Re: [PATCH 2/2] powerpc/tm: test for regs sanity in VSX exception

On Thu, 2017-06-29 at 20:44 -0400, Gustavo Romero wrote: > Add a test to check if FP/VSX registers are sane (restored correctly) after > a VSX unavailable exception is caught in the middle of a transaction. > > Signed-off-by: Gustavo Romero > Signed-off-by: Breno

Re: [1/3] cpuidle: powerpc: cpuidle set polling before enabling irqs

"Rafael J. Wysocki" writes: > On Fri, Jun 30, 2017 at 5:45 AM, Michael Ellerman wrote: >> "Rafael J. Wysocki" writes: >> >>> On Thu, Jun 29, 2017 at 2:21 PM, Michael Ellerman >>> wrote: On Wed,

[PATCH] powerpc/smp: Get cpu only after validity check

Check for validity of cpu before calling get_hard_smp_processor_id. Found with coverity. Signed-off-by: Santosh Sivaraj --- arch/powerpc/platforms/powernv/smp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/powernv/smp.c

Re: [PATCH 1/2] powerpc/tm: fix live state of vs0/32 in tm_reclaim

On Fri, 2017-06-30 at 13:41 -0300, Breno Leitao wrote: > Thanks Gustavo for the patch. > > On Thu, Jun 29, 2017 at 08:39:23PM -0400, Gustavo Romero wrote: > > Currently tm_reclaim() can return with a corrupted vs0 (fp0) or vs32 (v0) > > due to the fact vs0 is used to save FPSCR and vs32 is used

[PATCH] selftests/powerpc: context_switch: Fix pthread errors

Turns out pthreads returns an errno and doesn't set errno. This doesn't play well with perror(). Signed-off-by: Cyril Bur --- .../selftests/powerpc/benchmarks/context_switch.c| 16 +--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git

Re: [PATCH 1/2] powerpc/tm: fix live state of vs0/32 in tm_reclaim

On Thu, 2017-06-29 at 20:44 -0400, Gustavo Romero wrote: > Currently tm_reclaim() can return with a corrupted vs0 (fp0) or vs32 (v0) > due to the fact vs0 is used to save FPSCR and vs32 is used to save VSCR. > > Later, we recheckpoint trusting that the live state of FP and VEC are ok > depending

[PATCH] powerpc/mm: Implemented default_hugepagesz verification for powerpc

Implemented default hugepage size verification (default_hugepagesz=) in order to allow allocation of defined number of pages (hugepages=) only for supported hugepage sizes. Signed-off-by: Victor Aoqui --- arch/powerpc/mm/hugetlbpage.c | 15 +++ 1 file changed, 15

[PATCH] powerpc/mm: Check gigantic page range correctly inside memblock

The gigantic page range received from platform actually extends upto (block_size * expeted_pages) starting at any given address instead of just a single 16GB page. Fixes: 4792adbac9eb ("powerpc: Don't use a 16G page if beyond mem= limits") Signed-off-by: Anshuman Khandual

[selftest/powerpc] mainline kernel panics with tm/tm-signal-context-chk-vsx.c tests

Hi, Today's mainline kernel panics and machine rebooted when running kernel selftest on powerpc. Test: tm/tm-signal-context-chk-vsx.c kernel version : 4.12.0-rc7 Machine : Power 8 Bare-metal config: attached, config_4k_pages gcc: 4.8.5 kernel traces: -- tm-signal-msr-r[39659]: bad

Re: [linux-next] SMT off triggers WARNING: CPU: 1 PID: 13 at arch/powerpc/kernel/watchdog.c:314 stop_wd_on_cpu+0x54/0xf0

* Abdul Haleem wrote (on 2017-07-03 11:25:18 +0530): > Hi, > > Today's next-20170630 on powerpc shows warnings in dmesg when SMT is > disabled. Fix provided by Nick: https://lkml.org/lkml/2017/6/30/143 Thanks, Santosh > > Test: SMT off > kernel:

[PATCH v12 06/10] powerpc/powernv: Core IMC events detection

From: Madhavan Srinivasan This patch adds support for detection of core IMC events along with the Nest IMC events. It adds a new domain IMC_DOMAIN_CORE and its determined with the help of the "type" property in the IMC device tree. Signed-off-by: Anju T Sudhakar

