Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 535 insertions, 0 deletions

diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
new file mode 100644
index 000000000..2f311189c
--- /dev/null
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -0,0 +1,535 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Arm Statistical Profiling Extensions (SPE) support
+ * Copyright (c) 2017-2018, Arm Ltd.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <endian.h>
+#include <byteswap.h>
+#include <linux/bitops.h>
+#include <stdarg.h>
+
+#include "arm-spe-pkt-decoder.h"
+
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#define le16_to_cpu bswap_16
+#define le32_to_cpu bswap_32
+#define le64_to_cpu bswap_64
+#define memcpy_le64(d, s, n) do { \
+	memcpy((d), (s), (n));    \
+	*(d) = le64_to_cpu(*(d)); \
+} while (0)
+#else
+#define le16_to_cpu
+#define le32_to_cpu
+#define le64_to_cpu
+#define memcpy_le64 memcpy
+#endif
+
+static const char * const arm_spe_packet_name[] = {
+	[ARM_SPE_PAD]		= "PAD",
+	[ARM_SPE_END]		= "END",
+	[ARM_SPE_TIMESTAMP]	= "TS",
+	[ARM_SPE_ADDRESS]	= "ADDR",
+	[ARM_SPE_COUNTER]	= "LAT",
+	[ARM_SPE_CONTEXT]	= "CONTEXT",
+	[ARM_SPE_OP_TYPE]	= "OP-TYPE",
+	[ARM_SPE_EVENTS]	= "EVENTS",
+	[ARM_SPE_DATA_SOURCE]	= "DATA-SOURCE",
+};
+
+const char *arm_spe_pkt_name(enum arm_spe_pkt_type type)
+{
+	return arm_spe_packet_name[type];
+}
+
+/*
+ * Extracts the field "sz" from header bits and converts to bytes:
+ *   00 : byte (1)
+ *   01 : halfword (2)
+ *   10 : word (4)
+ *   11 : doubleword (8)
+ */
+static unsigned int arm_spe_payload_len(unsigned char hdr)
+{
+	return 1U << ((hdr & GENMASK_ULL(5, 4)) >> 4);
+}
+
+static int arm_spe_get_payload(const unsigned char *buf, size_t len,
+			       unsigned char ext_hdr,
+			       struct arm_spe_pkt *packet)
+{
+	size_t payload_len = arm_spe_payload_len(buf[ext_hdr]);
+
+	if (len < 1 + ext_hdr + payload_len)
+		return ARM_SPE_NEED_MORE_BYTES;
+
+	buf += 1 + ext_hdr;
+
+	switch (payload_len) {
+	case 1: packet->payload = *(uint8_t *)buf; break;
+	case 2: packet->payload = le16_to_cpu(*(uint16_t *)buf); break;
+	case 4: packet->payload = le32_to_cpu(*(uint32_t *)buf); break;
+	case 8: packet->payload = le64_to_cpu(*(uint64_t *)buf); break;
+	default: return ARM_SPE_BAD_PACKET;
+	}
+
+	return 1 + ext_hdr + payload_len;
+}
+
+static int arm_spe_get_pad(struct arm_spe_pkt *packet)
+{
+	packet->type = ARM_SPE_PAD;
+	return 1;
+}
+
+static int arm_spe_get_alignment(const unsigned char *buf, size_t len,
+				 struct arm_spe_pkt *packet)
+{
+	unsigned int alignment = 1 << ((buf[0] & 0xf) + 1);
+
+	if (len < alignment)
+		return ARM_SPE_NEED_MORE_BYTES;
+
+	packet->type = ARM_SPE_PAD;
+	return alignment - (((uintptr_t)buf) & (alignment - 1));
+}
+
+static int arm_spe_get_end(struct arm_spe_pkt *packet)
+{
+	packet->type = ARM_SPE_END;
+	return 1;
+}
+
+static int arm_spe_get_timestamp(const unsigned char *buf, size_t len,
+				 struct arm_spe_pkt *packet)
+{
+	packet->type = ARM_SPE_TIMESTAMP;
+	return arm_spe_get_payload(buf, len, 0, packet);
+}
+
+static int arm_spe_get_events(const unsigned char *buf, size_t len,
+			      struct arm_spe_pkt *packet)
+{
+	packet->type = ARM_SPE_EVENTS;
+
+	/* we use index to identify Events with a less number of
+	 * comparisons in arm_spe_pkt_desc(): E.g., the LLC-ACCESS,
+	 * LLC-REFILL, and REMOTE-ACCESS events are identified if
+	 * index > 1.
