Vaibhav Jain 2d02bf835e powerpc/papr_scm: Fetch nvdimm performance stats from PHYP ... Update papr_scm.c to query dimm performance statistics from PHYP via H_SCM_PERFORMANCE_STATS hcall and export them to user-space as PAPR specific NVDIMM attribute 'perf_stats' in sysfs. The patch also provide a sysfs ABI documentation for the stats being reported and their meanings. During NVDIMM probe time in papr_scm_nvdimm_init() a special variant of H_SCM_PERFORMANCE_STATS hcall is issued to check if collection of performance statistics is supported or not. If successful then a PHYP returns a maximum possible buffer length needed to read all performance stats. This returned value is stored in a per-nvdimm attribute 'stat_buffer_len'. The layout of request buffer for reading NVDIMM performance stats from PHYP is defined in 'struct papr_scm_perf_stats' and 'struct papr_scm_perf_stat'. These structs are used in newly introduced drc_pmem_query_stats() that issues the H_SCM_PERFORMANCE_STATS hcall. The sysfs access function perf_stats_show() uses value 'stat_buffer_len' to allocate a buffer large enough to hold all possible NVDIMM performance stats and passes it to drc_pmem_query_stats() to populate. Finally statistics reported in the buffer are formatted into the sysfs access function output buffer. Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200731064153.182203-2-vaibhav@linux.ibm.com		2020-07-31 22:55:27 +10:00
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ABI	powerpc/papr_scm: Fetch nvdimm performance stats from PHYP	2020-07-31 22:55:27 +10:00
PCI	pci-v5.8-changes	2020-06-06 11:01:58 -07:00
RCU	rcu: Make rcu_read_unlock_special() safe for rq/pi locks	2020-04-27 11:03:50 -07:00
accounting	…
admin-guide	powerpc/book3s64/radix: Add kernel command line option to disable radix GTSE	2020-07-29 21:09:37 +10:00
arm	docs: dt: convert ABI.txt to ReST format	2020-05-04 17:09:52 -05:00
arm64	docs/arm64: Fix typo'd #define in sve.rst	2020-06-15 13:17:43 +01:00
block	for-5.8-tag	2020-06-02 19:59:25 -07:00
bpf	docs/bpf: Add BPF ring buffer design notes	2020-06-01 14:38:22 -07:00
cdrom	…
core-api	powerpc/pseries: remove cede offline state for CPUs	2020-07-16 13:12:34 +10:00
cpu-freq	…
crypto	…
dev-tools	kcsan: Update Documentation to change supported compilers	2020-06-11 20:04:02 +02:00
devicetree	Merge branch 'i2c/for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2020-06-13 13:12:38 -07:00
doc-guide	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
driver-api	Documentation: media: convert to use i2c_new_client_device()	2020-06-19 09:20:25 +02:00
fault-injection	…
fb	media updates for v5.8-rc1	2020-06-03 20:59:38 -07:00
features	powerpc: Select ARCH_HAS_MEMBARRIER_SYNC_CORE	2020-07-23 17:43:23 +10:00
filesystems	This is the second round of ext4 commits for 5.8 merge window. It	2020-06-15 09:32:10 -07:00
firmware-guide	usb: typec: Add firmware documentation for the Intel PMC mux control	2020-05-13 14:20:49 +02:00
firmware_class	…
fpga	Documentation: fpga: dfl: add description for performance reporting support	2020-04-28 15:49:28 +02:00
gpu	drm/amdgpu: fix documentation around busy_percentage	2020-06-17 17:42:43 -04:00
hid	…
hwmon	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next	2020-06-03 16:27:18 -07:00
i2c	Documentation/i2c: SMBus start signal is S not A	2020-06-19 09:21:48 +02:00
ia64	docs: add IRQ documentation at the core-api book	2020-05-15 12:00:56 -06:00
ide	…
