diff mbox series

[4/6] csky/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT

Message ID 20220603101411.488970-5-anshuman.khandual@arm.com (mailing list archive)
State Handled Elsewhere
Headers show
Series mm/mmap: Enable more platforms with ARCH_HAS_VM_GET_PAGE_PROT | expand

Commit Message

Anshuman Khandual June 3, 2022, 10:14 a.m. UTC
This defines and exports a platform specific custom vm_get_page_prot() via
subscribing ARCH_HAS_VM_GET_PAGE_PROT. Subsequently all __SXXX and __PXXX
macros can be dropped which are no longer needed.

Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-csky@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 arch/csky/Kconfig               |  1 +
 arch/csky/include/asm/pgtable.h | 18 ------------------
 arch/csky/mm/init.c             | 32 ++++++++++++++++++++++++++++++++
 3 files changed, 33 insertions(+), 18 deletions(-)

Comments

Guo Ren June 4, 2022, 12:13 p.m. UTC | #1
Acked-by: Guo Ren <guoren@kernel.org>

On Fri, Jun 3, 2022 at 6:15 PM Anshuman Khandual
<anshuman.khandual@arm.com> wrote:
>
> This defines and exports a platform specific custom vm_get_page_prot() via
> subscribing ARCH_HAS_VM_GET_PAGE_PROT. Subsequently all __SXXX and __PXXX
> macros can be dropped which are no longer needed.
>
> Cc: Geert Uytterhoeven <geert@linux-m68k.org>
> Cc: linux-csky@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Acked-by: Guo Ren <guoren@kernel.org>
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
> ---
>  arch/csky/Kconfig               |  1 +
>  arch/csky/include/asm/pgtable.h | 18 ------------------
>  arch/csky/mm/init.c             | 32 ++++++++++++++++++++++++++++++++
>  3 files changed, 33 insertions(+), 18 deletions(-)
>
> diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
> index 21d72b078eef..588b8a9c68ed 100644
> --- a/arch/csky/Kconfig
> +++ b/arch/csky/Kconfig
> @@ -6,6 +6,7 @@ config CSKY
>         select ARCH_HAS_GCOV_PROFILE_ALL
>         select ARCH_HAS_SYNC_DMA_FOR_CPU
>         select ARCH_HAS_SYNC_DMA_FOR_DEVICE
> +       select ARCH_HAS_VM_GET_PAGE_PROT
>         select ARCH_USE_BUILTIN_BSWAP
>         select ARCH_USE_QUEUED_RWLOCKS
>         select ARCH_WANT_FRAME_POINTERS if !CPU_CK610 && $(cc-option,-mbacktrace)
> diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h
> index bbe245117777..229a5f4ad7fc 100644
> --- a/arch/csky/include/asm/pgtable.h
> +++ b/arch/csky/include/asm/pgtable.h
> @@ -77,24 +77,6 @@
>  #define MAX_SWAPFILES_CHECK() \
>                 BUILD_BUG_ON(MAX_SWAPFILES_SHIFT != 5)
>
> -#define __P000 PAGE_NONE
> -#define __P001 PAGE_READ
> -#define __P010 PAGE_READ
> -#define __P011 PAGE_READ
> -#define __P100 PAGE_READ
> -#define __P101 PAGE_READ
> -#define __P110 PAGE_READ
> -#define __P111 PAGE_READ
> -
> -#define __S000 PAGE_NONE
> -#define __S001 PAGE_READ
> -#define __S010 PAGE_WRITE
> -#define __S011 PAGE_WRITE
> -#define __S100 PAGE_READ
> -#define __S101 PAGE_READ
> -#define __S110 PAGE_WRITE
> -#define __S111 PAGE_WRITE
> -
>  extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
>  #define ZERO_PAGE(vaddr)       (virt_to_page(empty_zero_page))
>
> diff --git a/arch/csky/mm/init.c b/arch/csky/mm/init.c
> index bf2004aa811a..f9babbed17d4 100644
> --- a/arch/csky/mm/init.c
> +++ b/arch/csky/mm/init.c
> @@ -197,3 +197,35 @@ void __init fixaddr_init(void)
>         vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
>         fixrange_init(vaddr, vaddr + PMD_SIZE, swapper_pg_dir);
>  }
> +
> +pgprot_t vm_get_page_prot(unsigned long vm_flags)
> +{
> +       switch (vm_flags & (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)) {
> +       case VM_NONE:
> +               return PAGE_NONE;
> +       case VM_READ:
> +       case VM_WRITE:
> +       case VM_WRITE | VM_READ:
> +       case VM_EXEC:
> +       case VM_EXEC | VM_READ:
> +       case VM_EXEC | VM_WRITE:
> +       case VM_EXEC | VM_WRITE | VM_READ:
> +               return PAGE_READ;
> +       case VM_SHARED:
> +               return PAGE_NONE;
> +       case VM_SHARED | VM_READ:
> +               return PAGE_READ;
> +       case VM_SHARED | VM_WRITE:
> +       case VM_SHARED | VM_WRITE | VM_READ:
> +               return PAGE_WRITE;
> +       case VM_SHARED | VM_EXEC:
> +       case VM_SHARED | VM_EXEC | VM_READ:
> +               return PAGE_READ;
> +       case VM_SHARED | VM_EXEC | VM_WRITE:
> +       case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ:
> +               return PAGE_WRITE;
> +       default:
> +               BUILD_BUG();
> +       }
> +}
> +EXPORT_SYMBOL(vm_get_page_prot);
> --
> 2.25.1
>
Anshuman Khandual June 5, 2022, 9:50 a.m. UTC | #2
On 6/4/22 17:43, Guo Ren wrote:
> Acked-by: Guo Ren <guoren@kernel.org>

