From: Pekka Enberg <penberg@gmail.com> To: linux-riscv@lists.infradead.org, linux-mm@kvack.org Cc: Pekka Enberg <penberg@kernel.org>, Tom Lendacky <thomas.lendacky@amd.com>, Palmer Dabbelt <palmerdabbelt@google.com>, Mike Rapoport <rppt@linux.ibm.com> Subject: [PATCH v2 1/2] mm: pgtable: Make generic pgprot_* macros available for no-MMU Date: Wed, 15 Jul 2020 08:33:39 +0300 [thread overview] Message-ID: <20200715053340.576300-1-penberg@gmail.com> (raw) From: Pekka Enberg <penberg@kernel.org> The <linux/pgtable.h> header defines some generic pgprot_* implementations, but they are only available when CONFIG_MMU is enabled. The RISC-V architecture, for example, therefore defines some of these pgprot_* macros for !NOMMU. Let's make the pgprot_* generic available even for !NOMMU so we can remove the RISC-V specific definitions. Compile-tested with x86 defconfig, and riscv defconfig and !MMU defconfig. Suggested-by: Palmer Dabbelt <palmerdabbelt@google.com> Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Pekka Enberg <penberg@kernel.org> --- v1 -> v2: Wrap pgprot_modify() -- which is specific to mmap -- with CONFIG_MMU to fix a build issue on ARM reported by kernel test robot <lkp@intel.com>. include/linux/pgtable.h | 71 +++++++++++++++++++++-------------------- 1 file changed, 37 insertions(+), 34 deletions(-) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 56c1e8eb7bb0..53e97da1e8e2 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -647,40 +647,6 @@ static inline int arch_unmap_one(struct mm_struct *mm, #define flush_tlb_fix_spurious_fault(vma, address) flush_tlb_page(vma, address) #endif -#ifndef pgprot_nx -#define pgprot_nx(prot) (prot) -#endif - -#ifndef pgprot_noncached -#define pgprot_noncached(prot) (prot) -#endif - -#ifndef pgprot_writecombine -#define pgprot_writecombine pgprot_noncached -#endif - -#ifndef pgprot_writethrough -#define pgprot_writethrough pgprot_noncached -#endif - -#ifndef pgprot_device -#define pgprot_device pgprot_noncached -#endif - -#ifndef pgprot_modify -#define pgprot_modify pgprot_modify -static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) -{ - if (pgprot_val(oldprot) == pgprot_val(pgprot_noncached(oldprot))) - newprot = pgprot_noncached(newprot); - if (pgprot_val(oldprot) == pgprot_val(pgprot_writecombine(oldprot))) - newprot = pgprot_writecombine(newprot); - if (pgprot_val(oldprot) == pgprot_val(pgprot_device(oldprot))) - newprot = pgprot_device(newprot); - return newprot; -} -#endif - /* * When walking page tables, get the address of the next boundary, * or the end address of the range if that comes earlier. Although no @@ -840,6 +806,43 @@ static inline void ptep_modify_prot_commit(struct vm_area_struct *vma, * No-op macros that just return the current protection value. Defined here * because these macros can be used used even if CONFIG_MMU is not defined. */ + +#ifndef pgprot_nx +#define pgprot_nx(prot) (prot) +#endif + +#ifndef pgprot_noncached +#define pgprot_noncached(prot) (prot) +#endif + +#ifndef pgprot_writecombine +#define pgprot_writecombine pgprot_noncached +#endif + +#ifndef pgprot_writethrough +#define pgprot_writethrough pgprot_noncached +#endif + +#ifndef pgprot_device +#define pgprot_device pgprot_noncached +#endif + +#ifdef CONFIG_MMU +#ifndef pgprot_modify +#define pgprot_modify pgprot_modify +static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) +{ + if (pgprot_val(oldprot) == pgprot_val(pgprot_noncached(oldprot))) + newprot = pgprot_noncached(newprot); + if (pgprot_val(oldprot) == pgprot_val(pgprot_writecombine(oldprot))) + newprot = pgprot_writecombine(newprot); + if (pgprot_val(oldprot) == pgprot_val(pgprot_device(oldprot))) + newprot = pgprot_device(newprot); + return newprot; +} +#endif +#endif /* CONFIG_MMU */ + #ifndef pgprot_encrypted #define pgprot_encrypted(prot) (prot) #endif -- 2.26.2 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
WARNING: multiple messages have this Message-ID (diff)
