diff mbox series

[V5,04/26] sparc/mm: Move protection_map[] inside the platform

Message ID 20220627045833.1590055-5-anshuman.khandual@arm.com (mailing list archive)
State New, archived
Headers show
Series mm/mmap: Drop __SXXX/__PXXX macros from across platforms | expand

Commit Message

Anshuman Khandual June 27, 2022, 4:58 a.m. UTC
This moves protection_map[] inside the platform and while here, also enable
ARCH_HAS_VM_GET_PAGE_PROT on 32 bit platforms via DECLARE_VM_GET_PAGE_PROT.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 arch/sparc/Kconfig                  |  2 +-
 arch/sparc/include/asm/pgtable_32.h | 19 -------------------
 arch/sparc/include/asm/pgtable_64.h | 19 -------------------
 arch/sparc/mm/init_32.c             | 20 ++++++++++++++++++++
 arch/sparc/mm/init_64.c             |  3 +++
 5 files changed, 24 insertions(+), 39 deletions(-)

Comments

Sam Ravnborg June 27, 2022, 5:14 p.m. UTC | #1
Hi Anshuman,

On Mon, Jun 27, 2022 at 10:28:11AM +0530, Anshuman Khandual wrote:
> This moves protection_map[] inside the platform and while here, also enable
> ARCH_HAS_VM_GET_PAGE_PROT on 32 bit platforms via DECLARE_VM_GET_PAGE_PROT.
> 
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: sparclinux@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
> ---
>  arch/sparc/Kconfig                  |  2 +-
>  arch/sparc/include/asm/pgtable_32.h | 19 -------------------
>  arch/sparc/include/asm/pgtable_64.h | 19 -------------------
>  arch/sparc/mm/init_32.c             | 20 ++++++++++++++++++++
>  arch/sparc/mm/init_64.c             |  3 +++
>  5 files changed, 24 insertions(+), 39 deletions(-)
> 
> diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
> index ba449c47effd..09f868613a4d 100644
> --- a/arch/sparc/Kconfig
> +++ b/arch/sparc/Kconfig
> @@ -13,6 +13,7 @@ config 64BIT
>  config SPARC
>  	bool
>  	default y
> +	select ARCH_HAS_VM_GET_PAGE_PROT
>  	select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
>  	select ARCH_MIGHT_HAVE_PC_SERIO
>  	select DMA_OPS
> @@ -84,7 +85,6 @@ config SPARC64
>  	select PERF_USE_VMALLOC
>  	select ARCH_HAVE_NMI_SAFE_CMPXCHG
>  	select HAVE_C_RECORDMCOUNT
> -	select ARCH_HAS_VM_GET_PAGE_PROT
>  	select HAVE_ARCH_AUDITSYSCALL
>  	select ARCH_SUPPORTS_ATOMIC_RMW
>  	select ARCH_SUPPORTS_DEBUG_PAGEALLOC
> diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
> index 4866625da314..8ff549004fac 100644
> --- a/arch/sparc/include/asm/pgtable_32.h
> +++ b/arch/sparc/include/asm/pgtable_32.h
> @@ -64,25 +64,6 @@ void paging_init(void);
>  
>  extern unsigned long ptr_in_current_pgd;
>  
> -/*         xwr */
> -#define __P000  PAGE_NONE
> -#define __P001  PAGE_READONLY
> -#define __P010  PAGE_COPY
> -#define __P011  PAGE_COPY
> -#define __P100  PAGE_READONLY
> -#define __P101  PAGE_READONLY
> -#define __P110  PAGE_COPY
> -#define __P111  PAGE_COPY
> -
> -#define __S000	PAGE_NONE
> -#define __S001	PAGE_READONLY
> -#define __S010	PAGE_SHARED
> -#define __S011	PAGE_SHARED
> -#define __S100	PAGE_READONLY
> -#define __S101	PAGE_READONLY
> -#define __S110	PAGE_SHARED
> -#define __S111	PAGE_SHARED
> -
>  /* First physical page can be anywhere, the following is needed so that
>   * va-->pa and vice versa conversions work properly without performance
>   * hit for all __pa()/__va() operations.
> diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
> index 4679e45c8348..a779418ceba9 100644
> --- a/arch/sparc/include/asm/pgtable_64.h
> +++ b/arch/sparc/include/asm/pgtable_64.h
> @@ -187,25 +187,6 @@ bool kern_addr_valid(unsigned long addr);
>  #define _PAGE_SZHUGE_4U	_PAGE_SZ4MB_4U
>  #define _PAGE_SZHUGE_4V	_PAGE_SZ4MB_4V
>  
> -/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
> -#define __P000	__pgprot(0)
> -#define __P001	__pgprot(0)
> -#define __P010	__pgprot(0)
> -#define __P011	__pgprot(0)
> -#define __P100	__pgprot(0)
> -#define __P101	__pgprot(0)
> -#define __P110	__pgprot(0)
> -#define __P111	__pgprot(0)
> -
> -#define __S000	__pgprot(0)
> -#define __S001	__pgprot(0)
> -#define __S010	__pgprot(0)
> -#define __S011	__pgprot(0)
> -#define __S100	__pgprot(0)
> -#define __S101	__pgprot(0)
> -#define __S110	__pgprot(0)
> -#define __S111	__pgprot(0)
> -
>  #ifndef __ASSEMBLY__
>  
>  pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
> diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c
> index 1e9f577f084d..8693e4e28b86 100644
> --- a/arch/sparc/mm/init_32.c
> +++ b/arch/sparc/mm/init_32.c
> @@ -302,3 +302,23 @@ void sparc_flush_page_to_ram(struct page *page)
>  		__flush_page_to_ram(vaddr);
>  }
>  EXPORT_SYMBOL(sparc_flush_page_to_ram);
> +
> +static pgprot_t protection_map[16] __ro_after_init = {
This can be const - like done for powerpc and others.
sparc32 and sparc64 uses each their own - and I do not see sparc32 do
any modifications to protection_map.

