RISC-V: vector: export VLENB csr in __sc_riscv_v_state

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VLENB is critical for callers of ptrace to reconstruct Vector register
files from the register dump of NT_RISCV_VECTOR. Also, future systems
may will have a writable VLENB, so add it now to potentially save future
compatibility issue.

Fixes: 0c59922c76 ("riscv: Add ptrace vector support")
Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Link: https://lore.kernel.org/r/20230816155450.26200-3-andy.chiu@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

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Andy Chiu 2023-08-16 15:54:49 +00:00 • committed by Palmer Dabbelt

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commit c35f3aa345

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3

arch/riscv/include/asm/vector.h

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1

arch/riscv/include/uapi/asm/ptrace.h

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