[PATCH 3/5] perf: arm_spe: Add nested virt event decoding

[Andre Przywara]

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 this load/store type, so that the perf
tool can decode it properly.

Signed-off-by: Andre Przywara <andre.przyw...@arm.com>
---
 tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c | 4 ++++
 1 file changed, 4 insertions(+)

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 e633bb5b8e65..943e4155b246 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
@@ -398,6 +398,10 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, 
char *buf,
                                        buf += ret;
                                        blen -= ret;
                                }
+                       } else if ((payload & 0xfe) == 0x30) {
+                               ret = snprintf(buf, buf_len, " NV-SYSREG");
+                               buf += ret;
+                               blen -= ret;
                        } else if (payload & 0x4) {
                                ret = snprintf(buf, buf_len, " SIMD-FP");
                                buf += ret;
-- 
2.17.1