There are numerous systems in the kernel that rely on directly modifying, creating, and reading instructions. Many of these systems have rewritten code to do this. This patch will delegate all instruction handling into insn.h and reg.h. All of the compressed instructions, RVI, Zicsr, M, A instructions are included, as well as a subset of the F,D,Q extensions. --- This is modifying code that https://lore.kernel.org/lkml/20230731183925.152145-1-namcaov@xxxxxxxxx/ is also touching. --- Testing: There are a lot of subsystems touched and I have not tested every individual instruction. I did a lot of copy-pasting from the RISC-V spec so opcodes and such should be correct, but the construction of every instruction is not fully tested. vector: Compiled and booted jump_label: Ensured static keys function as expected. kgdb: Attempted to run the provided tests but they failed even without my changes module: Loaded and unloaded modules patch.c: Ensured kernel booted kprobes: Used a kprobing module to probe jalr, auipc, and branch instructions nommu misaligned addresses: Kernel boots kvm: Ran KVM selftests bpf: Kernel boots. Most of the instructions are exclusively used by BPF but I am unsure of the best way of testing BPF. Signed-off-by: Charlie Jenkins <charlie@xxxxxxxxxxxx> --- Charlie Jenkins (10): RISC-V: Expand instruction definitions RISC-V: vector: Refactor instructions RISC-V: Refactor jump label instructions RISC-V: KGDB: Refactor instructions RISC-V: module: Refactor instructions RISC-V: Refactor patch instructions RISC-V: nommu: Refactor instructions RISC-V: kvm: Refactor instructions RISC-V: bpf: Refactor instructions RISC-V: Refactor bug and traps instructions arch/riscv/include/asm/bug.h | 18 +- arch/riscv/include/asm/insn.h | 2744 +++++++++++++++++++++++++++--- arch/riscv/include/asm/reg.h | 88 + arch/riscv/kernel/jump_label.c | 13 +- arch/riscv/kernel/kgdb.c | 13 +- arch/riscv/kernel/module.c | 80 +- arch/riscv/kernel/patch.c | 3 +- arch/riscv/kernel/probes/kprobes.c | 13 +- arch/riscv/kernel/probes/simulate-insn.c | 100 +- arch/riscv/kernel/probes/uprobes.c | 5 +- arch/riscv/kernel/traps.c | 9 +- arch/riscv/kernel/traps_misaligned.c | 218 +-- arch/riscv/kernel/vector.c | 5 +- arch/riscv/kvm/vcpu_insn.c | 281 +-- arch/riscv/net/bpf_jit.h | 707 +------- 15 files changed, 2825 insertions(+), 1472 deletions(-) --- base-commit: 5d0c230f1de8c7515b6567d9afba1f196fb4e2f4 change-id: 20230801-master-refactor-instructions-v4-433aa040da03 -- - Charlie
