From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-mm@kvack.org, akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org,
Anshuman Khandual <anshuman.khandual@arm.com>,
Christoph Hellwig <hch@infradead.org>,
linux-arch@vger.kernel.org,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>,
linux-sh@vger.kernel.org
Subject: [PATCH V2 17/30] sh/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT
Date: Mon, 21 Feb 2022 12:08:26 +0530 [thread overview]
Message-ID: <1645425519-9034-18-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1645425519-9034-1-git-send-email-anshuman.khandual@arm.com>
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: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: linux-sh@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
arch/sh/Kconfig | 1 +
arch/sh/include/asm/pgtable.h | 17 ----------------
arch/sh/mm/mmap.c | 38 +++++++++++++++++++++++++++++++++++
3 files changed, 39 insertions(+), 17 deletions(-)
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 2474a04ceac4..f3fcd1c5e002 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -11,6 +11,7 @@ config SUPERH
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
+ select ARCH_HAS_VM_GET_PAGE_PROT
select ARCH_HIBERNATION_POSSIBLE if MMU
select ARCH_MIGHT_HAVE_PC_PARPORT
select ARCH_WANT_IPC_PARSE_VERSION
diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h
index d7ddb1ec86a0..6fb9ec54cf9b 100644
--- a/arch/sh/include/asm/pgtable.h
+++ b/arch/sh/include/asm/pgtable.h
@@ -89,23 +89,6 @@ static inline unsigned long phys_addr_mask(void)
* completely separate permission bits for user and kernel space.
*/
/*xwr*/
-#define __P000 PAGE_NONE
-#define __P001 PAGE_READONLY
-#define __P010 PAGE_COPY
-#define __P011 PAGE_COPY
-#define __P100 PAGE_EXECREAD
-#define __P101 PAGE_EXECREAD
-#define __P110 PAGE_COPY
-#define __P111 PAGE_COPY
-
-#define __S000 PAGE_NONE
-#define __S001 PAGE_READONLY
-#define __S010 PAGE_WRITEONLY
-#define __S011 PAGE_SHARED
-#define __S100 PAGE_EXECREAD
-#define __S101 PAGE_EXECREAD
-#define __S110 PAGE_RWX
-#define __S111 PAGE_RWX
typedef pte_t *pte_addr_t;
diff --git a/arch/sh/mm/mmap.c b/arch/sh/mm/mmap.c
index 6a1a1297baae..cad14af6c8e6 100644
--- a/arch/sh/mm/mmap.c
+++ b/arch/sh/mm/mmap.c
@@ -162,3 +162,41 @@ int valid_mmap_phys_addr_range(unsigned long pfn, size_t size)
{
return 1;
}
+
+#ifdef CONFIG_MMU
+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:
+ return PAGE_READONLY;
+ case VM_WRITE:
+ case VM_WRITE | VM_READ:
+ return PAGE_COPY;
+ case VM_EXEC:
+ case VM_EXEC | VM_READ:
+ return PAGE_EXECREAD;
+ case VM_EXEC | VM_WRITE:
+ case VM_EXEC | VM_WRITE | VM_READ:
+ return PAGE_COPY;
+ case VM_SHARED:
+ return PAGE_NONE;
+ case VM_SHARED | VM_READ:
+ return PAGE_READONLY;
+ case VM_SHARED | VM_WRITE:
+ return PAGE_WRITEONLY;
+ case VM_SHARED | VM_WRITE | VM_READ:
+ return PAGE_SHARED;
+ case VM_SHARED | VM_EXEC:
+ case VM_SHARED | VM_EXEC | VM_READ:
+ return PAGE_EXECREAD;
+ case VM_SHARED | VM_EXEC | VM_WRITE:
+ case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ:
+ return PAGE_RWX;
+ default:
+ BUILD_BUG();
+ }
+}
+EXPORT_SYMBOL(vm_get_page_prot);
+#endif
--
2.25.1
next prev parent reply other threads:[~2022-02-21 6:41 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-21 6:38 [PATCH V2 00/30] mm/mmap: Drop protection_map[] and platform's __SXXX/__PXXX requirements Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 01/30] mm/debug_vm_pgtable: Drop protection_map[] usage Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 02/30] mm/mmap: Clarify protection_map[] indices Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 03/30] mm/mmap: Add new config ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 04/30] powerpc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-21 6:38 ` Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 05/30] arm64/mm: " Anshuman Khandual
2022-02-21 6:38 ` Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 06/30] sparc/mm: " Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 07/30] mips/mm: " Anshuman Khandual
2022-02-21 9:55 ` Thomas Bogendoerfer
2022-02-21 6:38 ` [PATCH V2 08/30] m68k/mm: " Anshuman Khandual
2022-02-21 11:54 ` Geert Uytterhoeven
2022-02-22 5:44 ` Anshuman Khandual
2022-02-25 9:02 ` Geert Uytterhoeven
2022-02-25 9:35 ` Anshuman Khandual
2022-04-22 6:55 ` kernel test robot
2022-02-21 6:38 ` [PATCH V2 09/30] arm/mm: " Anshuman Khandual
2022-02-21 6:38 ` Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 10/30] x86/mm: " Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 11/30] mm/mmap: Drop protection_map[] Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 12/30] mm/mmap: Drop arch_filter_pgprot() Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 13/30] mm/mmap: Drop arch_vm_get_page_pgprot() Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 14/30] s390/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-21 7:09 ` Sven Schnelle
2022-02-23 11:18 ` Alexander Gordeev
2022-02-21 6:38 ` [PATCH V2 15/30] riscv/mm: " Anshuman Khandual
2022-02-21 6:38 ` Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 16/30] alpha/mm: " Anshuman Khandual
2022-02-21 6:38 ` Anshuman Khandual [this message]
2022-02-21 6:38 ` [PATCH V2 18/30] arc/mm: " Anshuman Khandual
2022-02-21 6:38 ` Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 19/30] csky/mm: " Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 20/30] extensa/mm: " Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 21/30] parisc/mm: " Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 22/30] openrisc/mm: " Anshuman Khandual
2022-02-21 6:38 ` [OpenRISC] " Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 23/30] um/mm: " Anshuman Khandual
2022-02-21 6:38 ` Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 24/30] microblaze/mm: " Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 25/30] nios2/mm: " Anshuman Khandual
2022-02-22 22:56 ` Dinh Nguyen
2022-02-21 6:38 ` [PATCH V2 26/30] hexagon/mm: " Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 27/30] nds32/mm: " Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 28/30] ia64/mm: " Anshuman Khandual
2022-02-21 6:50 ` Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 29/30] mm/mmap: Drop generic vm_get_page_prot() Anshuman Khandual
2022-02-21 6:38 ` [PATCH V2 30/30] mm/mmap: Drop ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
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