[linux-2.6-block.git] / arch / arm64 / include / asm / pgtable-prot.h

/*
 * Copyright (C) 2016 ARM Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_PGTABLE_PROT_H
#define __ASM_PGTABLE_PROT_H

#include <asm/memory.h>
#include <asm/pgtable-hwdef.h>

#include <linux/const.h>

/*
 * Software defined PTE bits definition.
 */
#define PTE_VALID		(_AT(pteval_t, 1) << 0)
#define PTE_WRITE		(PTE_DBM)		 /* same as DBM (51) */
#define PTE_DIRTY		(_AT(pteval_t, 1) << 55)
#define PTE_SPECIAL		(_AT(pteval_t, 1) << 56)
#define PTE_PROT_NONE		(_AT(pteval_t, 1) << 58) /* only when !PTE_VALID */

#ifndef __ASSEMBLY__

#include <asm/pgtable-types.h>

#define _PROT_DEFAULT		(PTE_TYPE_PAGE | PTE_AF | PTE_SHARED)
#define _PROT_SECT_DEFAULT	(PMD_TYPE_SECT | PMD_SECT_AF | PMD_SECT_S)

#define PTE_MAYBE_NG		(arm64_kernel_use_ng_mappings() ? PTE_NG : 0)
#define PMD_MAYBE_NG		(arm64_kernel_use_ng_mappings() ? PMD_SECT_NG : 0)

#define PROT_DEFAULT		(_PROT_DEFAULT | PTE_MAYBE_NG)
#define PROT_SECT_DEFAULT	(_PROT_SECT_DEFAULT | PMD_MAYBE_NG)

#define PROT_DEVICE_nGnRnE	(PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_DIRTY | PTE_WRITE | PTE_ATTRINDX(MT_DEVICE_nGnRnE))
#define PROT_DEVICE_nGnRE	(PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_DIRTY | PTE_WRITE | PTE_ATTRINDX(MT_DEVICE_nGnRE))
#define PROT_NORMAL_NC		(PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_DIRTY | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_NC))
#define PROT_NORMAL_WT		(PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_DIRTY | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_WT))
#define PROT_NORMAL		(PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_DIRTY | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL))

#define PROT_SECT_DEVICE_nGnRE	(PROT_SECT_DEFAULT | PMD_SECT_PXN | PMD_SECT_UXN | PMD_ATTRINDX(MT_DEVICE_nGnRE))
#define PROT_SECT_NORMAL	(PROT_SECT_DEFAULT | PMD_SECT_PXN | PMD_SECT_UXN | PMD_ATTRINDX(MT_NORMAL))
#define PROT_SECT_NORMAL_EXEC	(PROT_SECT_DEFAULT | PMD_SECT_UXN | PMD_ATTRINDX(MT_NORMAL))

#define _PAGE_DEFAULT		(_PROT_DEFAULT | PTE_ATTRINDX(MT_NORMAL))
#define _HYP_PAGE_DEFAULT	_PAGE_DEFAULT

#define PAGE_KERNEL		__pgprot(PROT_NORMAL)
#define PAGE_KERNEL_RO		__pgprot((PROT_NORMAL & ~PTE_WRITE) | PTE_RDONLY)
#define PAGE_KERNEL_ROX		__pgprot((PROT_NORMAL & ~(PTE_WRITE | PTE_PXN)) | PTE_RDONLY)
#define PAGE_KERNEL_EXEC	__pgprot(PROT_NORMAL & ~PTE_PXN)
#define PAGE_KERNEL_EXEC_CONT	__pgprot((PROT_NORMAL & ~PTE_PXN) | PTE_CONT)

#define PAGE_HYP		__pgprot(_HYP_PAGE_DEFAULT | PTE_HYP | PTE_HYP_XN)
#define PAGE_HYP_EXEC		__pgprot(_HYP_PAGE_DEFAULT | PTE_HYP | PTE_RDONLY)
#define PAGE_HYP_RO		__pgprot(_HYP_PAGE_DEFAULT | PTE_HYP | PTE_RDONLY | PTE_HYP_XN)
#define PAGE_HYP_DEVICE		__pgprot(PROT_DEVICE_nGnRE | PTE_HYP)

#define PAGE_S2_MEMATTR(attr)						\
	({								\
		u64 __val;						\
		if (cpus_have_const_cap(ARM64_HAS_STAGE2_FWB))		\
			__val = PTE_S2_MEMATTR(MT_S2_FWB_ ## attr);	\
		else							\
			__val = PTE_S2_MEMATTR(MT_S2_ ## attr);		\
		__val;							\
	 })

#define PAGE_S2_XN							\
	({								\
		u64 __val;						\
		if (cpus_have_const_cap(ARM64_HAS_CACHE_DIC))		\
			__val = 0;					\
		else							\
			__val = PTE_S2_XN;				\
		__val;							\
	})