+	 */
+	packet->index = arm_spe_payload_len(buf[0]);
+
+	return arm_spe_get_payload(buf, len, 0, packet);
+}
+
+static int arm_spe_get_data_source(const unsigned char *buf, size_t len,
+				   struct arm_spe_pkt *packet)
+{
+	packet->type = ARM_SPE_DATA_SOURCE;
+	return arm_spe_get_payload(buf, len, 0, packet);
+}
+
+static int arm_spe_get_context(const unsigned char *buf, size_t len,
+			       struct arm_spe_pkt *packet)
+{
+	packet->type = ARM_SPE_CONTEXT;
+	packet->index = SPE_CTX_PKT_HDR_INDEX(buf[0]);
+	return arm_spe_get_payload(buf, len, 0, packet);
+}
+
+static int arm_spe_get_op_type(const unsigned char *buf, size_t len,
+			       struct arm_spe_pkt *packet)
+{
+	packet->type = ARM_SPE_OP_TYPE;
+	packet->index = SPE_OP_PKT_HDR_CLASS(buf[0]);
+	return arm_spe_get_payload(buf, len, 0, packet);
+}
+
+static int arm_spe_get_counter(const unsigned char *buf, size_t len,
+			       const unsigned char ext_hdr, struct arm_spe_pkt *packet)
+{
+	packet->type = ARM_SPE_COUNTER;
+
+	if (ext_hdr)
+		packet->index = SPE_HDR_EXTENDED_INDEX(buf[0], buf[1]);
+	else
+		packet->index = SPE_HDR_SHORT_INDEX(buf[0]);
+
+	return arm_spe_get_payload(buf, len, ext_hdr, packet);
+}
+
+static int arm_spe_get_addr(const unsigned char *buf, size_t len,
+			    const unsigned char ext_hdr, struct arm_spe_pkt *packet)
+{
+	packet->type = ARM_SPE_ADDRESS;
+
+	if (ext_hdr)
+		packet->index = SPE_HDR_EXTENDED_INDEX(buf[0], buf[1]);
+	else
+		packet->index = SPE_HDR_SHORT_INDEX(buf[0]);
+
+	return arm_spe_get_payload(buf, len, ext_hdr, packet);
+}
+
+static int arm_spe_do_get_packet(const unsigned char *buf, size_t len,
+				 struct arm_spe_pkt *packet)
+{
+	unsigned int hdr;
+	unsigned char ext_hdr = 0;
+
+	memset(packet, 0, sizeof(struct arm_spe_pkt));
+
+	if (!len)
+		return ARM_SPE_NEED_MORE_BYTES;
+
+	hdr = buf[0];
+
+	if (hdr == SPE_HEADER0_PAD)
+		return arm_spe_get_pad(packet);
+
+	if (hdr == SPE_HEADER0_END) /* no timestamp at end of record */
+		return arm_spe_get_end(packet);
+
+	if (hdr == SPE_HEADER0_TIMESTAMP)
+		return arm_spe_get_timestamp(buf, len, packet);
+
+	if ((hdr & SPE_HEADER0_MASK1) == SPE_HEADER0_EVENTS)
+		return arm_spe_get_events(buf, len, packet);
+
+	if ((hdr & SPE_HEADER0_MASK1) == SPE_HEADER0_SOURCE)
+		return arm_spe_get_data_source(buf, len, packet);
+
+	if ((hdr & SPE_HEADER0_MASK2) == SPE_HEADER0_CONTEXT)
+		return arm_spe_get_context(buf, len, packet);
+
+	if ((hdr & SPE_HEADER0_MASK2) == SPE_HEADER0_OP_TYPE)
+		return arm_spe_get_op_type(buf, len, packet);
+
+	if ((hdr & SPE_HEADER0_MASK2) == SPE_HEADER0_EXTENDED) {
+		/* 16-bit extended format header */
+		if (len == 1)
+			return ARM_SPE_BAD_PACKET;
+
+		ext_hdr = 1;
+		hdr = buf[1];
+		if (hdr == SPE_HEADER1_ALIGNMENT)
+			return arm_spe_get_alignment(buf, len, packet);
+	}
+
+	/*
+	 * The short format header's byte 0 or the extended format header's
+	 * byte 1 has been assigned to 'hdr', which uses the same encoding for
+	 * address packet and counter packet, so don't need to distinguish if
+	 * it's short format or extended format and handle in once.
