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Add support for a new instruction BPF_JMP|BPF_X|BPF_JA, SRC=0, DST=Rx, off=0, imm=0 which does an indirect jump to a location stored in Rx. The register Rx should have type PTR_TO_INSN. This new type assures that the Rx register contains a value (or a range of values) loaded from a correct jump table – map of type instruction array. ARM64 JIT supports indirect jumps to all registers through the A64_BR() macro, use it to implement this new instruction. Signed-off-by: Puranjay Mohan <puranjay@kernel.org> Reviewed-by: Anton Protopopov <a.s.protopopov@gmail.com> Acked-by: Xu Kuohai <xukuohai@huawei.com> Link: https://lore.kernel.org/r/20251117130732.11107-3-puranjay@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>