[PATCH v12 03/10] powerpc/powernv: Detect supported IMC units and its events

From: Madhavan Srinivasan Parse device tree to detect IMC units. Traverse through each IMC unit node to find supported events and corresponding unit/scale files (if any). The device tree for IMC counters starts at the node "imc-counters". This node contains all the IMC

[PATCH v12 04/10] powerpc/perf: Add generic IMC pmu group and event functions

Device tree IMC driver code parses the IMC units and their events. It passes the information to IMC pmu code which is placed in powerpc/perf as "imc-pmu.c". Patch adds a set of generic imc pmu related event functions to be used by each imc pmu unit. Add code to setup format attribute and to

[PATCH v12 10/10] powerpc/perf: Thread IMC PMU functions

Code to add support for thread IMC on cpuhotplug. When a cpu goes offline, the LDBAR for that cpu is disabled, and when it comes back online the previous ldbar value is written back to the LDBAR for that cpu. To register the hotplug functions for thread_imc, a new state

[PATCH v12 01/10] powerpc/powernv: Data structure and macros definitions for IMC

From: Madhavan Srinivasan Create a new header file to add the data structures and macros needed for In-Memory Collection (IMC) counter support. Signed-off-by: Anju T Sudhakar Signed-off-by: Hemant Kumar

[PATCH v12 08/10] powerpc/powernv: Thread IMC events detection

Code to add support for detection of thread IMC events. It adds a new domain IMC_DOMAIN_THREAD and it is determined with the help of the "type" property in the imc device-tree. Signed-off-by: Anju T Sudhakar Signed-off-by: Hemant Kumar

Re: [RFC PATCH 1/2] powerpc/xive: guest exploitation of the XIVE interrupt controller

On 07/03/2017 06:19 AM, Benjamin Herrenschmidt wrote: > On Mon, 2017-07-03 at 13:55 +1000, David Gibson wrote: >>> Calls that still need to be addressed : >>> >>> H_INT_SET_OS_REPORTING_LINE >>> H_INT_GET_OS_REPORTING_LINE >>> H_INT_ESB >>> H_INT_SYNC >> >> So, does this mean

[PATCH v12 09/10] powerpc/perf: Thread IMC PMU functions

Code to add PMU functions required for event initialization, read, update, add, del etc. for thread IMC PMU. Thread IMC PMUs are used for per-task monitoring. For each CPU, a page of memory is allocated and is kept static i.e., these pages will exist till the machine shuts down. The base address

Re: [PATCH 1/1] futex: remove duplicated code and fix UB

On Mon, 26 Jun 2017, Jiri Slaby wrote: > On 06/23/2017, 09:51 AM, Thomas Gleixner wrote: > > On Wed, 21 Jun 2017, Jiri Slaby wrote: > >> diff --git a/arch/arm64/include/asm/futex.h > >> b/arch/arm64/include/asm/futex.h > >> index f32b42e8725d..5bb2fd4674e7 100644 > >> ---

[PATCH v12 00/10] IMC Instrumentation Support

Power9 has In-Memory-Collection (IMC) infrastructure which contains various Performance Monitoring Units (PMUs) at Nest level (these are on-chip but off-core), Core level and Thread level.

[PATCH v12 07/10] powerpc/perf: PMU functions for Core IMC and hotplugging

From: Madhavan Srinivasan Code to add PMU function to initialize a core IMC event. It also adds cpumask initialization function for core IMC PMU.

[PATCH v12 02/10] powerpc/powernv: Autoload IMC device driver module

Code to create platform device for the IMC counters. Paltform devices are created based on the IMC compatibility string. New Config flag "CONFIG_HV_PERF_IMC_CTRS" add to contain the IMC counter changes. Signed-off-by: Anju T Sudhakar Signed-off-by: Hemant Kumar

[PATCH v12 05/10] powerpc/perf: IMC pmu cpumask and cpuhotplug support

Adds cpumask attribute to be used by each IMC pmu. Only one cpu (any online CPU) from each chip for nest PMUs is designated to read counters. On CPU hotplug, dying CPU is checked to see whether it

[PATCH v6 05/10] powerpc/xmon: Add patch_instruction() support for xmon

From: Balbir Singh Move from mwrite() to patch_instruction() for xmon for breakpoint addition and removal. Signed-off-by: Balbir Singh Signed-off-by: Michael Ellerman --- arch/powerpc/xmon/xmon.c | 7 +-- 1 file changed,