+	 */
+	if ((hdr & SPE_HEADER0_MASK3) == SPE_HEADER0_ADDRESS)
+		return arm_spe_get_addr(buf, len, ext_hdr, packet);
+
+	if ((hdr & SPE_HEADER0_MASK3) == SPE_HEADER0_COUNTER)
+		return arm_spe_get_counter(buf, len, ext_hdr, packet);
+
+	return ARM_SPE_BAD_PACKET;
+}
+
+int arm_spe_get_packet(const unsigned char *buf, size_t len,
+		       struct arm_spe_pkt *packet)
+{
+	int ret;
+
+	ret = arm_spe_do_get_packet(buf, len, packet);
+	/* put multiple consecutive PADs on the same line, up to
+	 * the fixed-width output format of 16 bytes per line.
+	 */
+	if (ret > 0 && packet->type == ARM_SPE_PAD) {
+		while (ret < 16 && len > (size_t)ret && !buf[ret])
+			ret += 1;
+	}
+	return ret;
+}
+
+static int arm_spe_pkt_out_string(int *err, char **buf_p, size_t *blen,
+				  const char *fmt, ...)
+{
+	va_list ap;
+	int ret;
+
+	/* Bail out if any error occurred */
+	if (err && *err)
+		return *err;
+
+	va_start(ap, fmt);
+	ret = vsnprintf(*buf_p, *blen, fmt, ap);
+	va_end(ap);
+
+	if (ret < 0) {
+		if (err && !*err)
+			*err = ret;
+
+	/*
+	 * A return value of *blen or more means that the output was
+	 * truncated and the buffer is overrun.
+	 */
+	} else if ((size_t)ret >= *blen) {
+		(*buf_p)[*blen - 1] = '\0';
+
+		/*
+		 * Set *err to 'ret' to avoid overflow if tries to
+		 * fill this buffer sequentially.
+		 */
+		if (err && !*err)
+			*err = ret;
+	} else {
+		*buf_p += ret;
+		*blen -= ret;
+	}
+
+	return ret;
+}
+
+static int arm_spe_pkt_desc_event(const struct arm_spe_pkt *packet,
+				  char *buf, size_t buf_len)
+{
+	u64 payload = packet->payload;
+	int err = 0;
+
+	arm_spe_pkt_out_string(&err, &buf, &buf_len, "EV");
+
+	if (payload & BIT(EV_EXCEPTION_GEN))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " EXCEPTION-GEN");
+	if (payload & BIT(EV_RETIRED))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " RETIRED");
+	if (payload & BIT(EV_L1D_ACCESS))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " L1D-ACCESS");
+	if (payload & BIT(EV_L1D_REFILL))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " L1D-REFILL");
+	if (payload & BIT(EV_TLB_ACCESS))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " TLB-ACCESS");
+	if (payload & BIT(EV_TLB_WALK))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " TLB-REFILL");
+	if (payload & BIT(EV_NOT_TAKEN))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " NOT-TAKEN");
+	if (payload & BIT(EV_MISPRED))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " MISPRED");
+	if (payload & BIT(EV_LLC_ACCESS))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " LLC-ACCESS");
+	if (payload & BIT(EV_LLC_MISS))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " LLC-REFILL");
+	if (payload & BIT(EV_REMOTE_ACCESS))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " REMOTE-ACCESS");
+	if (payload & BIT(EV_ALIGNMENT))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " ALIGNMENT");
+	if (payload & BIT(EV_PARTIAL_PREDICATE))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " SVE-PARTIAL-PRED");
