Commit e4e4b99b authored by Anshuman Khandual's avatar Anshuman Khandual Committed by Andrew Morton
Browse files

openrisc/mm: enable ARCH_HAS_VM_GET_PAGE_PROT 

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/20220711070600.2378316-11-anshuman.khandual@arm.com


Signed-off-by: default avatarAnshuman Khandual <anshuman.khandual@arm.com>
Acked-by: default avatarStafford Horne <shorne@gmail.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Brian Cain <bcain@quicinc.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@kernel.org>
Cc: WANG Xuerui <kernel@xen0n.name>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent f6d1e19c

arch/openrisc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ config OPENRISC 
	select ARCH_HAS_DMA_SET_UNCACHED

	select ARCH_HAS_DMA_CLEAR_UNCACHED

	select ARCH_HAS_SYNC_DMA_FOR_DEVICE

	select ARCH_HAS_VM_GET_PAGE_PROT

	select COMMON_CLK

	select OF

	select OF_EARLY_FLATTREE

arch/openrisc/include/asm/pgtable.h

+0 −18
Original line number Diff line number Diff line
@@ -176,24 +176,6 @@ extern void paging_init(void); 
	__pgprot(_PAGE_ALL | _PAGE_SRE | _PAGE_SWE \

		 | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC | _PAGE_CI)



#define __P000	PAGE_NONE

#define __P001	PAGE_READONLY_X

#define __P010	PAGE_COPY

#define __P011	PAGE_COPY_X

#define __P100	PAGE_READONLY

#define __P101	PAGE_READONLY_X

#define __P110	PAGE_COPY

#define __P111	PAGE_COPY_X



#define __S000	PAGE_NONE

#define __S001	PAGE_READONLY_X

#define __S010	PAGE_SHARED

#define __S011	PAGE_SHARED_X

#define __S100	PAGE_READONLY

#define __S101	PAGE_READONLY_X

#define __S110	PAGE_SHARED

#define __S111	PAGE_SHARED_X



/* zero page used for uninitialized stuff */

extern unsigned long empty_zero_page[2048];

#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))

arch/openrisc/mm/init.c

+20 −0
Original line number Diff line number Diff line
@@ -208,3 +208,23 @@ void __init mem_init(void) 
	mem_init_done = 1;

	return;

}



static const pgprot_t protection_map[16] = {

	[VM_NONE]					= PAGE_NONE,

	[VM_READ]					= PAGE_READONLY_X,

	[VM_WRITE]					= PAGE_COPY,

	[VM_WRITE | VM_READ]				= PAGE_COPY_X,

	[VM_EXEC]					= PAGE_READONLY,

	[VM_EXEC | VM_READ]				= PAGE_READONLY_X,

	[VM_EXEC | VM_WRITE]				= PAGE_COPY,

	[VM_EXEC | VM_WRITE | VM_READ]			= PAGE_COPY_X,

	[VM_SHARED]					= PAGE_NONE,

	[VM_SHARED | VM_READ]				= PAGE_READONLY_X,

	[VM_SHARED | VM_WRITE]				= PAGE_SHARED,

	[VM_SHARED | VM_WRITE | VM_READ]		= PAGE_SHARED_X,

	[VM_SHARED | VM_EXEC]				= PAGE_READONLY,

	[VM_SHARED | VM_EXEC | VM_READ]			= PAGE_READONLY_X,

	[VM_SHARED | VM_EXEC | VM_WRITE]		= PAGE_SHARED,

	[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ]	= PAGE_SHARED_X

};

DECLARE_VM_GET_PAGE_PROT