linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org, hch@infradead.org,
	akpm@linux-foundation.org,
	Anshuman Khandual <anshuman.khandual@arm.com>,
	Brian Cain <bcain@codeaurora.org>,
	linux-hexagon@vger.kernel.org
Subject: [RFC V1 26/31] hexagon/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT
Date: Mon, 24 Jan 2022 18:27:03 +0530	[thread overview]
Message-ID: <1643029028-12710-27-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1643029028-12710-1-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: Brian Cain <bcain@codeaurora.org>
Cc: linux-hexagon@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 arch/hexagon/Kconfig               |  1 +
 arch/hexagon/include/asm/pgtable.h | 24 -----------------
 arch/hexagon/mm/init.c             | 42 ++++++++++++++++++++++++++++++
 3 files changed, 43 insertions(+), 24 deletions(-)

diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index 15dd8f38b698..cdc5df32a1e3 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -6,6 +6,7 @@ config HEXAGON
 	def_bool y
 	select ARCH_32BIT_OFF_T
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
+	select ARCH_HAS_VM_GET_PAGE_PROT
 	select ARCH_NO_PREEMPT
 	select DMA_GLOBAL_POOL
 	# Other pending projects/to-do items.
diff --git a/arch/hexagon/include/asm/pgtable.h b/arch/hexagon/include/asm/pgtable.h
index 18cd6ea9ab23..5eceddfe013d 100644
--- a/arch/hexagon/include/asm/pgtable.h
+++ b/arch/hexagon/include/asm/pgtable.h
@@ -127,31 +127,7 @@ extern unsigned long _dflt_cache_att;
 #define CACHEDEF	(CACHE_DEFAULT << 6)
 
 /* Private (copy-on-write) page protections. */
-#define __P000 __pgprot(_PAGE_PRESENT | _PAGE_USER | CACHEDEF)
-#define __P001 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | CACHEDEF)
-#define __P010 __P000	/* Write-only copy-on-write */
-#define __P011 __P001	/* Read/Write copy-on-write */
-#define __P100 __pgprot(_PAGE_PRESENT | _PAGE_USER | \
-			_PAGE_EXECUTE | CACHEDEF)
-#define __P101 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_EXECUTE | \
-			_PAGE_READ | CACHEDEF)
-#define __P110 __P100	/* Write/execute copy-on-write */
-#define __P111 __P101	/* Read/Write/Execute, copy-on-write */
-
 /* Shared page protections. */
-#define __S000 __P000
-#define __S001 __P001
-#define __S010 __pgprot(_PAGE_PRESENT | _PAGE_USER | \
-			_PAGE_WRITE | CACHEDEF)
-#define __S011 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | \
-			_PAGE_WRITE | CACHEDEF)
-#define __S100 __pgprot(_PAGE_PRESENT | _PAGE_USER | \
-			_PAGE_EXECUTE | CACHEDEF)
-#define __S101 __P101
-#define __S110 __pgprot(_PAGE_PRESENT | _PAGE_USER | \
-			_PAGE_EXECUTE | _PAGE_WRITE | CACHEDEF)
-#define __S111 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | \
-			_PAGE_EXECUTE | _PAGE_WRITE | CACHEDEF)
 
 extern pgd_t swapper_pg_dir[PTRS_PER_PGD];  /* located in head.S */
 
diff --git a/arch/hexagon/mm/init.c b/arch/hexagon/mm/init.c
index f01e91e10d95..9f411e3eba68 100644
--- a/arch/hexagon/mm/init.c
+++ b/arch/hexagon/mm/init.c
@@ -236,3 +236,45 @@ void __init setup_arch_memory(void)
 	 *  which is called by start_kernel() later on in the process
 	 */
 }
+
+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 __pgprot(_PAGE_PRESENT|_PAGE_USER|CACHEDEF);
+	case VM_READ:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_READ|CACHEDEF);
+	case VM_WRITE:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|CACHEDEF);
+	case VM_READ | VM_WRITE:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_READ|CACHEDEF);
+	case VM_EXEC:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|CACHEDEF);
+	case VM_EXEC | VM_READ:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|_PAGE_READ|CACHEDEF);
+	case VM_EXEC | VM_WRITE:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|CACHEDEF);
+	case VM_EXEC | VM_READ | VM_WRITE:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|_PAGE_READ|CACHEDEF);
+	case VM_SHARED:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|CACHEDEF);
+	case VM_SHARED | VM_READ:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_READ|CACHEDEF);
+	case VM_SHARED | VM_WRITE:
+		return  __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_WRITE|CACHEDEF);
+	case VM_SHARED | VM_READ | VM_WRITE:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_READ|_PAGE_WRITE|CACHEDEF);
+	case VM_SHARED | VM_EXEC:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|CACHEDEF);
+	case VM_SHARED | VM_EXEC | VM_READ:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|_PAGE_READ|CACHEDEF);
+	case VM_SHARED | VM_EXEC | VM_WRITE:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_EXECUTE|_PAGE_WRITE|CACHEDEF);
+	case VM_SHARED | VM_EXEC | VM_READ | VM_WRITE:
+		return __pgprot(_PAGE_PRESENT|_PAGE_USER|_PAGE_READ|_PAGE_EXECUTE|_PAGE_WRITE|
+				CACHEDEF);
+	default:
+		BUILD_BUG();
+	}
+}
+EXPORT_SYMBOL(vm_get_page_prot);
-- 
2.25.1