Re: [v3, 1/8] powerpc/perf/hv-24x7: Fix passing of catalog version number

Michael Ellerman writes: > On Thu, 2017-06-29 at 21:55:31 UTC, Thiago Jung Bauermann wrote: >> H_GET_24X7_CATALOG_PAGE needs to be passed the version number obtained from >> the first catalog page obtained previously. This is a 64 bit number, but >>

Re: [PATCH] powerpc: dts: use #include "..." to include local DT

Masahiro Yamada writes: > Hi Michael, > > Ping. Please apply this patch. > > I need this to clean up Makefiles in the next development cycle. Sorry for some reason it didn't land in patchwork, so I keep forgetting about it. Have merged it now for 4.13. cheers

[PATCH v6 04/10] powerpc/kprobes/optprobes: Use patch_instruction()

From: Balbir Singh So that we can implement STRICT_RWX, use patch_instruction() in optprobes. Signed-off-by: Balbir Singh Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/optprobes.c | 53

[PATCH v6 08/10] powerpc/mm/hash: Implement mark_rodata_ro() for hash

From: Balbir Singh With hash we update the bolted pte to mark it read-only. We rely on the MMU_FTR_KERNEL_RO to generate the correct permissions for read-only text. The radix implementation just prints a warning in this implementation Signed-off-by: Balbir Singh

[PATCH v6 07/10] powerpc/vmlinux.lds: Align __init_begin to 16M

From: Balbir Singh For CONFIG_STRICT_KERNEL_RWX align __init_begin to 16M. We use 16M since its the larger of 2M on radix and 16M on hash for our linear mapping. The plan is to have .text, .rodata and everything upto __init_begin marked as RX. Note we still have executable

[PATCH v6 01/10] powerpc/pseries: Fix passing of pp0 in updatepp() and updateboltedpp()

From: Balbir Singh Once upon a time there were only two PP (page protection) bits. In ISA 2.03 an additional PP bit was added, but because of the layout of the HPTE it could not be made contiguous with the existing PP bits. The result is that we now have three PP bits,

[PATCH v6 06/10] powerpc/lib/code-patching: Use alternate map for patch_instruction()

From: Balbir Singh This patch creates the window using text_poke_area, allocated via get_vm_area(). text_poke_area is per CPU to avoid locking. text_poke_area for each cpu is setup using late_initcall, prior to setup of these alternate mapping areas, we continue to use

[PATCH v6 09/10] powerpc/mm/radix: Implement STRICT_RWX/mark_rodata_ro() for Radix

From: Balbir Singh The Radix linear mapping code (create_physical_mapping()) tries to use the largest page size it can at each step. Currently the only reason it steps down to a smaller page size is if the start addr is unaligned (never happens in practice), or the end of

[PATCH v6 03/10] powerpc/kprobes: Move kprobes over to patch_instruction()

From: Balbir Singh arch_arm/disarm_probe() use direct assignment for copying instructions, replace them with patch_instruction(). We don't need to call flush_icache_range() because patch_instruction() does it for us. Signed-off-by: Balbir Singh

[PATCH v6 02/10] powerpc/mm/radix: Fix execute permissions for interrupt_vectors

From: Balbir Singh Commit 9abcc981de97 ("powerpc/mm/radix: Only add X for pages overlapping kernel text") changed the linear mapping on Radix to only mark the kernel text executable. However if the kernel is run relocated, for example as a kdump kernel, then the exception

[PATCH v6 10/10] powerpc/Kconfig: Enable STRICT_KERNEL_RWX for some configs

From: Balbir Singh All code that patches kernel text has been moved over to using patch_instruction() and patch_instruction() is able to cope with the kernel text being read only. The linker script has been updated to ensure the read only data ends on a large page

Re: [next-20170609] Oops while running CPU off-on (cpuset.c/cpuset_can_attach)

On Tue, 2017-06-27 at 11:36 -0400, Tejun Heo wrote: > Hello, Abdul. > > Sorry about the long delay. > > On Mon, Jun 12, 2017 at 04:53:42PM +0530, Abdul Haleem wrote: > > linux-next kernel crashed while running CPU offline and online. > > > > Machine: Power 8 LPAR > > Kernel :