This is patch set v9 for refactoring Arm SPE trace decoding and dumping.
According to comments and suggestions from patch set v8, it squashs the
two patches into single one: "perf arm-spe: Refactor printing string to
buffer" and "perf arm-spe: Consolidate arm_spe_pkt_desc()'s return
value".
In the patch 01/16, it renames the function arm_spe_pkt_snprintf() to
arm_spe_pkt_out_string(), since the function is not the same semantics
with snprintf(), the renaming can avoid confusion.
This patch set is cleanly applied on the top of perf/core branch
with commit 29396cd573da ("perf expr: Force encapsulation on
expr_id_data").
This patch set has been tested on Hisilicon D06 platform with commands
"perf report -D" and "perf script", compared the decoding results
between with this patch set and without this patch set, "diff" tool
shows the result as expected.
I also manually built the patches for arm/arm64/x86_64 and verfied
every single patch can build successfully.
Changes from v8:
- Squashed the two patches "perf arm-spe: Refactor printing string to
buffer" and "perf arm-spe: Consolidate arm_spe_pkt_desc()'s return
value" (Dave);
- Fixed the condition for vsnprintf()'s overrun to
"if ((size_t)ret >= *blen)" (Dave);
- Renamed function arm_spe_pkt_snprintf() to arm_spe_pkt_out_string()
(Dave/Arnaldo);
- Rebased on the latest perf/core branch.
Changes from v7:
- Changed to pass '&buf_len' for the last call arm_spe_pkt_snprintf() in
the patch 07/22 (Andre).
Changes from v6:
- Removed the redundant comma from the string in the patch 21/22 "perf
arm_spe: Decode memory tagging properties" (Dave);
- Refined the return value for arm_spe_pkt_desc(): returns 0 for
success, otherwise returns non zero for failures; handle error code at
the end of function arm_spe_pkt_desc(); this is accomplished in the
new patch 07/22 "perf arm-spe: Consolidate arm_spe_pkt_desc()'s
return value" (Dave).
Andre Przywara (1):
perf arm_spe: Decode memory tagging properties
Leo Yan (14):
perf arm-spe: Refactor printing string to buffer
perf arm-spe: Refactor packet header parsing
perf arm-spe: Add new function arm_spe_pkt_desc_addr()
perf arm-spe: Refactor address packet handling
perf arm_spe: Fixup top byte for data virtual address
perf arm-spe: Refactor context packet handling
perf arm-spe: Add new function arm_spe_pkt_desc_counter()
perf arm-spe: Refactor counter packet handling
perf arm-spe: Add new function arm_spe_pkt_desc_event()
perf arm-spe: Refactor event type handling
perf arm-spe: Remove size condition checking for events
perf arm-spe: Add new function arm_spe_pkt_desc_op_type()
perf arm-spe: Refactor operation packet handling
perf arm-spe: Add more sub classes for operation packet
Wei Li (1):
perf arm-spe: Add support for ARMv8.3-SPE
.../util/arm-spe-decoder/arm-spe-decoder.c | 54 +-
.../util/arm-spe-decoder/arm-spe-decoder.h | 17 -
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 542 ++++++++++--------
.../arm-spe-decoder/arm-spe-pkt-decoder.h | 122 +++-
tools/perf/util/arm-spe.c | 2 +-
5 files changed, 455 insertions(+), 282 deletions(-)
--
2.17.1
This patch defines macros for counter packet header, and uses macros to
replace hard code values in functions arm_spe_get_counter() and
arm_spe_pkt_desc().
In the function arm_spe_get_counter(), adds a new line for more
readable.
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c | 11 ++++++-----
tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h | 5 +++++
2 files changed, 11 insertions(+), 5 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
index 397ade5ffdeb..52f4339b1f0c 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -152,10 +152,11 @@ 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 = ((buf[0] & 0x3) << 3) | (buf[1] & 0x7);
+ packet->index = SPE_HDR_EXTENDED_INDEX(buf[0], buf[1]);
else
- packet->index = buf[0] & 0x7;
+ packet->index = SPE_HDR_SHORT_INDEX(buf[0]);
return arm_spe_get_payload(buf, len, ext_hdr, packet);
}
@@ -333,13 +334,13 @@ static int arm_spe_pkt_desc_counter(const struct arm_spe_pkt *packet,
(unsigned short)payload);
switch (packet->index) {
- case 0:
+ case SPE_CNT_PKT_HDR_INDEX_TOTAL_LAT:
arm_spe_pkt_out_string(&err, &buf, &buf_len, "TOT");
break;
- case 1:
+ case SPE_CNT_PKT_HDR_INDEX_ISSUE_LAT:
arm_spe_pkt_out_string(&err, &buf, &buf_len, "ISSUE");
break;
- case 2:
+ case SPE_CNT_PKT_HDR_INDEX_TRANS_LAT:
arm_spe_pkt_out_string(&err, &buf, &buf_len, "XLAT");
break;
default:
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
index 9bc876bffd35..7d8e34e35f05 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
@@ -82,6 +82,11 @@ struct arm_spe_pkt {
/* Context packet header */
#define SPE_CTX_PKT_HDR_INDEX(h) ((h) & GENMASK_ULL(1, 0))
+/* Counter packet header */
+#define SPE_CNT_PKT_HDR_INDEX_TOTAL_LAT 0x0
+#define SPE_CNT_PKT_HDR_INDEX_ISSUE_LAT 0x1
+#define SPE_CNT_PKT_HDR_INDEX_TRANS_LAT 0x2
+
const char *arm_spe_pkt_name(enum arm_spe_pkt_type);
int arm_spe_get_packet(const unsigned char *buf, size_t len,
--
2.17.1
When outputs strings to the decoding buffer with function snprintf(),
SPE decoder needs to detects if any error returns from snprintf() and if
so needs to directly bail out. If snprintf() returns success, it needs
to update buffer pointer and reduce the buffer length so can continue to
output the next string into the consequent memory space.
This complex logics are spreading in the function arm_spe_pkt_desc() so
there has many duplicate codes for handling error detecting, increment
buffer pointer and decrement buffer size.
To avoid the duplicate code, this patch introduces a new helper function
arm_spe_pkt_out_string() which is used to wrap up the complex logics,
and it's used by the caller arm_spe_pkt_desc(). This patch moves the
variable 'blen' as the function's local variable so allows to remove
the unnecessary braces and improve the readability.
This patch simplifies the return value for arm_spe_pkt_desc(): '0' means
success and other values mean an error has occurred. To realize this,
it relies on arm_spe_pkt_out_string()'s parameter 'err', the 'err' is a
cumulative value, returns its final value if printing buffer is called
for one time or multiple times. Finally, the error is handled in a
central place, rather than directly bailing out in switch-cases, it
returns error at the end of arm_spe_pkt_desc().
This patch changes the caller arm_spe_dump() to respect the updated
return value semantics of arm_spe_pkt_desc().
Suggested-by: Dave Martin <[email protected]>
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
Reviewed-by: Dave Martin <[email protected]>
---
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 302 +++++++++---------
tools/perf/util/arm-spe.c | 2 +-
2 files changed, 151 insertions(+), 153 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
index 671a4763fb47..fbededc1bcd4 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -9,6 +9,7 @@
#include <endian.h>
#include <byteswap.h>
#include <linux/bitops.h>
+#include <stdarg.h>
#include "arm-spe-pkt-decoder.h"
@@ -258,192 +259,189 @@ int arm_spe_get_packet(const unsigned char *buf, size_t len,
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;
+}
+
int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
size_t buf_len)
{
- int ret, ns, el, idx = packet->index;
+ int ns, el, 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:
- return snprintf(buf, buf_len, "%s", name);
- case ARM_SPE_EVENTS: {
- size_t blen = buf_len;
-
- ret = 0;
- ret = snprintf(buf, buf_len, "EV");
- buf += ret;
- blen -= ret;
- if (payload & 0x1) {
- ret = snprintf(buf, buf_len, " EXCEPTION-GEN");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x2) {
- ret = snprintf(buf, buf_len, " RETIRED");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x4) {
- ret = snprintf(buf, buf_len, " L1D-ACCESS");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x8) {
- ret = snprintf(buf, buf_len, " L1D-REFILL");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x10) {
- ret = snprintf(buf, buf_len, " TLB-ACCESS");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x20) {
- ret = snprintf(buf, buf_len, " TLB-REFILL");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x40) {
- ret = snprintf(buf, buf_len, " NOT-TAKEN");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x80) {
- ret = snprintf(buf, buf_len, " MISPRED");
- buf += ret;
- blen -= ret;
- }
+ arm_spe_pkt_out_string(&err, &buf, &blen, "%s", name);
+ break;
+ case ARM_SPE_EVENTS:
+ arm_spe_pkt_out_string(&err, &buf, &blen, "EV");
+
+ if (payload & 0x1)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " EXCEPTION-GEN");
+ if (payload & 0x2)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " RETIRED");
+ if (payload & 0x4)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " L1D-ACCESS");
+ if (payload & 0x8)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " L1D-REFILL");
+ if (payload & 0x10)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " TLB-ACCESS");
+ if (payload & 0x20)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " TLB-REFILL");
+ if (payload & 0x40)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " NOT-TAKEN");
+ if (payload & 0x80)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " MISPRED");
if (idx > 1) {
- if (payload & 0x100) {
- ret = snprintf(buf, buf_len, " LLC-ACCESS");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x200) {
- ret = snprintf(buf, buf_len, " LLC-REFILL");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x400) {
- ret = snprintf(buf, buf_len, " REMOTE-ACCESS");
- buf += ret;
- blen -= ret;
- }
+ if (payload & 0x100)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " LLC-ACCESS");
+ if (payload & 0x200)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " LLC-REFILL");
+ if (payload & 0x400)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " REMOTE-ACCESS");
}
- if (ret < 0)
- return ret;
- blen -= ret;
- return buf_len - blen;
- }
+ break;
case ARM_SPE_OP_TYPE:
switch (idx) {
- case 0: return snprintf(buf, buf_len, "%s", payload & 0x1 ?
