I have queued this for 6.18 now. -Stafford
On Fri, Sep 05, 2025 at 06:12:54PM +0000, ChenMiao wrote: > From: chenmiao <chenmiao...@gmail.com> > > Hello everyone, > > This implements a basic text patching mechanism and a complete jump_label > implementation for OpenRISC. It should be noted that the jump_label have > passed testing. > > 1. Implement the patch_map interface and the patch_insn_write single insn > write API by providing FIX_TEXT_POKE0. And create a new insn-def.h to record > openrisc's instruction macro definition which only have OPENRISC_INSN_SIZE > now. > > 2. Support for the R_OR1K_32_PCREL relocation type is added for module > insertion, > enabling subsequent jump_label selftest module insertion. > > 3. Regenerate defconfigs for or1ksim_defconfig and virt_defconfig. > > 4. Based on the previously implemented patch_insn_write, achieve a complete > jump_label implementation, directly supporting > arch_jump_label_transform_queue. > And add a new macro OPENRISC_INSN_NOP in insn-def.h. > > Link: > https://lore.kernel.org/openrisc/CAKxVwgdGe59F=giPXsukmQDO=XY58BH2gAMCV6uCR=vmwka...@mail.gmail.com/T/#t > > Thanks, > > Chen Miao > > --- > Changes in V5: > - Simplified some code in the fourth patch and removed unnecessary braces. > > Changes in V4: > - Added testing for jump_label > - Split part of the jump_label patch content to form the third patch > - Implemented R_OR1K_32_PCREL module support for jump_label testing > > Changes in V3: > - Removed the is_exit_text used, added some necessary comments. > - Modify some macro like __ASSEMBLY__ to __ASSEMBLER__ and ensure the > defconfig by make savedefconfig. > > Changes in V2: > - Add a new insn-def.h to record the insn macro. > - Modify the patch_insn_write API from const void* to u32 insn. > - Using the modified patch_insn_write API in > arch_jump_label_transform_queue. > > chenmiao (4): > openrisc: Add text patching API support > openrisc: Add R_OR1K_32_PCREL relocation type module support > openrisc: Regenerate defconfigs. > openrisc: Add jump label support > > .../core/jump-labels/arch-support.txt | 2 +- > arch/openrisc/Kconfig | 2 + > arch/openrisc/configs/or1ksim_defconfig | 19 ++--- > arch/openrisc/configs/virt_defconfig | 2 +- > arch/openrisc/include/asm/Kbuild | 1 - > arch/openrisc/include/asm/fixmap.h | 1 + > arch/openrisc/include/asm/insn-def.h | 15 ++++ > arch/openrisc/include/asm/jump_label.h | 72 +++++++++++++++++ > arch/openrisc/include/asm/text-patching.h | 13 +++ > arch/openrisc/kernel/Makefile | 2 + > arch/openrisc/kernel/jump_label.c | 51 ++++++++++++ > arch/openrisc/kernel/module.c | 4 + > arch/openrisc/kernel/patching.c | 79 +++++++++++++++++++ > arch/openrisc/kernel/setup.c | 2 + > arch/openrisc/mm/init.c | 6 +- > 15 files changed, 255 insertions(+), 16 deletions(-) > create mode 100644 arch/openrisc/include/asm/insn-def.h > create mode 100644 arch/openrisc/include/asm/jump_label.h > create mode 100644 arch/openrisc/include/asm/text-patching.h > create mode 100644 arch/openrisc/kernel/jump_label.c > create mode 100644 arch/openrisc/kernel/patching.c > > -- > 2.45.2 >
