From: Jisheng Zhang <jszhang@kernel.org> To: Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu> Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de>, Samuel Holland <samuel.holland@sifive.com>, Alexandre Ghiti <alexghiti@rivosinc.com> Subject: [PATCH v2 RESEND] riscv: mm: implement pgprot_nx Date: Mon, 25 Mar 2024 18:54:56 +0800 [thread overview] Message-ID: <20240325105456.1338-1-jszhang@kernel.org> (raw) commit cca98e9f8b5e ("mm: enforce that vmap can't map pages executable") enforces the W^X protection by not allowing remapping existing pages as executable. Add riscv bits so that riscv can benefit the same protection. Signed-off-by: Jisheng Zhang <jszhang@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Samuel Holland <samuel.holland@sifive.com> Tested-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> --- Hi Palmer, This patch missed two merge window, I.E 6.8-rc1 and 6.9-rc1, I'm not sure whether there's something to be done from my side. Thanks in advance since v1: - rebase on v6.8-rc1 - collect Reviewed-by and Tested-by tag arch/riscv/include/asm/pgtable.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 97fcde30e247..9f8ea0e33eb1 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -593,6 +593,12 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma, return ptep_test_and_clear_young(vma, address, ptep); } +#define pgprot_nx pgprot_nx +static inline pgprot_t pgprot_nx(pgprot_t _prot) +{ + return __pgprot(pgprot_val(_prot) & ~_PAGE_EXEC); +} + #define pgprot_noncached pgprot_noncached static inline pgprot_t pgprot_noncached(pgprot_t _prot) { -- 2.43.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
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From: Jisheng Zhang <jszhang@kernel.org> To: Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu> Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de>, Samuel Holland <samuel.holland@sifive.com>, Alexandre Ghiti <alexghiti@rivosinc.com> Subject: [PATCH v2 RESEND] riscv: mm: implement pgprot_nx Date: Mon, 25 Mar 2024 18:54:56 +0800 [thread overview] Message-ID: <20240325105456.1338-1-jszhang@kernel.org> (raw) commit cca98e9f8b5e ("mm: enforce that vmap can't map pages executable") enforces the W^X protection by not allowing remapping existing pages as executable. Add riscv bits so that riscv can benefit the same protection. Signed-off-by: Jisheng Zhang <jszhang@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Samuel Holland <samuel.holland@sifive.com> Tested-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> --- Hi Palmer, This patch missed two merge window, I.E 6.8-rc1 and 6.9-rc1, I'm not sure whether there's something to be done from my side. Thanks in advance since v1: - rebase on v6.8-rc1 - collect Reviewed-by and Tested-by tag arch/riscv/include/asm/pgtable.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 97fcde30e247..9f8ea0e33eb1 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -593,6 +593,12 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma, return ptep_test_and_clear_young(vma, address, ptep); } +#define pgprot_nx pgprot_nx +static inline pgprot_t pgprot_nx(pgprot_t _prot) +{ + return __pgprot(pgprot_val(_prot) & ~_PAGE_EXEC); +} + #define pgprot_noncached pgprot_noncached static inline pgprot_t pgprot_noncached(pgprot_t _prot) { -- 2.43.0
next reply other threads:[~2024-03-25 11:08 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-25 10:54 Jisheng Zhang [this message] 2024-03-25 10:54 ` [PATCH v2 RESEND] riscv: mm: implement pgprot_nx Jisheng Zhang 2024-04-04 19:40 ` patchwork-bot+linux-riscv 2024-04-04 19:40 ` patchwork-bot+linux-riscv
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