- "COND-SELECT" : "INSN-OTHER");
- case 1: {
- size_t blen = buf_len;
+ case 0:
+ arm_spe_pkt_out_string(&err, &buf, &blen,
+ payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
+ break;
+ case 1:
+ arm_spe_pkt_out_string(&err, &buf, &blen,
+ payload & 0x1 ? "ST" : "LD");
- if (payload & 0x1)
- ret = snprintf(buf, buf_len, "ST");
- else
- ret = snprintf(buf, buf_len, "LD");
- buf += ret;
- blen -= ret;
if (payload & 0x2) {
- if (payload & 0x4) {
- ret = snprintf(buf, buf_len, " AT");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x8) {
- ret = snprintf(buf, buf_len, " EXCL");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x10) {
- ret = snprintf(buf, buf_len, " AR");
- buf += ret;
- blen -= ret;
- }
+ if (payload & 0x4)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " AT");
+ if (payload & 0x8)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " EXCL");
+ if (payload & 0x10)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " AR");
} else if (payload & 0x4) {
- ret = snprintf(buf, buf_len, " SIMD-FP");
- buf += ret;
- blen -= ret;
- }
- if (ret < 0)
- return ret;
- blen -= ret;
- return buf_len - blen;
- }
- case 2: {
- size_t blen = buf_len;
-
- ret = snprintf(buf, buf_len, "B");
- buf += ret;
- blen -= ret;
- if (payload & 0x1) {
- ret = snprintf(buf, buf_len, " COND");
- buf += ret;
- blen -= ret;
- }
- if (payload & 0x2) {
- ret = snprintf(buf, buf_len, " IND");
- buf += ret;
- blen -= ret;
- }
- if (ret < 0)
- return ret;
- blen -= ret;
- return buf_len - blen;
+ arm_spe_pkt_out_string(&err, &buf, &blen, " SIMD-FP");
}
- default: return 0;
+ break;
+ case 2:
+ arm_spe_pkt_out_string(&err, &buf, &blen, "B");
+
+ if (payload & 0x1)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " COND");
+ if (payload & 0x2)
+ arm_spe_pkt_out_string(&err, &buf, &blen, " IND");
+
+ break;
+ default:
+ /* Unknown index */
+ err = -1;
+ break;
}
+ break;
case ARM_SPE_DATA_SOURCE:
case ARM_SPE_TIMESTAMP:
- return snprintf(buf, buf_len, "%s %lld", name, payload);
+ arm_spe_pkt_out_string(&err, &buf, &blen, "%s %lld", name, payload);
+ break;
case ARM_SPE_ADDRESS:
switch (idx) {
case 0:
- case 1: ns = !!(packet->payload & NS_FLAG);
+ case 1:
+ ns = !!(packet->payload & NS_FLAG);
el = (packet->payload & EL_FLAG) >> 61;
payload &= ~(0xffULL << 56);
- return snprintf(buf, buf_len, "%s 0x%llx el%d ns=%d",
+ arm_spe_pkt_out_string(&err, &buf, &blen,
+ "%s 0x%llx el%d ns=%d",
(idx == 1) ? "TGT" : "PC", payload, el, ns);
- case 2: return snprintf(buf, buf_len, "VA 0x%llx", payload);
- case 3: ns = !!(packet->payload & NS_FLAG);
+ break;
+ case 2:
+ arm_spe_pkt_out_string(&err, &buf, &blen,
+ "VA 0x%llx", payload);
+ break;
+ case 3:
+ ns = !!(packet->payload & NS_FLAG);
payload &= ~(0xffULL << 56);
- return snprintf(buf, buf_len, "PA 0x%llx ns=%d",
- payload, ns);
- default: return 0;
+ arm_spe_pkt_out_string(&err, &buf, &blen,
+ "PA 0x%llx ns=%d", payload, ns);
+ break;
+ default:
+ /* Unknown index */
+ err = -1;
+ break;
}
+ break;
case ARM_SPE_CONTEXT:
- return snprintf(buf, buf_len, "%s 0x%lx el%d", name,
- (unsigned long)payload, idx + 1);
- case ARM_SPE_COUNTER: {
- size_t blen = buf_len;
-
- ret = snprintf(buf, buf_len, "%s %d ", name,
- (unsigned short)payload);
- buf += ret;
- blen -= ret;
+ arm_spe_pkt_out_string(&err, &buf, &blen, "%s 0x%lx el%d",
+ name, (unsigned long)payload, idx + 1);
+ break;
+ case ARM_SPE_COUNTER:
+ arm_spe_pkt_out_string(&err, &buf, &blen, "%s %d ", name,
+ (unsigned short)payload);
switch (idx) {
- case 0: ret = snprintf(buf, buf_len, "TOT"); break;
- case 1: ret = snprintf(buf, buf_len, "ISSUE"); break;
- case 2: ret = snprintf(buf, buf_len, "XLAT"); break;
- default: ret = 0;
+ case 0:
+ arm_spe_pkt_out_string(&err, &buf, &blen, "TOT");
+ break;
+ case 1:
+ arm_spe_pkt_out_string(&err, &buf, &blen, "ISSUE");
+ break;
+ case 2:
+ arm_spe_pkt_out_string(&err, &buf, &blen, "XLAT");
+ break;
+ default:
+ break;
}
- if (ret < 0)
- return ret;
- blen -= ret;
- return buf_len - blen;
- }
+ break;
default:
+ /* Unknown packet type */
+ err = -1;
break;
}
- return snprintf(buf, buf_len, "%s 0x%llx (%d)",
- name, payload, packet->index);
+ /* 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;
}
diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c
index 3882a5360ada..8901a1656a41 100644
--- a/tools/perf/util/arm-spe.c
+++ b/tools/perf/util/arm-spe.c
@@ -113,7 +113,7 @@ static void arm_spe_dump(struct arm_spe *spe __maybe_unused,
if (ret > 0) {
ret = arm_spe_pkt_desc(&packet, desc,
ARM_SPE_PKT_DESC_MAX);
- if (ret > 0)
+ if (!ret)
color_fprintf(stdout, color, " %s\n", desc);
} else {
color_fprintf(stdout, color, " Bad packet!\n");
--
2.17.1
The packet header parsing uses the hard coded values and it uses nested
if-else statements.
To improve the readability, this patch refactors the macros for packet
header format so it removes the hard coded values. Furthermore, based
on the new mask macros it reduces the nested if-else statements and
changes to use the flat conditions checking, this is directive and can
easily map to the descriptions in ARMv8-a architecture reference manual
(ARM DDI 0487E.a), chapter 'D10.1.5 Statistical Profiling Extension
protocol packet headers'.
