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| author | Anshuman Khandual <anshuman.khandual@arm.com> | 2024-12-11 09:54:25 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2024-12-19 20:01:07 +0300 |
| commit | 1e4a5e3679cc4d037982bfc822d939d5ba954e70 (patch) | |
| tree | 0b27a53881d0118c5f677e88736c8c44aaae35cf /tools/perf/scripts/python/gecko.py | |
| parent | 3e5be4e11aac40eb9d3ea6b5e79b7e95b0a6ebe5 (diff) | |
| download | linux-1e4a5e3679cc4d037982bfc822d939d5ba954e70.tar.xz | |
docs: arm64: Document EL3 requirements for FEAT_PMUv3
This documents EL3 requirements for FEAT_PMUv3. The register field MDCR_EL3
.TPM needs to be cleared for accesses into PMU registers without any trap
being generated into EL3. PMUv3 registers like PMCCFILTR_EL0, PMCCNTR_EL0
PMCNTENCLR_EL0, PMCNTENSET_EL0, PMCR_EL0, PMEVCNTR<n>_EL0, PMEVTYPER<n>_EL0
etc are already being accessed for perf HW PMU implementation.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20241211065425.1106683-3-anshuman.khandual@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/gecko.py')
0 files changed, 0 insertions, 0 deletions