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riscv: alternative: proceed one more instruction for auipc/jalr pair

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If we patched auipc + jalr pair, we'd better proceed one more
instruction. Andrew pointed out "There's not a problem now, since
we're only adding a fixup for jal, not jalr, but we should
future-proof this and there's no reason to revisit an already fixed-up
instruction anyway."

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Suggested-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20230115162811.3146-1-jszhang@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Jisheng Zhang 2023-01-16 00:28:11 +08:00 committed by Palmer Dabbelt
parent f3af3b0039
commit 91612cfb17
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arch/riscv/kernel/alternative.c
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@ -122,6 +122,7 @@ void riscv_alternative_fix_offsets(void *alt_ptr, unsigned int len,
riscv_alternative_fix_auipc_jalr(alt_ptr + i * sizeof(u32),
insn, insn2, patch_offset);
i++;
}
if (riscv_insn_is_jal(insn)) {