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 92 +++++++++----------
.../arm-spe-decoder/arm-spe-pkt-decoder.h | 20 ++++
2 files changed, 61 insertions(+), 51 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
index fbededc1bcd4..a769fe5a4496 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -16,28 +16,6 @@
#define NS_FLAG BIT_ULL(63)
#define EL_FLAG (BIT_ULL(62) | BIT_ULL(61))
-#define SPE_HEADER0_PAD 0x0
-#define SPE_HEADER0_END 0x1
-#define SPE_HEADER0_ADDRESS 0x30 /* address packet (short) */
-#define SPE_HEADER0_ADDRESS_MASK 0x38
-#define SPE_HEADER0_COUNTER 0x18 /* counter packet (short) */
-#define SPE_HEADER0_COUNTER_MASK 0x38
-#define SPE_HEADER0_TIMESTAMP 0x71
-#define SPE_HEADER0_TIMESTAMP 0x71
-#define SPE_HEADER0_EVENTS 0x2
-#define SPE_HEADER0_EVENTS_MASK 0xf
-#define SPE_HEADER0_SOURCE 0x3
-#define SPE_HEADER0_SOURCE_MASK 0xf
-#define SPE_HEADER0_CONTEXT 0x24
-#define SPE_HEADER0_CONTEXT_MASK 0x3c
-#define SPE_HEADER0_OP_TYPE 0x8
-#define SPE_HEADER0_OP_TYPE_MASK 0x3c
-#define SPE_HEADER1_ALIGNMENT 0x0
-#define SPE_HEADER1_ADDRESS 0xb0 /* address packet (extended) */
-#define SPE_HEADER1_ADDRESS_MASK 0xf8
-#define SPE_HEADER1_COUNTER 0x98 /* counter packet (extended) */
-#define SPE_HEADER1_COUNTER_MASK 0xf8
-
#if __BYTE_ORDER == __BIG_ENDIAN
#define le16_to_cpu bswap_16
#define le32_to_cpu bswap_32
@@ -200,46 +178,58 @@ static int arm_spe_get_addr(const unsigned char *buf, size_t len,
static int arm_spe_do_get_packet(const unsigned char *buf, size_t len,
struct arm_spe_pkt *packet)
{
- unsigned int byte;
+ unsigned int hdr;
+ unsigned char ext_hdr = 0;
memset(packet, 0, sizeof(struct arm_spe_pkt));
if (!len)
return ARM_SPE_NEED_MORE_BYTES;
- byte = buf[0];
- if (byte == SPE_HEADER0_PAD)
+ hdr = buf[0];
+
+ if (hdr == SPE_HEADER0_PAD)
return arm_spe_get_pad(packet);
- else if (byte == SPE_HEADER0_END) /* no timestamp at end of record */
+
+ if (hdr == SPE_HEADER0_END) /* no timestamp at end of record */
return arm_spe_get_end(packet);
- else if (byte & 0xc0 /* 0y11xxxxxx */) {
- if (byte & 0x80) {
- if ((byte & SPE_HEADER0_ADDRESS_MASK) == SPE_HEADER0_ADDRESS)
- return arm_spe_get_addr(buf, len, 0, packet);
- if ((byte & SPE_HEADER0_COUNTER_MASK) == SPE_HEADER0_COUNTER)
- return arm_spe_get_counter(buf, len, 0, packet);
- } else
- if (byte == SPE_HEADER0_TIMESTAMP)
- return arm_spe_get_timestamp(buf, len, packet);
- else if ((byte & SPE_HEADER0_EVENTS_MASK) == SPE_HEADER0_EVENTS)
- return arm_spe_get_events(buf, len, packet);
- else if ((byte & SPE_HEADER0_SOURCE_MASK) == SPE_HEADER0_SOURCE)
- return arm_spe_get_data_source(buf, len, packet);
- else if ((byte & SPE_HEADER0_CONTEXT_MASK) == SPE_HEADER0_CONTEXT)
- return arm_spe_get_context(buf, len, packet);
- else if ((byte & SPE_HEADER0_OP_TYPE_MASK) == SPE_HEADER0_OP_TYPE)
- return arm_spe_get_op_type(buf, len, packet);
- } else if ((byte & 0xe0) == 0x20 /* 0y001xxxxx */) {
- /* 16-bit header */
- byte = buf[1];
- if (byte == SPE_HEADER1_ALIGNMENT)
+
+ 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 */
+ ext_hdr = 1;
+
+ hdr = buf[1];
+ if (hdr == SPE_HEADER1_ALIGNMENT)
return arm_spe_get_alignment(buf, len, packet);
- else if ((byte & SPE_HEADER1_ADDRESS_MASK) == SPE_HEADER1_ADDRESS)
- return arm_spe_get_addr(buf, len, 1, packet);
- else if ((byte & SPE_HEADER1_COUNTER_MASK) == SPE_HEADER1_COUNTER)
- return arm_spe_get_counter(buf, len, 1, 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;
}
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
index 4c870521b8eb..129f43405eb1 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
@@ -36,6 +36,26 @@ struct arm_spe_pkt {
uint64_t payload;
};
+/* Short header (HEADER0) and extended header (HEADER1) */
+#define SPE_HEADER0_PAD 0x0
+#define SPE_HEADER0_END 0x1
+#define SPE_HEADER0_TIMESTAMP 0x71
+/* Mask for event & data source */
+#define SPE_HEADER0_MASK1 (GENMASK_ULL(7, 6) | GENMASK_ULL(3, 0))
+#define SPE_HEADER0_EVENTS 0x42
+#define SPE_HEADER0_SOURCE 0x43
+/* Mask for context & operation */
+#define SPE_HEADER0_MASK2 GENMASK_ULL(7, 2)
+#define SPE_HEADER0_CONTEXT 0x64
+#define SPE_HEADER0_OP_TYPE 0x48
+/* Mask for extended format */
+#define SPE_HEADER0_EXTENDED 0x20
+/* Mask for address & counter */
+#define SPE_HEADER0_MASK3 GENMASK_ULL(7, 3)
+#define SPE_HEADER0_ADDRESS 0xb0
+#define SPE_HEADER0_COUNTER 0x98
+#define SPE_HEADER1_ALIGNMENT 0x0
+
#define SPE_ADDR_PKT_HDR_INDEX_INS (0x0)
#define SPE_ADDR_PKT_HDR_INDEX_BRANCH (0x1)
#define SPE_ADDR_PKT_HDR_INDEX_DATA_VIRT (0x2)
--
2.17.1
This patch is to refactor address packet handling, it defines macros for
address packet's header and payload, these macros are used by decoder
and the dump flow.
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
.../util/arm-spe-decoder/arm-spe-decoder.c | 29 ++++++++-------
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 26 +++++++-------
.../arm-spe-decoder/arm-spe-pkt-decoder.h | 35 ++++++++++++-------
3 files changed, 48 insertions(+), 42 deletions(-)
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
index cc18a1e8c212..776b3e6628bb 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
@@ -24,36 +24,35 @@
static u64 arm_spe_calc_ip(int index, u64 payload)
{
- u8 *addr = (u8 *)&payload;
- int ns, el;
+ u64 ns, el;
/* Instruction virtual address or Branch target address */
if (index == SPE_ADDR_PKT_HDR_INDEX_INS ||
index == SPE_ADDR_PKT_HDR_INDEX_BRANCH) {
- ns = addr[7] & SPE_ADDR_PKT_NS;
- el = (addr[7] & SPE_ADDR_PKT_EL_MASK) >> SPE_ADDR_PKT_EL_OFFSET;
+ ns = SPE_ADDR_PKT_GET_NS(payload);
+ el = SPE_ADDR_PKT_GET_EL(payload);
+
+ /* Clean highest byte */
+ payload = SPE_ADDR_PKT_ADDR_GET_BYTES_0_6(payload);
/* Fill highest byte for EL1 or EL2 (VHE) mode */
if (ns && (el == SPE_ADDR_PKT_EL1 || el == SPE_ADDR_PKT_EL2))
- addr[7] = 0xff;
- /* Clean highest byte for other cases */
- else
- addr[7] = 0x0;
+ payload |= 0xffULL << SPE_ADDR_PKT_ADDR_BYTE7_SHIFT;
/* Data access virtual address */
} else if (index == SPE_ADDR_PKT_HDR_INDEX_DATA_VIRT) {
+ /* Clean tags */
+ payload = SPE_ADDR_PKT_ADDR_GET_BYTES_0_6(payload);
+
/* Fill highest byte if bits [48..55] is 0xff */
- if (addr[6] == 0xff)
- addr[7] = 0xff;
- /* Otherwise, cleanup tags */
- else
- addr[7] = 0x0;
+ if (SPE_ADDR_PKT_ADDR_GET_BYTE_6(payload) == 0xffULL)
+ payload |= 0xffULL << SPE_ADDR_PKT_ADDR_BYTE7_SHIFT;
/* Data access physical address */
} else if (index == SPE_ADDR_PKT_HDR_INDEX_DATA_PHYS) {
- /* Cleanup byte 7 */
- addr[7] = 0x0;
+ /* Clean highest byte */
+ payload = SPE_ADDR_PKT_ADDR_GET_BYTES_0_6(payload);
} else {
pr_err("unsupported address packet index: 0x%x\n", index);
}
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
index b16d68b40bbd..d37c4008adbc 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -13,9 +13,6 @@
#include "arm-spe-pkt-decoder.h"
-#define NS_FLAG BIT_ULL(63)
-#define EL_FLAG (BIT_ULL(62) | BIT_ULL(61))
-
#if __BYTE_ORDER == __BIG_ENDIAN
#define le16_to_cpu bswap_16
#define le32_to_cpu bswap_32
@@ -167,10 +164,11 @@ 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 = ((buf[0] & 0x3) << 3) | (buf[1] & 0x7);
+ packet->index = SPE_HDR_EXTENDED_INDEX(buf[0], buf[1]);
else
- packet->index = buf[0] & 0x7;
+ packet->index = SPE_HDR_SHORT_INDEX(buf[0]);
return arm_spe_get_payload(buf, len, ext_hdr, packet);
}
@@ -296,22 +294,22 @@ static int arm_spe_pkt_desc_addr(const struct arm_spe_pkt *packet,
int err = 0;
switch (idx) {
- case 0:
- case 1:
- ns = !!(packet->payload & NS_FLAG);
- el = (packet->payload & EL_FLAG) >> 61;
- payload &= ~(0xffULL << 56);
+ 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 2:
+ case SPE_ADDR_PKT_HDR_INDEX_DATA_VIRT:
arm_spe_pkt_out_string(&err, &buf, &buf_len,
"VA 0x%llx", payload);
break;
- case 3:
- ns = !!(packet->payload & NS_FLAG);
- payload &= ~(0xffULL << 56);
+ case SPE_ADDR_PKT_HDR_INDEX_DATA_PHYS:
+ ns = !!SPE_ADDR_PKT_GET_NS(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", payload, ns);
break;
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
index 129f43405eb1..f97d6840be3a 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
@@ -56,19 +56,28 @@ struct arm_spe_pkt {
#define SPE_HEADER0_COUNTER 0x98
#define SPE_HEADER1_ALIGNMENT 0x0
-#define SPE_ADDR_PKT_HDR_INDEX_INS (0x0)
-#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_NS BIT(7)
-#define SPE_ADDR_PKT_CH BIT(6)
-#define SPE_ADDR_PKT_EL_OFFSET (5)
-#define SPE_ADDR_PKT_EL_MASK (0x3 << SPE_ADDR_PKT_EL_OFFSET)
-#define SPE_ADDR_PKT_EL0 (0)
-#define SPE_ADDR_PKT_EL1 (1)
-#define SPE_ADDR_PKT_EL2 (2)
-#define SPE_ADDR_PKT_EL3 (3)
+#define SPE_HDR_SHORT_INDEX(h) ((h) & GENMASK_ULL(2, 0))
+#define SPE_HDR_EXTENDED_INDEX(h0, h1) (((h0) & GENMASK_ULL(1, 0)) << 3 | \
+ SPE_HDR_SHORT_INDEX(h1))
+
+/* Address packet header */
+#define SPE_ADDR_PKT_HDR_INDEX_INS 0x0
+#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
+
+/* Address packet payload */
+#define SPE_ADDR_PKT_ADDR_BYTE7_SHIFT 56
+#define SPE_ADDR_PKT_ADDR_GET_BYTES_0_6(v) ((v) & GENMASK_ULL(55, 0))
+#define SPE_ADDR_PKT_ADDR_GET_BYTE_6(v) (((v) & GENMASK_ULL(55, 48)) >> 48)
+
+#define SPE_ADDR_PKT_GET_NS(v) (((v) & BIT_ULL(63)) >> 63)
+#define SPE_ADDR_PKT_GET_EL(v) (((v) & GENMASK_ULL(62, 61)) >> 61)
+
+#define SPE_ADDR_PKT_EL0 0
+#define SPE_ADDR_PKT_EL1 1
+#define SPE_ADDR_PKT_EL2 2
+#define SPE_ADDR_PKT_EL3 3
const char *arm_spe_pkt_name(enum arm_spe_pkt_type);
--
2.17.1
This patch moves out the counter packet parsing code from
arm_spe_pkt_desc() to the new function arm_spe_pkt_desc_counter().
