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9d5171a8f2
linux/arch/powerpc/platforms/powernv
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Rashmica Gupta 9d5171a8f2 powerpc/powernv: Enable removal of memory for in memory tracing 
The hardware trace macro feature requires access to a chunk of real
memory. This patch provides a debugfs interface to do this. By
writing an integer containing the size of memory to be unplugged into
/sys/kernel/debug/powerpc/memtrace/enable, the code will attempt to
remove that much memory from the end of each NUMA node.

This patch also adds additional debugsfs files for each node that
allows the tracer to interact with the removed memory, as well as
a trace file that allows userspace to read the generated trace.

Note that this patch does not invoke the hardware trace macro, it
only allows memory to be removed during runtime for the trace macro
to utilise.

Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com>
[mpe: Minor formatting etc fixups]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-24 22:14:38 +10:00
..
eeh-powernv.c powerpc/powernv/pci: Dynamically allocate PHB diag data 2017-06-27 12:14:27 +10:00
idle.c Merge branch 'fixes' into next 2017-08-23 22:20:10 +10:00
Kconfig powerpc/powernv: Enable removal of memory for in memory tracing 2017-08-24 22:14:38 +10:00
Makefile powerpc/powernv: Enable removal of memory for in memory tracing 2017-08-24 22:14:38 +10:00
memtrace.c powerpc/powernv: Enable removal of memory for in memory tracing 2017-08-24 22:14:38 +10:00
npu-dma.c powerpc/powernv/npu-dma: Add explicit flush when sending an ATSD 2017-06-22 21:21:08 +10:00
opal-async.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
opal-dump.c powerpc/powernv : Drop reference added by kset_find_obj() 2016-08-29 12:48:21 +10:00
opal-elog.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
opal-flash.c powerpc: Add const to bin_attribute structures 2017-08-17 21:56:26 +10:00
opal-hmi.c powerpc/powernv: Display the correct error info for CAPP errors. 2017-02-09 10:31:36 +11:00
opal-imc.c powerpc/perf: Add nest IMC PMU support 2017-07-25 22:55:45 +10:00
opal-irqchip.c powerpc/opal-irqchip: Use interrupt names if present 2017-02-09 10:31:37 +11:00
opal-kmsg.c powerpc/powernv: Fix OPAL_CONSOLE_FLUSH prototype and usages 2016-01-13 12:35:17 +11:00
opal-lpc.c powerpc: Create asm/debugfs.h and move powerpc_debugfs_root there 2017-04-11 07:46:03 +10:00
opal-memory-errors.c powerpc/powernv: Fix spelling mistake "Retrived" -> "Retrieved" 2016-06-28 13:52:18 +10:00
opal-msglog.c powerpc/powernv: Report size of OPAL memcons log 2017-01-25 13:33:55 +11:00
opal-nvram.c powerpc/powernv: Add pstore support on powernv 2015-03-23 14:06:10 +11:00
opal-power.c powerpc/powernv: Add poweroff (EPOW, DPO) events support for PowerNV platform 2015-07-16 13:34:36 +10:00
opal-powercap.c powerpc/powernv: Add support for powercap framework 2017-08-10 22:39:53 +10:00
opal-prd.c powerpc/powernv: use memdup_user 2017-07-24 21:48:42 +10:00
opal-psr.c powerpc/powernv: Add support to set power-shifting-ratio 2017-08-10 22:40:01 +10:00
opal-rtc.c powerpc/powernv: Only delay opal_rtc_read() retry when necessary 2015-12-27 19:12:40 +11:00
opal-sensor-groups.c powerpc/powernv: Add support to clear sensor groups data 2017-08-10 22:40:05 +10:00
opal-sensor.c powerpc/powernv: Handle OPAL_WRONG_STATE in opal_get_sensor_data() 2017-03-31 15:22:56 +11:00
opal-sysparam.c powerpc/opal: Add inline function to get rc from an ASYNC_COMP opal_msg 2016-06-29 17:33:18 +10:00
opal-tracepoints.c tracing: Have the reg function allow to fail 2016-12-09 09:13:30 -05:00
opal-wrappers.S powerpc/powernv: Add support to clear sensor groups data 2017-08-10 22:40:05 +10:00
opal-xscom.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
opal.c powerpc/powernv: Add support to clear sensor groups data 2017-08-10 22:40:05 +10:00
pci-cxl.c powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
pci-ioda.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
pci.c powerpc/powernv: Enable PCI peer-to-peer 2017-08-08 11:27:30 +10:00
pci.h powerpc/powernv: Enable PCI peer-to-peer 2017-08-08 11:27:30 +10:00
powernv.h powerpc/powernv: Move CPU-Offline idle state invocation from smp.c to idle.c 2017-04-11 08:45:09 +10:00
rng.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
setup.c powerpc/powernv: Tell OPAL about our MMU mode on POWER9 2017-07-10 21:12:27 +10:00
smp.c powerpc/powernv: Clear PECE1 in LPCR via stop-api only on Hotplug 2017-08-01 21:01:28 +10:00
subcore-asm.S powerpc/powernv: Add support for POWER8 split core on powernv 2014-05-28 13:35:37 +10:00
subcore.c powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
subcore.h powernv/powerpc: Add winkle support for offline cpus 2014-12-15 10:46:41 +11:00