With this change:
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>

> +	[VM_NONE]					= PAGE_NONE,
> +	[VM_READ]					= PAGE_READONLY,
> +	[VM_WRITE]					= PAGE_COPY,
> +	[VM_WRITE | VM_READ]				= PAGE_COPY,
> +	[VM_EXEC]					= PAGE_READONLY,
> +	[VM_EXEC | VM_READ]				= PAGE_READONLY,
> +	[VM_EXEC | VM_WRITE]				= PAGE_COPY,
> +	[VM_EXEC | VM_WRITE | VM_READ]			= PAGE_COPY,
> +	[VM_SHARED]					= PAGE_NONE,
> +	[VM_SHARED | VM_READ]				= PAGE_READONLY,
> +	[VM_SHARED | VM_WRITE]				= PAGE_SHARED,
> +	[VM_SHARED | VM_WRITE | VM_READ]		= PAGE_SHARED,
> +	[VM_SHARED | VM_EXEC]				= PAGE_READONLY,
> +	[VM_SHARED | VM_EXEC | VM_READ]			= PAGE_READONLY,
> +	[VM_SHARED | VM_EXEC | VM_WRITE]		= PAGE_SHARED,
> +	[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ]	= PAGE_SHARED
> +};
> +DECLARE_VM_GET_PAGE_PROT
> diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
> index f6174df2d5af..d6faee23c77d 100644
> --- a/arch/sparc/mm/init_64.c
> +++ b/arch/sparc/mm/init_64.c
> @@ -2634,6 +2634,9 @@ void vmemmap_free(unsigned long start, unsigned long end,
>  }
>  #endif /* CONFIG_SPARSEMEM_VMEMMAP */
>  
> +/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
> +static pgprot_t protection_map[16] __ro_after_init;
> +
>  static void prot_init_common(unsigned long page_none,
>  			     unsigned long page_shared,
>  			     unsigned long page_copy,
> -- 
> 2.25.1
Anshuman Khandual June 28, 2022, 3:12 a.m. UTC | #2
On 6/27/22 22:44, Sam Ravnborg wrote:
> Hi Anshuman,
> 
> On Mon, Jun 27, 2022 at 10:28:11AM +0530, Anshuman Khandual wrote:
>> This moves protection_map[] inside the platform and while here, also enable
>> ARCH_HAS_VM_GET_PAGE_PROT on 32 bit platforms via DECLARE_VM_GET_PAGE_PROT.
>>
>> Cc: "David S. Miller" <davem@davemloft.net>
>> Cc: sparclinux@vger.kernel.org
>> Cc: linux-kernel@vger.kernel.org
>> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
>> ---
>>  arch/sparc/Kconfig                  |  2 +-
>>  arch/sparc/include/asm/pgtable_32.h | 19 -------------------
>>  arch/sparc/include/asm/pgtable_64.h | 19 -------------------
>>  arch/sparc/mm/init_32.c             | 20 ++++++++++++++++++++
>>  arch/sparc/mm/init_64.c             |  3 +++
>>  5 files changed, 24 insertions(+), 39 deletions(-)
>>
>> diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
>> index ba449c47effd..09f868613a4d 100644
>> --- a/arch/sparc/Kconfig
>> +++ b/arch/sparc/Kconfig
>> @@ -13,6 +13,7 @@ config 64BIT
>>  config SPARC
>>  	bool
>>  	default y
>> +	select ARCH_HAS_VM_GET_PAGE_PROT
>>  	select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
>>  	select ARCH_MIGHT_HAVE_PC_SERIO
>>  	select DMA_OPS
>> @@ -84,7 +85,6 @@ config SPARC64
>>  	select PERF_USE_VMALLOC
>>  	select ARCH_HAVE_NMI_SAFE_CMPXCHG
>>  	select HAVE_C_RECORDMCOUNT
>> -	select ARCH_HAS_VM_GET_PAGE_PROT
>>  	select HAVE_ARCH_AUDITSYSCALL
