oprofile and ARM A9 hardware counter

[Ming Lei]

Hi stephane & Will,

On Tue, Jan 10, 2012 at 8:46 AM, stephane eranian
<eranian at googlemail.com> wrote:
> See the dmesg from my 3.2 kernel:
>
>
> [    0.000000] Booting Linux on physical CPU 0[    0.000000]

Looks no obvious failure can be found from your 'dmesg'.

I have run upstream 3.2 kernel plus 6 omap4 pmu patches below and
found perf can work well on my panda board.

	0001-arm-introduce-cross-trigger-interface-helpers.patch
	0002-arm-pmu-allow-platform-specific-irq-enable-disable-h.patch
	0003-arm-omap4-hwmod-introduce-emu-hwmod.patch or Benoit's debugss patch[2]
	0004-arm-omap4-create-pmu-device-via-hwmod.patch[3]
	0005-arm-omap4-support-pmu.patch[4]
	0006-arm-omap4-pmu-support-runtime-pm.patch[5]

Could you verify the above patches on 3.2 to see if perf can work well?
If it doesn't, I may share my u-boot and mlo for your test if you'd like to do.

BTW: #1 and #2 have been in Will's -next tree.

thanks,
--
Ming Lei

[1], uname -a & cat /proc/interrupts
[root at root]#uname -a
Linux beagleboard 3.2.0+ #480 SMP PREEMPT Wed Jan 18 11:38:33 CST 2012
armv7l GNU/Linux
[root at root]#cat /proc/interrupts
           CPU0       CPU1
 29:      29014      17353       GIC  twd
 33:      56231          0       GIC  arm-pmu
 34:          0      25778       GIC  arm-pmu

[2], http://marc.info/?l=linux-omap&m=132162118104901&w=2
[3],http://marc.info/?t=132227621500002&r=1&w=2
[4],http://marc.info/?t=132227621700002&r=1&w=2
[5],http://marc.info/?t=132227621700003&r=1&w=2