Re: [PATCH 0/4] rcutorture: Several fixes to run selftest scripts on PPC

On Thu, May 19, 2016 at 11:42:20AM +0800, Boqun Feng wrote: > I spend some time to make tools/testing/selftest/rcutorture run on PPC, > here are some documention and fixes made while I was trying. > > The scripts are able to run and get results on PPC, however please > note there are some stalls

Re: [PATCH 3/4] rcutorture: Make -soundhw a x86 specific option

On Thu, May 19, 2016 at 11:42:23AM +0800, Boqun Feng wrote: > The option "-soundhw pcspk" gives me a error on PPC as follow: > > qemu-system-ppc64: ISA bus not available for pcspk > > , which means this option doesn't work on ppc by default. So simply make > this an x86-specific option via

[PATCH 4/4] rcutorture: Don't specify the cpu type of QEMU on PPC

Do not restrict the cpu type to POWER7 for QEMU as we have POWER8 now. Signed-off-by: Boqun Feng --- tools/testing/selftests/rcutorture/bin/functions.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/rcutorture/bin/functions.sh

[PATCH 3/4] rcutorture: Make -soundhw a x86 specific option

The option "-soundhw pcspk" gives me a error on PPC as follow: qemu-system-ppc64: ISA bus not available for pcspk , which means this option doesn't work on ppc by default. So simply make this an x86-specific option via identify_qemu_args(). Signed-off-by: Boqun Feng ---

[PATCH 2/4] rcutorture: Use vmlinux as the fallback kernel image

vmlinux is available for all the architectures, and suitable for running a KVM guest by QEMU, besides, we used to copy the vmlinux to $resdir anyway. Therefore it makes sense to use it as the fallback kernel image for rcutorture KVM tests. This patch makes identify_boot_image() return vmlinux if

[PATCH 1/4] rcutorture/doc: Add a new way to create initrd using dracut

Using dracut is another way to get an initramfs for kvm based rcu torture tests, which is more flexible than using the host's initramfs image, because modules and binaries may be added or removed via dracut command options. So add an example in the document, in case that there are some situations

[PATCH 0/4] rcutorture: Several fixes to run selftest scripts on PPC

I spend some time to make tools/testing/selftest/rcutorture run on PPC, here are some documention and fixes made while I was trying. The scripts are able to run and get results on PPC, however please note there are some stalls even build errors that could be found by the tests currently. As I'm

Re: usb: dwc2: regression on MyBook Live Duo / Canyonlands since 4.3.0-rc4

On 5/18/2016 12:15 PM, Christian Lamparter wrote: > On Tuesday, May 17, 2016 04:50:48 PM John Youn wrote: >> On 5/14/2016 6:11 AM, Christian Lamparter wrote: >>> On Thursday, May 12, 2016 11:40:28 AM John Youn wrote: On 5/12/2016 6:30 AM, Christian Lamparter wrote: > On Thursday, May 12,

Re: [RFC PATCH 2/3] arch/powerpc : optprobes for powerpc core

On Wed, 18 May 2016 02:09:37 +0530 Anju T wrote: > Instruction slot for detour buffer is allocated from > the reserved area. For the time being 64KB is reserved > in memory for this purpose. ppc_get_optinsn_slot() and > ppc_free_optinsn_slot() are geared towards the

Re: [RFC PATCH] cpufreq: powernv: Add fast_switch callback

On Wed, May 18, 2016 at 2:53 PM, Shilpasri G Bhat wrote: > Add fast_switch driver callback to support frequency update in > interrupt context while using schedutil governor. Changing frequency > in interrupt context will remove the jitter on the workloads which can

Re: [kernel-hardening] [PATCH v8 2/4] GCC plugin infrastructure

On 18/05/16 20:33, Emese Revfy wrote: Did you test the plugins with all gcc versions (4.5-6)? No, I tested with 4.8 and 5.2 as those are the toolchains I have on hand - I'll try to test with the rest of 4.5 - 6.1. -- Andrew Donnellan OzLabs, ADL Canberra

Re: [RFC PATCH] Increase in idle power with schedutil

On Wed, May 18, 2016 at 2:53 PM, Shilpasri G Bhat wrote: > This patch adds driver callback for fast_switch and below observations > on schedutil governor are done with this patch. > > In POWER8 there is a regression observed with schedutil compared to > ondemand.