>>  	select ARCH_SUPPORTS_ATOMIC_RMW
>>  	select ARCH_SUPPORTS_DEBUG_PAGEALLOC
>> diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
>> index 4866625da314..8ff549004fac 100644
>> --- a/arch/sparc/include/asm/pgtable_32.h
>> +++ b/arch/sparc/include/asm/pgtable_32.h
>> @@ -64,25 +64,6 @@ void paging_init(void);
>>  
>>  extern unsigned long ptr_in_current_pgd;
>>  
>> -/*         xwr */
>> -#define __P000  PAGE_NONE
>> -#define __P001  PAGE_READONLY
>> -#define __P010  PAGE_COPY
>> -#define __P011  PAGE_COPY
>> -#define __P100  PAGE_READONLY
>> -#define __P101  PAGE_READONLY
>> -#define __P110  PAGE_COPY
>> -#define __P111  PAGE_COPY
>> -
>> -#define __S000	PAGE_NONE
>> -#define __S001	PAGE_READONLY
>> -#define __S010	PAGE_SHARED
>> -#define __S011	PAGE_SHARED
>> -#define __S100	PAGE_READONLY
>> -#define __S101	PAGE_READONLY
>> -#define __S110	PAGE_SHARED
>> -#define __S111	PAGE_SHARED
>> -
>>  /* First physical page can be anywhere, the following is needed so that
>>   * va-->pa and vice versa conversions work properly without performance
>>   * hit for all __pa()/__va() operations.
>> diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
>> index 4679e45c8348..a779418ceba9 100644
>> --- a/arch/sparc/include/asm/pgtable_64.h
>> +++ b/arch/sparc/include/asm/pgtable_64.h
>> @@ -187,25 +187,6 @@ bool kern_addr_valid(unsigned long addr);
>>  #define _PAGE_SZHUGE_4U	_PAGE_SZ4MB_4U
>>  #define _PAGE_SZHUGE_4V	_PAGE_SZ4MB_4V
>>  
>> -/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
>> -#define __P000	__pgprot(0)
>> -#define __P001	__pgprot(0)
>> -#define __P010	__pgprot(0)
>> -#define __P011	__pgprot(0)
>> -#define __P100	__pgprot(0)
>> -#define __P101	__pgprot(0)
>> -#define __P110	__pgprot(0)
>> -#define __P111	__pgprot(0)
>> -
>> -#define __S000	__pgprot(0)
>> -#define __S001	__pgprot(0)
>> -#define __S010	__pgprot(0)
>> -#define __S011	__pgprot(0)
>> -#define __S100	__pgprot(0)
>> -#define __S101	__pgprot(0)
>> -#define __S110	__pgprot(0)
>> -#define __S111	__pgprot(0)
>> -
>>  #ifndef __ASSEMBLY__
>>  
>>  pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
>> diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c
>> index 1e9f577f084d..8693e4e28b86 100644
>> --- a/arch/sparc/mm/init_32.c
>> +++ b/arch/sparc/mm/init_32.c
>> @@ -302,3 +302,23 @@ void sparc_flush_page_to_ram(struct page *page)
>>  		__flush_page_to_ram(vaddr);
>>  }
>>  EXPORT_SYMBOL(sparc_flush_page_to_ram);
>> +
>> +static pgprot_t protection_map[16] __ro_after_init = {
> This can be const - like done for powerpc and others.
> sparc32 and sparc64 uses each their own - and I do not see sparc32 do
> any modifications to protection_map.

Indeed protection_map[] arrays are independent both for sparc32 and spacr64.
sparc32 platform never changes the protection_map[] array during boot. Sure,
will make it into a const instead. Thanks for pointing this out.

