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

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 named PSSCR is

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

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 avoided.

Re: [RFC PATCH v2 05/18] sched: add task flag for preempt IRQ tracking

On Thu, May 19, 2016 at 4:15 PM, Josh Poimboeuf wrote: > On Mon, May 02, 2016 at 08:52:41AM -0700, Andy Lutomirski wrote: >> On Mon, May 2, 2016 at 6:52 AM, Josh Poimboeuf wrote: >> > On Fri, Apr 29, 2016 at 05:08:50PM -0700, Andy Lutomirski wrote: >> >>

[PATCH] ps3_gelic: use kmemdup

Use kmemdup when some other buffer is immediately copied into allocated region. It replaces call to allocation followed by memcpy, by a single call to kmemdup. Signed-off-by: Muhammad Falak R Wani --- drivers/net/ethernet/toshiba/ps3_gelic_wireless.c | 4 ++-- 1 file

Re: [RFC PATCH v2 05/18] sched: add task flag for preempt IRQ tracking

On Mon, May 02, 2016 at 08:52:41AM -0700, Andy Lutomirski wrote: > On Mon, May 2, 2016 at 6:52 AM, Josh Poimboeuf wrote: > > On Fri, Apr 29, 2016 at 05:08:50PM -0700, Andy Lutomirski wrote: > >> On Apr 29, 2016 3:41 PM, "Josh Poimboeuf" wrote: > >> > >

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

On Thu, May 19, 2016 at 12:38:47PM -0700, Paul E. McKenney wrote: > On Thu, May 19, 2016 at 09:23:39AM -0700, Paul E. McKenney wrote: > > On Thu, May 19, 2016 at 08:40:42AM -0700, Josh Triplett wrote: > > > On Thu, May 19, 2016 at 07:10:13AM -0700, Paul E. McKenney wrote: > > > > On Wed, May 18,

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

On Thu, May 19, 2016 at 09:23:39AM -0700, Paul E. McKenney wrote: > On Thu, May 19, 2016 at 08:40:42AM -0700, Josh Triplett wrote: > > On Thu, May 19, 2016 at 07:10:13AM -0700, Paul E. McKenney wrote: > > > On Wed, May 18, 2016 at 09:23:10PM -0700, Josh Triplett wrote: > > > > On Thu, May 19, 2016

[PATCH] powerpc: Improve comment explaining why we modify VRSAVE

The comment explaining why we modify VRSAVE is misleading, glibc does rely on the behaviour. Update the comment. Signed-off-by: Anton Blanchard --- diff --git a/arch/powerpc/kernel/vector.S b/arch/powerpc/kernel/vector.S index 1c2e7a3..3907fcf 100644 ---

[RFC PATCH 2/2] powerpc/mm: Support segment table for Power9

PowerISA 3.0 adds an in memory table for storing segment translation information. In this mode, which is enabled by setting both HOST RADIX and GUEST RADIX bits in partition table to 0 and enabling UPRT to 1, we have a per process segment table. The segment table details are stored in the process

[RFC PATCH 1/2] powerpc/mm: Switch user slb fault handling to translation enabled

We also handle fault with proper stack initialized. This enable us to callout to C in fault handling routines. We don't do this for kernel mapping, because of the possibility of taking recursive fault if kernel stack in not yet mapped by an slb entry. This enable us to handle Power9 slb fault

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

On Thu, May 19, 2016 at 08:40:42AM -0700, Josh Triplett wrote: > On Thu, May 19, 2016 at 07:10:13AM -0700, Paul E. McKenney wrote: > > On Wed, May 18, 2016 at 09:23:10PM -0700, Josh Triplett wrote: > > > On Thu, May 19, 2016 at 11:42:23AM +0800, Boqun Feng wrote: > > > > The option "-soundhw

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

On Thu, May 19, 2016 at 07:10:13AM -0700, Paul E. McKenney wrote: > On Wed, May 18, 2016 at 09:23:10PM -0700, Josh Triplett wrote: > > 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:

