From: Alexandre Ghiti <alex@ghiti.fr> To: Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Jisheng Zhang <jszhang@kernel.org>, Christoph Hellwig <hch@infradead.org>, Zong Li <zong.li@sifive.com>, Anup Patel <anup@brainfault.org>, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Alexandre Ghiti <alex@ghiti.fr> Subject: [PATCH v3 0/3] riscv: Map the kernel with correct permissions the first time Date: Thu, 3 Jun 2021 10:27:46 +0200 [thread overview] Message-ID: <20210603082749.1256129-1-alex@ghiti.fr> (raw) The kernel permissions are fixed after the kernel page table is created: fix that by mapping the kernel 'correctly' the first time. Patch 1 is a cleanup patch on which the next patches are based on, not necessary for this patchset though. Patch 2 introduces a new helper to set kernel mapping permissions while avoiding all the casts when using set_memory_* API. Patch 3 is the bulk of this work and deals with mapping the kernel with the right permissions. Changes in v3: * Add a patch that factorizes kernel address conversions * Add a helper called set_kernel_memory in its own patch, as suggested by Christoph * Prefer IS_ENABLED over #ifdef, as suggested by Christoph * Split overly long lines, as suggested by Christoph * Simplify kernel mapping by mapping ALL text as readonly and taking advantage of already present code that enables write for init text before free_initmem_default. Changes in v2: * Rebased on top of for-next (and "riscv: mm: fix build errors caused by mk_pmd()") * Get rid of protect_kernel_linear_mapping_text_rodata as suggested by Jisheng * Improve code in general compared to previous RFC Alexandre Ghiti (3): riscv: Factorize xip and !xip kernel address conversion macros riscv: Introduce set_kernel_memory helper riscv: Map the kernel with correct permissions the first time arch/riscv/include/asm/page.h | 27 ++++---- arch/riscv/include/asm/pgtable.h | 2 + arch/riscv/include/asm/sections.h | 17 +++++ arch/riscv/include/asm/set_memory.h | 13 ++-- arch/riscv/kernel/setup.c | 11 +-- arch/riscv/mm/init.c | 102 ++++++++++++---------------- arch/riscv/mm/pageattr.c | 10 +++ 7 files changed, 95 insertions(+), 87 deletions(-) -- 2.30.2
WARNING: multiple messages have this Message-ID (diff)
From: Alexandre Ghiti <alex@ghiti.fr> To: Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Jisheng Zhang <jszhang@kernel.org>, Christoph Hellwig <hch@infradead.org>, Zong Li <zong.li@sifive.com>, Anup Patel <anup@brainfault.org>, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Alexandre Ghiti <alex@ghiti.fr> Subject: [PATCH v3 0/3] riscv: Map the kernel with correct permissions the first time Date: Thu, 3 Jun 2021 10:27:46 +0200 [thread overview] Message-ID: <20210603082749.1256129-1-alex@ghiti.fr> (raw) The kernel permissions are fixed after the kernel page table is created: fix that by mapping the kernel 'correctly' the first time. Patch 1 is a cleanup patch on which the next patches are based on, not necessary for this patchset though. Patch 2 introduces a new helper to set kernel mapping permissions while avoiding all the casts when using set_memory_* API. Patch 3 is the bulk of this work and deals with mapping the kernel with the right permissions. Changes in v3: * Add a patch that factorizes kernel address conversions * Add a helper called set_kernel_memory in its own patch, as suggested by Christoph * Prefer IS_ENABLED over #ifdef, as suggested by Christoph * Split overly long lines, as suggested by Christoph * Simplify kernel mapping by mapping ALL text as readonly and taking advantage of already present code that enables write for init text before free_initmem_default. Changes in v2: * Rebased on top of for-next (and "riscv: mm: fix build errors caused by mk_pmd()") * Get rid of protect_kernel_linear_mapping_text_rodata as suggested by Jisheng * Improve code in general compared to previous RFC Alexandre Ghiti (3): riscv: Factorize xip and !xip kernel address conversion macros riscv: Introduce set_kernel_memory helper riscv: Map the kernel with correct permissions the first time arch/riscv/include/asm/page.h | 27 ++++---- arch/riscv/include/asm/pgtable.h | 2 + arch/riscv/include/asm/sections.h | 17 +++++ arch/riscv/include/asm/set_memory.h | 13 ++-- arch/riscv/kernel/setup.c | 11 +-- arch/riscv/mm/init.c | 102 ++++++++++++---------------- arch/riscv/mm/pageattr.c | 10 +++ 7 files changed, 95 insertions(+), 87 deletions(-) -- 2.30.2 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
next reply other threads:[~2021-06-03 8:27 UTC|newest] Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-03 8:27 Alexandre Ghiti [this message] 2021-06-03 8:27 ` [PATCH v3 0/3] riscv: Map the kernel with correct permissions the first time Alexandre Ghiti 2021-06-03 8:27 ` [PATCH v3 1/3] riscv: Factorize xip and !xip kernel address conversion macros Alexandre Ghiti 2021-06-03 8:27 ` Alexandre Ghiti 2021-06-03 11:39 ` Anup Patel 2021-06-03 11:39 ` Anup Patel 2021-06-03 12:27 ` Jisheng Zhang 2021-06-03 12:27 ` Jisheng Zhang 2021-06-03 12:49 ` Jisheng Zhang 2021-06-03 12:49 ` Jisheng Zhang 2021-06-03 15:51 ` Vitaly Wool 2021-06-03 15:51 ` Vitaly Wool 2021-06-03 15:49 ` Jisheng Zhang 2021-06-03 15:49 ` Jisheng Zhang 2021-06-03 12:57 ` Alex Ghiti 2021-06-03 12:57 ` Alex Ghiti 2021-06-03 13:16 ` Anup Patel 2021-06-03 13:16 ` Anup Patel 2021-06-03 13:53 ` Jisheng Zhang 2021-06-03 13:53 ` Jisheng Zhang 2021-06-03 15:06 ` Alex Ghiti 2021-06-03 15:06 ` Alex Ghiti 2021-06-03 15:16 ` Jisheng Zhang 2021-06-03 15:16 ` Jisheng Zhang 2021-06-03 8:27 ` [PATCH v3 2/3] riscv: Introduce set_kernel_memory helper Alexandre Ghiti 2021-06-03 8:27 ` Alexandre Ghiti 2021-06-03 11:35 ` Anup Patel 2021-06-03 11:35 ` Anup Patel 2021-06-03 8:27 ` [PATCH v3 3/3] riscv: Map the kernel with correct permissions the first time Alexandre Ghiti 2021-06-03 8:27 ` Alexandre Ghiti 2021-06-03 11:45 ` Anup Patel 2021-06-03 11:45 ` Anup Patel
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