> 
> With this change:
> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
>
diff mbox series

Patch

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index ba449c47effd..09f868613a4d 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -13,6 +13,7 @@  config 64BIT
 config SPARC
 	bool
 	default y
+	select ARCH_HAS_VM_GET_PAGE_PROT
 	select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
 	select ARCH_MIGHT_HAVE_PC_SERIO
 	select DMA_OPS
@@ -84,7 +85,6 @@  config SPARC64
 	select PERF_USE_VMALLOC
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select HAVE_C_RECORDMCOUNT
-	select ARCH_HAS_VM_GET_PAGE_PROT
 	select HAVE_ARCH_AUDITSYSCALL
 	select ARCH_SUPPORTS_ATOMIC_RMW
 	select ARCH_SUPPORTS_DEBUG_PAGEALLOC
diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
index 4866625da314..8ff549004fac 100644
--- a/arch/sparc/include/asm/pgtable_32.h
+++ b/arch/sparc/include/asm/pgtable_32.h
@@ -64,25 +64,6 @@  void paging_init(void);
 
 extern unsigned long ptr_in_current_pgd;
 
-/*         xwr */
-#define __P000  PAGE_NONE
-#define __P001  PAGE_READONLY
-#define __P010  PAGE_COPY
-#define __P011  PAGE_COPY
-#define __P100  PAGE_READONLY
-#define __P101  PAGE_READONLY
-#define __P110  PAGE_COPY
-#define __P111  PAGE_COPY
-
-#define __S000	PAGE_NONE
-#define __S001	PAGE_READONLY
-#define __S010	PAGE_SHARED
-#define __S011	PAGE_SHARED
-#define __S100	PAGE_READONLY
-#define __S101	PAGE_READONLY
-#define __S110	PAGE_SHARED
-#define __S111	PAGE_SHARED
-
 /* First physical page can be anywhere, the following is needed so that
  * va-->pa and vice versa conversions work properly without performance
  * hit for all __pa()/__va() operations.
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index 4679e45c8348..a779418ceba9 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -187,25 +187,6 @@  bool kern_addr_valid(unsigned long addr);
 #define _PAGE_SZHUGE_4U	_PAGE_SZ4MB_4U
 #define _PAGE_SZHUGE_4V	_PAGE_SZ4MB_4V
 
-/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
-#define __P000	__pgprot(0)
-#define __P001	__pgprot(0)
-#define __P010	__pgprot(0)
-#define __P011	__pgprot(0)
-#define __P100	__pgprot(0)
-#define __P101	__pgprot(0)
-#define __P110	__pgprot(0)
-#define __P111	__pgprot(0)
-
-#define __S000	__pgprot(0)
-#define __S001	__pgprot(0)
-#define __S010	__pgprot(0)
-#define __S011	__pgprot(0)
-#define __S100	__pgprot(0)
-#define __S101	__pgprot(0)
-#define __S110	__pgprot(0)
-#define __S111	__pgprot(0)
-
 #ifndef __ASSEMBLY__
 
 pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c
index 1e9f577f084d..8693e4e28b86 100644
--- a/arch/sparc/mm/init_32.c
+++ b/arch/sparc/mm/init_32.c
@@ -302,3 +302,23 @@  void sparc_flush_page_to_ram(struct page *page)
 		__flush_page_to_ram(vaddr);
 }
 EXPORT_SYMBOL(sparc_flush_page_to_ram);
+
+static pgprot_t protection_map[16] __ro_after_init = {
+	[VM_NONE]					= PAGE_NONE,
+	[VM_READ]					= PAGE_READONLY,
+	[VM_WRITE]					= PAGE_COPY,
+	[VM_WRITE | VM_READ]				= PAGE_COPY,
+	[VM_EXEC]					= PAGE_READONLY,
+	[VM_EXEC | VM_READ]				= PAGE_READONLY,
+	[VM_EXEC | VM_WRITE]				= PAGE_COPY,
+	[VM_EXEC | VM_WRITE | VM_READ]			= PAGE_COPY,
+	[VM_SHARED]					= PAGE_NONE,
+	[VM_SHARED | VM_READ]				= PAGE_READONLY,
+	[VM_SHARED | VM_WRITE]				= PAGE_SHARED,
+	[VM_SHARED | VM_WRITE | VM_READ]		= PAGE_SHARED,
+	[VM_SHARED | VM_EXEC]				= PAGE_READONLY,
+	[VM_SHARED | VM_EXEC | VM_READ]			= PAGE_READONLY,
+	[VM_SHARED | VM_EXEC | VM_WRITE]		= PAGE_SHARED,
+	[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ]	= PAGE_SHARED
+};
+DECLARE_VM_GET_PAGE_PROT
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index f6174df2d5af..d6faee23c77d 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2634,6 +2634,9 @@  void vmemmap_free(unsigned long start, unsigned long end,
 }
 #endif /* CONFIG_SPARSEMEM_VMEMMAP */
 
+/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
+static pgprot_t protection_map[16] __ro_after_init;
+
 static void prot_init_common(unsigned long page_none,
 			     unsigned long page_shared,
 			     unsigned long page_copy,