[mirror_ubuntu-jammy-kernel.git] / arch / arm64 / include / asm / memory.h

/*
 * Based on arch/arm/include/asm/memory.h
 *
 * Copyright (C) 2000-2002 Russell King
 * Copyright (C) 2012 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/>.
 *
 * Note: this file should not be included by non-asm/.h files
 */
#ifndef __ASM_MEMORY_H
#define __ASM_MEMORY_H

#include <linux/compiler.h>
#include <linux/const.h>
#include <linux/types.h>
#include <asm/bug.h>
#include <asm/page-def.h>
#include <asm/sizes.h>

/*
 * Size of the PCI I/O space. This must remain a power of two so that
 * IO_SPACE_LIMIT acts as a mask for the low bits of I/O addresses.
 */
#define PCI_IO_SIZE		SZ_16M

/*
 * VMEMMAP_SIZE - allows the whole linear region to be covered by
 *                a struct page array
 */
#define VMEMMAP_SIZE (UL(1) << (VA_BITS - PAGE_SHIFT - 1 + STRUCT_PAGE_MAX_SHIFT))

/*
 * PAGE_OFFSET - the virtual address of the start of the linear map (top
 *		 (VA_BITS - 1))
 * KIMAGE_VADDR - the virtual address of the start of the kernel image
 * VA_BITS - the maximum number of bits for virtual addresses.
 * VA_START - the first kernel virtual address.
 */
#define VA_BITS			(CONFIG_ARM64_VA_BITS)
#define VA_START		(UL(0xffffffffffffffff) - \
	(UL(1) << VA_BITS) + 1)
#define PAGE_OFFSET		(UL(0xffffffffffffffff) - \
	(UL(1) << (VA_BITS - 1)) + 1)
#define KIMAGE_VADDR		(MODULES_END)
#define BPF_JIT_REGION_START	(VA_START + KASAN_SHADOW_SIZE)
#define BPF_JIT_REGION_SIZE	(SZ_128M)
#define BPF_JIT_REGION_END	(BPF_JIT_REGION_START + BPF_JIT_REGION_SIZE)
#define MODULES_END		(MODULES_VADDR + MODULES_VSIZE)
#define MODULES_VADDR		(BPF_JIT_REGION_END)
#define MODULES_VSIZE		(SZ_128M)
#define VMEMMAP_START		(PAGE_OFFSET - VMEMMAP_SIZE)
#define PCI_IO_END		(VMEMMAP_START - SZ_2M)
#define PCI_IO_START		(PCI_IO_END - PCI_IO_SIZE)
#define FIXADDR_TOP		(PCI_IO_START - SZ_2M)

#define KERNEL_START      _text
#define KERNEL_END        _end

#ifdef CONFIG_ARM64_USER_VA_BITS_52
#define MAX_USER_VA_BITS	52
#else
#define MAX_USER_VA_BITS	VA_BITS
#endif

/*
 * Generic and tag-based KASAN require 1/8th and 1/16th of the kernel virtual
 * address space for the shadow region respectively. They can bloat the stack
 * significantly, so double the (minimum) stack size when they are in use.
 */
#ifdef CONFIG_KASAN
#define KASAN_SHADOW_SIZE	(UL(1) << (VA_BITS - KASAN_SHADOW_SCALE_SHIFT))
#ifdef CONFIG_KASAN_EXTRA
#define KASAN_THREAD_SHIFT	2
#else
#define KASAN_THREAD_SHIFT	1
#endif /* CONFIG_KASAN_EXTRA */
#else
#define KASAN_SHADOW_SIZE	(0)
#define KASAN_THREAD_SHIFT	0
#endif

#define MIN_THREAD_SHIFT	(14 + KASAN_THREAD_SHIFT)

/*
 * VMAP'd stacks are allocated at page granularity, so we must ensure that such
 * stacks are a multiple of page size.
 */
#if defined(CONFIG_VMAP_STACK) && (MIN_THREAD_SHIFT < PAGE_SHIFT)
#define THREAD_SHIFT		PAGE_SHIFT
#else
#define THREAD_SHIFT		MIN_THREAD_SHIFT
#endif

