Thomas Richter a029a4eab3 s390/cpumf: Allow concurrent access for CPU Measurement Counter Facility ... Commit cf6acb8bdb ("s390/cpumf: Add support for complete counter set extraction") allows access to the CPU Measurement Counter Facility via character device /dev/hwctr. The access was exclusive via this device or via perf_event_open() system call. Only one path at a time was permitted. The CPU Measurement Counter Facility device driver blocked access to other processes. This patch removes this restriction and allows concurrent access to the CPU Measurement Counter Facility from multiple processes at the same time via perf_event_open() SVC and via /dev/hwctr device. The access via /dev/hwctr device is still exclusive, only one process is allowed to access this device. This patch - moves the /dev/hwctr device access from file perf_cpum_cf_diag.c. to file perf_cpum_cf.c. - use only one trace buffer .../s390dbf/cpum_cf. - remove cfset_csd structure and includes its members it into the structure cpu_cf_events. This results in one data structure and simplifies the access. - rework function familiy ctr_set_enable, ctr_set_disable, ctr_set_start and ctr_set_stop which operate on a counter set number. Now they operate on a counter set bit mask. - move CF_DIAG event functionality to file perf_cpum_cf.c. It now contains the complete functionality of the CPU Measurement Counter Facility: - Performance measurement support for counters using perf stat. - Support for complete counter set extraction with device /dev/hwctr. - Support for counter set extraction event CF_DIAG attached to samples using perf record. - removes file perf_cpum_cf_diag.c Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>		2021-07-05 12:44:23 +02:00
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acpi	IOMMU Updates for Linux v5.14	2021-07-02 13:22:47 -07:00
asm-generic	asm-generic/unaligned: Unify asm/unaligned.h around struct helper	2021-07-02 12:43:40 -07:00
clocksource
crypto
drm
dt-bindings	sound updates for 5.14	2021-07-02 15:25:23 -07:00
keys
kunit	linux-kselftest-kunit-fixes-5.14-rc1	2021-07-02 12:58:26 -07:00
kvm
linux	s390/cpumf: Allow concurrent access for CPU Measurement Counter Facility	2021-07-05 12:44:23 +02:00
math-emu
media
memory
misc
net	Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2021-07-03 11:30:04 -07:00
pcmcia
ras
rdma
scsi	SCSI misc on 20210702	2021-07-02 15:14:36 -07:00
soc
sound	ASoC: Updates for v5.14	2021-07-01 08:36:12 +02:00
target
trace	Tracing updates for 5.14:	2021-07-03 11:13:22 -07:00
uapi	cxl for 5.14	2021-07-04 11:55:13 -07:00
vdso
video
xen