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cad539baa4
The BPF JIT needs to write invalid instructions to RX regions of memory to invalidate removed BPF programs. This needs a function like memset() that can work with RX memory. Implement patch_text_set_nosync() which is similar to text_poke_set() of x86. Signed-off-by: Puranjay Mohan <puranjay12@gmail.com> Reviewed-by: Pu Lehui <pulehui@huawei.com> Acked-by: Björn Töpel <bjorn@kernel.org> Tested-by: Björn Töpel <bjorn@rivosinc.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/r/20230831131229.497941-4-puranjay12@gmail.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
16 lines
385 B
C
16 lines
385 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2020 SiFive
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*/
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#ifndef _ASM_RISCV_PATCH_H
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#define _ASM_RISCV_PATCH_H
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int patch_text_nosync(void *addr, const void *insns, size_t len);
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int patch_text_set_nosync(void *addr, u8 c, size_t len);
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int patch_text(void *addr, u32 *insns, int ninsns);
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extern int riscv_patch_in_stop_machine;
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#endif /* _ASM_RISCV_PATCH_H */
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