I will resend this series with suggested changes.

> 
> On Fri, Jun 3, 2022 at 6:15 PM Anshuman Khandual
> <anshuman.khandual@arm.com> wrote:
>>
>> This defines and exports a platform specific custom vm_get_page_prot() via
>> subscribing ARCH_HAS_VM_GET_PAGE_PROT. Subsequently all __SXXX and __PXXX
>> macros can be dropped which are no longer needed.
>>
>> Cc: Geert Uytterhoeven <geert@linux-m68k.org>
>> Cc: linux-csky@vger.kernel.org
>> Cc: linux-kernel@vger.kernel.org
>> Acked-by: Guo Ren <guoren@kernel.org>
>> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
>> ---
>>  arch/csky/Kconfig               |  1 +
>>  arch/csky/include/asm/pgtable.h | 18 ------------------
>>  arch/csky/mm/init.c             | 32 ++++++++++++++++++++++++++++++++
>>  3 files changed, 33 insertions(+), 18 deletions(-)
>>
>> diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
>> index 21d72b078eef..588b8a9c68ed 100644
>> --- a/arch/csky/Kconfig
>> +++ b/arch/csky/Kconfig
>> @@ -6,6 +6,7 @@ config CSKY
>>         select ARCH_HAS_GCOV_PROFILE_ALL
>>         select ARCH_HAS_SYNC_DMA_FOR_CPU
>>         select ARCH_HAS_SYNC_DMA_FOR_DEVICE
>> +       select ARCH_HAS_VM_GET_PAGE_PROT
>>         select ARCH_USE_BUILTIN_BSWAP
>>         select ARCH_USE_QUEUED_RWLOCKS
>>         select ARCH_WANT_FRAME_POINTERS if !CPU_CK610 && $(cc-option,-mbacktrace)
>> diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h
>> index bbe245117777..229a5f4ad7fc 100644
>> --- a/arch/csky/include/asm/pgtable.h
>> +++ b/arch/csky/include/asm/pgtable.h
>> @@ -77,24 +77,6 @@
>>  #define MAX_SWAPFILES_CHECK() \
>>                 BUILD_BUG_ON(MAX_SWAPFILES_SHIFT != 5)
>>
>> -#define __P000 PAGE_NONE
>> -#define __P001 PAGE_READ
>> -#define __P010 PAGE_READ
>> -#define __P011 PAGE_READ
>> -#define __P100 PAGE_READ
>> -#define __P101 PAGE_READ
>> -#define __P110 PAGE_READ
>> -#define __P111 PAGE_READ
>> -
>> -#define __S000 PAGE_NONE
>> -#define __S001 PAGE_READ
>> -#define __S010 PAGE_WRITE
>> -#define __S011 PAGE_WRITE
>> -#define __S100 PAGE_READ
>> -#define __S101 PAGE_READ
>> -#define __S110 PAGE_WRITE
>> -#define __S111 PAGE_WRITE
>> -
>>  extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
>>  #define ZERO_PAGE(vaddr)       (virt_to_page(empty_zero_page))
>>
>> diff --git a/arch/csky/mm/init.c b/arch/csky/mm/init.c
>> index bf2004aa811a..f9babbed17d4 100644
>> --- a/arch/csky/mm/init.c
>> +++ b/arch/csky/mm/init.c
>> @@ -197,3 +197,35 @@ void __init fixaddr_init(void)
>>         vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
>>         fixrange_init(vaddr, vaddr + PMD_SIZE, swapper_pg_dir);
>>  }
>> +
>> +pgprot_t vm_get_page_prot(unsigned long vm_flags)
>> +{
>> +       switch (vm_flags & (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)) {
>> +       case VM_NONE:
>> +               return PAGE_NONE;
>> +       case VM_READ:
>> +       case VM_WRITE:
>> +       case VM_WRITE | VM_READ:
>> +       case VM_EXEC:
>> +       case VM_EXEC | VM_READ:
>> +       case VM_EXEC | VM_WRITE:
>> +       case VM_EXEC | VM_WRITE | VM_READ:
>> +               return PAGE_READ;
>> +       case VM_SHARED:
>> +               return PAGE_NONE;
>> +       case VM_SHARED | VM_READ:
>> +               return PAGE_READ;
>> +       case VM_SHARED | VM_WRITE:
>> +       case VM_SHARED | VM_WRITE | VM_READ:
>> +               return PAGE_WRITE;
>> +       case VM_SHARED | VM_EXEC:
>> +       case VM_SHARED | VM_EXEC | VM_READ:
>> +               return PAGE_READ;
>> +       case VM_SHARED | VM_EXEC | VM_WRITE:
>> +       case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ:
>> +               return PAGE_WRITE;
>> +       default:
>> +               BUILD_BUG();
>> +       }
>> +}
>> +EXPORT_SYMBOL(vm_get_page_prot);
>> --
>> 2.25.1
>>
> 
>
diff mbox series

