 10:43 PM, Jack Miller wrote:
> pnv_alloc_idle_core_states is iterating over PACAs based on the
> configured maximum number of CPUs (NR_CPUS), but PACAs are only
> initialized up to nr_cpu_ids, so rein in loops to keep from overwriting
> adjacent memory.
>
Hi Jack,
Jan
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
renschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-dev@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
Enter winkle during offline if supported, else revert to sleep or nap.
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/platforms/powernv/smp.c | 6 --
1 file changed, 4 insertions(+), 2
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
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 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
Cc: Grant Likely
Cc: devicet...@vger.kernel.org
Cc: linuxppc-dev@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:
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
chmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Rafael J. Wysocki
Cc: linux...@vger.kernel.org
Cc: linuxppc-dev@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-dev@lists.ozlabs.org
Suggested-by: "Srivatsa S. Bhat"
Signed-off-by: Shreyas B. Prabhu
[ Changelog added by ]
Signed-off-by: Preet
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
v@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
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
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-dev@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
s, recover slb
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-dev@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
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-dev@lists.ozlabs.org
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/platforms/powernv/smp.c | 6 --
1 file changed, 4 insertions(+), 2
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
>&
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.
>>
>>
: 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
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-dev@lists.ozlabs.org
---
arch/powerpc/include/asm/opal.h | 8 ++
ar
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
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-dev
Hi Preeti,
On Wednesday 12 November 2014 12:21 PM, Preeti U Murthy wrote:
> Hi Shreyas,
>
> On 11/03/2014 09:38 PM, Shreyas B. Prabhu wrote:
>> diff --git a/arch/powerpc/kernel/idle_power7.S
>> b/arch/powerpc/kernel/idle_power7.S
>> index 283c603..df11acb 100644
&
Srinivasan
Cc: Preeti U Murthy
Paul Mackerras (1):
powerpc: powernv: Switch off MMU before entering nap/sleep/rvwinkle
mode
Preeti U. Murthy (1):
powerpc/powernv: Enable Offline CPUs to enter deep idle states
Shreyas B. Prabhu (2):
powernv: cpuidle: Redesign idle states management
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-dev@lists.ozlabs.org
---
arch/powerpc/include/asm/opal.h | 8 ++
ar
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
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-dev
Hi Ben,
On Thursday 27 November 2014 06:07 AM, Benjamin Herrenschmidt wrote:
>
>>
>> @@ -37,8 +38,7 @@
>>
>> /*
>> * Pass requested state in r3:
>> - * 0 - nap
>> - * 1 - sleep
>> + * r3 - PNV_THREAD_NAP/SLEEP/WINKLE
>> *
>> * To check IRQ_HAPPENED in r4
>> * 0 - don't check
>> @
Hi Ben,
On Thursday 27 November 2014 07:25 AM, Benjamin Herrenschmidt wrote:
> On Tue, 2014-11-25 at 16:47 +0530, Shreyas B. Prabhu wrote:
>
>> diff --git a/arch/powerpc/kernel/cpu_setup_power.S
>> b/arch/powerpc/kernel/cpu_setup_power.S
>> index 4673353..66874aa 1006
On Friday 28 November 2014 05:20 AM, Paul Mackerras wrote:
> On Tue, Nov 25, 2014 at 04:47:58PM +0530, Shreyas B. Prabhu wrote:
> [snip]
>> +2:
>> +/* Sleep or winkle */
>> +li r7,1
>> +mfspr r8,SPRN_PIR
>> +/*
>> + * The last
Cc: Preeti U Murthy
Paul Mackerras (1):
powerpc: powernv: Switch off MMU before entering nap/sleep/rvwinkle
mode
Preeti U. Murthy (1):
powerpc/powernv: Enable Offline CPUs to enter deep idle states
Shreyas B. Prabhu (2):
powernv: cpuidle: Redesign idle states management
powernv
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-dev
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-dev@lists.ozlabs.org
---
arch/powerpc/include/asm/opal.h | 8 ++
ar
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 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
. 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-dev@lists.ozlabs.org
---
arch/powerpc/include/asm/opal.h | 8 ++
arch/powerpc
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-dev
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 Sunday 14 December 2014 03:35 PM, Michael Ellerman wrote:
> On Thu, 2014-04-12 at 07:28:21 UTC, "Shreyas B. Prabhu" wrote:
>> From: "Preeti U. Murthy"
>>
>> The secondary threads should enter deep idle states so as to gain maximum
>> powersaving
On Sunday 14 December 2014 03:35 PM, Michael Ellerman wrote:
> On Tue, 2014-09-12 at 18:56:53 UTC, "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 sta
On Monday 15 December 2014 05:31 AM, Michael Ellerman wrote:
> On Sun, 2014-12-14 at 17:22 +0530, Shreyas B Prabhu wrote:
>> On Sunday 14 December 2014 03:35 PM, Michael Ellerman wrote:
>>>> diff --git a/arch/powerpc/platforms/powernv/subcore.h
>>>> b/arch/po
> @@ -289,5 +289,4 @@ out_free:
> out:
> return 0;
> }
> -
> -subsys_initcall(pnv_init_idle_states);
> +machine_subsys_initcall(powernv, pnv_init_idle_states);
>
needs to be included, otherwise I get a build error.
