| fd10f08c | 13-Jan-2025 |
Will Deacon <[email protected]> |
Documentation: arm64: Remove stale and redundant virtual memory diagrams
The arm64 'memory.rst' file tries to document the virtual memory map
and the translation procedure for a couple of kernel con
Documentation: arm64: Remove stale and redundant virtual memory diagrams
The arm64 'memory.rst' file tries to document the virtual memory map
and the translation procedure for a couple of kernel configurations.
Unfortunately, the virtual memory map changes relatively frequently and
we support considerably more configurations than we did when the docs
were introduced (e.g. we now have support for 16KiB pages and 52-bit
addressing). Furthermore, the Arm ARM is the definitive resource for the
translation procedure and so there's little point in duplicating part
of that information in the kernel documentation.
Rather than continue trying (and failing) to maintain these diagrams,
let's rip them out. The kernel page-table can be dumped using
CONFIG_PTDUMP_DEBUGFS if necesssary.
Link: https://lore.kernel.org/r/[email protected]
Reported-by: Sangmoon Kim <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
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| 1e4a5e36 | 11-Dec-2024 |
Anshuman Khandual <[email protected]> |
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
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 <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Anshuman Khandual <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Will Deacon <[email protected]>
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