From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) by kanga.kvack.org (Postfix) with ESMTP id 70BE66B000D for ; Tue, 31 Jul 2018 07:19:00 -0400 (EDT) Received: by mail-wr1-f69.google.com with SMTP id t10-v6so11567142wrs.17 for ; Tue, 31 Jul 2018 04:19:00 -0700 (PDT) Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net. [217.70.183.194]) by mx.google.com with ESMTPS id e26-v6si4274427wra.250.2018.07.31.04.18.58 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 31 Jul 2018 04:18:58 -0700 (PDT) Subject: Re: [PATCH v5 09/11] hugetlb: Introduce generic version of huge_ptep_set_wrprotect References: <20180731060155.16915-1-alex@ghiti.fr> <20180731060155.16915-10-alex@ghiti.fr> <87h8kfhg7o.fsf@concordia.ellerman.id.au> From: Alexandre Ghiti Message-ID: <6acb1389-6998-bafb-cf69-174fd522c04c@ghiti.fr> Date: Tue, 31 Jul 2018 13:17:03 +0200 MIME-Version: 1.0 In-Reply-To: <87h8kfhg7o.fsf@concordia.ellerman.id.au> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: owner-linux-mm@kvack.org List-ID: To: Michael Ellerman , linux-mm@kvack.org, mike.kravetz@oracle.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, tony.luck@intel.com, fenghua.yu@intel.com, ralf@linux-mips.org, paul.burton@mips.com, jhogan@kernel.org, jejb@parisc-linux.org, deller@gmx.de, benh@kernel.crashing.org, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, arnd@arndb.de, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@linux-mips.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, "aneesh.kumar@linux.ibm.com" On 07/31/2018 12:06 PM, Michael Ellerman wrote: > Alexandre Ghiti writes: > >> arm, ia64, mips, sh, x86 architectures use the same version >> of huge_ptep_set_wrprotect, so move this generic implementation into >> asm-generic/hugetlb.h. >> Note: powerpc uses twice for book3s/32 and nohash/32 the same version as >> the above architectures, but the modification was not straightforward >> and hence has not been done. > Do you remember what the problem was there? > > It looks like you should just be able to drop them like the others. I > assume there's some header spaghetti that causes problems though? Yes, the header spaghetti frightened me a bit. Maybe I should have tried harder: I can try to remove them and find the right defconfigs to compile both to begin with. And to guarantee the functionality is preserved, can I use the testsuite of libhugetlbfs with qemu ? Alex > > cheers > > >> Signed-off-by: Alexandre Ghiti >> Reviewed-by: Mike Kravetz >> --- >> arch/arm/include/asm/hugetlb-3level.h | 6 ------ >> arch/arm64/include/asm/hugetlb.h | 1 + >> arch/ia64/include/asm/hugetlb.h | 6 ------ >> arch/mips/include/asm/hugetlb.h | 6 ------ >> arch/parisc/include/asm/hugetlb.h | 1 + >> arch/powerpc/include/asm/book3s/32/pgtable.h | 2 ++ >> arch/powerpc/include/asm/book3s/64/pgtable.h | 1 + >> arch/powerpc/include/asm/nohash/32/pgtable.h | 2 ++ >> arch/powerpc/include/asm/nohash/64/pgtable.h | 1 + >> arch/sh/include/asm/hugetlb.h | 6 ------ >> arch/sparc/include/asm/hugetlb.h | 1 + >> arch/x86/include/asm/hugetlb.h | 6 ------ >> include/asm-generic/hugetlb.h | 8 ++++++++ >> 13 files changed, 17 insertions(+), 30 deletions(-) >> >> diff --git a/arch/arm/include/asm/hugetlb-3level.h b/arch/arm/include/asm/hugetlb-3level.h >> index b897541520ef..8247cd6a2ac6 100644 >> --- a/arch/arm/include/asm/hugetlb-3level.h >> +++ b/arch/arm/include/asm/hugetlb-3level.h >> @@ -37,12 +37,6 @@ static inline pte_t huge_ptep_get(pte_t *ptep) >> return retval; >> } >> >> -static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, >> - unsigned long addr, pte_t *ptep) >> -{ >> - ptep_set_wrprotect(mm, addr, ptep); >> -} >> - >> static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, >> unsigned long addr, pte_t *ptep, >> pte_t pte, int dirty) >> diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h >> index 3e7f6e69b28d..f4f69ae5466e 100644 >> --- a/arch/arm64/include/asm/hugetlb.h >> +++ b/arch/arm64/include/asm/hugetlb.h >> @@ -48,6 +48,7 @@ extern int huge_ptep_set_access_flags(struct vm_area_struct *vma, >> #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR >> extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm, >> unsigned long addr, pte_t *ptep); >> +#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT >> extern void huge_ptep_set_wrprotect(struct mm_struct *mm, >> unsigned long addr, pte_t *ptep); >> #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH >> diff --git a/arch/ia64/include/asm/hugetlb.h b/arch/ia64/include/asm/hugetlb.h >> index cbe296271030..49d1f7949f3a 100644 >> --- a/arch/ia64/include/asm/hugetlb.h >> +++ b/arch/ia64/include/asm/hugetlb.h >> @@ -27,12 +27,6 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, >> { >> } >> >> -static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, >> - unsigned long addr, pte_t *ptep) >> -{ >> - ptep_set_wrprotect(mm, addr, ptep); >> -} >> - >> static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, >> unsigned long addr, pte_t *ptep, >> pte_t pte, int dirty) >> diff --git a/arch/mips/include/asm/hugetlb.h b/arch/mips/include/asm/hugetlb.h >> index 6ff2531cfb1d..3dcf5debf8c4 100644 >> --- a/arch/mips/include/asm/hugetlb.h >> +++ b/arch/mips/include/asm/hugetlb.h >> @@ -63,12 +63,6 @@ static inline int huge_pte_none(pte_t pte) >> return !val || (val == (unsigned long)invalid_pte_table); >> } >> >> -static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, >> - unsigned long addr, pte_t *ptep) >> -{ >> - ptep_set_wrprotect(mm, addr, ptep); >> -} >> - >> static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, >> unsigned long addr, >> pte_t *ptep, pte_t pte, >> diff --git a/arch/parisc/include/asm/hugetlb.h b/arch/parisc/include/asm/hugetlb.h >> index fb7e0fd858a3..9c3950ca2974 100644 >> --- a/arch/parisc/include/asm/hugetlb.h >> +++ b/arch/parisc/include/asm/hugetlb.h >> @@ -39,6 +39,7 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, >> { >> } >> >> +#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT >> void huge_ptep_set_wrprotect(struct mm_struct *mm, >> unsigned long addr, pte_t *ptep); >> >> diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h >> index 02f5acd7ccc4..d2cd1d0226e9 100644 >> --- a/arch/powerpc/include/asm/book3s/32/pgtable.h >> +++ b/arch/powerpc/include/asm/book3s/32/pgtable.h >> @@ -228,6 +228,8 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, >> { >> pte_update(ptep, (_PAGE_RW | _PAGE_HWWRITE), _PAGE_RO); >> } >> + >> +#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT >> static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, >> unsigned long addr, pte_t *ptep) >> { >> diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h >> index 42aafba7a308..7d957f7c47cd 100644 >> --- a/arch/powerpc/include/asm/book3s/64/pgtable.h >> +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h >> @@ -451,6 +451,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, >> pte_update(mm, addr, ptep, 0, _PAGE_PRIVILEGED, 0); >> } >> >> +#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT >> static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, >> unsigned long addr, pte_t *ptep) >> { >> diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h >> index 7c46a98cc7f4..f39e200d9591 100644 >> --- a/arch/powerpc/include/asm/nohash/32/pgtable.h >> +++ b/arch/powerpc/include/asm/nohash/32/pgtable.h >> @@ -249,6 +249,8 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, >> { >> pte_update(ptep, (_PAGE_RW | _PAGE_HWWRITE), _PAGE_RO); >> } >> + >> +#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT >> static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, >> unsigned long addr, pte_t *ptep) >> { >> diff --git a/arch/powerpc/include/asm/nohash/64/pgtable.h b/arch/powerpc/include/asm/nohash/64/pgtable.h >> index dd0c7236208f..69fbf7e9b4db 100644 >> --- a/arch/powerpc/include/asm/nohash/64/pgtable.h >> +++ b/arch/powerpc/include/asm/nohash/64/pgtable.h >> @@ -238,6 +238,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, >> pte_update(mm, addr, ptep, _PAGE_RW, 0, 0); >> } >> >> +#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT >> static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, >> unsigned long addr, pte_t *ptep) >> { >> diff --git a/arch/sh/include/asm/hugetlb.h b/arch/sh/include/asm/hugetlb.h >> index f1bbd255ee43..8df4004977b9 100644 >> --- a/arch/sh/include/asm/hugetlb.h >> +++ b/arch/sh/include/asm/hugetlb.h >> @@ -32,12 +32,6 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, >> { >> } >> >> -static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, >> - unsigned long addr, pte_t *ptep) >> -{ >> - ptep_set_wrprotect(mm, addr, ptep); >> -} >> - >> static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, >> unsigned long addr, pte_t *ptep, >> pte_t pte, int dirty) >> diff --git a/arch/sparc/include/asm/hugetlb.h b/arch/sparc/include/asm/hugetlb.h >> index 2101ea217f33..c41754a113f3 100644 >> --- a/arch/sparc/include/asm/hugetlb.h >> +++ b/arch/sparc/include/asm/hugetlb.h >> @@ -32,6 +32,7 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, >> { >> } >> >> +#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT >> static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, >> unsigned long addr, pte_t *ptep) >> { >> diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h >> index 59c056adb3c9..a3f781f7a264 100644 >> --- a/arch/x86/include/asm/hugetlb.h >> +++ b/arch/x86/include/asm/hugetlb.h >> @@ -13,12 +13,6 @@ static inline int is_hugepage_only_range(struct mm_struct *mm, >> return 0; >> } >> >> -static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, >> - unsigned long addr, pte_t *ptep) >> -{ >> - ptep_set_wrprotect(mm, addr, ptep); >> -} >> - >> static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, >> unsigned long addr, pte_t *ptep, >> pte_t pte, int dirty) >> diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h >> index 6c0c8b0c71e0..9b9039845278 100644 >> --- a/include/asm-generic/hugetlb.h >> +++ b/include/asm-generic/hugetlb.h >> @@ -102,4 +102,12 @@ static inline int prepare_hugepage_range(struct file *file, >> } >> #endif >> >> +#ifndef __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT >> +static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, >> + unsigned long addr, pte_t *ptep) >> +{ >> + ptep_set_wrprotect(mm, addr, ptep); >> +} >> +#endif >> + >> #endif /* _ASM_GENERIC_HUGETLB_H */ >> -- >> 2.16.2