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 43 ++++++++++++-------
1 file changed, 28 insertions(+), 15 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
index 978f5551b82c..397ade5ffdeb 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -322,6 +322,33 @@ static int arm_spe_pkt_desc_addr(const struct arm_spe_pkt *packet,
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 0:
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, "TOT");
+ break;
+ case 1:
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, "ISSUE");
+ break;
+ case 2:
+ 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)
{
@@ -414,21 +441,7 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
name, (unsigned long)payload, idx + 1);
break;
case ARM_SPE_COUNTER:
- arm_spe_pkt_out_string(&err, &buf, &blen, "%s %d ", name,
- (unsigned short)payload);
- switch (idx) {
- case 0:
- arm_spe_pkt_out_string(&err, &buf, &blen, "TOT");
- break;
- case 1:
- arm_spe_pkt_out_string(&err, &buf, &blen, "ISSUE");
- break;
- case 2:
- arm_spe_pkt_out_string(&err, &buf, &blen, "XLAT");
- break;
- default:
- break;
- }
+ err = arm_spe_pkt_desc_counter(packet, buf, buf_len);
break;
default:
/* Unknown packet type */
--
2.17.1
This patch moves out the event packet parsing from arm_spe_pkt_desc()
to the new function arm_spe_pkt_desc_event().
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 63 +++++++++++--------
1 file changed, 37 insertions(+), 26 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
index 52f4339b1f0c..da6b9f76739c 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -287,6 +287,42 @@ static int arm_spe_pkt_out_string(int *err, char **buf_p, size_t *blen,
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 & 0x1)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " EXCEPTION-GEN");
+ if (payload & 0x2)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " RETIRED");
+ if (payload & 0x4)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " L1D-ACCESS");
+ if (payload & 0x8)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " L1D-REFILL");
+ if (payload & 0x10)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " TLB-ACCESS");
+ if (payload & 0x20)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " TLB-REFILL");
+ if (payload & 0x40)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " NOT-TAKEN");
+ if (payload & 0x80)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " MISPRED");
+ if (packet->index > 1) {
+ if (payload & 0x100)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " LLC-ACCESS");
+ if (payload & 0x200)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " LLC-REFILL");
+ if (payload & 0x400)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " REMOTE-ACCESS");
+ }
+
+ return err;
+}
+
static int arm_spe_pkt_desc_addr(const struct arm_spe_pkt *packet,
char *buf, size_t buf_len)
{
@@ -367,32 +403,7 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
arm_spe_pkt_out_string(&err, &buf, &blen, "%s", name);
break;
case ARM_SPE_EVENTS:
- arm_spe_pkt_out_string(&err, &buf, &blen, "EV");
-
- if (payload & 0x1)
- arm_spe_pkt_out_string(&err, &buf, &blen, " EXCEPTION-GEN");
- if (payload & 0x2)
- arm_spe_pkt_out_string(&err, &buf, &blen, " RETIRED");
- if (payload & 0x4)
- arm_spe_pkt_out_string(&err, &buf, &blen, " L1D-ACCESS");
- if (payload & 0x8)
- arm_spe_pkt_out_string(&err, &buf, &blen, " L1D-REFILL");
- if (payload & 0x10)
- arm_spe_pkt_out_string(&err, &buf, &blen, " TLB-ACCESS");
- if (payload & 0x20)
- arm_spe_pkt_out_string(&err, &buf, &blen, " TLB-REFILL");
- if (payload & 0x40)
- arm_spe_pkt_out_string(&err, &buf, &blen, " NOT-TAKEN");
- if (payload & 0x80)
- arm_spe_pkt_out_string(&err, &buf, &blen, " MISPRED");
- if (idx > 1) {
- if (payload & 0x100)
- arm_spe_pkt_out_string(&err, &buf, &blen, " LLC-ACCESS");
- if (payload & 0x200)
- arm_spe_pkt_out_string(&err, &buf, &blen, " LLC-REFILL");
- if (payload & 0x400)
- arm_spe_pkt_out_string(&err, &buf, &blen, " REMOTE-ACCESS");
- }
+ err = arm_spe_pkt_desc_event(packet, buf, buf_len);
break;
case ARM_SPE_OP_TYPE:
switch (idx) {
--
2.17.1
The operation type packet is complex and contains subclass; the parsing
flow causes deep indentation; for more readable, this patch introduces
a new function arm_spe_pkt_desc_op_type() which is used for operation
type parsing.
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 79 +++++++++++--------
1 file changed, 45 insertions(+), 34 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
index 88bcf7e5be76..d6c060f119b4 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -321,6 +321,50 @@ static int arm_spe_pkt_desc_event(const struct arm_spe_pkt *packet,
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 0:
+ arm_spe_pkt_out_string(&err, &buf, &buf_len,
+ payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
+ break;
+ case 1:
+ arm_spe_pkt_out_string(&err, &buf, &buf_len,
+ payload & 0x1 ? "ST" : "LD");
+
+ if (payload & 0x2) {
+ if (payload & 0x4)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " AT");
+ if (payload & 0x8)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " EXCL");
+ if (payload & 0x10)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " AR");
+ } else if (payload & 0x4) {
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " SIMD-FP");
+ }
+ break;
+ case 2:
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, "B");
+
+ if (payload & 0x1)
+ arm_spe_pkt_out_string(&err, &buf, &buf_len, " COND");
+ if (payload & 0x2)
+ 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)
{
@@ -404,40 +448,7 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
err = arm_spe_pkt_desc_event(packet, buf, buf_len);
break;
case ARM_SPE_OP_TYPE:
- switch (idx) {
- case 0:
- arm_spe_pkt_out_string(&err, &buf, &blen,
- payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
- break;
- case 1:
- arm_spe_pkt_out_string(&err, &buf, &blen,
- payload & 0x1 ? "ST" : "LD");
-
- if (payload & 0x2) {
- if (payload & 0x4)
- arm_spe_pkt_out_string(&err, &buf, &blen, " AT");
- if (payload & 0x8)
- arm_spe_pkt_out_string(&err, &buf, &blen, " EXCL");
- if (payload & 0x10)
- arm_spe_pkt_out_string(&err, &buf, &blen, " AR");
- } else if (payload & 0x4) {
- arm_spe_pkt_out_string(&err, &buf, &blen, " SIMD-FP");
- }
- break;
- case 2:
- arm_spe_pkt_out_string(&err, &buf, &blen, "B");
-
- if (payload & 0x1)
- arm_spe_pkt_out_string(&err, &buf, &blen, " COND");
- if (payload & 0x2)
- arm_spe_pkt_out_string(&err, &buf, &blen, " IND");
-
- break;
- default:
- /* Unknown index */
- err = -1;
- break;
- }
+ err = arm_spe_pkt_desc_op_type(packet, buf, buf_len);
break;
case ARM_SPE_DATA_SOURCE:
case ARM_SPE_TIMESTAMP:
--
2.17.1
Defines macros for operation packet header and formats (support sub
classes for 'other', 'branch', 'load and store', etc). Uses these
macros for operation packet decoding and dumping.
