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[Bug 1048056] [NEW] perf_event_open syscall fails for HW counters on Pandaboard


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On Pandaboard perf_event_open syscall fails with errno = 19 (ENODEV)
when trying to open perf counter with type PERF_TYPE_HARDWARE.

The code to reproduce the error is attached. I checked that it runs
successfully on Beagleboard, Sandy Bridge, Bulldozer systems, and even
on Pandaboard if I request software events (e.g. type =

Linux Kernel (uname -a): Linux pandaboard 3.2.0-1418-omap4 #25-Ubuntu SMP PREEMPT Fri Aug 31 18:41:31 UTC 2012 armv7l armv7l armv7l GNU/Linux
Distribution: Ubuntu Server 12.04
Loaded kernel modules (lsmod): cpufreq_powersave, cpufreq_conservative, cpufreq_userspace, cpufreq_ondemand, dm_crypt, wl12xx_sdio, wl12xx, mac80211, twl6040_vibra, ff_memless, cfg80211, leds_gpio
Kernel log (dmesg): contains message "hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available"
/proc/cpuinfo content:
Processor	: ARMv7 Processor rev 10 (v7l)
processor	: 0
BogoMIPS	: 696.39

processor	: 1
BogoMIPS	: 681.68

Features	: swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x2
CPU part	: 0xc09
CPU revision	: 10

Hardware	: OMAP4 Panda board
Revision	: 0020
Serial		: 0000000000000000

** Affects: linaro-landing-team-ti
     Importance: Undecided
         Status: New

** Tags: kernel pandaboard
perf_event_open syscall fails for HW counters on Pandaboard
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