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Commit 143d34a6 authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf intel-pt: Add XMM registers to synthesized PEBS sample 



Add XMM register information from PEBS data in the Intel PT trace to the
synthesized PEBS sample.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190610072803.10456-9-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 9e9a618a

tools/perf/util/intel-pt.c

+29 −1
Original line number Diff line number Diff line
@@ -1603,6 +1603,31 @@ static u64 *intel_pt_add_gp_regs(struct regs_dump *intr_regs, u64 *pos, 
	return pos;

}



#ifndef PERF_REG_X86_XMM0

#define PERF_REG_X86_XMM0 32

#endif



static void intel_pt_add_xmm(struct regs_dump *intr_regs, u64 *pos,

			     const struct intel_pt_blk_items *items,

			     u64 regs_mask)

{

	u32 mask = items->has_xmm & (regs_mask >> PERF_REG_X86_XMM0);

	const u64 *xmm = items->xmm;



	/*

	 * If there are any XMM registers, then there should be all of them.

	 * Nevertheless, follow the logic to add only registers that were

	 * requested (i.e. 'regs_mask') and that were provided (i.e. 'mask'),

	 * and update the resulting mask (i.e. 'intr_regs->mask') accordingly.

	 */

	intr_regs->mask |= (u64)mask << PERF_REG_X86_XMM0;



	for (; mask; mask >>= 1, xmm++) {

		if (mask & 1)

			*pos++ = *xmm;

	}

}



static int intel_pt_synth_pebs_sample(struct intel_pt_queue *ptq)

{

	const struct intel_pt_blk_items *items = &ptq->state->items;
@@ -1657,13 +1682,16 @@ static int intel_pt_synth_pebs_sample(struct intel_pt_queue *ptq) 
	    items->mask[INTEL_PT_GP_REGS_POS]) {

		u64 regs[sizeof(sample.intr_regs.mask)];

		u64 regs_mask = evsel->attr.sample_regs_intr;

		u64 *pos;



		sample.intr_regs.abi = items->is_32_bit ?

				       PERF_SAMPLE_REGS_ABI_32 :

				       PERF_SAMPLE_REGS_ABI_64;

		sample.intr_regs.regs = regs;



		intel_pt_add_gp_regs(&sample.intr_regs, regs, items, regs_mask);

		pos = intel_pt_add_gp_regs(&sample.intr_regs, regs, items, regs_mask);



		intel_pt_add_xmm(&sample.intr_regs, pos, items, regs_mask);

	}



	return intel_pt_deliver_synth_event(pt, ptq, event, &sample, sample_type);