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 26 ++++++++++---------
.../arm-spe-decoder/arm-spe-pkt-decoder.h | 23 ++++++++++++++++
2 files changed, 37 insertions(+), 12 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
index d6c060f119b4..1d1354a0eef4 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -144,7 +144,7 @@ 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 = buf[0] & 0x3;
+ packet->index = SPE_OP_PKT_HDR_CLASS(buf[0]);
return arm_spe_get_payload(buf, len, 0, packet);
}
@@ -328,31 +328,33 @@ static int arm_spe_pkt_desc_op_type(const struct arm_spe_pkt *packet,
int err = 0;
switch (packet->index) {
- case 0:
+ case SPE_OP_PKT_HDR_CLASS_OTHER:
arm_spe_pkt_out_string(&err, &buf, &buf_len,
- payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
+ payload & SPE_OP_PKT_COND ? "COND-SELECT" : "INSN-OTHER");
break;
- case 1:
+ case SPE_OP_PKT_HDR_CLASS_LD_ST_ATOMIC:
arm_spe_pkt_out_string(&err, &buf, &buf_len,
payload & 0x1 ? "ST" : "LD");
- if (payload & 0x2) {
- if (payload & 0x4)
+ 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 & 0x8)
+ if (payload & SPE_OP_PKT_EXCL)
arm_spe_pkt_out_string(&err, &buf, &buf_len, " EXCL");
- if (payload & 0x10)
+ if (payload & SPE_OP_PKT_AR)
arm_spe_pkt_out_string(&err, &buf, &buf_len, " AR");
- } else if (payload & 0x4) {
+ } else if (SPE_OP_PKT_LDST_SUBCLASS_GET(payload) ==
+ SPE_OP_PKT_LDST_SUBCLASS_SIMD_FP) {
arm_spe_pkt_out_string(&err, &buf, &buf_len, " SIMD-FP");
}
break;
- case 2:
+ case SPE_OP_PKT_HDR_CLASS_BR_ERET:
arm_spe_pkt_out_string(&err, &buf, &buf_len, "B");
- if (payload & 0x1)
+ if (payload & SPE_OP_PKT_COND)
arm_spe_pkt_out_string(&err, &buf, &buf_len, " COND");
- if (payload & 0x2)
+
+ if (SPE_OP_PKT_IS_INDIRECT_BRANCH(payload))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " IND");
break;
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
index 42ed4e61ede2..7032fc141ad4 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
@@ -105,6 +105,29 @@ enum arm_spe_events {
EV_EMPTY_PREDICATE = 18,
};
+/* Operation packet header */
+#define SPE_OP_PKT_HDR_CLASS(h) ((h) & GENMASK_ULL(1, 0))
+#define SPE_OP_PKT_HDR_CLASS_OTHER 0x0
+#define SPE_OP_PKT_HDR_CLASS_LD_ST_ATOMIC 0x1
+#define SPE_OP_PKT_HDR_CLASS_BR_ERET 0x2
+
+#define SPE_OP_PKT_COND BIT(0)
+
+#define SPE_OP_PKT_LDST_SUBCLASS_GET(v) ((v) & GENMASK_ULL(7, 1))
+#define SPE_OP_PKT_LDST_SUBCLASS_GP_REG 0x0
+#define SPE_OP_PKT_LDST_SUBCLASS_SIMD_FP 0x4
+#define SPE_OP_PKT_LDST_SUBCLASS_UNSPEC_REG 0x10
+#define SPE_OP_PKT_LDST_SUBCLASS_NV_SYSREG 0x30
+
+#define SPE_OP_PKT_IS_LDST_ATOMIC(v) (((v) & (GENMASK_ULL(7, 5) | BIT(1))) == 0x2)
+
+#define SPE_OP_PKT_AR BIT(4)
+#define SPE_OP_PKT_EXCL BIT(3)
+#define SPE_OP_PKT_AT BIT(2)
+#define SPE_OP_PKT_ST BIT(0)
+
+#define SPE_OP_PKT_IS_INDIRECT_BRANCH(v) (((v) & GENMASK_ULL(7, 1)) == 0x2)
+
const char *arm_spe_pkt_name(enum arm_spe_pkt_type);
int arm_spe_get_packet(const unsigned char *buf, size_t len,
--
2.17.1
To establish a valid address from the address packet payload and finally
the address value can be used for parsing data symbol in DSO, current
code uses 0xff to replace the tag in the top byte of data virtual
address.
So far the code only fixups top byte for the memory layouts with 4KB
pages, it misses to support memory layouts with 64KB pages.
This patch adds the conditions for checking bits [55:52] are 0xf, if
detects the pattern it will fill 0xff into the top byte of the address,
also adds comment to explain the fixing up.
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
.../util/arm-spe-decoder/arm-spe-decoder.c | 20 ++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
index 776b3e6628bb..cac2ef79c025 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
@@ -24,7 +24,7 @@
static u64 arm_spe_calc_ip(int index, u64 payload)
{
- u64 ns, el;
+ u64 ns, el, val;
/* Instruction virtual address or Branch target address */
if (index == SPE_ADDR_PKT_HDR_INDEX_INS ||
@@ -45,8 +45,22 @@ static u64 arm_spe_calc_ip(int index, u64 payload)
/* Clean tags */
payload = SPE_ADDR_PKT_ADDR_GET_BYTES_0_6(payload);
- /* Fill highest byte if bits [48..55] is 0xff */
- if (SPE_ADDR_PKT_ADDR_GET_BYTE_6(payload) == 0xffULL)
+ /*
+ * Armv8 ARM (ARM DDI 0487F.c), chapter "D10.2.1 Address packet"
+ * defines the data virtual address payload format, the top byte
+ * (bits [63:56]) is assigned as top-byte tag; so we only can
+ * retrieve address value from bits [55:0].
+ *
+ * According to Documentation/arm64/memory.rst, if detects the
+ * specific pattern in bits [55:52] of payload which falls in
+ * the kernel space, should fixup the top byte and this allows
+ * perf tool to parse DSO symbol for data address correctly.
+ *
+ * For this reason, if detects the bits [55:52] is 0xf, will
+ * fill 0xff into the top byte.
+ */
+ val = SPE_ADDR_PKT_ADDR_GET_BYTE_6(payload);
+ if ((val & 0xf0ULL) == 0xf0ULL)
payload |= 0xffULL << SPE_ADDR_PKT_ADDR_BYTE7_SHIFT;
/* Data access physical address */
--
2.17.1
Minor refactoring to use macro for index mask.
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c | 2 +-
tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h | 3 +++
2 files changed, 4 insertions(+), 1 deletion(-)
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
index d37c4008adbc..978f5551b82c 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -136,7 +136,7 @@ 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 = buf[0] & 0x3;
+ packet->index = SPE_CTX_PKT_HDR_INDEX(buf[0]);
return arm_spe_get_payload(buf, len, 0, packet);
}
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
index f97d6840be3a..9bc876bffd35 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
@@ -79,6 +79,9 @@ struct arm_spe_pkt {
#define SPE_ADDR_PKT_EL2 2
#define SPE_ADDR_PKT_EL3 3
+/* Context packet header */
+#define SPE_CTX_PKT_HDR_INDEX(h) ((h) & GENMASK_ULL(1, 0))
+
const char *arm_spe_pkt_name(enum arm_spe_pkt_type);
int arm_spe_get_packet(const unsigned char *buf, size_t len,
--
2.17.1
From: Andre Przywara <[email protected]>
When SPE records a physical address, it can additionally tag the event
with information from the Memory Tagging architecture extension.
Decode the two additional fields in the SPE event payload.
[leoy: Refined patch to use predefined macros]
Signed-off-by: Andre Przywara <[email protected]>
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Dave Martin <[email protected]>
---
tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c | 6 +++++-
tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h | 2 ++
2 files changed, 7 insertions(+), 1 deletion(-)
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
index 84d661aab54f..57c01ce27915 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -385,6 +385,7 @@ 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;
@@ -404,9 +405,12 @@ static int arm_spe_pkt_desc_addr(const struct arm_spe_pkt *packet,
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", payload, ns);
+ "PA 0x%llx ns=%d ch=%d pat=%x",
+ payload, ns, ch, pat);
break;
default:
/* Unknown index */
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
index 7032fc141ad4..1ad14885c2a1 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
@@ -73,6 +73,8 @@ struct arm_spe_pkt {
#define SPE_ADDR_PKT_GET_NS(v) (((v) & BIT_ULL(63)) >> 63)
#define SPE_ADDR_PKT_GET_EL(v) (((v) & GENMASK_ULL(62, 61)) >> 61)
+#define SPE_ADDR_PKT_GET_CH(v) (((v) & BIT_ULL(62)) >> 62)
+#define SPE_ADDR_PKT_GET_PAT(v) (((v) & GENMASK_ULL(59, 56)) >> 56)
#define SPE_ADDR_PKT_EL0 0
#define SPE_ADDR_PKT_EL1 1
--
2.17.1
From: Wei Li <[email protected]>
This patch is to support Armv8.3 extension for SPE, it adds alignment
field in the Events packet and it supports the Scalable Vector Extension
(SVE) for Operation packet and Events packet with two additions:
- The vector length for SVE operations in the Operation Type packet;
- The incomplete predicate and empty predicate fields in the Events
packet.
