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Michael Ellerman fed4400cd4 powerpc/powernv: Fix opal_exit tracepoint opcode 
commit a7e0fb6c20 upstream.

Currently the opal_exit tracepoint usually shows the opcode as 0:

  <idle>-0     [047] d.h.   635.654292: opal_entry: opcode=63
  <idle>-0     [047] d.h.   635.654296: opal_exit: opcode=0 retval=0
  kopald-1209  [019] d...   636.420943: opal_entry: opcode=10
  kopald-1209  [019] d...   636.420959: opal_exit: opcode=0 retval=0

This is because we incorrectly load the opcode into r0 before calling
__trace_opal_exit(), whereas it expects the opcode in r3 (first function
parameter). In fact we are leaving the retval in r3, so opcode and
retval will always show the same value.

Instead load the opcode into r3, resulting in:

  <idle>-0     [040] d.h.   636.618625: opal_entry: opcode=63
  <idle>-0     [040] d.h.   636.618627: opal_exit: opcode=63 retval=0

Fixes: c49f63530b ("powernv: Add OPAL tracepoints")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-14 13:32:54 +02:00
..
boot powerpc/boot: Fix zImage TOC alignment 2017-03-26 12:13:19 +02:00
configs powerpc updates for 4.4 2015-11-05 23:38:43 -08:00
crypto crypto: powerpc/md5 - use md5 IV MD5_HX instead of their raw value 2015-05-18 12:20:20 +08:00
include KVM: PPC: Book3S HV: Save/restore XER in checkpointed register state 2017-01-09 08:07:49 +01:00
kernel powerpc/kprobe: Fix oops when kprobed on 'stdu' instruction 2017-04-27 09:09:33 +02:00
kvm KVM: PPC: Book3S PR: Fix illegal opcode emulation 2017-03-26 12:13:18 +02:00
lib powerpc: Emulation support for load/store instructions on LE 2017-03-18 19:09:57 +08:00
math-emu
mm powerpc/mm: Add missing global TLB invalidate if cxl is active 2017-04-12 12:38:34 +02:00
net net: filter: make JITs zero A for SKF_AD_ALU_XOR_X 2016-01-06 00:43:52 -05:00
oprofile powerpc: Remove mtmsrd(), use existing mtmsr() 2015-07-13 15:47:28 +10:00
perf powerpc updates for 4.4 2015-11-05 23:38:43 -08:00
platforms powerpc/powernv: Fix opal_exit tracepoint opcode 2017-05-14 13:32:54 +02:00
sysdev Merge branch 'for-4.4/io-poll' of git://git.kernel.dk/linux-block 2015-11-10 17:23:49 -08:00
xmon powerpc/xmon: Add some more elements to the existing PACA dump list 2015-10-15 20:32:02 +11:00
Kconfig powerpc/book3e-64: Enable kexec 2015-10-27 18:13:30 -05:00
Kconfig.debug powerpc: Make STRICT_MM_TYPECHECKS a config option 2015-05-11 19:53:59 +10:00
Makefile powerpc/cell: Drop CONFIG_TUNE_CELL in favour of CONFIG_CELL_CPU 2015-10-19 19:51:18 +11:00
relocs_check.sh powerpc: Convert relocs_check to a shell script using grep 2015-03-23 14:47:39 +11:00