#if THREAD_SHIFT >= PAGE_SHIFT
#define THREAD_SIZE_ORDER	(THREAD_SHIFT - PAGE_SHIFT)
#endif

#define THREAD_SIZE		(UL(1) << THREAD_SHIFT)

/*
 * By aligning VMAP'd stacks to 2 * THREAD_SIZE, we can detect overflow by
 * checking sp & (1 << THREAD_SHIFT), which we can do cheaply in the entry
 * assembly.
 */
#ifdef CONFIG_VMAP_STACK
#define THREAD_ALIGN		(2 * THREAD_SIZE)
#else
#define THREAD_ALIGN		THREAD_SIZE
#endif

#define IRQ_STACK_SIZE		THREAD_SIZE

#define OVERFLOW_STACK_SIZE	SZ_4K

/*
 * Alignment of kernel segments (e.g. .text, .data).
 */
#if defined(CONFIG_DEBUG_ALIGN_RODATA)
/*
 *  4 KB granule:   1 level 2 entry
 * 16 KB granule: 128 level 3 entries, with contiguous bit
 * 64 KB granule:  32 level 3 entries, with contiguous bit
 */
#define SEGMENT_ALIGN			SZ_2M
#else
/*
 *  4 KB granule:  16 level 3 entries, with contiguous bit
 * 16 KB granule:   4 level 3 entries, without contiguous bit
 * 64 KB granule:   1 level 3 entry
 */
#define SEGMENT_ALIGN			SZ_64K
#endif

/*
 * Memory types available.
 */
#define MT_DEVICE_nGnRnE	0
#define MT_DEVICE_nGnRE		1
#define MT_DEVICE_GRE		2
#define MT_NORMAL_NC		3
#define MT_NORMAL		4
#define MT_NORMAL_WT		5

/*
 * Memory types for Stage-2 translation
 */
#define MT_S2_NORMAL		0xf
#define MT_S2_DEVICE_nGnRE	0x1

/*
 * Memory types for Stage-2 translation when ID_AA64MMFR2_EL1.FWB is 0001
 * Stage-2 enforces Normal-WB and Device-nGnRE
 */
#define MT_S2_FWB_NORMAL	6
#define MT_S2_FWB_DEVICE_nGnRE	1

#ifdef CONFIG_ARM64_4K_PAGES
#define IOREMAP_MAX_ORDER	(PUD_SHIFT)
#else
#define IOREMAP_MAX_ORDER	(PMD_SHIFT)
#endif

#ifdef CONFIG_BLK_DEV_INITRD
#define __early_init_dt_declare_initrd(__start, __end)			\
	do {								\
		initrd_start = (__start);				\
		initrd_end = (__end);					\
	} while (0)
#endif

#ifndef __ASSEMBLY__

#include <linux/bitops.h>
#include <linux/mmdebug.h>

extern s64			memstart_addr;
/* PHYS_OFFSET - the physical address of the start of memory. */
#define PHYS_OFFSET		({ VM_BUG_ON(memstart_addr & 1); memstart_addr; })

/* the virtual base of the kernel image (minus TEXT_OFFSET) */
extern u64			kimage_vaddr;

/* the offset between the kernel virtual and physical mappings */
extern u64			kimage_voffset;

static inline unsigned long kaslr_offset(void)
{
	return kimage_vaddr - KIMAGE_VADDR;
}

/* the actual size of a user virtual address */
extern u64			vabits_user;

/*
 * Allow all memory at the discovery stage. We will clip it later.
 */
#define MIN_MEMBLOCK_ADDR	0
#define MAX_MEMBLOCK_ADDR	U64_MAX