Signed-off-by: Wei Li <[email protected]>
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 36 +++++++++++++++++--
.../arm-spe-decoder/arm-spe-pkt-decoder.h | 16 +++++++++
2 files changed, 50 insertions(+), 2 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
index 57c01ce27915..f3ac9d40cebf 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -317,6 +317,12 @@ static int arm_spe_pkt_desc_event(const struct arm_spe_pkt *packet,
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;
}
@@ -329,8 +335,23 @@ static int arm_spe_pkt_desc_op_type(const struct arm_spe_pkt *packet,
switch (packet->index) {
case SPE_OP_PKT_HDR_CLASS_OTHER:
- arm_spe_pkt_out_string(&err, &buf, &buf_len,
- payload & SPE_OP_PKT_COND ? "COND-SELECT" : "INSN-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,
@@ -361,6 +382,17 @@ static int arm_spe_pkt_desc_op_type(const struct arm_spe_pkt *packet,
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");
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
index 1ad14885c2a1..9b970e7bf1e2 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
@@ -113,6 +113,8 @@ enum arm_spe_events {
#define SPE_OP_PKT_HDR_CLASS_LD_ST_ATOMIC 0x1
#define SPE_OP_PKT_HDR_CLASS_BR_ERET 0x2
+#define SPE_OP_PKT_IS_OTHER_SVE_OP(v) (((v) & (BIT(7) | BIT(3) | BIT(0))) == 0x8)
+
#define SPE_OP_PKT_COND BIT(0)
#define SPE_OP_PKT_LDST_SUBCLASS_GET(v) ((v) & GENMASK_ULL(7, 1))
@@ -128,6 +130,20 @@ enum arm_spe_events {
#define SPE_OP_PKT_AT BIT(2)
#define SPE_OP_PKT_ST BIT(0)
+#define SPE_OP_PKT_IS_LDST_SVE(v) (((v) & (BIT(3) | BIT(1))) == 0x8)
+
+#define SPE_OP_PKT_SVE_SG BIT(7)
+/*
+ * SVE effective vector length (EVL) is stored in byte 0 bits [6:4];
+ * the length is rounded up to a power of two and use 32 as one step,
+ * so EVL calculation is:
+ *
+ * 32 * (2 ^ bits [6:4]) = 32 << (bits [6:4])
+ */
+#define SPE_OP_PKG_SVE_EVL(v) (32 << (((v) & GENMASK_ULL(6, 4)) >> 4))
+#define SPE_OP_PKT_SVE_PRED BIT(2)
+#define SPE_OP_PKT_SVE_FP BIT(1)
+
#define SPE_OP_PKT_IS_INDIRECT_BRANCH(v) (((v) & GENMASK_ULL(7, 1)) == 0x2)
const char *arm_spe_pkt_name(enum arm_spe_pkt_type);
--
2.17.1
In the Armv8 ARM (ARM DDI 0487F.c), chapter "D10.2.6 Events packet", it
describes the event bit is valid with specific payload requirement. For
example, the Last Level cache access event, the bit is defined as:
E[8], byte 1 bit [0], when SZ == 0b01 , when SZ == 0b10 ,
or when SZ == 0b11
It requires the payload size is at least 2 bytes, when byte 1 (start
counting from 0) is valid, E[8] (bit 0 in byte 1) can be used for LLC
access event type. For safety, the code checks the condition for
payload size firstly, if meet the requirement for payload size, then
continue to parse event type.
If review function arm_spe_get_payload(), it has used cast, so any bytes
beyond the valid size have been set to zeros.
For this reason, we don't need to check payload size anymore afterwards
when parse events, thus this patch removes payload size conditions.
Suggested-by: Andre Przywara <[email protected]>
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
tools/perf/util/arm-spe-decoder/arm-spe-decoder.c | 9 +++------
.../util/arm-spe-decoder/arm-spe-pkt-decoder.c | 14 ++++++--------
2 files changed, 9 insertions(+), 14 deletions(-)
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
index cac2ef79c025..90d575cee1b9 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
@@ -192,16 +192,13 @@ static int arm_spe_read_record(struct arm_spe_decoder *decoder)
if (payload & BIT(EV_TLB_ACCESS))
decoder->record.type |= ARM_SPE_TLB_ACCESS;
- if ((idx == 2 || idx == 4 || idx == 8) &&
- (payload & BIT(EV_LLC_MISS)))
+ if (payload & BIT(EV_LLC_MISS))
decoder->record.type |= ARM_SPE_LLC_MISS;
- if ((idx == 2 || idx == 4 || idx == 8) &&
- (payload & BIT(EV_LLC_ACCESS)))
+ if (payload & BIT(EV_LLC_ACCESS))
decoder->record.type |= ARM_SPE_LLC_ACCESS;
- if ((idx == 2 || idx == 4 || idx == 8) &&
- (payload & BIT(EV_REMOTE_ACCESS)))
+ if (payload & BIT(EV_REMOTE_ACCESS))
decoder->record.type |= ARM_SPE_REMOTE_ACCESS;
if (payload & BIT(EV_MISPRED))
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
index 3f30b2937715..88bcf7e5be76 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -311,14 +311,12 @@ static int arm_spe_pkt_desc_event(const struct arm_spe_pkt *packet,
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 (packet->index > 1) {
- 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_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");
return err;
}
--
2.17.1
Move the enums of event types to arm-spe-pkt-decoder.h, thus function
arm_spe_pkt_desc_event() can use them for bitmasks.
Suggested-by: Andre Przywara <[email protected]>
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
.../util/arm-spe-decoder/arm-spe-decoder.h | 17 --------------
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 22 +++++++++----------
.../arm-spe-decoder/arm-spe-pkt-decoder.h | 18 +++++++++++++++
3 files changed, 29 insertions(+), 28 deletions(-)
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h
index a5111a8d4360..24727b8ca7ff 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h
@@ -13,23 +13,6 @@
#include "arm-spe-pkt-decoder.h"
-enum arm_spe_events {
- EV_EXCEPTION_GEN = 0,
- EV_RETIRED = 1,
- EV_L1D_ACCESS = 2,
- EV_L1D_REFILL = 3,
- EV_TLB_ACCESS = 4,
- EV_TLB_WALK = 5,
- EV_NOT_TAKEN = 6,
- EV_MISPRED = 7,
- EV_LLC_ACCESS = 8,
- EV_LLC_MISS = 9,
- EV_REMOTE_ACCESS = 10,
- EV_ALIGNMENT = 11,
- EV_PARTIAL_PREDICATE = 17,
- EV_EMPTY_PREDICATE = 18,
-};
-
enum arm_spe_sample_type {
ARM_SPE_L1D_ACCESS = 1 << 0,
ARM_SPE_L1D_MISS = 1 << 1,
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
index da6b9f76739c..3f30b2937715 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -295,28 +295,28 @@ static int arm_spe_pkt_desc_event(const struct arm_spe_pkt *packet,
arm_spe_pkt_out_string(&err, &buf, &buf_len, "EV");
- if (payload & 0x1)
+ if (payload & BIT(EV_EXCEPTION_GEN))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " EXCEPTION-GEN");
- if (payload & 0x2)
+ if (payload & BIT(EV_RETIRED))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " RETIRED");
- if (payload & 0x4)
+ if (payload & BIT(EV_L1D_ACCESS))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " L1D-ACCESS");
- if (payload & 0x8)
+ if (payload & BIT(EV_L1D_REFILL))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " L1D-REFILL");
- if (payload & 0x10)
+ if (payload & BIT(EV_TLB_ACCESS))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " TLB-ACCESS");
- if (payload & 0x20)
+ if (payload & BIT(EV_TLB_WALK))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " TLB-REFILL");
- if (payload & 0x40)
+ if (payload & BIT(EV_NOT_TAKEN))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " NOT-TAKEN");
- if (payload & 0x80)
+ if (payload & BIT(EV_MISPRED))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " MISPRED");
if (packet->index > 1) {
- if (payload & 0x100)
+ if (payload & BIT(EV_LLC_ACCESS))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " LLC-ACCESS");
- if (payload & 0x200)
+ if (payload & BIT(EV_LLC_MISS))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " LLC-REFILL");
- if (payload & 0x400)
+ if (payload & BIT(EV_REMOTE_ACCESS))
arm_spe_pkt_out_string(&err, &buf, &buf_len, " REMOTE-ACCESS");
}
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
index 7d8e34e35f05..42ed4e61ede2 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
@@ -87,6 +87,24 @@ struct arm_spe_pkt {
#define SPE_CNT_PKT_HDR_INDEX_ISSUE_LAT 0x1
#define SPE_CNT_PKT_HDR_INDEX_TRANS_LAT 0x2
+/* Event packet payload */
+enum arm_spe_events {
+ EV_EXCEPTION_GEN = 0,
+ EV_RETIRED = 1,
+ EV_L1D_ACCESS = 2,
+ EV_L1D_REFILL = 3,
+ EV_TLB_ACCESS = 4,
+ EV_TLB_WALK = 5,
+ EV_NOT_TAKEN = 6,
+ EV_MISPRED = 7,
+ EV_LLC_ACCESS = 8,
+ EV_LLC_MISS = 9,
+ EV_REMOTE_ACCESS = 10,
+ EV_ALIGNMENT = 11,
+ EV_PARTIAL_PREDICATE = 17,
+ EV_EMPTY_PREDICATE = 18,
+};
+
const char *arm_spe_pkt_name(enum arm_spe_pkt_type);
int arm_spe_get_packet(const unsigned char *buf, size_t len,
--
2.17.1
For the operation type packet payload with load/store class, it misses
to support these sub classes:
- A load/store targeting the general-purpose registers;
- A load/store targeting unspecified registers;
- The ARMv8.4 nested virtualisation extension can redirect system
register accesses to a memory page controlled by the hypervisor.
The SPE profiling feature in newer implementations can tag those
memory accesses accordingly.
