https://github.com/torvalds/linux
Revision 2fe1bc1f501d55e5925b4035bcd85781adc76c63 authored by Andi Kleen on 31 August 2017, 21:46:30 UTC, committed by Ingo Molnar on 17 December 2017, 12:55:17 UTC
[ Note, this is a Git cherry-pick of the following commit:
a47ba4d77e12 ("perf/x86: Enable free running PEBS for REGS_USER/INTR")
... for easier x86 PTI code testing and back-porting. ]
Currently free running PEBS is disabled when user or interrupt
registers are requested. Most of the registers are actually
available in the PEBS record and can be supported.
So we just need to check for the supported registers and then
allow it: it is all except for the segment register.
For user registers this only works when the counter is limited
to ring 3 only, so this also needs to be checked.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170831214630.21892-1-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
1 parent f2dbad3
Tip revision: 2fe1bc1f501d55e5925b4035bcd85781adc76c63 authored by Andi Kleen on 31 August 2017, 21:46:30 UTC
perf/x86: Enable free running PEBS for REGS_USER/INTR
perf/x86: Enable free running PEBS for REGS_USER/INTR
Tip revision: 2fe1bc1
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| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
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| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 96.2 KB |
| Kbuild | -rw-r--r-- | 2.2 KB |
| Kconfig | -rw-r--r-- | 287 bytes |
| MAINTAINERS | -rw-r--r-- | 420.4 KB |
| Makefile | -rw-r--r-- | 58.4 KB |
| README | -rw-r--r-- | 722 bytes |
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