/*
 * PFNs are used to describe any physical page; this means
 * PFN 0 == physical address 0.
 *
 * This is the PFN of the first RAM page in the kernel
 * direct-mapped view.  We assume this is the first page
 * of RAM in the mem_map as well.
 */
#define PHYS_PFN_OFFSET	(PHYS_OFFSET >> PAGE_SHIFT)

/*
 * When dealing with data aborts, watchpoints, or instruction traps we may end
 * up with a tagged userland pointer. Clear the tag to get a sane pointer to
 * pass on to access_ok(), for instance.
 */
#define untagged_addr(addr)	\
	((__typeof__(addr))sign_extend64((u64)(addr), 55))

#ifdef CONFIG_KASAN_SW_TAGS
#define __tag_shifted(tag)	((u64)(tag) << 56)
#define __tag_set(addr, tag)	(__typeof__(addr))( \
		((u64)(addr) & ~__tag_shifted(0xff)) | __tag_shifted(tag))
#define __tag_reset(addr)	untagged_addr(addr)
#define __tag_get(addr)		(__u8)((u64)(addr) >> 56)
#else
#define __tag_set(addr, tag)	(addr)
#define __tag_reset(addr)	(addr)
#define __tag_get(addr)		0
#endif

/*
 * Physical vs virtual RAM address space conversion.  These are
 * private definitions which should NOT be used outside memory.h
 * files.  Use virt_to_phys/phys_to_virt/__pa/__va instead.
 */


/*
 * The linear kernel range starts in the middle of the virtual adddress
 * space. Testing the top bit for the start of the region is a
 * sufficient check.
 */
#define __is_lm_address(addr)	(!!((addr) & BIT(VA_BITS - 1)))

#define __lm_to_phys(addr)	(((addr) & ~PAGE_OFFSET) + PHYS_OFFSET)
#define __kimg_to_phys(addr)	((addr) - kimage_voffset)

#define __virt_to_phys_nodebug(x) ({					\
	phys_addr_t __x = (phys_addr_t)(x);				\
	__is_lm_address(__x) ? __lm_to_phys(__x) :			\
			       __kimg_to_phys(__x);			\
})

#define __pa_symbol_nodebug(x)	__kimg_to_phys((phys_addr_t)(x))

#ifdef CONFIG_DEBUG_VIRTUAL
extern phys_addr_t __virt_to_phys(unsigned long x);
extern phys_addr_t __phys_addr_symbol(unsigned long x);
#else
#define __virt_to_phys(x)	__virt_to_phys_nodebug(x)
#define __phys_addr_symbol(x)	__pa_symbol_nodebug(x)
#endif

#define __phys_to_virt(x)	((unsigned long)((x) - PHYS_OFFSET) | PAGE_OFFSET)
#define __phys_to_kimg(x)	((unsigned long)((x) + kimage_voffset))

/*
 * Convert a page to/from a physical address
 */
#define page_to_phys(page)	(__pfn_to_phys(page_to_pfn(page)))
#define phys_to_page(phys)	(pfn_to_page(__phys_to_pfn(phys)))

/*
 * Note: Drivers should NOT use these.  They are the wrong
 * translation for translating DMA addresses.  Use the driver
 * DMA support - see dma-mapping.h.
 */
#define virt_to_phys virt_to_phys
static inline phys_addr_t virt_to_phys(const volatile void *x)
{
	return __virt_to_phys((unsigned long)(x));
}

#define phys_to_virt phys_to_virt
static inline void *phys_to_virt(phys_addr_t x)
{
	return (void *)(__phys_to_virt(x));
}

/*
 * Drivers should NOT use these either.
 */
#define __pa(x)			__virt_to_phys((unsigned long)(x))
#define __pa_symbol(x)		__phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
#define __pa_nodebug(x)		__virt_to_phys_nodebug((unsigned long)(x))
#define __va(x)			((void *)__phys_to_virt((phys_addr_t)(x)))
#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
#define virt_to_pfn(x)      __phys_to_pfn(__virt_to_phys((unsigned long)(x)))
#define sym_to_pfn(x)	    __phys_to_pfn(__pa_symbol(x))