Re: usb: dwc2: regression on MyBook Live Duo / Canyonlands since 4.3.0-rc4

On Wednesday 18 May 2016 21:14:55 Christian Lamparter wrote: > On Tuesday, May 17, 2016 04:50:48 PM John Youn wrote: > > On 5/14/2016 6:11 AM, Christian Lamparter wrote: > Hey, that's really nice of you to do that :-D. Please keep me in the > loop (Cc) for those then. > > Yes, this needs

Re: livepatch: change to a per-task consistency model

On Wed, 18 May 2016, Josh Poimboeuf wrote: > Yeah, I think this situation -- a task sleeping on an affected function > in uninterruptible state for a long period of time -- would be > exceedingly rare and not something we need to worry about for now. Plus in case task'd be in

Re: usb: dwc2: regression on MyBook Live Duo / Canyonlands since 4.3.0-rc4

On Tuesday, May 17, 2016 04:50:48 PM John Youn wrote: > On 5/14/2016 6:11 AM, Christian Lamparter wrote: > > On Thursday, May 12, 2016 11:40:28 AM John Youn wrote: > >> On 5/12/2016 6:30 AM, Christian Lamparter wrote: > >>> On Thursday, May 12, 2016 01:55:44 PM Arnd Bergmann wrote: > On

Re: [PATCH] kvm-pr: manage illegal instructions

On 18.05.2016 12:53, Thomas Huth wrote: > On 18.05.2016 12:18, Thomas Huth wrote: >> On 17.05.2016 19:49, Laurent Vivier wrote: >>> >>> >>> On 17/05/2016 10:37, Alexander Graf wrote: On 05/17/2016 10:35 AM, Laurent Vivier wrote: > > On 12/05/2016 16:23, Laurent Vivier wrote: >>

Re: [PATCH v2 9/9] powerpc/powernv: Use deepest stop state when cpu is offlined

On Tue, May 03, 2016 at 01:54:38PM +0530, Shreyas B. Prabhu wrote: > If hardware supports stop state, use the deepest stop state when > > the cpu is offlined. > > Signed-off-by: Shreyas B. Prabhu Reviewed-by: Gautham R. Shenoy -- Thanks

Re: [PATCH v2 7/9] powerpc/powernv: Add platform support for stop instruction

Hi Shreyas, On Tue, May 03, 2016 at 01:54:36PM +0530, Shreyas B. Prabhu wrote: > POWER ISA v3 defines a new idle processor core mechanism. In summary, > a) new instruction named stop is added. This instruction replaces > instructions like nap, sleep, rvwinkle. > b) new per thread SPR

Re: livepatch: change to a per-task consistency model

On Wed, May 18, 2016 at 10:16:22AM +0200, Jiri Kosina wrote: > On Tue, 17 May 2016, Jessica Yu wrote: > > > What about tasks sleeping on affected functions in uninterruptible sleep > > (possibly indefinitely)? Since all signals are ignored, we wouldn't be > > able to patch those tasks in this

Re: [PATCH v6 3/7] QE: Add uqe_serial document to bindings

On Tue, May 17, 2016 at 10:38:59AM +0800, Zhao Qiang wrote: > Add uqe_serial document to > Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/uqe_serial.txt > > Signed-off-by: Zhao Qiang > --- > Changes for v2 > - modify tx/rx-clock-name specification > Changes for v3

Re: klp_task_patch: was: [RFC PATCH v2 17/18] livepatch: change to a per-task consistency model

On Mon 2016-05-16 13:12:50, Josh Poimboeuf wrote: > On Mon, May 09, 2016 at 02:23:03PM +0200, Petr Mladek wrote: > > On Fri 2016-05-06 07:38:55, Josh Poimboeuf wrote: > > > On Thu, May 05, 2016 at 01:57:01PM +0200, Petr Mladek wrote: > > > > I have missed that the two commands are called with

[RESEND v4,1/2] cxl: Add mechanism for delivering AFU driver

From: Ian Munsie This adds an afu_driver_ops structure with deliver_event callback. An AFU driver such as cxlflash can fill this out and associate it with a context to enable passing custom AFU specific events to userspace. This also adds a new kernel API function

[v3, 1/2] cxl: Add mechanism for delivering AFU driver specific events

From: Ian Munsie This adds an afu_driver_ops structure with deliver_event callback. An AFU driver such as cxlflash can fill this out and associate it with a context to enable passing custom AFU specific events to userspace. This also adds a new kernel API function

[v4,2/2] cxl: Add set and get private data to context struct

From: Michael Neuling This provides AFU drivers a means to associate private data with a cxl context. This is particularly intended for make the new callbacks for driver specific events easier for AFU drivers to use, as they can easily get back to any private data structures

[RFC PATCH] cpufreq: powernv: Add fast_switch callback

Add fast_switch driver callback to support frequency update in interrupt context while using schedutil governor. Changing frequency in interrupt context will remove the jitter on the workloads which can be seen when a kworker thread is used for the changing the frequency. Signed-off-by: Shilpasri

[RFC PATCH] Increase in idle power with schedutil

This patch adds driver callback for fast_switch and below observations on schedutil governor are done with this patch. In POWER8 there is a regression observed with schedutil compared to ondemand. With schedutil the frequency is not ramping down and is mostly stuck at max frequency during idle .