With that,
Reviewed-by: Shreyas B Prabhu
_
while
entering the idle states.
Signed-off-by: Shreyas B. Prabhu
---
arch/powerpc/kernel/idle_power7.S | 14 ++
1 file changed, 14 insertions(+)
diff --git a/arch/powerpc/kernel/idle_power7.S
b/arch/powerpc/kernel/idle_power7.S
index ccde8f0..48c7d4f 100644
--- a/arch/powerpc/k
>
> What are the symptoms of this bug?
>
In the cases where we hit this race and the core enters fastsleep,
code mistakes an idle thread as running. Because of this, the first
thread waking up from fastsleep which is supposed to resync timebase
skips it. So we can end up having a core with sta
hread as running. Because of this, the first thread waking up from
fastsleep which is supposed to resync timebase skips it. So we can
end up having a core with stale timebase value.
This patch fixes the above race by looping on the lock bit even while
entering the idle states.
Signed-off-by: Shre
On 07/07/2015 05:52 AM, Michael Ellerman wrote:
> On Tue, 2015-07-07 at 01:39 +0530, Shreyas B. Prabhu wrote:
>> Signed-off-by: Shreyas B. Prabhu
>> Fixes: 7b54e9f213f76 'powernv/powerpc: Add winkle support for offline
>> cpus'
>
> The sha is wrong, it s
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
_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
___
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
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:
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:
chmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Rafael J. Wysocki
Cc: linux...@vger.kernel.org
Cc: linuxppc-dev@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-dev@lists.ozlabs.org
Suggested-by: "Srivatsa S. Bhat"
Signed-off-by: Shreyas B. Prabhu
[ Changelog added by ]
Signed-off-by: Preet
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
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
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-dev@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
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
Hi,
On Wednesday 07 January 2015 03:07 PM, Alexey Kardashevskiy wrote:
> Hi!
>
> "ppc64_cpu --smt=off" produces multiple error on the latest upstream kernel
> (sha1 bdec419):
>
> NMI watchdog: BUG: soft lockup - CPU#20 stuck for 23s! [swapper/20:0]
>
> or
>
> INFO: rcu_sched detected stalls
On Wednesday 07 January 2015 03:07 PM, Alexey Kardashevskiy wrote:
> Hi!
>
> "ppc64_cpu --smt=off" produces multiple error on the latest upstream kernel
> (sha1 bdec419):
>
> NMI watchdog: BUG: soft lockup - CPU#20 stuck for 23s! [swapper/20:0]
>
> or
>
> INFO: rcu_sched detected stalls on CP
: Shreyas B. Prabhu
Cc: Michael Ellerman
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: linuxppc-dev@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
to be used in both these places.
Signed-off-by: Shreyas B. Prabhu
Cc: Michael Ellerman
Cc: linuxppc-dev@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
: Shreyas B. Prabhu
Cc: Michael Ellerman
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: linuxppc-dev@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
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
>>
s can delay L2 fault detection.
This patch adds a new kernel paramerter
pnv_fastsleep_workaround_once, which can be used to override
the default behavior and apply the workaround once at boot and not undo
it.
Signed-off-by: Shreyas B. Prabhu
CC: Michael Ellerman
CC: Paul Mackerras
CC: Benjamin Herrens
in L2 directory will result
in a checkstop.
This patch adds a new kernel paramerter
pnv_fastsleep_workaround_once, which can be used to override
the default behavior and apply the workaround once at boot and not undo
it.
Signed-off-by: Shreyas B. Prabhu
CC: Michael Ellerman
CC: Paul Mac
On Tuesday 17 March 2015 03:09 PM, Benjamin Herrenschmidt wrote:
> On Tue, 2015-03-17 at 19:57 +1100, Michael Ellerman wrote:
>>
>> So my first preference is that you just bite the bullet and decide to either
>> always apply the workaround, or just stick with the current behaviour.
>> That's a
>
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
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
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