From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-mm@kvack.org, akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org, geert@linux-m68k.org,
Anshuman Khandual <anshuman.khandual@arm.com>,
Christoph Hellwig <hch@infradead.org>,
linuxppc-dev@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org, sparclinux@vger.kernel.org,
linux-mips@vger.kernel.org, linux-m68k@lists.linux-m68k.org,
linux-s390@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-alpha@vger.kernel.org, linux-sh@vger.kernel.org,
linux-snps-arc@lists.infradead.org, linux-csky@vger.kernel.org,
linux-xtensa@linux-xtensa.org, linux-parisc@vger.kernel.org,
openrisc@lists.librecores.org, linux-um@lists.infradead.org,
linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org,
linux-arch@vger.kernel.org, Vineet Gupta <vgupta@kernel.org>
Subject: [PATCH V3 18/30] arc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT
Date: Mon, 28 Feb 2022 16:17:41 +0530 [thread overview]
Message-ID: <1646045273-9343-19-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1646045273-9343-1-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: Vineet Gupta <vgupta@kernel.org>
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
arch/arc/Kconfig | 1 +
arch/arc/include/asm/pgtable-bits-arcv2.h | 17 ----------
arch/arc/mm/mmap.c | 41 +++++++++++++++++++++++
3 files changed, 42 insertions(+), 17 deletions(-)
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 3c2a4753d09b..78ff0644b343 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -13,6 +13,7 @@ config ARC
select ARCH_HAS_SETUP_DMA_OPS
select ARCH_HAS_SYNC_DMA_FOR_CPU
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
+ select ARCH_HAS_VM_GET_PAGE_PROT
select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
select ARCH_32BIT_OFF_T
select BUILDTIME_TABLE_SORT
diff --git a/arch/arc/include/asm/pgtable-bits-arcv2.h b/arch/arc/include/asm/pgtable-bits-arcv2.h
index 183d23bc1e00..798308f4dbad 100644
--- a/arch/arc/include/asm/pgtable-bits-arcv2.h
+++ b/arch/arc/include/asm/pgtable-bits-arcv2.h
@@ -72,23 +72,6 @@
* This is to enable COW mechanism
*/
/* xwr */
-#define __P000 PAGE_U_NONE
-#define __P001 PAGE_U_R
-#define __P010 PAGE_U_R /* Pvt-W => !W */
-#define __P011 PAGE_U_R /* Pvt-W => !W */
-#define __P100 PAGE_U_X_R /* X => R */
-#define __P101 PAGE_U_X_R
-#define __P110 PAGE_U_X_R /* Pvt-W => !W and X => R */
-#define __P111 PAGE_U_X_R /* Pvt-W => !W */
-
-#define __S000 PAGE_U_NONE
-#define __S001 PAGE_U_R
-#define __S010 PAGE_U_W_R /* W => R */
-#define __S011 PAGE_U_W_R
-#define __S100 PAGE_U_X_R /* X => R */
-#define __S101 PAGE_U_X_R
-#define __S110 PAGE_U_X_W_R /* X => R */
-#define __S111 PAGE_U_X_W_R
#ifndef __ASSEMBLY__
diff --git a/arch/arc/mm/mmap.c b/arch/arc/mm/mmap.c
index 722d26b94307..d286894d7359 100644
--- a/arch/arc/mm/mmap.c
+++ b/arch/arc/mm/mmap.c
@@ -74,3 +74,44 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
info.align_offset = pgoff << PAGE_SHIFT;
return vm_unmapped_area(&info);
}
+
+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_U_NONE;
+ case VM_READ:
+ /* Pvt-W => !W */
+ case VM_WRITE:
+ /* Pvt-W => !W */
+ case VM_WRITE | VM_READ:
+ return PAGE_U_R;
+ /* X => R */
+ case VM_EXEC:
+ case VM_EXEC | VM_READ:
+ /* Pvt-W => !W and X => R */
+ case VM_EXEC | VM_WRITE:
+ /* Pvt-W => !W */
+ case VM_EXEC | VM_WRITE | VM_READ:
+ return PAGE_U_X_R;
+ case VM_SHARED:
+ return PAGE_U_NONE;
+ case VM_SHARED | VM_READ:
+ return PAGE_U_R;
+ /* W => R */
+ case VM_SHARED | VM_WRITE:
+ case VM_SHARED | VM_WRITE | VM_READ:
+ return PAGE_U_W_R;
+ /* X => R */
+ case VM_SHARED | VM_EXEC:
+ case VM_SHARED | VM_EXEC | VM_READ:
+ return PAGE_U_X_R;
+ /* X => R */
+ case VM_SHARED | VM_EXEC | VM_WRITE:
+ case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ:
+ return PAGE_U_X_W_R;
+ default:
+ BUILD_BUG();
+ }
+}
+EXPORT_SYMBOL(vm_get_page_prot);
--
2.25.1
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next prev parent reply other threads:[~2022-02-28 11:06 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-28 10:47 [PATCH V3 00/30] mm/mmap: Drop protection_map[] and platform's __SXXX/__PXXX requirements Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 01/30] mm/debug_vm_pgtable: Drop protection_map[] usage Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 02/30] mm/mmap: Clarify protection_map[] indices Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 03/30] mm/mmap: Add new config ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 04/30] powerpc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-03-02 5:23 ` Michael Ellerman
2022-02-28 10:47 ` [PATCH V3 05/30] arm64/mm: " Anshuman Khandual
2022-03-03 15:28 ` Catalin Marinas
2022-03-09 11:31 ` Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 06/30] sparc/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 07/30] mips/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 08/30] m68k/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 09/30] arm/mm: " Anshuman Khandual
2022-02-28 10:57 ` Russell King (Oracle)
2022-02-28 13:49 ` Geert Uytterhoeven
2022-03-01 0:00 ` Anshuman Khandual
2022-03-01 0:31 ` Russell King (Oracle)
2022-03-01 8:16 ` Christophe Leroy
2022-03-02 3:22 ` Anshuman Khandual
2022-03-02 7:05 ` Christophe Leroy
2022-03-02 9:51 ` Anshuman Khandual
2022-03-02 10:05 ` Geert Uytterhoeven
2022-03-02 11:06 ` Anshuman Khandual
2022-03-02 11:14 ` Geert Uytterhoeven
2022-03-09 11:33 ` Anshuman Khandual
2022-03-02 11:19 ` Russell King (Oracle)
2022-03-02 3:15 ` Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 10/30] x86/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 11/30] mm/mmap: Drop protection_map[] Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 12/30] mm/mmap: Drop arch_filter_pgprot() Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 13/30] mm/mmap: Drop arch_vm_get_page_pgprot() Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 14/30] s390/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 15/30] riscv/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 16/30] alpha/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 17/30] sh/mm: " Anshuman Khandual
2022-02-28 10:47 ` Anshuman Khandual [this message]
2022-02-28 10:47 ` [PATCH V3 19/30] csky/mm: " Anshuman Khandual
2022-03-01 14:00 ` Guo Ren
2022-02-28 10:47 ` [PATCH V3 20/30] xtensa/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 21/30] parisc/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 22/30] openrisc/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 23/30] um/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 24/30] microblaze/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 25/30] nios2/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 26/30] hexagon/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 27/30] nds32/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 28/30] ia64/mm: " Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 29/30] mm/mmap: Drop generic vm_get_page_prot() Anshuman Khandual
2022-02-28 10:47 ` [PATCH V3 30/30] mm/mmap: Drop ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
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