Re: [kernel-hardening] [PATCH v8 2/4] GCC plugin infrastructure

> I've done some basic sanity testing on powerpc with the cyclomatic > complexity plugin (with LE native + cross-compilers) and it seems to > work with the patch below. > > Signed-off-by: Andrew Donnellan > > diff --git a/arch/powerpc/Kconfig

Re: [PATCH] kvm-pr: manage illegal instructions

On 18.05.2016 12:18, Thomas Huth wrote: > On 17.05.2016 19:49, Laurent Vivier wrote: >> >> >> On 17/05/2016 10:37, Alexander Graf wrote: >>> On 05/17/2016 10:35 AM, Laurent Vivier wrote: On 12/05/2016 16:23, Laurent Vivier wrote: > > On 12/05/2016 11:27, Alexander Graf wrote:

Re: [PATCH] kvm-pr: manage illegal instructions

On 17.05.2016 19:49, Laurent Vivier wrote: > > > On 17/05/2016 10:37, Alexander Graf wrote: >> On 05/17/2016 10:35 AM, Laurent Vivier wrote: >>> >>> On 12/05/2016 16:23, Laurent Vivier wrote: On 12/05/2016 11:27, Alexander Graf wrote: > On 05/12/2016 11:10 AM, Laurent Vivier wrote:

Re: [kernel-hardening] [PATCH v8 2/4] GCC plugin infrastructure

On 13/05/16 09:57, Emese Revfy wrote: This patch allows to build the whole kernel with GCC plugins. It was ported from grsecurity/PaX. The infrastructure supports building out-of-tree modules and building in a separate directory. Cross-compilation is supported too. Currently the x86, arm, arm64

Re: livepatch: change to a per-task consistency model

On Tue, 17 May 2016, Jessica Yu wrote: > What about tasks sleeping on affected functions in uninterruptible sleep > (possibly indefinitely)? Since all signals are ignored, we wouldn't be > able to patch those tasks in this way, right? Would that be an > unsupported case? I don't think there

Re: [PATCH v2 1/9] powerpc/powernv: Move CHECK_HMI_INTERRUPT to exception-64s header

On 05/18/2016 10:05 AM, Gautham R Shenoy wrote: > On Tue, May 03, 2016 at 01:54:30PM +0530, Shreyas B. Prabhu wrote: >> 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. >> >

Re: [PATCH v2 2/9] powerpc/kvm: make hypervisor state restore a function

Hi Gautham, On 05/18/2016 11:55 AM, Gautham R Shenoy wrote: > Hi Shreyas, > > On Tue, May 03, 2016 at 01:54:31PM +0530, Shreyas B. Prabhu wrote: >> In the current code, when the thread wakes up in reset vector, some >> of the state restore code and check for whether a thread needs to >> branch

Re: [PATCH v2 4/9] powerpc/powernv: Make power7_powersave_common more generic

On 05/18/2016 12:07 PM, Gautham R Shenoy wrote: > Hi Shreyas, > > On Tue, May 03, 2016 at 01:54:33PM +0530, Shreyas B. Prabhu wrote: >> power7_powersave_common does common steps needed before entering idle >> state and eventually changes MSR to MSR_IDLE and does rfid to >>

Re: [PATCH v2 6/9] powerpc/powernv: set power_save func after the idle states are initialized

On Tue, May 03, 2016 at 01:54:35PM +0530, Shreyas B. Prabhu wrote: > 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

Re: [PATCH v2 4/9] powerpc/powernv: Make power7_powersave_common more generic

Hi Shreyas, On Tue, May 03, 2016 at 01:54:33PM +0530, Shreyas B. Prabhu wrote: > 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

Re: [PATCH v2 3/9] powerpc/powernv: Move idle code usable by multiple hardware to common location

Hi Shreyas, On Tue, May 03, 2016 at 01:54:32PM +0530, Shreyas B. Prabhu wrote: > 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. [..snip..] > diff --git

Re: [PATCH v2 2/9] powerpc/kvm: make hypervisor state restore a function

Hi Shreyas, On Tue, May 03, 2016 at 01:54:31PM +0530, Shreyas B. Prabhu wrote: > In the current code, when the thread wakes up in reset vector, some > of the state restore code and check for whether a thread needs to > branch to kvm is duplicated. Reorder the code such that this > duplication is