/*
 *  virt_to_page(k)	convert a _valid_ virtual address to struct page *
 *  virt_addr_valid(k)	indicates whether a virtual address is valid
 */
#define ARCH_PFN_OFFSET		((unsigned long)PHYS_PFN_OFFSET)

#ifndef CONFIG_SPARSEMEM_VMEMMAP
#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define _virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#else
#define __virt_to_pgoff(kaddr)	(((u64)(kaddr) & ~PAGE_OFFSET) / PAGE_SIZE * sizeof(struct page))
#define __page_to_voff(kaddr)	(((u64)(kaddr) & ~VMEMMAP_START) * PAGE_SIZE / sizeof(struct page))

#define page_to_virt(page)	({					\
	unsigned long __addr =						\
		((__page_to_voff(page)) | PAGE_OFFSET);			\
	__addr = __tag_set(__addr, page_kasan_tag(page));		\
	((void *)__addr);						\
})

#define virt_to_page(vaddr)	((struct page *)((__virt_to_pgoff(vaddr)) | VMEMMAP_START))

#define _virt_addr_valid(kaddr)	pfn_valid((((u64)(kaddr) & ~PAGE_OFFSET) \
					   + PHYS_OFFSET) >> PAGE_SHIFT)
#endif
#endif

#define _virt_addr_is_linear(kaddr)	\
	(__tag_reset((u64)(kaddr)) >= PAGE_OFFSET)
#define virt_addr_valid(kaddr)		\
	(_virt_addr_is_linear(kaddr) && _virt_addr_valid(kaddr))

