From: Cody P Schafer <cody@linux.vnet.ibm.com>
Date: Fri, 14 Mar 2014 05:00:41 +0000 (+1100)
Subject: powerpc/perf: Add support for the hv gpci (get performance counter info) interface
X-Git-Tag: v3.15-rc1~124^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=220a0c609ad173f0130d7ecffbc70e5a9f8d2061;p=pandora-kernel.git

powerpc/perf: Add support for the hv gpci (get performance counter info) interface

This provides a basic link between perf and hv_gpci. Notably, it does
not yet support transactions and does not list any events (they can
still be manually composed).

Example usage via perf tool:

	perf stat -e 'hv_gpci/counter_info_version=3,offset=0,length=8,secondary_index=0,starting_index=0xffffffff,request=0x10/' -r 0 -C 0 -x ' ' sleep 0.1

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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