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Date: Tue, 31 Jul 2018 13:17:03 +0200
From: Alexandre Ghiti <alex@...ti.fr>
To: Michael Ellerman <mpe@...erman.id.au>, linux-mm@...ck.org,
mike.kravetz@...cle.com, linux@...linux.org.uk,
catalin.marinas@....com, will.deacon@....com, tony.luck@...el.com,
fenghua.yu@...el.com, ralf@...ux-mips.org, paul.burton@...s.com,
jhogan@...nel.org, jejb@...isc-linux.org, deller@....de,
benh@...nel.crashing.org, ysato@...rs.sourceforge.jp,
dalias@...c.org, davem@...emloft.net, tglx@...utronix.de,
mingo@...hat.com, hpa@...or.com, x86@...nel.org, arnd@...db.de,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-ia64@...r.kernel.org, linux-mips@...ux-mips.org,
linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
linux-arch@...r.kernel.org,
"aneesh.kumar@...ux.ibm.com" <aneesh.kumar@...ux.ibm.com>
Subject: Re: [PATCH v5 09/11] hugetlb: Introduce generic version of
huge_ptep_set_wrprotect
On 07/31/2018 12:06 PM, Michael Ellerman wrote:
> Alexandre Ghiti <alex@...ti.fr> 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 <alex@...ti.fr>
>> Reviewed-by: Mike Kravetz <mike.kravetz@...cle.com>
>> ---
>> 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
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