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" <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Anshuman Khandual <[email protected]>
---
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 = {
+ [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
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" <[email protected]>
> Cc: [email protected]
> Cc: [email protected]
> Signed-off-by: Anshuman Khandual <[email protected]>
> ---
> 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 <[email protected]>
> + [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
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" <[email protected]>
>> Cc: [email protected]
>> Cc: [email protected]
>> Signed-off-by: Anshuman Khandual <[email protected]>
>> ---
>> 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 <[email protected]>
>