[PATCH v3 4/8] powerpc: add io{read,write}64 accessors

This will allow device drivers to consistently use io{read,write}XX also for 64-bit accesses. Acked-by: Michael Ellerman Signed-off-by: Horia Geantă --- arch/powerpc/kernel/iomap.c | 24 1 file changed, 24 insertions(+) diff

[RFC PATCH v2 3/3] arch/powerpc : Enable optprobes support in powerpc

Signed-off-by: Anju T --- Documentation/features/debug/optprobes/arch-support.txt | 2 +- arch/powerpc/Kconfig| 1 + arch/powerpc/kernel/Makefile| 1 + 3 files changed, 3 insertions(+), 1 deletion(-) diff

[RFC PATCH v2 2/3] arch/powerpc : optprobes for powerpc core

ppc_get_optinsn_slot() and ppc_free_optinsn_slot() are geared towards the allocation and freeing of memory from the area reserved for detour buffer. Signed-off-by: Anju T --- arch/powerpc/kernel/optprobes.c | 480 1 file

[RFC PATCH v2 1/3] arch/powerpc : Add detour buffer support for optprobes

Detour buffer contains instructions to create an in memory pt_regs. After the execution of prehandler a call is made for instruction emulation. The NIP is decided after the probed instruction is executed. Hence a branch instruction is created to the NIP returned by emulate_step(). Instruction

[RFC PATCH v2 0/3] OPTPROBES for powerpc

Here are the RFC patchset of the kprobes jump optimization (a.k.a OPTPROBES)for powerpc. Kprobe being an inevitable tool for kernel developers,enhancing the performance of kprobe has got much importance. Currently kprobes inserts a trap instruction to probe a running kernel. Jump optimization

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

Hi Shreyas, On Wed, May 18, 2016 at 12:37:56PM +0530, Shreyas B Prabhu wrote: [..snip..] > >> diff --git a/arch/powerpc/kernel/exceptions-64s.S > >> b/arch/powerpc/kernel/exceptions-64s.S > >> index 7716ceb..7ebfbb0 100644 > >> --- a/arch/powerpc/kernel/exceptions-64s.S > >> +++

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

On Thu, May 19, 2016 at 1:40 PM, Peter Zijlstra wrote: > On Wed, May 18, 2016 at 11:11:51PM +0200, Rafael J. Wysocki wrote: >> On Wed, May 18, 2016 at 2:53 PM, Shilpasri G Bhat >> wrote: >> > This patch adds driver callback for fast_switch

Re: [PATCH v2 5/9] powerpc/powernv: Move idle related macros to cpuidle.h

On Tue, May 03, 2016 at 01:54:34PM +0530, Shreyas B. Prabhu wrote: > 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 Reviewed-by: Gautham R. Shenoy

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

On Wed, May 18, 2016 at 12:21:17PM +0530, Shreyas B Prabhu wrote: > With this patch, r5 which is the third parameter to > power_powersave_common contains the return address that needs to be > written to SRR0. So here I'm keeping r5 unaltered and using r7 for the MSR. Ok. Reviewed-by: Gautham R.

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

On Wed, May 18, 2016 at 09:25:17PM -0700, Josh Triplett wrote: > 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

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

On Wed, May 18, 2016 at 09:23:10PM -0700, Josh Triplett wrote: > 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

Re: next build: 37 warnings 2 failures (next/next-20160519)

On Thursday 19 May 2016 15:03:34 Kishon Vijay Abraham I wrote: > > > >> 1 drivers/phy/phy-exynos-mipi-video.c:238:13: warning: 'val' may be > >> used uninitialized in this function [-Wmaybe-uninitialized] > > > > I sent a patch on May 11, it was reviewed by Krzysztof Kozlowski, but not >

Re: next build: 37 warnings 2 failures (next/next-20160519)

On Thursday 19 May 2016 11:20:44 Michal Hocko wrote: > On Thu 19-05-16 11:07:09, Arnd Bergmann wrote: > [...] > > > 6 mm/page_alloc.c:3651:6: warning: 'compact_result' may be used > > > uninitialized in this function [-Wmaybe-uninitialized] > > > > I'm surprised this one is still there, I

