linux-kernel - [PATCH v2 0/4] Support trampoline for LoongArch

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Message-Id: <20250618105048.1510560-1-duanchenghao@kylinos.cn>
Date: Wed, 18 Jun 2025 18:50:44 +0800
From: Chenghao Duan <duanchenghao@...inos.cn>
To: ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	yangtiezhu@...ngson.cn,
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Subject: [PATCH v2 0/4] Support trampoline for LoongArch

v2:
1. Change the fixmap in the instruction copy function to set_memory_xxx.

2. Change the implementation method of the following code.
	- arch_alloc_bpf_trampoline
	- arch_free_bpf_trampoline
	Use the BPF core's allocation and free functions.
	
	- bpf_arch_text_invalidate
	Operate with the function larch_insn_text_copy that carries
	memory attribute modifications.

3. Correct the incorrect code formatting.

-----------------------------------------------------------------------
Historical Version:

v1:
Support trampoline for LoongArch. The following feature tests have been
completed:
	1. fentry
	2. fexit
	3. fmod_ret

TODO: The support for the struct_ops feature will be provided in
subsequent patches.

URL for version v1:
https://lore.kernel.org/all/20250611035952.111182-1-duanchenghao@kylinos.cn/
-----------------------------------------------------------------------

Chenghao Duan (4):
  LoongArch: BPF: The operation commands needed to add a trampoline
  LoongArch: BPF: Add bpf_arch_text_poke support for Loongarch
  LoongArch: BPF: Add bpf trampoline support for Loongarch
  LoongArch: BPF: Update the code to rename validate_code to
    validate_ctx.

 arch/loongarch/include/asm/inst.h |   3 +
 arch/loongarch/kernel/inst.c      |  57 ++++
 arch/loongarch/net/bpf_jit.c      | 490 +++++++++++++++++++++++++++++-
 arch/loongarch/net/bpf_jit.h      |   6 +
 4 files changed, 555 insertions(+), 1 deletion(-)

-- 
2.43.0