On Tue, Sep 23, 2014 at 04:57:45PM +0200, Stephane Eranian wrote:
> PEBS can capture machine state regs at retiremnt of the sampled
> instructions. When precise sampling is enabled on an event, PEBS
> is used, so substitute the interrupted state with the PEBS state.
> Note that not all registers are captured by PEBS. Those missing
> are replaced by the interrupt state counter-parts.
>
> Signed-off-by: Stephane Eranian <eran...@google.com>
> ---
> arch/x86/kernel/cpu/perf_event_intel_ds.c | 22 ++++++++++++++++++++++
> 1 file changed, 22 insertions(+)
>
> diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c
> b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> index b1553d0..0318023 100644
> --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
> +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> @@ -886,6 +886,28 @@ static void __intel_pmu_pebs_event(struct perf_event
> *event,
> regs.bp = pebs->bp;
> regs.sp = pebs->sp;
>
> + if (sample_type & PERF_SAMPLE_REGS_INTR) {
> + regs.ax = pebs->ax;
> + regs.bx = pebs->bx;
> + regs.cx = pebs->cx;
> + regs.dx = pebs->dx;
> + regs.si = pebs->si;
> + regs.di = pebs->di;
> + regs.sp = pebs->sp;
> + regs.bp = pebs->bp;
> +
> + regs.eflags = pebs->flags;
> +
> + regs.r8 = pebs->r8;
> + regs.r9 = pebs->r9;
> + regs.r10 = pebs->r10;
> + regs.r11 = pebs->r11;
> + regs.r12 = pebs->r12;
> + regs.r13 = pebs->r13;
> + regs.r14 = pebs->r14;
> + regs.r15 = pebs->r15;
> + }
You also lost the x86_32 compile fix I send earlier.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
