diff options
| author | Alexandre Ghiti <alexghiti@rivosinc.com> | 2024-02-29 13:10:56 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-04-16 18:27:47 -0700 |
| commit | c97bf629963e52b205ed5fbaf151e5bd342f9c63 (patch) | |
| tree | 87bc3f31fc0badf08ea02ae6516ad49055cdcf6c /arch/riscv/include | |
| parent | 29cee75fb66e6f2845360e0598974253bf79181a (diff) | |
riscv: Fix text patching when IPI are used
For now, we use stop_machine() to patch the text and when we use IPIs for
remote icache flushes (which is emitted in patch_text_nosync()), the system
hangs.
So instead, make sure every CPU executes the stop_machine() patching
function and emit a local icache flush there.
Co-developed-by: Björn Töpel <bjorn@rivosinc.com>
Signed-off-by: Björn Töpel <bjorn@rivosinc.com>
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Andrea Parri <parri.andrea@gmail.com>
Link: https://lore.kernel.org/r/20240229121056.203419-3-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/patch.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/patch.h b/arch/riscv/include/asm/patch.h index e88b52d39eac..9f5d6e14c405 100644 --- a/arch/riscv/include/asm/patch.h +++ b/arch/riscv/include/asm/patch.h @@ -6,6 +6,7 @@ #ifndef _ASM_RISCV_PATCH_H #define _ASM_RISCV_PATCH_H +int patch_insn_write(void *addr, const void *insn, size_t len); int patch_text_nosync(void *addr, const void *insns, size_t len); int patch_text_set_nosync(void *addr, u8 c, size_t len); int patch_text(void *addr, u32 *insns, int ninsns); |