Commit 7105311c authored by Rob Herring's avatar Rob Herring Committed by Arnaldo Carvalho de Melo
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perf arm-spe: Add raw decoding for SPEv1.2 previous branch address 



Arm SPEv1.2 adds a new optional address packet type: previous branch
target. The recorded address is the target virtual address of the most
recently taken branch in program order.

Add support for decoding the address packet in raw dumps.

Reviewed-by: default avatarLeo Yan <leo.yan@linaro.org>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230203162401.132931-1-robh@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent b777b3d2

tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c

+3 −1
Original line number Diff line number Diff line
@@ -422,16 +422,18 @@ static int arm_spe_pkt_desc_addr(const struct arm_spe_pkt *packet, 
	int ch, pat;

	u64 payload = packet->payload;

	int err = 0;

	static const char *idx_name[] = {"PC", "TGT", "VA", "PA", "PBT"};



	switch (idx) {

	case SPE_ADDR_PKT_HDR_INDEX_INS:

	case SPE_ADDR_PKT_HDR_INDEX_BRANCH:

	case SPE_ADDR_PKT_HDR_INDEX_PREV_BRANCH:

		ns = !!SPE_ADDR_PKT_GET_NS(payload);

		el = SPE_ADDR_PKT_GET_EL(payload);

		payload = SPE_ADDR_PKT_ADDR_GET_BYTES_0_6(payload);

		arm_spe_pkt_out_string(&err, &buf, &buf_len,

				"%s 0x%llx el%d ns=%d",

				(idx == 1) ? "TGT" : "PC", payload, el, ns);

				idx_name[idx], payload, el, ns);

		break;

	case SPE_ADDR_PKT_HDR_INDEX_DATA_VIRT:

		arm_spe_pkt_out_string(&err, &buf, &buf_len,

tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h

+1 −0
Original line number Diff line number Diff line
@@ -65,6 +65,7 @@ struct arm_spe_pkt { 
#define SPE_ADDR_PKT_HDR_INDEX_BRANCH		0x1

#define SPE_ADDR_PKT_HDR_INDEX_DATA_VIRT	0x2

#define SPE_ADDR_PKT_HDR_INDEX_DATA_PHYS	0x3

#define SPE_ADDR_PKT_HDR_INDEX_PREV_BRANCH	0x4



/* Address packet payload */

#define SPE_ADDR_PKT_ADDR_BYTE7_SHIFT		56