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Wei Huang fc116efad0 kvm_stat: Add RESET support for perf event ioctl 
While running kvm_stat using tracepoint on ARM64 hardware (e.g. "kvm_stat
-1 -t"), the initial values of some kvm_userspace_exit counters were found
to be very suspecious. For instance the tracing tool showed that S390_TSCH
was called many times on ARM64 machine, which apparently was wrong.

This patch adds RESET ioctl support for perf monitoring. Before calling
ioctl to enable a perf event, this patch resets the counter first. With
this patch, the init counter values become correct on ARM64 hardware.

Example:

==== before patch ====
kvm_userspace_exit(S390_SIEIC)      1426         0
kvm_userspace_exit(S390_TSCH)       339         0

==== after patch ====
kvm_userspace_exit(S390_SIEIC)         0         0
kvm_userspace_exit(S390_TSCH)         0         0

Signed-off-by: Wei Huang <wei@redhat.com>
2015-01-26 12:27:05 +01:00
..
kvm kvm_stat: Add RESET support for perf event ioctl 2015-01-26 12:27:05 +01:00
qemu-guest-agent qemu-ga: sample fsfreeze hooks 2013-01-08 16:38:12 -06:00
qmp qmp: Check for returned data from __json_read in get_events 2014-02-28 13:35:53 -05:00
tracetool Tracing: Fix simpletrace.py error on tcg enabled binary traces 2014-11-18 14:05:58 +00:00
acpi_extract_preprocess.py i386: add ACPI table files from seabios 2013-10-14 17:48:51 +03:00
acpi_extract.py i386: Add an ACPI_EXTRACT_NAME_BUFFER16 directive. 2014-11-02 11:52:24 +02:00
analyse-9p-simpletrace.py scripts/analyse-9p-simpletrace.py: Add symbolic names for 9p operations. 2011-12-21 12:37:23 +05:30
check-qerror.sh qerror: add check-qerror.sh to verify alphabetical order 2012-01-18 10:23:39 -02:00
checkpatch.pl checkpatch: Brace handling on multi-line condition 2015-01-13 11:47:56 +00:00
cleanup-trace-events.pl cleanup-trace-events.pl: Tighten search for trace event call 2014-09-26 09:34:38 +01:00
coverity-model.c scripts: add sample model file for Coverity Scan 2014-04-18 10:33:36 +04:00
create_config module: implement module loading 2014-02-20 13:14:18 +01:00
disas-objdump.pl disas-objdump: Pass --adjust-vma to objdump 2013-08-24 07:26:45 +02:00
dump-guest-memory.py Python-lang gdb script to extract x86_64 guest vmcore from qemu coredump 2014-01-26 13:06:48 +02:00
extract-vsssdk-headers Add a script to extract VSS SDK headers on POSIX system 2013-09-09 14:17:56 -05:00
feature_to_c.sh exec: move include files to include/exec/ 2012-12-19 08:31:31 +01:00
get_maintainer.pl get_maintainer.pl: Remove the --git-chief-penguins option 2014-12-10 11:46:43 +03:00
gtester-cat test makefile overhaul 2012-03-30 08:14:11 -05:00
hxtool vl.c: In qemu -h output, only print options for the arch we are running as 2011-12-19 10:27:33 -06:00
make_device_config.sh make_device_config.sh: Emit dependency file to directory where included 2013-03-09 12:00:03 +00:00
make-release make-release: Record SeaBIOS version 2014-03-31 15:02:04 +01:00
ordereddict.py qapi: add ordereddict.py helper library 2011-07-21 16:48:14 -03:00
qapi-commands.py qapi: Suppress unwanted space between type and identifier 2014-06-23 11:01:24 -04:00
qapi-event.py qapi script: clean up in scripts 2014-06-27 09:27:56 -04:00
qapi-types.py scripts/qapi-types.py: Add dummy member to empty structs 2015-01-20 15:19:32 +00:00
qapi-visit.py qapi: add visit_start_union and visit_end_union 2014-09-26 13:14:10 -04:00
qapi.py qapi.py: avoid Python 2.5+ any() function 2014-08-28 13:42:25 +01:00
qemu-binfmt-conf.sh scripts/qemu-binfmt-conf.sh: Add AArch64 registration 2014-03-17 16:31:53 +00:00
qemu-gdb.py scripts: add gdb support script 2012-03-24 12:57:02 +00:00
refresh-pxe-roms.sh roms: rewrite scripts/refresh-pxe-roms.sh 2013-09-30 09:44:35 +02:00
signrom.py signrom: Rewrite as python script 2012-04-16 15:41:20 +02:00
simpletrace.py simpletrace: add simpletrace.py --no-header option 2014-08-12 14:26:11 +01:00
switch-timer-api misc: Fix case Qemu -> QEMU 2014-02-15 16:10:25 +04:00
texi2pod.pl Support utf8 chars in pod docs 2012-03-24 14:10:25 +00:00
tracetool.py trace: Multi-backend tracing 2014-06-09 15:43:40 +02:00
update-acpi.sh acpi: add rules to compile ASL source 2013-10-14 17:48:51 +03:00
update-linux-headers.sh linux-headers: include psci.h 2014-06-16 13:24:41 +02:00
vmstate-static-checker.py checker: ignore fields marked unused 2014-08-04 15:02:37 +05:30