iio	docs: filesystems: convert configfs.txt to ReST	2020-05-05 09:23:25 -06:00
infiniband	RDMA/core: Remove FMR device ops	2020-06-02 20:32:54 -03:00
input	…
isdn	…
kbuild	kbuild: doc: rename LDFLAGS to KBUILD_LDFLAGS	2020-06-06 23:39:20 +09:00
kernel-hacking	…
leds	…
livepatch	livepatch: Remove .klp.arch	2020-05-08 00:12:42 +02:00
locking	A fair amount of stuff this time around, dominated by yet another massive	2020-06-01 15:45:27 -07:00
m68k	…
maintainer	Documentation: fixes to the maintainer-entry-profile template	2020-06-01 09:36:07 -06:00
mhi	…
mips	…
misc-devices	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
netlabel	…
networking	docs: networkng: convert sja1105's devlink info to RTS	2020-06-10 17:07:04 -07:00
nios2	…
nvdimm	nvdimm: fixes to maintainter-entry-profile	2020-05-25 10:19:19 -06:00
openrisc	…
parisc	…
pcmcia	…
power	Power management updates for 5.8-rc1	2020-06-02 13:17:23 -07:00
powerpc	Merge branch 'scv' support into next	2020-07-23 17:43:44 +10:00
process	Merge branch 'rwonce/rework' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux	2020-06-10 14:46:54 -07:00
riscv	…
s390	s390 updates for the 5.8 merge window	2020-06-08 12:05:31 -07:00
scheduler	…
scsi	…
security	Notifications over pipes + Keyring notifications	2020-06-13 09:56:21 -07:00
sh	Documentation: remove SH-5 index entries	2020-06-16 17:39:43 -07:00
sound	…
sparc	…
sphinx	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
sphinx-static	…
spi	…
target	doc: don't use deprecated "---help---" markers in target docs	2020-06-13 13:32:40 -07:00
timers	timer: add fsleep for flexible sleeping	2020-05-06 17:03:34 -07:00
trace	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
translations	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
usb	A fair amount of stuff this time around, dominated by yet another massive	2020-06-01 15:45:27 -07:00
userspace-api	Documentation: media: convert to use i2c_new_client_device()	2020-06-19 09:20:25 +02:00
virt	KVM: PPC: Book3S HV: Save/restore new PMU registers	2020-07-22 21:56:41 +10:00
vm	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
w1	w1_therm: adding bulk read support to trigger multiple conversion on bus	2020-05-15 16:29:00 +02:00
watchdog	watchdog: clarify that stop() is optional	2020-05-25 08:55:42 +02:00
x86	A fair amount of stuff this time around, dominated by yet another massive	2020-06-01 15:45:27 -07:00
xtensa	…
.gitignore	…
COPYING-logo	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
Changes	…
CodingStyle	…
Kconfig	…
Makefile	media updates for v5.8-rc1	2020-06-03 20:59:38 -07:00
SubmittingPatches	…
asm-annotations.rst	…
atomic_bitops.txt	…
atomic_t.txt	…
bus-virt-phys-mapping.txt	…
conf.py	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
crc32.txt	…
docutils.conf	…
dontdiff	modpost: generate vmlinux.symvers and reuse it for the second modpost	2020-06-06 23:38:12 +09:00
index.rst	Devicetree updates for v5.8:	2020-06-04 20:11:25 -07:00
kprobes.txt	…
logo.gif	…
lzo.txt	lib/lzo: fix ambiguous encoding bug in lzo-rle	2020-06-11 18:17:47 -07:00
mailbox.txt	…
memory-barriers.txt	libnvdimm/nvdimm/flush: Allow architecture to override the flush barrier	2020-07-16 13:00:22 +10:00
nommu-mmap.txt	…
remoteproc.txt	…
rpmsg.txt	…
speculation.txt	…
static-keys.txt	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
tee.txt	…
this_cpu_ops.txt	…
watch_queue.rst	pipe: Add general notification queue support	2020-05-19 15:08:24 +01:00
xz.txt	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00