On Tue, Apr 16, 2013 at 09:24:10PM +0530, Anshuman Khandual wrote:
> This patch provides basic enablement for perf branch stack sampling framework
> on POWER8 processor with a new PMU feature called BHRB (Branch History Rolling
> Buffer).
>
> Signed-off-by: Anshuman Khandual <khand...@linux.vnet.ibm.com>
> ---
> arch/powerpc/perf/core-book3s.c | 96
> +++++++++++++++++++++++++++++++++++--
> arch/powerpc/perf/perf_event_bhrb.c | 85 ++++++++++++++++++++++++++++++++
> 2 files changed, 178 insertions(+), 3 deletions(-)
> create mode 100644 arch/powerpc/perf/perf_event_bhrb.c
>
> diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
> index 4ac6e64..f4d1347 100644
> --- a/arch/powerpc/perf/core-book3s.c
> +++ b/arch/powerpc/perf/core-book3s.c
> @@ -19,6 +19,8 @@
> #include <asm/firmware.h>
> #include <asm/ptrace.h>
>
> +#define BHRB_MAX_ENTRIES 32
> +
> struct cpu_hw_events {
> int n_events;
> int n_percpu;
> @@ -38,11 +40,21 @@ struct cpu_hw_events {
>
> unsigned int group_flag;
> int n_txn_start;
> +
> + /* BHRB bits */
> + u64 bhrb_filter; /* BHRB HW branch
> filter */
> + int bhrb_users;
> + void *bhrb_context;
> + struct perf_branch_stack bhrb_stack;
> + struct perf_branch_entry bhrb_entries[BHRB_MAX_ENTRIES];
> };
> +
> DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events);
>
> struct power_pmu *ppmu;
>
> +#include "perf_event_bhrb.c"
> +
Um, why are you doing that?
If it's code that should be in a header, put it in a header. If it's C
code, add it to the Makefile.
cheers
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