This series adds support for Arm SPEv1.2 which is part of the
Armv8.7/Armv9.2 architecture. There's 2 new features that affect the
kernel: a new event filter bit, branch 'not taken', and an inverted
event filter register.
Since this support adds new registers and fields, first the SPE register
defines are converted to automatic generation.
Note that the 'config3' addition in sysfs format files causes SPE to
break. A stable fix e552b7be12ed ("perf: Skip and warn on unknown format
'configN' attrs") landed in v6.1-rc1.
The perf tool side changes are available here[1].
Tested on FVP.
[1] https://lore.kernel.org/all/20220914-arm-perf-tool-spe1-2-v2-v4-0-83c098e6212e@xxxxxxxxxx/
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
---
Changes in v3:
- Add some more missing SPE register fields and use Enums for some
fields
- Use the new PMSIDR_EL1 register Enum defines in the SPE driver
- Link to v2: https://lore.kernel.org/r/20220825-arm-spe-v8-7-v2-0-e37322d68ac0@xxxxxxxxxx
Changes in v2:
- Convert the SPE register defines to automatic generation
- Fixed access to SYS_PMSNEVFR_EL1 when not present
- Rebase on v6.1-rc1
- Link to v1: https://lore.kernel.org/r/20220825-arm-spe-v8-7-v1-0-c75b8d92e692@xxxxxxxxxx
---
Rob Herring (8):
perf: arm_spe: Use feature numbering for PMSEVFR_EL1 defines
arm64: Drop SYS_ from SPE register defines
arm64/sysreg: Convert SPE registers to automatic generation
perf: arm_spe: Drop BIT() and use FIELD_GET/PREP accessors
perf: arm_spe: Use new PMSIDR_EL1 register enums
perf: arm_spe: Support new SPEv1.2/v8.7 'not taken' event
perf: Add perf_event_attr::config3
perf: arm_spe: Add support for SPEv1.2 inverted event filtering
arch/arm64/include/asm/el2_setup.h | 6 +-
arch/arm64/include/asm/sysreg.h | 99 +++--------------------
arch/arm64/kvm/debug.c | 2 +-
arch/arm64/kvm/hyp/nvhe/debug-sr.c | 2 +-
arch/arm64/tools/sysreg | 139 +++++++++++++++++++++++++++++++++
drivers/perf/arm_spe_pmu.c | 156 ++++++++++++++++++++++++-------------
include/uapi/linux/perf_event.h | 3 +
7 files changed, 257 insertions(+), 150 deletions(-)
---
base-commit: 9abf2313adc1ca1b6180c508c25f22f9395cc780
change-id: 20220825-arm-spe-v8-7-fedf04e16f23
Best regards,
--
Rob Herring <robh@xxxxxxxxxx>
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