+	if (payload & BIT(EV_EMPTY_PREDICATE))
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, " SVE-EMPTY-PRED");
+
+	return err;
+}
+
+static int arm_spe_pkt_desc_op_type(const struct arm_spe_pkt *packet,
+				    char *buf, size_t buf_len)
+{
+	u64 payload = packet->payload;
+	int err = 0;
+
+	switch (packet->index) {
+	case SPE_OP_PKT_HDR_CLASS_OTHER:
+		if (SPE_OP_PKT_IS_OTHER_SVE_OP(payload)) {
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, "SVE-OTHER");
+
+			/* SVE effective vector length */
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, " EVLEN %d",
+					       SPE_OP_PKG_SVE_EVL(payload));
+
+			if (payload & SPE_OP_PKT_SVE_FP)
+				arm_spe_pkt_out_string(&err, &buf, &buf_len, " FP");
+			if (payload & SPE_OP_PKT_SVE_PRED)
+				arm_spe_pkt_out_string(&err, &buf, &buf_len, " PRED");
+		} else {
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, "OTHER");
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, " %s",
+					       payload & SPE_OP_PKT_COND ?
+					       "COND-SELECT" : "INSN-OTHER");
+		}
+		break;
+	case SPE_OP_PKT_HDR_CLASS_LD_ST_ATOMIC:
+		arm_spe_pkt_out_string(&err, &buf, &buf_len,
+				       payload & 0x1 ? "ST" : "LD");
+
+		if (SPE_OP_PKT_IS_LDST_ATOMIC(payload)) {
+			if (payload & SPE_OP_PKT_AT)
+				arm_spe_pkt_out_string(&err, &buf, &buf_len, " AT");
+			if (payload & SPE_OP_PKT_EXCL)
+				arm_spe_pkt_out_string(&err, &buf, &buf_len, " EXCL");
+			if (payload & SPE_OP_PKT_AR)
+				arm_spe_pkt_out_string(&err, &buf, &buf_len, " AR");
+		}
+
+		switch (SPE_OP_PKT_LDST_SUBCLASS_GET(payload)) {
+		case SPE_OP_PKT_LDST_SUBCLASS_SIMD_FP:
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, " SIMD-FP");
+			break;
+		case SPE_OP_PKT_LDST_SUBCLASS_GP_REG:
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, " GP-REG");
+			break;
+		case SPE_OP_PKT_LDST_SUBCLASS_UNSPEC_REG:
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, " UNSPEC-REG");
+			break;
+		case SPE_OP_PKT_LDST_SUBCLASS_NV_SYSREG:
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, " NV-SYSREG");
+			break;
+		default:
+			break;
+		}
+
+		if (SPE_OP_PKT_IS_LDST_SVE(payload)) {
+			/* SVE effective vector length */
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, " EVLEN %d",
+					       SPE_OP_PKG_SVE_EVL(payload));
+
+			if (payload & SPE_OP_PKT_SVE_PRED)
+				arm_spe_pkt_out_string(&err, &buf, &buf_len, " PRED");
+			if (payload & SPE_OP_PKT_SVE_SG)
+				arm_spe_pkt_out_string(&err, &buf, &buf_len, " SG");
+		}
+		break;
+	case SPE_OP_PKT_HDR_CLASS_BR_ERET:
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, "B");
+
+		if (payload & SPE_OP_PKT_COND)
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, " COND");
+
+		if (SPE_OP_PKT_IS_INDIRECT_BRANCH(payload))
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, " IND");
+
+		break;
+	default:
+		/* Unknown index */
+		err = -1;
+		break;
+	}
+
+	return err;
+}
+
