linux - NXP/Freescale LSDK linux tree with Scalys patches

Age	Commit message (Collapse)	Author
2015-08-17	xtensa: implement fake NMI	Max Filippov
	In case perf IRQ is the highest of the medium-level IRQs, and is alone on its level, it may be treated as NMI: - LOCKLEVEL is defined to be one level less than EXCM level, - IRQ masking never lowers current IRQ level, - new fake exception cause code, EXCCAUSE_MAPPED_NMI is assigned to that IRQ; new second level exception handler, do_nmi, assigned to it handles it as NMI, - atomic operations in configurations without s32c1i still need to mask all interrupts. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2015-08-17	xtensa: implement counting and sampling perf events	Max Filippov
	Xtensa Performance Monitor Module has up to 8 32 bit wide performance counters. Each counter may be enabled independently and can count any single type of hardware performance events. Event counting may be enabled and disabled globally (per PMM). Each counter has status register with bits indicating if the counter has been overflown and may be programmed to raise profiling IRQ on overflow. This IRQ is used to rewind counters and allow for counting more than 2^32 samples for counting events and to report samples for sampling events. For more details see Tensilica Debug User's Guide, chapter 8 "Performance monitor module". Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>