#include <asm-generic/memory_model.h>

#endif
Commit	Line	Data
4f04d8f0 CM	1	/*
	2	* Based on arch/arm/include/asm/memory.h
	3	*
	4	* Copyright (C) 2000-2002 Russell King
	5	* Copyright (C) 2012 ARM Ltd.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*
	19	* Note: this file should not be included by non-asm/.h files
	20	*/
	21	#ifndef __ASM_MEMORY_H
	22	#define __ASM_MEMORY_H
	23
	24	#include <linux/compiler.h>
	25	#include <linux/const.h>
	26	#include <linux/types.h>
a7f8de16	27	#include <asm/bug.h>
b6531456	28	#include <asm/page-def.h>
4f04d8f0 CM	29	#include <asm/sizes.h>
4f04d8f0 CM	30
aa03c428 MR	31	/*
	32	* Size of the PCI I/O space. This must remain a power of two so that
	33	* IO_SPACE_LIMIT acts as a mask for the low bits of I/O addresses.
	34	*/
	35	#define PCI_IO_SIZE SZ_16M
	36
3e1907d5 AB	37	/*
	38	* VMEMMAP_SIZE - allows the whole linear region to be covered by
	39	* a struct page array
	40	*/
	41	#define VMEMMAP_SIZE (UL(1) << (VA_BITS - PAGE_SHIFT - 1 + STRUCT_PAGE_MAX_SHIFT))
	42
4f04d8f0	43	/*
a13e3a5b	44	* PAGE_OFFSET - the virtual address of the start of the linear map (top
847264fb	45	* (VA_BITS - 1))
a13e3a5b	46	* KIMAGE_VADDR - the virtual address of the start of the kernel image
4f04d8f0	47	* VA_BITS - the maximum number of bits for virtual addresses.
127db024	48	* VA_START - the first kernel virtual address.
4f04d8f0	49	*/
e41ceed0	50	#define VA_BITS (CONFIG_ARM64_VA_BITS)
82cd5880 ND	51	#define VA_START (UL(0xffffffffffffffff) - \
	52	(UL(1) << VA_BITS) + 1)
	53	#define PAGE_OFFSET (UL(0xffffffffffffffff) - \
	54	(UL(1) << (VA_BITS - 1)) + 1)
f9040773	55	#define KIMAGE_VADDR (MODULES_END)
91fc957c AB	56	#define BPF_JIT_REGION_START (VA_START + KASAN_SHADOW_SIZE)
	57	#define BPF_JIT_REGION_SIZE (SZ_128M)
	58	#define BPF_JIT_REGION_END (BPF_JIT_REGION_START + BPF_JIT_REGION_SIZE)
f9040773	59	#define MODULES_END (MODULES_VADDR + MODULES_VSIZE)
91fc957c	60	#define MODULES_VADDR (BPF_JIT_REGION_END)
f80fb3a3	61	#define MODULES_VSIZE (SZ_128M)
3e1907d5 AB	62	#define VMEMMAP_START (PAGE_OFFSET - VMEMMAP_SIZE)
3e1907d5 AB	63	#define PCI_IO_END (VMEMMAP_START - SZ_2M)
aa03c428 MR	64	#define PCI_IO_START (PCI_IO_END - PCI_IO_SIZE)
aa03c428 MR	65	#define FIXADDR_TOP (PCI_IO_START - SZ_2M)
4f04d8f0	66
28c72583 JM	67	#define KERNEL_START _text
	68	#define KERNEL_END _end
	69
9b31cf49 WD	70	#ifdef CONFIG_ARM64_USER_VA_BITS_52
	71	#define MAX_USER_VA_BITS 52
	72	#else
	73	#define MAX_USER_VA_BITS VA_BITS
	74	#endif
	75
f9040773	76	/*
b2f557ea AK	77	* Generic and tag-based KASAN require 1/8th and 1/16th of the kernel virtual
	78	* address space for the shadow region respectively. They can bloat the stack
	79	* significantly, so double the (minimum) stack size when they are in use.
f9040773 AB	80	*/
f9040773 AB	81	#ifdef CONFIG_KASAN
917538e2	82	#define KASAN_SHADOW_SIZE (UL(1) << (VA_BITS - KASAN_SHADOW_SCALE_SHIFT))
6e883067 QC	83	#ifdef CONFIG_KASAN_EXTRA
	84	#define KASAN_THREAD_SHIFT 2
	85	#else
b02faed1	86	#define KASAN_THREAD_SHIFT 1
6e883067	87	#endif /* CONFIG_KASAN_EXTRA */
f9040773 AB	88	#else
f9040773 AB	89	#define KASAN_SHADOW_SIZE (0)
b02faed1	90	#define KASAN_THREAD_SHIFT 0
f9040773 AB	91	#endif
f9040773 AB	92
b02faed1	93	#define MIN_THREAD_SHIFT (14 + KASAN_THREAD_SHIFT)
e3067861 MR	94
	95	/*
	96	* VMAP'd stacks are allocated at page granularity, so we must ensure that such