#define PAGE_S2			__pgprot(_PROT_DEFAULT | PAGE_S2_MEMATTR(NORMAL) | PTE_S2_RDONLY | PAGE_S2_XN)
#define PAGE_S2_DEVICE		__pgprot(_PROT_DEFAULT | PAGE_S2_MEMATTR(DEVICE_nGnRE) | PTE_S2_RDONLY | PAGE_S2_XN)

#define PAGE_NONE		__pgprot(((_PAGE_DEFAULT) & ~PTE_VALID) | PTE_PROT_NONE | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_UXN)
#define PAGE_SHARED		__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_WRITE)
#define PAGE_SHARED_EXEC	__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_WRITE)
#define PAGE_READONLY		__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_UXN)
#define PAGE_READONLY_EXEC	__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN)
#define PAGE_EXECONLY		__pgprot(_PAGE_DEFAULT | PTE_RDONLY | PTE_NG | PTE_PXN)

#define __P000  PAGE_NONE
#define __P001  PAGE_READONLY
#define __P010  PAGE_READONLY
#define __P011  PAGE_READONLY
#define __P100  PAGE_EXECONLY
#define __P101  PAGE_READONLY_EXEC
#define __P110  PAGE_READONLY_EXEC
#define __P111  PAGE_READONLY_EXEC

#define __S000  PAGE_NONE
#define __S001  PAGE_READONLY
#define __S010  PAGE_SHARED
#define __S011  PAGE_SHARED
#define __S100  PAGE_EXECONLY
#define __S101  PAGE_READONLY_EXEC
#define __S110  PAGE_SHARED_EXEC
#define __S111  PAGE_SHARED_EXEC