  parent reply	other threads:[~2022-01-24 12:59 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-24 12:56 [RFC V1 00/31] mm/mmap: Drop protection_map[] and platform's __SXXX/__PXXX requirements Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 01/31] mm/debug_vm_pgtable: Directly use vm_get_page_prot() Anshuman Khandual
2022-01-26  7:15   ` Christoph Hellwig
2022-01-27  4:16     ` Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 02/31] mm/mmap: Clarify protection_map[] indices Anshuman Khandual
2022-01-26  7:16   ` Christoph Hellwig
2022-01-27  4:07     ` Anshuman Khandual
2022-01-27 12:39   ` Mike Rapoport
2022-01-31  3:25     ` Anshuman Khandual
2022-02-05  9:10   ` Firo Yang
2022-02-09  3:23     ` Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 03/31] mm/mmap: Add new config ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 04/31] powerpc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-03 18:15   ` Mike Rapoport
2022-02-04  2:57     ` Anshuman Khandual
2022-02-04  4:44       ` Mike Rapoport
2022-01-24 12:56 ` [RFC V1 05/31] arm64/mm: " Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 06/31] sparc/mm: " Anshuman Khandual
2022-01-24 12:58   ` David Miller
2022-01-24 18:21   ` Khalid Aziz
2022-01-24 12:56 ` [RFC V1 07/31] mips/mm: " Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 08/31] m68k/mm: " Anshuman Khandual
2022-01-24 14:13   ` Andreas Schwab
2022-01-25  3:42     ` Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 09/31] arm/mm: " Anshuman Khandual
2022-01-24 17:06   ` Russell King (Oracle)
2022-01-25  3:36     ` Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 10/31] x86/mm: " Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 11/31] mm/mmap: Drop protection_map[] Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 12/31] mm/mmap: Drop arch_filter_pgprot() Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 13/31] mm/mmap: Drop arch_vm_get_page_pgprot() Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 14/31] s390/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 15/31] riscv/mm: " Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 16/31] alpha/mm: " Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 17/31] sh/mm: " Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 18/31] arc/mm: " Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 19/31] csky/mm: " Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 20/31] extensa/mm: " Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 21/31] parisc/mm: " Anshuman Khandual
2022-01-25 16:53   ` Rolf Eike Beer
2022-01-27  4:06     ` Anshuman Khandual
2022-01-24 12:56 ` [RFC V1 22/31] openrisc/mm: " Anshuman Khandual
2022-02-05  6:58   ` [OpenRISC] " Stafford Horne
2022-01-24 12:57 ` [RFC V1 23/31] um/mm: " Anshuman Khandual
2022-01-24 12:57 ` [RFC V1 24/31] microblaze/mm: " Anshuman Khandual
2022-01-24 12:57 ` [RFC V1 25/31] nios2/mm: " Anshuman Khandual
2022-01-26 16:38   ` Dinh Nguyen
2022-01-24 12:57 ` Anshuman Khandual [this message]
2022-01-24 12:57 ` [RFC V1 27/31] nds32/mm: " Anshuman Khandual
2022-01-24 12:57 ` [RFC V1 28/31] ia64/mm: " Anshuman Khandual
2022-01-24 12:57 ` [RFC V1 29/31] mm/mmap: Drop generic vm_get_page_prot() Anshuman Khandual
2022-01-24 12:57 ` [RFC V1 30/31] mm/mmap: Drop ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-01-24 12:57 ` [RFC V1 31/31] mm/mmap: Define macros for vm_flags access permission combinations Anshuman Khandual
2022-02-03  5:24   ` Anshuman Khandual
2022-01-27 12:38 ` [RFC V1 00/31] mm/mmap: Drop protection_map[] and platform's __SXXX/__PXXX requirements Mike Rapoport
2022-01-31  3:35   ` Anshuman Khandual

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1643029028-12710-27-git-send-email-anshuman.khandual@arm.com \
    --to=anshuman.khandual@arm.com \
    --cc=akpm@linux-foundation.org \
    --cc=bcain@codeaurora.org \
    --cc=hch@infradead.org \
    --cc=linux-hexagon@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).