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-rw-r--r--tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c302
1 files changed, 150 insertions, 152 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;
}
generated by cgit (git 2.34.1) at 2025-04-15 20:29:19 +0000