From: Pekka Enberg <penberg@gmail.com> To: linux-riscv@lists.infradead.org, linux-mm@kvack.org Cc: Pekka Enberg <penberg@kernel.org>, Palmer Dabbelt <palmerdabbelt@google.com>, Mike Rapoport <rppt@linux.ibm.com>, Tom Lendacky <thomas.lendacky@amd.com> Subject: [PATCH v2 1/2] mm: pgtable: Make generic pgprot_* macros available for no-MMU Date: Wed, 15 Jul 2020 08:33:39 +0300 [thread overview] Message-ID: <20200715053340.576300-1-penberg@gmail.com> (raw) From: Pekka Enberg <penberg@kernel.org> The <linux/pgtable.h> header defines some generic pgprot_* implementations, but they are only available when CONFIG_MMU is enabled. The RISC-V architecture, for example, therefore defines some of these pgprot_* macros for !NOMMU. Let's make the pgprot_* generic available even for !NOMMU so we can remove the RISC-V specific definitions. Compile-tested with x86 defconfig, and riscv defconfig and !MMU defconfig. Suggested-by: Palmer Dabbelt <palmerdabbelt@google.com> Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Pekka Enberg <penberg@kernel.org> --- v1 -> v2: Wrap pgprot_modify() -- which is specific to mmap -- with CONFIG_MMU to fix a build issue on ARM reported by kernel test robot <lkp@intel.com>. include/linux/pgtable.h | 71 +++++++++++++++++++++-------------------- 1 file changed, 37 insertions(+), 34 deletions(-) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 56c1e8eb7bb0..53e97da1e8e2 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -647,40 +647,6 @@ static inline int arch_unmap_one(struct mm_struct *mm, #define flush_tlb_fix_spurious_fault(vma, address) flush_tlb_page(vma, address) #endif -#ifndef pgprot_nx -#define pgprot_nx(prot) (prot) -#endif - -#ifndef pgprot_noncached -#define pgprot_noncached(prot) (prot) -#endif - -#ifndef pgprot_writecombine -#define pgprot_writecombine pgprot_noncached -#endif - -#ifndef pgprot_writethrough -#define pgprot_writethrough pgprot_noncached -#endif - -#ifndef pgprot_device -#define pgprot_device pgprot_noncached -#endif - -#ifndef pgprot_modify -#define pgprot_modify pgprot_modify -static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) -{ - if (pgprot_val(oldprot) == pgprot_val(pgprot_noncached(oldprot))) - newprot = pgprot_noncached(newprot); - if (pgprot_val(oldprot) == pgprot_val(pgprot_writecombine(oldprot))) - newprot = pgprot_writecombine(newprot); - if (pgprot_val(oldprot) == pgprot_val(pgprot_device(oldprot))) - newprot = pgprot_device(newprot); - return newprot; -} -#endif - /* * When walking page tables, get the address of the next boundary, * or the end address of the range if that comes earlier. Although no @@ -840,6 +806,43 @@ static inline void ptep_modify_prot_commit(struct vm_area_struct *vma, * No-op macros that just return the current protection value. Defined here * because these macros can be used used even if CONFIG_MMU is not defined. */ + +#ifndef pgprot_nx +#define pgprot_nx(prot) (prot) +#endif + +#ifndef pgprot_noncached +#define pgprot_noncached(prot) (prot) +#endif + +#ifndef pgprot_writecombine +#define pgprot_writecombine pgprot_noncached +#endif + +#ifndef pgprot_writethrough +#define pgprot_writethrough pgprot_noncached +#endif + +#ifndef pgprot_device +#define pgprot_device pgprot_noncached +#endif + +#ifdef CONFIG_MMU +#ifndef pgprot_modify +#define pgprot_modify pgprot_modify +static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) +{ + if (pgprot_val(oldprot) == pgprot_val(pgprot_noncached(oldprot))) + newprot = pgprot_noncached(newprot); + if (pgprot_val(oldprot) == pgprot_val(pgprot_writecombine(oldprot))) + newprot = pgprot_writecombine(newprot); + if (pgprot_val(oldprot) == pgprot_val(pgprot_device(oldprot))) + newprot = pgprot_device(newprot); + return newprot; +} +#endif +#endif /* CONFIG_MMU */ + #ifndef pgprot_encrypted #define pgprot_encrypted(prot) (prot) #endif -- 2.26.2
next reply other threads:[~2020-07-15 5:34 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-15 5:33 Pekka Enberg [this message] 2020-07-15 5:33 ` [PATCH v2 1/2] mm: pgtable: Make generic pgprot_* macros available for no-MMU Pekka Enberg 2020-07-15 5:33 ` [PATCH v2 2/2] riscv: Use generic pgprot_* macros from <linux/pgtable.h> Pekka Enberg 2020-07-15 5:33 ` Pekka Enberg 2020-07-15 17:39 ` [PATCH v2 1/2] mm: pgtable: Make generic pgprot_* macros available for no-MMU David Rientjes 2020-07-15 17:39 ` David Rientjes 2020-07-17 6:14 ` Pekka Enberg 2020-07-17 6:14 ` Pekka Enberg 2020-07-22 3:29 ` Palmer Dabbelt 2020-07-22 3:29 ` Palmer Dabbelt
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20200715053340.576300-1-penberg@gmail.com \ --to=penberg@gmail.com \ --cc=linux-mm@kvack.org \ --cc=linux-riscv@lists.infradead.org \ --cc=palmerdabbelt@google.com \ --cc=penberg@kernel.org \ --cc=rppt@linux.ibm.com \ --cc=thomas.lendacky@amd.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.