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loongarch/mm: enable ARCH_HAS_VM_GET_PAGE_PROT

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This enables ARCH_HAS_VM_GET_PAGE_PROT on the platform and exports
standard vm_get_page_prot() implementation via DECLARE_VM_GET_PAGE_PROT,
which looks up a private and static protection_map[] array.  Subsequently
all __SXXX and __PXXX macros can be dropped which are no longer needed.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Anshuman Khandual <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: WANG Xuerui <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Brian Cain <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Chris Zankel <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Dinh Nguyen <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Guo Ren <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: Jeff Dike <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: Russell King <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Cc: Stafford Horne <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vasily Gorbik <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
This commit is contained in:
Anshuman Khandual authored and akpm committed 2022-07-17 17:14:38 -07:00
1 parent fa3f9f4a91
commit f6d1e19c20
3 files changed
+47 -19
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arch/loongarch/Kconfig
+1
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@@ -9,6 +9,7 @@ config LOONGARCH
select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
select ARCH_HAS_PHYS_TO_DMA
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_VM_GET_PAGE_PROT
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_INLINE_READ_LOCK if !PREEMPTION
select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION
arch/loongarch/include/asm/pgtable-bits.h
-19
View File
@@ -83,25 +83,6 @@
_PAGE_GLOBAL | _PAGE_KERN | _CACHE_SUC)
#define PAGE_KERNEL_WUC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
_PAGE_GLOBAL | _PAGE_KERN | _CACHE_WUC)
#define __P000 __pgprot(_CACHE_CC | _PAGE_USER | _PAGE_PROTNONE | _PAGE_NO_EXEC | _PAGE_NO_READ)
#define __P001 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC)
#define __P010 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC)
#define __P011 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC)
#define __P100 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
#define __P101 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
#define __P110 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
#define __P111 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
#define __S000 __pgprot(_CACHE_CC | _PAGE_USER | _PAGE_PROTNONE | _PAGE_NO_EXEC | _PAGE_NO_READ)
#define __S001 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC)
#define __S010 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE)
#define __S011 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE)
#define __S100 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
#define __S101 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
#define __S110 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_WRITE)
#define __S111 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_WRITE)
#ifndef __ASSEMBLY__
#define pgprot_noncached pgprot_noncached
arch/loongarch/mm/cache.c
+46
View File
@@ -139,3 +139,49 @@ void cpu_cache_init(void)
shm_align_mask = PAGE_SIZE - 1;
}
static const pgprot_t protection_map[16] = {
[VM_NONE] = __pgprot(_CACHE_CC | _PAGE_USER |
_PAGE_PROTNONE | _PAGE_NO_EXEC |
_PAGE_NO_READ),
[VM_READ] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT |
_PAGE_NO_EXEC),
[VM_WRITE] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT |
_PAGE_NO_EXEC),
[VM_WRITE | VM_READ] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT |
_PAGE_NO_EXEC),
[VM_EXEC] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT),
[VM_EXEC | VM_READ] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT),
[VM_EXEC | VM_WRITE] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT),
[VM_EXEC | VM_WRITE | VM_READ] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT),
[VM_SHARED] = __pgprot(_CACHE_CC | _PAGE_USER |
_PAGE_PROTNONE | _PAGE_NO_EXEC |
_PAGE_NO_READ),
[VM_SHARED | VM_READ] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT |
_PAGE_NO_EXEC),
[VM_SHARED | VM_WRITE] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT |
_PAGE_NO_EXEC | _PAGE_WRITE),
[VM_SHARED | VM_WRITE | VM_READ] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT |
_PAGE_NO_EXEC | _PAGE_WRITE),
[VM_SHARED | VM_EXEC] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT),
[VM_SHARED | VM_EXEC | VM_READ] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT),
[VM_SHARED | VM_EXEC | VM_WRITE] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT |
_PAGE_WRITE),
[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = __pgprot(_CACHE_CC | _PAGE_VALID |
_PAGE_USER | _PAGE_PRESENT |
_PAGE_WRITE)
};
DECLARE_VM_GET_PAGE_PROT