#endif /* __ASSEMBLY__ */

#endif /* __ASM_PGTABLE_PROT_H */
Commit	Line	Data
3eca86e7 MR	1	/*
	2	* Copyright (C) 2016 ARM Ltd.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	15	*/
	16	#ifndef __ASM_PGTABLE_PROT_H
	17	#define __ASM_PGTABLE_PROT_H
	18
	19	#include <asm/memory.h>
	20	#include <asm/pgtable-hwdef.h>
	21
	22	#include <linux/const.h>
	23
	24	/*
	25	* Software defined PTE bits definition.
	26	*/
	27	#define PTE_VALID (_AT(pteval_t, 1) << 0)
	28	#define PTE_WRITE (PTE_DBM) /* same as DBM (51) */
	29	#define PTE_DIRTY (_AT(pteval_t, 1) << 55)
	30	#define PTE_SPECIAL (_AT(pteval_t, 1) << 56)
	31	#define PTE_PROT_NONE (_AT(pteval_t, 1) << 58) /* only when !PTE_VALID */
	32
	33	#ifndef __ASSEMBLY__
	34
	35	#include <asm/pgtable-types.h>
	36
e046eb0c WD	37	#define _PROT_DEFAULT (PTE_TYPE_PAGE \| PTE_AF \| PTE_SHARED)
	38	#define _PROT_SECT_DEFAULT (PMD_TYPE_SECT \| PMD_SECT_AF \| PMD_SECT_S)
	39
b89d82ef WD	40	#define PTE_MAYBE_NG (arm64_kernel_use_ng_mappings() ? PTE_NG : 0)
b89d82ef WD	41	#define PMD_MAYBE_NG (arm64_kernel_use_ng_mappings() ? PMD_SECT_NG : 0)
41acec62 WD	42
	43	#define PROT_DEFAULT (_PROT_DEFAULT \| PTE_MAYBE_NG)
	44	#define PROT_SECT_DEFAULT (_PROT_SECT_DEFAULT \| PMD_MAYBE_NG)
3eca86e7 MR	45
	46	#define PROT_DEVICE_nGnRnE (PROT_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_DIRTY \| PTE_WRITE \| PTE_ATTRINDX(MT_DEVICE_nGnRnE))
	47	#define PROT_DEVICE_nGnRE (PROT_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_DIRTY \| PTE_WRITE \| PTE_ATTRINDX(MT_DEVICE_nGnRE))
	48	#define PROT_NORMAL_NC (PROT_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_DIRTY \| PTE_WRITE \| PTE_ATTRINDX(MT_NORMAL_NC))
	49	#define PROT_NORMAL_WT (PROT_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_DIRTY \| PTE_WRITE \| PTE_ATTRINDX(MT_NORMAL_WT))
	50	#define PROT_NORMAL (PROT_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_DIRTY \| PTE_WRITE \| PTE_ATTRINDX(MT_NORMAL))
	51
	52	#define PROT_SECT_DEVICE_nGnRE (PROT_SECT_DEFAULT \| PMD_SECT_PXN \| PMD_SECT_UXN \| PMD_ATTRINDX(MT_DEVICE_nGnRE))
	53	#define PROT_SECT_NORMAL (PROT_SECT_DEFAULT \| PMD_SECT_PXN \| PMD_SECT_UXN \| PMD_ATTRINDX(MT_NORMAL))
	54	#define PROT_SECT_NORMAL_EXEC (PROT_SECT_DEFAULT \| PMD_SECT_UXN \| PMD_ATTRINDX(MT_NORMAL))
	55
41acec62 WD	56	#define _PAGE_DEFAULT (_PROT_DEFAULT \| PTE_ATTRINDX(MT_NORMAL))
41acec62 WD	57	#define _HYP_PAGE_DEFAULT _PAGE_DEFAULT
3eca86e7	58
41acec62 WD	59	#define PAGE_KERNEL __pgprot(PROT_NORMAL)
	60	#define PAGE_KERNEL_RO __pgprot((PROT_NORMAL & ~PTE_WRITE) \| PTE_RDONLY)
	61	#define PAGE_KERNEL_ROX __pgprot((PROT_NORMAL & ~(PTE_WRITE \| PTE_PXN)) \| PTE_RDONLY)
	62	#define PAGE_KERNEL_EXEC __pgprot(PROT_NORMAL & ~PTE_PXN)
	63	#define PAGE_KERNEL_EXEC_CONT __pgprot((PROT_NORMAL & ~PTE_PXN) \| PTE_CONT)
3eca86e7	64
e046eb0c WD	65	#define PAGE_HYP __pgprot(_HYP_PAGE_DEFAULT \| PTE_HYP \| PTE_HYP_XN)
	66	#define PAGE_HYP_EXEC __pgprot(_HYP_PAGE_DEFAULT \| PTE_HYP \| PTE_RDONLY)
	67	#define PAGE_HYP_RO __pgprot(_HYP_PAGE_DEFAULT \| PTE_HYP \| PTE_RDONLY \| PTE_HYP_XN)
3eca86e7 MR	68	#define PAGE_HYP_DEVICE __pgprot(PROT_DEVICE_nGnRE \| PTE_HYP)
3eca86e7 MR	69
e48d53a9 MZ	70	#define PAGE_S2_MEMATTR(attr) \
	71	({ \
	72	u64 __val; \
	73	if (cpus_have_const_cap(ARM64_HAS_STAGE2_FWB)) \
	74	__val = PTE_S2_MEMATTR(MT_S2_FWB_ ## attr); \
	75	else \
	76	__val = PTE_S2_MEMATTR(MT_S2_ ## attr); \
	77	__val; \
	78	})
	79
2f6ea23f MZ	80	#define PAGE_S2_XN \
	81	({ \
	82	u64 __val; \
	83	if (cpus_have_const_cap(ARM64_HAS_CACHE_DIC)) \
	84	__val = 0; \
	85	else \
	86	__val = PTE_S2_XN; \
	87	__val; \
	88	})
	89
	90	#define PAGE_S2 __pgprot(_PROT_DEFAULT \| PAGE_S2_MEMATTR(NORMAL) \| PTE_S2_RDONLY \| PAGE_S2_XN)
	91	#define PAGE_S2_DEVICE __pgprot(_PROT_DEFAULT \| PAGE_S2_MEMATTR(DEVICE_nGnRE) \| PTE_S2_RDONLY \| PAGE_S2_XN)
3eca86e7	92
e046eb0c	93	#define PAGE_NONE __pgprot(((_PAGE_DEFAULT) & ~PTE_VALID) \| PTE_PROT_NONE \| PTE_RDONLY \| PTE_NG \| PTE_PXN \| PTE_UXN)
3eca86e7 MR	94	#define PAGE_SHARED __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN \| PTE_WRITE)
3eca86e7 MR	95	#define PAGE_SHARED_EXEC __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_WRITE)
73e86cb0 CM	96	#define PAGE_READONLY __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_RDONLY \| PTE_NG \| PTE_PXN \| PTE_UXN)
	97	#define PAGE_READONLY_EXEC __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_RDONLY \| PTE_NG \| PTE_PXN)
	98	#define PAGE_EXECONLY __pgprot(_PAGE_DEFAULT \| PTE_RDONLY \| PTE_NG \| PTE_PXN)
3eca86e7 MR	99
	100	#define __P000 PAGE_NONE
	101	#define __P001 PAGE_READONLY
73e86cb0 CM	102	#define __P010 PAGE_READONLY
73e86cb0 CM	103	#define __P011 PAGE_READONLY
cab15ce6	104	#define __P100 PAGE_EXECONLY
3eca86e7	105	#define __P101 PAGE_READONLY_EXEC
73e86cb0 CM	106	#define __P110 PAGE_READONLY_EXEC
73e86cb0 CM	107	#define __P111 PAGE_READONLY_EXEC
3eca86e7 MR	108
	109	#define __S000 PAGE_NONE
	110	#define __S001 PAGE_READONLY
	111	#define __S010 PAGE_SHARED
	112	#define __S011 PAGE_SHARED
cab15ce6	113	#define __S100 PAGE_EXECONLY
3eca86e7 MR	114	#define __S101 PAGE_READONLY_EXEC
	115	#define __S110 PAGE_SHARED_EXEC
	116	#define __S111 PAGE_SHARED_EXEC
	117
	118	#endif /* __ASSEMBLY__ */
	119
	120	#endif /* __ASM_PGTABLE_PROT_H */