metag: OProfile support
Add OProfile support for metag, using the perf backend, and falling back
to generic timer based sampling if perf counter interrupt support is
disabled.
The oprofile code prepends "metag/" to the perf pmu name to give
"metag/meta2" which is more consistent with other oprofile arch names.
The backtrace code makes use of <asm/stacktrace.h> for kernel
backtracing, and a simple frame pointer walk for userland backtracing.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Robert Richter <rric@kernel.org>
Cc: oprofile-list@lists.sf.net
diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig
index afc8973..b06b418 100644
--- a/arch/metag/Kconfig
+++ b/arch/metag/Kconfig
@@ -25,6 +25,7 @@
select HAVE_MEMBLOCK
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_MOD_ARCH_SPECIFIC
+ select HAVE_OPROFILE
select HAVE_PERF_EVENTS
select HAVE_SYSCALL_TRACEPOINTS
select IRQ_DOMAIN
@@ -209,6 +210,9 @@
When disabled, Performance Counters information will be collected
based on Timer Interrupt.
+config HW_PERF_EVENTS
+ def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS
+
config METAG_DA
bool "DA support"
help