Re: WARNING at kernel/sched/core.c:1166 while booting 4.6.0 mainline on ppc64le bare metal

On Thu, May 19, 2016 at 04:27:49PM +0530, abdhalee wrote: >Hi > >Today's mainline stable 4.6 on ppc64le bare metal booted with the following >warning. > >[0.080615] EEH: PowerNV platform initialized >[0.080709] POWER8 performance monitor hardware support registered >[0.080791]

Re: Pull request: scottwood/linux.git next

On Mon, 2016-05-16 at 20:37 -0500, Scott Wood wrote: > Sorry for the lateness... > > Contains include 86xx fixes, minor device tree fixes, an erratum > workaround, and a kconfig dependency fix. Thanks, merged into next and pushed. Will send a pull request to Linus late tomorrow once the whole

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

On Wed, May 18, 2016 at 11:11:51PM +0200, Rafael J. Wysocki wrote: > 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

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

On 19 May 2016 at 16:22, Michael Ellerman wrote: > On Wed, 2016-05-18 at 12:33 +0200, Emese Revfy wrote: > > Did you test the plugins with all gcc versions (4.5-6)? > > What's the concern about gcc versions? Just not breaking the build on old > compilers? the earlier plugin capable gcc versions

Re: next build: 37 warnings 2 failures (next/next-20160519)

On Thu, 19 May 2016, Arnd Bergmann wrote: > > 2 drivers/xen/balloon.c:154:13: warning: 'release_memory_resource' > > declared 'static' but never defined [-Wunused-function] > > I sent a patch on May 11, subject "xen: remove incorrect forward declaration" > and > Stefano Stabellini

Re: next build: 37 warnings 2 failures (next/next-20160519)

Hi Arnd, On Thursday 19 May 2016 02:37 PM, Arnd Bergmann wrote: > On Thursday 19 May 2016 00:45:16 Olof's autobuilder wrote: >> Errors: >> >> arm64.allmodconfig: >> samples/seccomp/bpf-fancy.c:13:27: fatal error: linux/seccomp.h: No such >> file or directory >>

Re: next build: 37 warnings 2 failures (next/next-20160519)

On Thu 19-05-16 11:07:09, Arnd Bergmann wrote: [...] > > 6 mm/page_alloc.c:3651:6: warning: 'compact_result' may be used > > uninitialized in this function [-Wmaybe-uninitialized] > > I'm surprised this one is still there, I sent a patch but Michal Hocko came > up with > a better fix on

Re: next build: 37 warnings 2 failures (next/next-20160519)

On Thursday 19 May 2016 00:45:16 Olof's autobuilder wrote: > Errors: > > arm64.allmodconfig: > samples/seccomp/bpf-fancy.c:13:27: fatal error: linux/seccomp.h: No such file > or directory > samples/seccomp/dropper.c:20:27: fatal error: linux/seccomp.h: No such file > or directory >

[PATCH 7/7] powerpc/mm: remove flush_tlb_page_nohash

This should be same as flush_tlb_page except for hash32. For hash32 I guess the existing code is wrong, because we don't seem to be flushing tlb for Hash != 0 case at all. Fix this by switching to calling flush_tlb_page() which does the right thing by flushing tlb for both hash and nohash case

[PATCH 1/7] powerpc/mm: Use hugetlb flush functions

Use flush_hugetlb_page instead of flush_tlb_page when we clear flush the pte. Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/include/asm/hugetlb.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/hugetlb.h

[PATCH 6/7] powerpc/mm/hugetlb: Add flush_hugetlb_tlb_range

Some archs like ppc64 need to do special things when flushing tlb for hugepage. Add a new helper to flush hugetlb tlb range. This helps us to avoid flushing the entire tlb mapping for the pid. Signed-off-by: Aneesh Kumar K.V ---

[PATCH 5/7] powerpc/mm/radix/hugetlb: Add helper for finding page size from hstate

