On Wed, 29 Jan 2025 11:16:36 +0200, Vladimir Kondratiev wrote: > Document optional property "riscv,hart-indexes" > > Risc-V APLIC specification defines "hart index" in [1]: > > Within a given interrupt domain, each of the domain’s harts has a > unique index number in the range 0 to 2^14 − 1 (= 16,383). The index > number a domain associates with a hart may or may not have any > relationship to the unique hart identifier (“hart ID”) that the > RISC-V Privileged Architecture assigns to the hart. Two different > interrupt domains may employ entirely different index numbers for > the same set of harts. > > Further, this document says in "4.5 Memory-mapped control > region for an interrupt domain": > > The array of IDC structures may include some for potential hart index > numbers that are not actual hart index numbers in the domain. For > example, the first IDC structure is always for hart index 0, but 0 is > not necessarily a valid index number for any hart in the domain. > > Support arbitrary hart indexes specified in optional APLIC property > "riscv,hart-indexes" that should be array of u32 elements, one per > interrupt target. If this property not specified, fallback is to use > logical hart indexes within the domain. > > [1]: https://github.com/riscv/riscv-aia > > Signed-off-by: Vladimir Kondratiev <vladimir.kondratiev@xxxxxxxxxxxx> > Reviewed-by: Anup Patel <anup@xxxxxxxxxxxxxx> > --- > .../bindings/interrupt-controller/riscv,aplic.yaml | 8 ++++++++ > 1 file changed, 8 insertions(+) > Reviewed-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
