diff options
| author | Anton Blanchard <anton@samba.org> | 2012-06-26 05:01:36 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-07-10 13:18:41 +0400 |
| commit | 75382aa72f06823db7312ad069c3bae2eb3f8548 (patch) | |
| tree | d345dbb162b14375d20a622a0801fd9a93cf1c1c /arch/powerpc/include/asm/perf_event.h | |
| parent | 68b30bb9f0fed8281fe8a1ac818d6d07c803fa7b (diff) | |
| download | linux-75382aa72f06823db7312ad069c3bae2eb3f8548.tar.xz | |
powerpc/perf: Move code to select SIAR or pt_regs into perf_read_regs
The logic to choose whether to use the SIAR or get the information
out of pt_regs is going to get more complicated, so do it once in
perf_read_regs.
We overload regs->result which is gross but we are already doing it
with regs->dsisr.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/perf_event.h')
| -rw-r--r-- | arch/powerpc/include/asm/perf_event.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/perf_event.h b/arch/powerpc/include/asm/perf_event.h index 5c16b891d501..0bb23725b1e7 100644 --- a/arch/powerpc/include/asm/perf_event.h +++ b/arch/powerpc/include/asm/perf_event.h @@ -26,8 +26,13 @@ #include <asm/ptrace.h> #include <asm/reg.h> +/* + * Overload regs->result to specify whether we should use the MSR (result + * is zero) or the SIAR (result is non zero). + */ #define perf_arch_fetch_caller_regs(regs, __ip) \ do { \ + (regs)->result = 0; \ (regs)->nip = __ip; \ (regs)->gpr[1] = *(unsigned long *)__get_SP(); \ asm volatile("mfmsr %0" : "=r" ((regs)->msr)); \ |