Use the helper instead of open coding the same at multiple place Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/include/asm/book3s/64/hugetlb-radix.h | 15 +++ .../powerpc/include/asm/book3s/64/tlbflush-radix.h | 4 +--

[PATCH 4/7] powerpc/mm/radix: Rename function and drop unused arg

Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/include/asm/book3s/64/tlbflush-radix.h | 10 +- arch/powerpc/mm/hugetlbpage-radix.c | 4 ++-- arch/powerpc/mm/tlb-radix.c | 16 3 files changed, 15

[PATCH 3/7] powerpc/mm/radix: Add tlb flush of THP ptes

Instead of flushing the entire mm, implement a flush_pmd_tlb_range Signed-off-by: Aneesh Kumar K.V --- .../powerpc/include/asm/book3s/64/tlbflush-radix.h | 4 ++ arch/powerpc/include/asm/book3s/64/tlbflush.h | 9 arch/powerpc/mm/pgtable-book3s64.c

[PATCH 2/7] powerpc/mm: Drop multiple definition of mm_is_core_local

Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/include/asm/tlb.h | 13 + arch/powerpc/mm/tlb-radix.c| 6 -- arch/powerpc/mm/tlb_nohash.c | 6 -- 3 files changed, 13 insertions(+), 12 deletions(-) diff --git

[PATCH 0/7] TLB flush update for radix

Hi, This patch series introduce range based tlb flush and use the same for radix implementation. We still need to handle the mmu_gather related tlb flush. That will be done in a later patch. Aneesh Kumar K.V (7): powerpc/mm: Use hugetlb flush functions powerpc/mm: Drop multiple definition of

[PATCH 5/6] powerpc/mm: Make MMU_FTR_RADIX a MMU family feature

MMU feature bits are defined such that we use the lower half to present MMU family features. Remove the strict split of half and also move Radix to a mmu family feature. Radix introduce a new MMU model and strictly speaking it is a new MMU family. This also free up bits which can be used for

[PATCH 4/6] powerpc/mm/hash: Compute the segment size correctly for ISA 3.0

PowerISA 3.0 encodes the segment size in the second half of hash page table entry. Update hpte_decode accordingly. Fixes: 50de596de8be ("powerpc/mm/hash: Add support for Power9 Hash") Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/mm/hash_native_64.c | 5

[PATCH 2/6] powerpc/mm/radix: Update PID switch sequence

Update the PID switch as per ISA doc. slbia is needed in radix to invalidate any implementation specific lookaside information Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/mm/mmu_context_book3s64.c | 5 - 1 file changed, 4 insertions(+), 1 deletion(-)

[PATCH 6/6] powerpc/mm/hash: Add helper for finding SLBE LLP encoding

Replace opencoding of the same at multiple places with the helper. No functional change with this patch. Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/include/asm/book3s/64/mmu-hash.h | 9 + arch/powerpc/include/asm/kvm_book3s_64.h | 3 +--

[PATCH 3/6] powerpc/mm/hash: Update SDR1 size encoding as documented in ISA 3.0

ISA 3.0 document hash table size in bytes = 2^(HTABSIZE + 18) No functionality change by this patch. Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/mm/hash_utils_64.c | 9 - 1 file changed, 4 insertions(+), 5 deletions(-) diff --git

[PATCH 1/6] powerpc/mm/radix: Update LPCR only if it is powernv

LPCR cannot be updated when running in guest mode. Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/mm/pgtable-radix.c | 23 ++- 1 file changed, 10 insertions(+), 13 deletions(-) diff --git a/arch/powerpc/mm/pgtable-radix.c

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

Hi Masami, Thank you for reviewing the patch. On Wednesday 18 May 2016 08:43 PM, Masami Hiramatsu wrote: 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

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

On 19/05/16 16:22, Michael Ellerman wrote: Did you test the plugins with all gcc versions (4.5-6)? What's the concern about gcc versions? Just not breaking the build on old compilers? I'm pretty sure powerpc big endian still builds with gcc 4.4. gcc's plugin support only landed in 4.5, so we

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

On Wed, 2016-05-18 at 12:33 +0200, Emese Revfy wrote: > > 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