	97	* stacks are a multiple of page size.
	98	*/
	99	#if defined(CONFIG_VMAP_STACK) && (MIN_THREAD_SHIFT < PAGE_SHIFT)
	100	#define THREAD_SHIFT PAGE_SHIFT
	101	#else
	102	#define THREAD_SHIFT MIN_THREAD_SHIFT
	103	#endif
dbc9344a MR	104
	105	#if THREAD_SHIFT >= PAGE_SHIFT
	106	#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)
	107	#endif
	108
	109	#define THREAD_SIZE (UL(1) << THREAD_SHIFT)
	110
e3067861 MR	111	/*
	112	* By aligning VMAP'd stacks to 2 * THREAD_SIZE, we can detect overflow by
	113	* checking sp & (1 << THREAD_SHIFT), which we can do cheaply in the entry
	114	* assembly.
	115	*/
	116	#ifdef CONFIG_VMAP_STACK
	117	#define THREAD_ALIGN (2 * THREAD_SIZE)
	118	#else
	119	#define THREAD_ALIGN THREAD_SIZE
	120	#endif
	121
f60ad4ed MR	122	#define IRQ_STACK_SIZE THREAD_SIZE
f60ad4ed MR	123
872d8327 MR	124	#define OVERFLOW_STACK_SIZE SZ_4K
872d8327 MR	125
8018ba4e MR	126	/*
	127	* Alignment of kernel segments (e.g. .text, .data).
	128	*/
	129	#if defined(CONFIG_DEBUG_ALIGN_RODATA)
	130	/*
	131	* 4 KB granule: 1 level 2 entry
	132	* 16 KB granule: 128 level 3 entries, with contiguous bit
	133	* 64 KB granule: 32 level 3 entries, with contiguous bit
	134	*/
	135	#define SEGMENT_ALIGN SZ_2M
	136	#else
	137	/*
	138	* 4 KB granule: 16 level 3 entries, with contiguous bit
	139	* 16 KB granule: 4 level 3 entries, without contiguous bit
	140	* 64 KB granule: 1 level 3 entry
	141	*/
	142	#define SEGMENT_ALIGN SZ_64K
	143	#endif
	144
4f04d8f0 CM	145	/*
	146	* Memory types available.
	147	*/
	148	#define MT_DEVICE_nGnRnE 0
	149	#define MT_DEVICE_nGnRE 1
	150	#define MT_DEVICE_GRE 2
	151	#define MT_NORMAL_NC 3
	152	#define MT_NORMAL 4
8d446c86	153	#define MT_NORMAL_WT 5
4f04d8f0	154
36311607 MZ	155	/*
	156	* Memory types for Stage-2 translation
	157	*/
	158	#define MT_S2_NORMAL 0xf
	159	#define MT_S2_DEVICE_nGnRE 0x1
	160
e48d53a9 MZ	161	/*
	162	* Memory types for Stage-2 translation when ID_AA64MMFR2_EL1.FWB is 0001
	163	* Stage-2 enforces Normal-WB and Device-nGnRE
	164	*/
	165	#define MT_S2_FWB_NORMAL 6
	166	#define MT_S2_FWB_DEVICE_nGnRE 1
	167
324420bf AB	168	#ifdef CONFIG_ARM64_4K_PAGES
	169	#define IOREMAP_MAX_ORDER (PUD_SHIFT)
	170	#else
	171	#define IOREMAP_MAX_ORDER (PMD_SHIFT)
	172	#endif
	173
a89dea58 AB	174	#ifdef CONFIG_BLK_DEV_INITRD
	175	#define __early_init_dt_declare_initrd(__start, __end) \
	176	do { \
	177	initrd_start = (__start); \
	178	initrd_end = (__end); \
	179	} while (0)
	180	#endif
	181
4f04d8f0 CM	182	#ifndef __ASSEMBLY__
4f04d8f0 CM	183
8439e62a	184	#include <linux/bitops.h>
a92405f0 AB	185	#include <linux/mmdebug.h>
a92405f0 AB	186
020d044f	187	extern s64 memstart_addr;
4f04d8f0	188	/* PHYS_OFFSET - the physical address of the start of memory. */
a92405f0	189	#define PHYS_OFFSET ({ VM_BUG_ON(memstart_addr & 1); memstart_addr; })
a7f8de16	190
f80fb3a3 AB	191	/* the virtual base of the kernel image (minus TEXT_OFFSET) */
	192	extern u64 kimage_vaddr;
	193
a7f8de16 AB	194	/* the offset between the kernel virtual and physical mappings */
a7f8de16 AB	195	extern u64 kimage_voffset;
4f04d8f0	196
7ede8665 AP	197	static inline unsigned long kaslr_offset(void)
	198	{
	199	return kimage_vaddr - KIMAGE_VADDR;
	200	}
	201
ec6e822d MR	202	/* the actual size of a user virtual address */
	203	extern u64 vabits_user;
