From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org,
Anshuman Khandual <anshuman.khandual@arm.com>,
Christoph Hellwig <hch@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-arch@vger.kernel.org, Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
linux-s390@vger.kernel.org
Subject: [PATCH 14/30] s390/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT
Date: Mon, 14 Feb 2022 08:00:37 +0530 [thread overview]
Message-ID: <1644805853-21338-15-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1644805853-21338-1-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: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: linux-s390@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
arch/s390/Kconfig | 1 +
arch/s390/include/asm/pgtable.h | 17 -----------------
arch/s390/mm/mmap.c | 33 +++++++++++++++++++++++++++++++++
3 files changed, 34 insertions(+), 17 deletions(-)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index be9f39fd06df..cb1b487e8201 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -78,6 +78,7 @@ config S390
select ARCH_HAS_SYSCALL_WRAPPER
select ARCH_HAS_UBSAN_SANITIZE_ALL
select ARCH_HAS_VDSO_DATA
+ select ARCH_HAS_VM_GET_PAGE_PROT
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_INLINE_READ_LOCK
select ARCH_INLINE_READ_LOCK_BH
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 008a6c856fa4..3893ef64b439 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -422,23 +422,6 @@ static inline int is_module_addr(void *addr)
* implies read permission.
*/
/*xwr*/
-#define __P000 PAGE_NONE
-#define __P001 PAGE_RO
-#define __P010 PAGE_RO
-#define __P011 PAGE_RO
-#define __P100 PAGE_RX
-#define __P101 PAGE_RX
-#define __P110 PAGE_RX
-#define __P111 PAGE_RX
-
-#define __S000 PAGE_NONE
-#define __S001 PAGE_RO
-#define __S010 PAGE_RW
-#define __S011 PAGE_RW
-#define __S100 PAGE_RX
-#define __S101 PAGE_RX
-#define __S110 PAGE_RWX
-#define __S111 PAGE_RWX
/*
* Segment entry (large page) protection definitions.
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index e54f928503c5..e99c198aa5de 100644
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -188,3 +188,36 @@ void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack)
mm->get_unmapped_area = arch_get_unmapped_area_topdown;
}
}
+
+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:
+ return PAGE_RO;
+ case VM_EXEC:
+ case VM_EXEC | VM_READ:
+ case VM_EXEC | VM_WRITE:
+ case VM_EXEC | VM_WRITE | VM_READ:
+ return PAGE_RX;
+ case VM_SHARED:
+ return PAGE_NONE;
+ case VM_SHARED | VM_READ:
+ return PAGE_RO;
+ case VM_SHARED | VM_WRITE:
+ case VM_SHARED | VM_WRITE | VM_READ:
+ return PAGE_RW;
+ case VM_SHARED | VM_EXEC:
+ case VM_SHARED | VM_EXEC | VM_READ:
+ return PAGE_RX;
+ 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);
--
2.25.1
next prev parent reply other threads:[~2022-02-14 2:31 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-14 2:30 [PATCH 00/30] mm/mmap: Drop protection_map[] and platform's __SXXX/__PXXX requirements Anshuman Khandual
2022-02-14 2:30 ` [PATCH 01/30] mm/debug_vm_pgtable: Drop protection_map[] usage Anshuman Khandual
2022-02-14 2:30 ` [PATCH 02/30] mm/mmap: Clarify protection_map[] indices Anshuman Khandual
2022-02-14 2:30 ` [PATCH 03/30] mm/mmap: Add new config ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-14 2:30 ` [PATCH 04/30] powerpc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-14 2:30 ` [PATCH 05/30] arm64/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 06/30] sparc/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 07/30] mips/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 08/30] m68k/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 09/30] arm/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 10/30] x86/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 11/30] mm/mmap: Drop protection_map[] Anshuman Khandual
2022-02-14 2:30 ` [PATCH 12/30] mm/mmap: Drop arch_filter_pgprot() Anshuman Khandual
2022-02-14 2:30 ` [PATCH 13/30] mm/mmap: Drop arch_vm_get_page_pgprot() Anshuman Khandual
2022-02-14 2:30 ` Anshuman Khandual [this message]
2022-02-14 2:30 ` [PATCH 15/30] riscv/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-14 2:30 ` [PATCH 16/30] alpha/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 17/30] sh/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 18/30] arc/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 19/30] csky/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 20/30] extensa/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 21/30] parisc/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 22/30] openrisc/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 23/30] um/mm: " Anshuman Khandual
2022-02-14 6:40 ` kernel test robot
2022-02-14 10:03 ` Anshuman Khandual
2022-02-14 2:30 ` [PATCH 24/30] microblaze/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 25/30] nios2/mm: " Anshuman Khandual
2022-02-25 1:31 ` Dinh Nguyen
2022-02-25 8:52 ` Anshuman Khandual
2022-02-25 8:54 ` Anshuman Khandual
2022-02-25 14:29 ` Dinh Nguyen
2022-02-25 14:38 ` Dinh Nguyen
2022-02-28 2:27 ` Anshuman Khandual
2022-02-14 2:30 ` [PATCH 26/30] hexagon/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 27/30] nds32/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 28/30] ia64/mm: " Anshuman Khandual
2022-02-14 2:30 ` [PATCH 29/30] mm/mmap: Drop generic vm_get_page_prot() Anshuman Khandual
2022-02-14 2:30 ` [PATCH 30/30] mm/mmap: Drop ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-14 9:48 ` Geert Uytterhoeven
2022-02-14 9:59 ` Anshuman Khandual
2022-02-17 9:46 ` [PATCH 00/30] mm/mmap: Drop protection_map[] and platform's __SXXX/__PXXX requirements Anshuman Khandual
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