From: Anshuman Khandual <anshuman.khandual@arm.com>
To: openrisc@lists.librecores.org
Subject: [OpenRISC] [PATCH V3 06/30] sparc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT
Date: Mon, 28 Feb 2022 16:17:29 +0530 [thread overview]
Message-ID: <1646045273-9343-7-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. This also localizes the
helper arch_vm_get_page_prot() as sparc_vm_get_page_prot() and moves near
vm_get_page_prot().
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Khalid Aziz <khalid.aziz@oracle.com>
Cc: sparclinux at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
arch/sparc/Kconfig | 2 +
arch/sparc/include/asm/mman.h | 6 ---
arch/sparc/include/asm/pgtable_32.h | 19 --------
arch/sparc/include/asm/pgtable_64.h | 19 --------
arch/sparc/mm/init_32.c | 35 +++++++++++++++
arch/sparc/mm/init_64.c | 70 +++++++++++++++++++++--------
6 files changed, 88 insertions(+), 63 deletions(-)
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 1cab1b284f1a..ff29156f2380 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -59,6 +59,7 @@ config SPARC32
select HAVE_UID16
select OLD_SIGACTION
select ZONE_DMA
+ select ARCH_HAS_VM_GET_PAGE_PROT
config SPARC64
def_bool 64BIT
@@ -84,6 +85,7 @@ 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/mman.h b/arch/sparc/include/asm/mman.h
index 274217e7ed70..af9c10c83dc5 100644
--- a/arch/sparc/include/asm/mman.h
+++ b/arch/sparc/include/asm/mman.h
@@ -46,12 +46,6 @@ static inline unsigned long sparc_calc_vm_prot_bits(unsigned long prot)
}
}
-#define arch_vm_get_page_prot(vm_flags) sparc_vm_get_page_prot(vm_flags)
-static inline pgprot_t sparc_vm_get_page_prot(unsigned long vm_flags)
-{
- return (vm_flags & VM_SPARC_ADI) ? __pgprot(_PAGE_MCD_4V) : __pgprot(0);
-}
-
#define arch_validate_prot(prot, addr) sparc_validate_prot(prot, addr)
static inline int sparc_validate_prot(unsigned long prot, unsigned long addr)
{
diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
index ffccfe3b22ed..060a435f96d6 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..348cbfe08b60 100644
--- a/arch/sparc/mm/init_32.c
+++ b/arch/sparc/mm/init_32.c
@@ -302,3 +302,38 @@ void sparc_flush_page_to_ram(struct page *page)
__flush_page_to_ram(vaddr);
}
EXPORT_SYMBOL(sparc_flush_page_to_ram);
+
+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_READONLY;
+ 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:
+ case VM_SHARED | VM_WRITE | VM_READ:
+ return PAGE_SHARED;
+ case VM_SHARED | VM_EXEC:
+ case VM_SHARED | VM_EXEC | VM_READ:
+ return PAGE_READONLY;
+ case VM_SHARED | VM_EXEC | VM_WRITE:
+ case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ:
+ return PAGE_SHARED;
+ default:
+ BUILD_BUG();
+ }
+}
+EXPORT_SYMBOL(vm_get_page_prot);
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 1b23639e2fcd..a390116d371b 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -50,6 +50,7 @@
#include <asm/cpudata.h>
#include <asm/setup.h>
#include <asm/irq.h>
+#include <asm/mman.h>
#include "init_64.h"
@@ -2641,29 +2642,13 @@ static void prot_init_common(unsigned long page_none,
{
PAGE_COPY = __pgprot(page_copy);
PAGE_SHARED = __pgprot(page_shared);
-
- protection_map[0x0] = __pgprot(page_none);
- protection_map[0x1] = __pgprot(page_readonly & ~page_exec_bit);
- protection_map[0x2] = __pgprot(page_copy & ~page_exec_bit);
- protection_map[0x3] = __pgprot(page_copy & ~page_exec_bit);
- protection_map[0x4] = __pgprot(page_readonly);
- protection_map[0x5] = __pgprot(page_readonly);
- protection_map[0x6] = __pgprot(page_copy);
- protection_map[0x7] = __pgprot(page_copy);
- protection_map[0x8] = __pgprot(page_none);
- protection_map[0x9] = __pgprot(page_readonly & ~page_exec_bit);
- protection_map[0xa] = __pgprot(page_shared & ~page_exec_bit);
- protection_map[0xb] = __pgprot(page_shared & ~page_exec_bit);
- protection_map[0xc] = __pgprot(page_readonly);
- protection_map[0xd] = __pgprot(page_readonly);
- protection_map[0xe] = __pgprot(page_shared);
- protection_map[0xf] = __pgprot(page_shared);
}
+static unsigned long page_none, page_shared, page_copy, page_readonly;
+static unsigned long page_exec_bit;
+
static void __init sun4u_pgprot_init(void)
{
- unsigned long page_none, page_shared, page_copy, page_readonly;
- unsigned long page_exec_bit;
int i;
PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID |
@@ -3183,3 +3168,50 @@ void copy_highpage(struct page *to, struct page *from)
}
}
EXPORT_SYMBOL(copy_highpage);
+
+static inline 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_none);
+ case VM_READ:
+ return __pgprot(page_readonly & ~page_exec_bit);
+ case VM_WRITE:
+ case VM_WRITE | VM_READ:
+ return __pgprot(page_copy & ~page_exec_bit);
+ case VM_EXEC:
+ case VM_EXEC | VM_READ:
+ return __pgprot(page_readonly);
+ case VM_EXEC | VM_WRITE:
+ case VM_EXEC | VM_WRITE | VM_READ:
+ return __pgprot(page_copy);
+ case VM_SHARED:
+ return __pgprot(page_none);
+ case VM_SHARED | VM_READ:
+ return __pgprot(page_readonly & ~page_exec_bit);
+ case VM_SHARED | VM_WRITE:
+ case VM_SHARED | VM_WRITE | VM_READ:
+ return __pgprot(page_shared & ~page_exec_bit);
+ case VM_SHARED | VM_EXEC:
+ case VM_SHARED | VM_EXEC | VM_READ:
+ return __pgprot(page_readonly);
+ case VM_SHARED | VM_EXEC | VM_WRITE:
+ case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ:
+ return __pgprot(page_shared);
+ default:
+ BUILD_BUG();
+ }
+}
+
+static pgprot_t sparc_vm_get_page_prot(unsigned long vm_flags)
+{
+ return (vm_flags & VM_SPARC_ADI) ? __pgprot(_PAGE_MCD_4V) : __pgprot(0);
+}
+
+pgprot_t vm_get_page_prot(unsigned long vm_flags)
+{
+ return __pgprot(pgprot_val(__vm_get_page_prot(vm_flags)) |
+ pgprot_val(sparc_vm_get_page_prot(vm_flags)));
+
+}
+EXPORT_SYMBOL(vm_get_page_prot);
--
2.25.1
next prev parent reply other threads:[~2022-02-28 10:47 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-28 10:47 [OpenRISC] [PATCH V3 00/30] mm/mmap: Drop protection_map[] and platform's __SXXX/__PXXX requirements Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 01/30] mm/debug_vm_pgtable: Drop protection_map[] usage Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 02/30] mm/mmap: Clarify protection_map[] indices Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 03/30] mm/mmap: Add new config ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [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 ` [OpenRISC] [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 ` Anshuman Khandual [this message]
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 07/30] mips/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 08/30] m68k/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 09/30] arm/mm: " Anshuman Khandual
2022-02-28 10:57 ` Russell King
2022-02-28 13:49 ` Geert Uytterhoeven
2022-03-01 0:00 ` Anshuman Khandual
2022-03-01 0:31 ` Russell King
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
2022-03-02 3:15 ` Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 10/30] x86/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 11/30] mm/mmap: Drop protection_map[] Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 12/30] mm/mmap: Drop arch_filter_pgprot() Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 13/30] mm/mmap: Drop arch_vm_get_page_pgprot() Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 14/30] s390/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 15/30] riscv/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 16/30] alpha/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 17/30] sh/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 18/30] arc/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 19/30] csky/mm: " Anshuman Khandual
2022-03-01 14:00 ` Guo Ren
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 20/30] xtensa/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 21/30] parisc/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 22/30] openrisc/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 23/30] um/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 24/30] microblaze/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 25/30] nios2/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 26/30] hexagon/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 27/30] nds32/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 28/30] ia64/mm: " Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 29/30] mm/mmap: Drop generic vm_get_page_prot() Anshuman Khandual
2022-02-28 10:47 ` [OpenRISC] [PATCH V3 30/30] mm/mmap: Drop ARCH_HAS_VM_GET_PAGE_PROT Anshuman Khandual
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