+static int arm_spe_pkt_desc_addr(const struct arm_spe_pkt *packet,
+				 char *buf, size_t buf_len)
+{
+	int ns, el, idx = packet->index;
+	int ch, pat;
+	u64 payload = packet->payload;
+	int err = 0;
+
+	switch (idx) {
+	case SPE_ADDR_PKT_HDR_INDEX_INS:
+	case SPE_ADDR_PKT_HDR_INDEX_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);
+		break;
+	case SPE_ADDR_PKT_HDR_INDEX_DATA_VIRT:
+		arm_spe_pkt_out_string(&err, &buf, &buf_len,
+				       "VA 0x%llx", payload);
+		break;
+	case SPE_ADDR_PKT_HDR_INDEX_DATA_PHYS:
+		ns = !!SPE_ADDR_PKT_GET_NS(payload);
+		ch = !!SPE_ADDR_PKT_GET_CH(payload);
+		pat = SPE_ADDR_PKT_GET_PAT(payload);
+		payload = SPE_ADDR_PKT_ADDR_GET_BYTES_0_6(payload);
+		arm_spe_pkt_out_string(&err, &buf, &buf_len,
+				       "PA 0x%llx ns=%d ch=%d pat=%x",
+				       payload, ns, ch, pat);
+		break;
+	default:
+		/* Unknown index */
+		err = -1;
+		break;
+	}
+
+	return err;
+}
+
+static int arm_spe_pkt_desc_counter(const struct arm_spe_pkt *packet,
+				    char *buf, size_t buf_len)
+{
+	u64 payload = packet->payload;
+	const char *name = arm_spe_pkt_name(packet->type);
+	int err = 0;
+
+	arm_spe_pkt_out_string(&err, &buf, &buf_len, "%s %d ", name,
+			       (unsigned short)payload);
+
+	switch (packet->index) {
+	case SPE_CNT_PKT_HDR_INDEX_TOTAL_LAT:
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, "TOT");
+		break;
+	case SPE_CNT_PKT_HDR_INDEX_ISSUE_LAT:
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, "ISSUE");
+		break;
+	case SPE_CNT_PKT_HDR_INDEX_TRANS_LAT:
+		arm_spe_pkt_out_string(&err, &buf, &buf_len, "XLAT");
+		break;
+	default:
+		break;
+	}
+
+	return err;
+}
+
+int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
+		     size_t buf_len)
+{
+	int idx = packet->index;
+	unsigned long long payload = packet->payload;
+	const char *name = arm_spe_pkt_name(packet->type);
+	char *buf_orig = buf;
+	size_t blen = buf_len;
+	int err = 0;
+
+	switch (packet->type) {
+	case ARM_SPE_BAD:
+	case ARM_SPE_PAD:
+	case ARM_SPE_END:
+		arm_spe_pkt_out_string(&err, &buf, &blen, "%s", name);
+		break;
+	case ARM_SPE_EVENTS:
+		err = arm_spe_pkt_desc_event(packet, buf, buf_len);
+		break;
+	case ARM_SPE_OP_TYPE:
+		err = arm_spe_pkt_desc_op_type(packet, buf, buf_len);
+		break;
+	case ARM_SPE_DATA_SOURCE:
+	case ARM_SPE_TIMESTAMP:
+		arm_spe_pkt_out_string(&err, &buf, &blen, "%s %lld", name, payload);
+		break;
+	case ARM_SPE_ADDRESS:
+		err = arm_spe_pkt_desc_addr(packet, buf, buf_len);
+		break;
+	case ARM_SPE_CONTEXT:
+		arm_spe_pkt_out_string(&err, &buf, &blen, "%s 0x%lx el%d",
+				       name, (unsigned long)payload, idx + 1);
+		break;
+	case ARM_SPE_COUNTER:
+		err = arm_spe_pkt_desc_counter(packet, buf, buf_len);
+		break;
+	default:
+		/* Unknown packet type */
+		err = -1;
+		break;
+	}
+
+	/* Output raw data if detect any error */
+	if (err) {
+		err = 0;
+		arm_spe_pkt_out_string(&err, &buf_orig, &buf_len, "%s 0x%llx (%d)",
+				       name, payload, packet->index);
+	}
+
+	return err;
+}