Alexander Shishkin 92ca7da4bd perf/x86/intel: Fix PT PMI handling ... Commit: ccbebba4c6 ("perf/x86/intel/pt: Bypass PT vs. LBR exclusivity if the core supports it") skips the PT/LBR exclusivity check on CPUs where PT and LBRs coexist, but also inadvertently skips the active_events bump for PT in that case, which is a bug. If there aren't any hardware events at the same time as PT, the PMI handler will ignore PT PMIs, as active_events reads zero in that case, resulting in the "Uhhuh" spurious NMI warning and PT data loss. Fix this by always increasing active_events for PT events. Fixes: ccbebba4c6 ("perf/x86/intel/pt: Bypass PT vs. LBR exclusivity if the core supports it") Reported-by: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Link: https://lkml.kernel.org/r/20191210105101.77210-1-alexander.shishkin@linux.intel.com		2019-12-17 13:32:46 +01:00
..
boot	ACPI updates for 5.5-rc1	2019-11-26 19:25:25 -08:00
configs
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2019-12-02 17:23:21 -08:00
entry	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-12-01 19:05:07 -08:00
events	perf/x86/intel: Fix PT PMI handling	2019-12-17 13:32:46 +01:00
hyperv	- Support for new VMBus protocols (Andrea Parri).	2019-11-30 14:50:51 -08:00
ia32
include	powerpc updates for 5.5 #2	2019-12-06 13:36:31 -08:00
kernel	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-12-01 19:05:07 -08:00
kvm	* PPC secure guest support	2019-12-04 11:08:30 -08:00
lib	perf/core improvements and fixes:	2019-11-29 06:56:05 +01:00
math-emu
mm	Merge branch 'akpm' (patches from Andrew)	2019-12-01 20:36:41 -08:00
net
oprofile
pci	pci-v5.5-changes	2019-12-03 13:58:22 -08:00
platform	- Core Frameworks	2019-12-01 16:16:31 -08:00
power
purgatory
ras
realmode
tools
um	y2038: syscall implementation cleanups	2019-12-01 14:00:59 -08:00
video
xen
.gitignore
Kbuild
Kconfig	x86/kasan: support KASAN_VMALLOC	2019-12-01 12:59:06 -08:00
Kconfig.cpu
Kconfig.debug
Makefile
Makefile_32.cpu
Makefile.um