Patch

diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
index 21d72b078eef..588b8a9c68ed 100644
--- a/arch/csky/Kconfig
+++ b/arch/csky/Kconfig
@@ -6,6 +6,7 @@  config CSKY
 	select ARCH_HAS_GCOV_PROFILE_ALL
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
+	select ARCH_HAS_VM_GET_PAGE_PROT
 	select ARCH_USE_BUILTIN_BSWAP
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_WANT_FRAME_POINTERS if !CPU_CK610 && $(cc-option,-mbacktrace)
diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h
index bbe245117777..229a5f4ad7fc 100644
--- a/arch/csky/include/asm/pgtable.h
+++ b/arch/csky/include/asm/pgtable.h
@@ -77,24 +77,6 @@ 
 #define MAX_SWAPFILES_CHECK() \
 		BUILD_BUG_ON(MAX_SWAPFILES_SHIFT != 5)
 
-#define __P000	PAGE_NONE
-#define __P001	PAGE_READ
-#define __P010	PAGE_READ
-#define __P011	PAGE_READ
-#define __P100	PAGE_READ
-#define __P101	PAGE_READ
-#define __P110	PAGE_READ
-#define __P111	PAGE_READ
-
-#define __S000	PAGE_NONE
-#define __S001	PAGE_READ
-#define __S010	PAGE_WRITE
-#define __S011	PAGE_WRITE
-#define __S100	PAGE_READ
-#define __S101	PAGE_READ
-#define __S110	PAGE_WRITE
-#define __S111	PAGE_WRITE
-
 extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
 #define ZERO_PAGE(vaddr)	(virt_to_page(empty_zero_page))
 
diff --git a/arch/csky/mm/init.c b/arch/csky/mm/init.c
index bf2004aa811a..f9babbed17d4 100644
--- a/arch/csky/mm/init.c
+++ b/arch/csky/mm/init.c
@@ -197,3 +197,35 @@  void __init fixaddr_init(void)
 	vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
 	fixrange_init(vaddr, vaddr + PMD_SIZE, swapper_pg_dir);
 }
+
+pgprot_t vm_get_page_prot(unsigned long vm_flags)
+{
+	switch (vm_flags & (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)) {
+	case VM_NONE:
+		return PAGE_NONE;
+	case VM_READ:
+	case VM_WRITE:
+	case VM_WRITE | VM_READ:
+	case VM_EXEC:
+	case VM_EXEC | VM_READ:
+	case VM_EXEC | VM_WRITE:
+	case VM_EXEC | VM_WRITE | VM_READ:
+		return PAGE_READ;
+	case VM_SHARED:
+		return PAGE_NONE;
+	case VM_SHARED | VM_READ:
+		return PAGE_READ;
+	case VM_SHARED | VM_WRITE:
+	case VM_SHARED | VM_WRITE | VM_READ:
+		return PAGE_WRITE;
+	case VM_SHARED | VM_EXEC:
+	case VM_SHARED | VM_EXEC | VM_READ:
+		return PAGE_READ;
+	case VM_SHARED | VM_EXEC | VM_WRITE:
+	case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ:
+		return PAGE_WRITE;
+	default:
+		BUILD_BUG();
+	}
+}
+EXPORT_SYMBOL(vm_get_page_prot);