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([141.11.79.172]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3207eca6eb1sm13701171a91.22.2025.08.05.01.49.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Aug 2025 01:49:33 -0700 (PDT) From: ChenMiao To: Stafford Horne Cc: Linux Kernel , Linux OpenRISC , chenmiao Subject: [PATCH 0/2] Support fixmap and jump_label for openrisc Date: Tue, 5 Aug 2025 08:49:26 +0000 Message-ID: <20250805084926.4125564-1-chenmiao.ku@gmail.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: chenmiao Hello everyone, This implements a basic text patching mechanism and a complete jump_label implementation for OpenRISC. 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. 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. Thanks, Chen Miao chenmiao (2): openrisc: Add text patching API support 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 | 1 + 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 | 68 ++++++++++++++++ arch/openrisc/include/asm/text-patching.h | 13 +++ arch/openrisc/kernel/Makefile | 2 + arch/openrisc/kernel/jump_label.c | 53 +++++++++++++ arch/openrisc/kernel/patching.c | 79 +++++++++++++++++++ arch/openrisc/kernel/setup.c | 2 + arch/openrisc/mm/init.c | 2 +- 14 files changed, 245 insertions(+), 15 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