[PATCH v4 09/21] perf arm-spe: Refactor address packet handling

From: Leo Yan
Date: Mon Oct 26 2020 - 23:10:59 EST

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 <leo.yan@xxxxxxxxxx>
---
.../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 e372e85e1c14..1218a731638f 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(63)
-#define EL_FLAG (BIT(62) | BIT(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);
}
@@ -274,20 +272,20 @@ static int arm_spe_pkt_desc_addr(const struct arm_spe_pkt *packet,
u64 payload = packet->payload;

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);
return arm_spe_pkt_snprintf(&buf, &buf_len,
"%s 0x%llx el%d ns=%d",
(idx == 1) ? "TGT" : "PC", payload, el, ns);
- case 2:
+ case SPE_ADDR_PKT_HDR_INDEX_DATA_VIRT:
return arm_spe_pkt_snprintf(&buf, &buf_len,
"VA 0x%llx", payload);
- 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);
return arm_spe_pkt_snprintf(&buf, &buf_len,
"PA 0x%llx ns=%d", payload, ns);
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 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