Thomas Gleixner dd86e373e0 perf/x86/intel/rapl: Make package handling more robust ... The package management code in RAPL relies on package mapping being available before a CPU is started. This changed with: 9d85eb9119 ("x86/smpboot: Make logical package management more robust") because the ACPI/BIOS information turned out to be unreliable, but that left RAPL in broken state. This was not noticed because on a regular boot all CPUs are online before RAPL is initialized. A possible fix would be to reintroduce the mess which allocates a package data structure in CPU prepare and when it turns out to already exist in starting throw it away later in the CPU online callback. But that's a horrible hack and not required at all because RAPL becomes functional for perf only in the CPU online callback. That's correct because user space is not yet informed about the CPU being onlined, so nothing caan rely on RAPL being available on that particular CPU. Move the allocation to the CPU online callback and simplify the hotplug handling. At this point the package mapping is established and correct. This also adds a missing check for available package data in the event_init() function. Reported-by: Yasuaki Ishimatsu <yasu.isimatu@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Fixes: 9d85eb9119 ("x86/smpboot: Make logical package management more robust") Link: http://lkml.kernel.org/r/20170131230141.212593966@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>		2017-02-01 08:37:27 +01:00
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amd	perf/x86/amd/ibs: Fix typo after cleanup state names in cpu/hotplug	2016-12-27 11:42:12 +01:00
intel	perf/x86/intel/rapl: Make package handling more robust	2017-02-01 08:37:27 +01:00
core.c	perf/x86: Reject non sampling events with precise_ip	2017-01-14 11:06:50 +01:00
Kconfig	perf/x86: Move Kconfig.perf and other perf configuration bits to events/Kconfig	2016-03-31 10:30:40 +02:00
Makefile	x86/perf/intel/uncore: Make the Intel uncore PMU driver modular	2016-03-31 10:30:34 +02:00
msr.c	Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-07-30 12:56:26 -07:00
perf_event.h	perf/x86: Fix exclusion of BTS and LBR for Goldmont	2016-12-11 13:06:09 +01:00