Add the bit pattern describing load/store sub classes, so that the perf
tool can decode it properly.
Inspired by Andre Przywara, refined the commit log and code for more
clear description.
Co-developed-by: Andre Przywara <[email protected]>
Signed-off-by: Leo Yan <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
---
.../util/arm-spe-decoder/arm-spe-pkt-decoder.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 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
index 1d1354a0eef4..84d661aab54f 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -343,9 +343,23 @@ static int arm_spe_pkt_desc_op_type(const struct arm_spe_pkt *packet,
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");
- } else if (SPE_OP_PKT_LDST_SUBCLASS_GET(payload) ==
- SPE_OP_PKT_LDST_SUBCLASS_SIMD_FP) {
+ }
+
+ 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;
}
break;
case SPE_OP_PKT_HDR_CLASS_BR_ERET:
--
2.17.1
On Thu, Nov 19, 2020 at 11:24:25PM +0800, Leo Yan wrote:
> This is patch set v9 for refactoring Arm SPE trace decoding and dumping.
>
> According to comments and suggestions from patch set v8, it squashs the
> two patches into single one: "perf arm-spe: Refactor printing string to
> buffer" and "perf arm-spe: Consolidate arm_spe_pkt_desc()'s return
> value".
>
> In the patch 01/16, it renames the function arm_spe_pkt_snprintf() to
> arm_spe_pkt_out_string(), since the function is not the same semantics
> with snprintf(), the renaming can avoid confusion.
>
> This patch set is cleanly applied on the top of perf/core branch
> with commit 29396cd573da ("perf expr: Force encapsulation on
> expr_id_data").
>
> This patch set has been tested on Hisilicon D06 platform with commands
> "perf report -D" and "perf script", compared the decoding results
> between with this patch set and without this patch set, "diff" tool
> shows the result as expected.
>
> I also manually built the patches for arm/arm64/x86_64 and verfied
> every single patch can build successfully.
I'm unable to test this, so I'm please that you can! Anyway, it all looks
fine from a quick look:
Acked-by: Will Deacon <[email protected]>
so I think Arnaldo can pick this up when he's ready.
Cheers,
Will
Em Wed, Nov 25, 2020 at 02:17:56PM +0000, Will Deacon escreveu:
> On Thu, Nov 19, 2020 at 11:24:25PM +0800, Leo Yan wrote:
> > This is patch set v9 for refactoring Arm SPE trace decoding and dumping.
> >
> > According to comments and suggestions from patch set v8, it squashs the
> > two patches into single one: "perf arm-spe: Refactor printing string to
> > buffer" and "perf arm-spe: Consolidate arm_spe_pkt_desc()'s return
> > value".
> >
> > In the patch 01/16, it renames the function arm_spe_pkt_snprintf() to
> > arm_spe_pkt_out_string(), since the function is not the same semantics
> > with snprintf(), the renaming can avoid confusion.
> >
> > This patch set is cleanly applied on the top of perf/core branch
> > with commit 29396cd573da ("perf expr: Force encapsulation on
> > expr_id_data").
> >
> > This patch set has been tested on Hisilicon D06 platform with commands
> > "perf report -D" and "perf script", compared the decoding results
> > between with this patch set and without this patch set, "diff" tool
> > shows the result as expected.
> >
> > I also manually built the patches for arm/arm64/x86_64 and verfied
> > every single patch can build successfully.
>
> I'm unable to test this, so I'm please that you can! Anyway, it all looks
> fine from a quick look:
>
> Acked-by: Will Deacon <[email protected]>
>
> so I think Arnaldo can pick this up when he's ready.
This is all ARM specific stuff, if you are good with it, I'll do just a
cursory look and apply.
- Arnaldo
Em Thu, Nov 19, 2020 at 11:24:26PM +0800, Leo Yan escreveu:
> When outputs strings to the decoding buffer with function snprintf(),
> SPE decoder needs to detects if any error returns from snprintf() and if
> so needs to directly bail out. If snprintf() returns success, it needs
> to update buffer pointer and reduce the buffer length so can continue to
> output the next string into the consequent memory space.
>
> This complex logics are spreading in the function arm_spe_pkt_desc() so
> there has many duplicate codes for handling error detecting, increment
> buffer pointer and decrement buffer size.
>
> To avoid the duplicate code, this patch introduces a new helper function
> arm_spe_pkt_out_string() which is used to wrap up the complex logics,
> and it's used by the caller arm_spe_pkt_desc(). This patch moves the
> variable 'blen' as the function's local variable so allows to remove
> the unnecessary braces and improve the readability.
>
> This patch simplifies the return value for arm_spe_pkt_desc(): '0' means
> success and other values mean an error has occurred. To realize this,
> it relies on arm_spe_pkt_out_string()'s parameter 'err', the 'err' is a
> cumulative value, returns its final value if printing buffer is called
> for one time or multiple times. Finally, the error is handled in a
> central place, rather than directly bailing out in switch-cases, it
> returns error at the end of arm_spe_pkt_desc().
>
> This patch changes the caller arm_spe_dump() to respect the updated
> return value semantics of arm_spe_pkt_desc().
>
> Suggested-by: Dave Martin <[email protected]>
> Signed-off-by: Leo Yan <[email protected]>
> Reviewed-by: Andre Przywara <[email protected]>
> Reviewed-by: Dave Martin <[email protected]>
> ---
> .../arm-spe-decoder/arm-spe-pkt-decoder.c | 302 +++++++++---------
> tools/perf/util/arm-spe.c | 2 +-
> 2 files changed, 151 insertions(+), 153 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
> index 671a4763fb47..fbededc1bcd4 100644
> --- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> +++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> @@ -9,6 +9,7 @@
> #include <endian.h>
> #include <byteswap.h>
> #include <linux/bitops.h>
> +#include <stdarg.h>
>
> #include "arm-spe-pkt-decoder.h"
>
> @@ -258,192 +259,189 @@ int arm_spe_get_packet(const unsigned char *buf, size_t len,
> 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;
Ok, from a quick look this continues confusing, but at least its not
named scnprintf() and then people won't expect the usual semantics.
Applying.
- Arnaldo
> + /* 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;
> +}
> +
> int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
> size_t buf_len)
> {
> - int ret, ns, el, idx = packet->index;
> + int ns, el, 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:
> - return snprintf(buf, buf_len, "%s", name);
> - case ARM_SPE_EVENTS: {
> - size_t blen = buf_len;
> -
> - ret = 0;
> - ret = snprintf(buf, buf_len, "EV");
> - buf += ret;
> - blen -= ret;
> - if (payload & 0x1) {
> - ret = snprintf(buf, buf_len, " EXCEPTION-GEN");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x2) {
> - ret = snprintf(buf, buf_len, " RETIRED");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x4) {
> - ret = snprintf(buf, buf_len, " L1D-ACCESS");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x8) {
> - ret = snprintf(buf, buf_len, " L1D-REFILL");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x10) {
> - ret = snprintf(buf, buf_len, " TLB-ACCESS");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x20) {
> - ret = snprintf(buf, buf_len, " TLB-REFILL");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x40) {
> - ret = snprintf(buf, buf_len, " NOT-TAKEN");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x80) {
> - ret = snprintf(buf, buf_len, " MISPRED");
> - buf += ret;
> - blen -= ret;
> - }
> + arm_spe_pkt_out_string(&err, &buf, &blen, "%s", name);
> + break;
> + case ARM_SPE_EVENTS:
> + arm_spe_pkt_out_string(&err, &buf, &blen, "EV");
> +
> + if (payload & 0x1)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " EXCEPTION-GEN");
> + if (payload & 0x2)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " RETIRED");
> + if (payload & 0x4)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " L1D-ACCESS");
> + if (payload & 0x8)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " L1D-REFILL");
> + if (payload & 0x10)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " TLB-ACCESS");
> + if (payload & 0x20)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " TLB-REFILL");
> + if (payload & 0x40)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " NOT-TAKEN");
> + if (payload & 0x80)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " MISPRED");
> if (idx > 1) {
> - if (payload & 0x100) {
> - ret = snprintf(buf, buf_len, " LLC-ACCESS");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x200) {
> - ret = snprintf(buf, buf_len, " LLC-REFILL");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x400) {
> - ret = snprintf(buf, buf_len, " REMOTE-ACCESS");
> - buf += ret;
> - blen -= ret;
> - }
> + if (payload & 0x100)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " LLC-ACCESS");
> + if (payload & 0x200)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " LLC-REFILL");
> + if (payload & 0x400)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " REMOTE-ACCESS");
> }
> - if (ret < 0)
> - return ret;
> - blen -= ret;
> - return buf_len - blen;
> - }
> + break;
> case ARM_SPE_OP_TYPE:
> switch (idx) {
> - case 0: return snprintf(buf, buf_len, "%s", payload & 0x1 ?
> - "COND-SELECT" : "INSN-OTHER");
> - case 1: {
> - size_t blen = buf_len;
> + case 0:
> + arm_spe_pkt_out_string(&err, &buf, &blen,
> + payload & 0x1 ? "COND-SELECT" : "INSN-OTHER");
> + break;
> + case 1:
> + arm_spe_pkt_out_string(&err, &buf, &blen,
> + payload & 0x1 ? "ST" : "LD");
>
> - if (payload & 0x1)
> - ret = snprintf(buf, buf_len, "ST");
> - else
> - ret = snprintf(buf, buf_len, "LD");
> - buf += ret;
> - blen -= ret;
> if (payload & 0x2) {
> - if (payload & 0x4) {
> - ret = snprintf(buf, buf_len, " AT");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x8) {
> - ret = snprintf(buf, buf_len, " EXCL");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x10) {
> - ret = snprintf(buf, buf_len, " AR");
> - buf += ret;
> - blen -= ret;
> - }
> + if (payload & 0x4)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " AT");
> + if (payload & 0x8)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " EXCL");
> + if (payload & 0x10)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " AR");
> } else if (payload & 0x4) {
> - ret = snprintf(buf, buf_len, " SIMD-FP");
> - buf += ret;
> - blen -= ret;
> - }
> - if (ret < 0)
> - return ret;
> - blen -= ret;
> - return buf_len - blen;
> - }
> - case 2: {
> - size_t blen = buf_len;
> -
> - ret = snprintf(buf, buf_len, "B");
> - buf += ret;
> - blen -= ret;
> - if (payload & 0x1) {
> - ret = snprintf(buf, buf_len, " COND");
> - buf += ret;
> - blen -= ret;
> - }
> - if (payload & 0x2) {
> - ret = snprintf(buf, buf_len, " IND");
> - buf += ret;
> - blen -= ret;
> - }
> - if (ret < 0)
> - return ret;
> - blen -= ret;
> - return buf_len - blen;
> + arm_spe_pkt_out_string(&err, &buf, &blen, " SIMD-FP");
> }
> - default: return 0;
> + break;
> + case 2:
> + arm_spe_pkt_out_string(&err, &buf, &blen, "B");
> +
> + if (payload & 0x1)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " COND");
> + if (payload & 0x2)
> + arm_spe_pkt_out_string(&err, &buf, &blen, " IND");
> +
> + break;
> + default:
> + /* Unknown index */
> + err = -1;
> + break;
> }
> + break;
> case ARM_SPE_DATA_SOURCE:
> case ARM_SPE_TIMESTAMP:
> - return snprintf(buf, buf_len, "%s %lld", name, payload);
> + arm_spe_pkt_out_string(&err, &buf, &blen, "%s %lld", name, payload);
> + break;
> case ARM_SPE_ADDRESS:
> switch (idx) {
> case 0:
> - case 1: ns = !!(packet->payload & NS_FLAG);
> + case 1:
> + ns = !!(packet->payload & NS_FLAG);
> el = (packet->payload & EL_FLAG) >> 61;
> payload &= ~(0xffULL << 56);
> - return snprintf(buf, buf_len, "%s 0x%llx el%d ns=%d",
> + arm_spe_pkt_out_string(&err, &buf, &blen,
> + "%s 0x%llx el%d ns=%d",
> (idx == 1) ? "TGT" : "PC", payload, el, ns);
> - case 2: return snprintf(buf, buf_len, "VA 0x%llx", payload);
> - case 3: ns = !!(packet->payload & NS_FLAG);
> + break;
> + case 2:
> + arm_spe_pkt_out_string(&err, &buf, &blen,
> + "VA 0x%llx", payload);
> + break;
> + case 3:
> + ns = !!(packet->payload & NS_FLAG);
> payload &= ~(0xffULL << 56);
> - return snprintf(buf, buf_len, "PA 0x%llx ns=%d",
> - payload, ns);
> - default: return 0;
> + arm_spe_pkt_out_string(&err, &buf, &blen,
> + "PA 0x%llx ns=%d", payload, ns);
> + break;
> + default:
> + /* Unknown index */
> + err = -1;
> + break;
> }
> + break;
> case ARM_SPE_CONTEXT:
> - return snprintf(buf, buf_len, "%s 0x%lx el%d", name,
> - (unsigned long)payload, idx + 1);
> - case ARM_SPE_COUNTER: {
> - size_t blen = buf_len;
> -
> - ret = snprintf(buf, buf_len, "%s %d ", name,
> - (unsigned short)payload);
> - buf += ret;
> - blen -= ret;
> + arm_spe_pkt_out_string(&err, &buf, &blen, "%s 0x%lx el%d",
> + name, (unsigned long)payload, idx + 1);
> + break;
> + case ARM_SPE_COUNTER:
> + arm_spe_pkt_out_string(&err, &buf, &blen, "%s %d ", name,
> + (unsigned short)payload);
> switch (idx) {
> - case 0: ret = snprintf(buf, buf_len, "TOT"); break;
> - case 1: ret = snprintf(buf, buf_len, "ISSUE"); break;
> - case 2: ret = snprintf(buf, buf_len, "XLAT"); break;
> - default: ret = 0;
> + case 0:
> + arm_spe_pkt_out_string(&err, &buf, &blen, "TOT");
> + break;
> + case 1:
> + arm_spe_pkt_out_string(&err, &buf, &blen, "ISSUE");
> + break;
> + case 2:
> + arm_spe_pkt_out_string(&err, &buf, &blen, "XLAT");
> + break;
> + default:
> + break;
> }
> - if (ret < 0)
> - return ret;
> - blen -= ret;
> - return buf_len - blen;
> - }
> + break;
> default:
> + /* Unknown packet type */
> + err = -1;
> break;
> }
>
> - return snprintf(buf, buf_len, "%s 0x%llx (%d)",
> - name, payload, packet->index);
> + /* 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;
> }
> diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c
> index 3882a5360ada..8901a1656a41 100644
> --- a/tools/perf/util/arm-spe.c
> +++ b/tools/perf/util/arm-spe.c
> @@ -113,7 +113,7 @@ static void arm_spe_dump(struct arm_spe *spe __maybe_unused,
> if (ret > 0) {
> ret = arm_spe_pkt_desc(&packet, desc,
> ARM_SPE_PKT_DESC_MAX);
> - if (ret > 0)
> + if (!ret)
> color_fprintf(stdout, color, " %s\n", desc);
> } else {
> color_fprintf(stdout, color, " Bad packet!\n");
> --
> 2.17.1
>
--
- Arnaldo
On Wed, Nov 25, 2020 at 02:17:56PM +0000, Will Deacon wrote:
> On Thu, Nov 19, 2020 at 11:24:25PM +0800, Leo Yan wrote:
> > This is patch set v9 for refactoring Arm SPE trace decoding and dumping.
[...]
> > I also manually built the patches for arm/arm64/x86_64 and verfied
> > every single patch can build successfully.
>
> I'm unable to test this, so I'm please that you can! Anyway, it all looks
> fine from a quick look:
>
> Acked-by: Will Deacon <[email protected]>
>
> so I think Arnaldo can pick this up when he's ready.
Thanks for review, Will.
I will consider to enable automatic method (e.g. using container) for
the cross compilation perf tool with new patches.
Thanks,
Leo
On Thu, Nov 26, 2020 at 09:11:58AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Thu, Nov 19, 2020 at 11:24:26PM +0800, Leo Yan escreveu:
> > When outputs strings to the decoding buffer with function snprintf(),
> > SPE decoder needs to detects if any error returns from snprintf() and if
> > so needs to directly bail out. If snprintf() returns success, it needs
> > to update buffer pointer and reduce the buffer length so can continue to
> > output the next string into the consequent memory space.
> >
> > This complex logics are spreading in the function arm_spe_pkt_desc() so
> > there has many duplicate codes for handling error detecting, increment
> > buffer pointer and decrement buffer size.
> >
> > To avoid the duplicate code, this patch introduces a new helper function
> > arm_spe_pkt_out_string() which is used to wrap up the complex logics,
> > and it's used by the caller arm_spe_pkt_desc(). This patch moves the
> > variable 'blen' as the function's local variable so allows to remove
> > the unnecessary braces and improve the readability.
> >
> > This patch simplifies the return value for arm_spe_pkt_desc(): '0' means
> > success and other values mean an error has occurred. To realize this,
> > it relies on arm_spe_pkt_out_string()'s parameter 'err', the 'err' is a
> > cumulative value, returns its final value if printing buffer is called
> > for one time or multiple times. Finally, the error is handled in a
> > central place, rather than directly bailing out in switch-cases, it
> > returns error at the end of arm_spe_pkt_desc().
> >
> > This patch changes the caller arm_spe_dump() to respect the updated
> > return value semantics of arm_spe_pkt_desc().
> >
> > Suggested-by: Dave Martin <[email protected]>
> > Signed-off-by: Leo Yan <[email protected]>
> > Reviewed-by: Andre Przywara <[email protected]>
> > Reviewed-by: Dave Martin <[email protected]>
> > ---
> > .../arm-spe-decoder/arm-spe-pkt-decoder.c | 302 +++++++++---------
> > tools/perf/util/arm-spe.c | 2 +-
> > 2 files changed, 151 insertions(+), 153 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
> > index 671a4763fb47..fbededc1bcd4 100644
> > --- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> > +++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> > @@ -9,6 +9,7 @@
> > #include <endian.h>
> > #include <byteswap.h>
> > #include <linux/bitops.h>
> > +#include <stdarg.h>
> >
> > #include "arm-spe-pkt-decoder.h"
> >
> > @@ -258,192 +259,189 @@ int arm_spe_get_packet(const unsigned char *buf, size_t len,
> > 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;
>
>
> Ok, from a quick look this continues confusing, but at least its not
> named scnprintf() and then people won't expect the usual semantics.
Shame for the confusion :(
> Applying.
Thanks, Arnaldo.