	204
34ba2c42	205	/*
a7f8de16	206	* Allow all memory at the discovery stage. We will clip it later.
34ba2c42	207	*/
a7f8de16 AB	208	#define MIN_MEMBLOCK_ADDR 0
a7f8de16 AB	209	#define MAX_MEMBLOCK_ADDR U64_MAX
34ba2c42	210
4f04d8f0 CM	211	/*
	212	* PFNs are used to describe any physical page; this means
	213	* PFN 0 == physical address 0.
	214	*
	215	* This is the PFN of the first RAM page in the kernel
	216	* direct-mapped view. We assume this is the first page
	217	* of RAM in the mem_map as well.
	218	*/
	219	#define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT)
	220
9c23f847 AK	221	/*
	222	* When dealing with data aborts, watchpoints, or instruction traps we may end
	223	* up with a tagged userland pointer. Clear the tag to get a sane pointer to
	224	* pass on to access_ok(), for instance.
	225	*/
	226	#define untagged_addr(addr) \
	227	((__typeof__(addr))sign_extend64((u64)(addr), 55))
	228
3c9e3aa1 AK	229	#ifdef CONFIG_KASAN_SW_TAGS
	230	#define __tag_shifted(tag) ((u64)(tag) << 56)
	231	#define __tag_set(addr, tag) (__typeof__(addr))( \
	232	((u64)(addr) & ~__tag_shifted(0xff)) \| __tag_shifted(tag))
	233	#define __tag_reset(addr) untagged_addr(addr)
	234	#define __tag_get(addr) (__u8)((u64)(addr) >> 56)
	235	#else
	236	#define __tag_set(addr, tag) (addr)
	237	#define __tag_reset(addr) (addr)
	238	#define __tag_get(addr) 0
	239	#endif
	240
9e22eb61 LA	241	/*
	242	* Physical vs virtual RAM address space conversion. These are
	243	* private definitions which should NOT be used outside memory.h
	244	* files. Use virt_to_phys/phys_to_virt/__pa/__va instead.
	245	*/
ec6d06ef LA	246
	247
	248	/*
	249	* The linear kernel range starts in the middle of the virtual adddress
	250	* space. Testing the top bit for the start of the region is a
	251	* sufficient check.
	252	*/
	253	#define __is_lm_address(addr) (!!((addr) & BIT(VA_BITS - 1)))
	254
	255	#define __lm_to_phys(addr) (((addr) & ~PAGE_OFFSET) + PHYS_OFFSET)
	256	#define __kimg_to_phys(addr) ((addr) - kimage_voffset)
	257
	258	#define __virt_to_phys_nodebug(x) ({ \
9e22eb61	259	phys_addr_t __x = (phys_addr_t)(x); \
ec6d06ef LA	260	__is_lm_address(__x) ? __lm_to_phys(__x) : \
	261	__kimg_to_phys(__x); \
	262	})
	263
	264	#define __pa_symbol_nodebug(x) __kimg_to_phys((phys_addr_t)(x))
	265
	266	#ifdef CONFIG_DEBUG_VIRTUAL
	267	extern phys_addr_t __virt_to_phys(unsigned long x);
	268	extern phys_addr_t __phys_addr_symbol(unsigned long x);
	269	#else
	270	#define __virt_to_phys(x) __virt_to_phys_nodebug(x)
	271	#define __phys_addr_symbol(x) __pa_symbol_nodebug(x)
	272	#endif
9e22eb61 LA	273
	274	#define __phys_to_virt(x) ((unsigned long)((x) - PHYS_OFFSET) \| PAGE_OFFSET)
	275	#define __phys_to_kimg(x) ((unsigned long)((x) + kimage_voffset))
	276
	277	/*
	278	* Convert a page to/from a physical address
	279	*/
	280	#define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page)))
	281	#define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys)))
	282
4f04d8f0 CM	283	/*
	284	* Note: Drivers should NOT use these. They are the wrong
	285	* translation for translating DMA addresses. Use the driver
	286	* DMA support - see dma-mapping.h.
	287	*/
09a57239	288	#define virt_to_phys virt_to_phys
4f04d8f0 CM	289	static inline phys_addr_t virt_to_phys(const volatile void *x)
	290	{
	291	return __virt_to_phys((unsigned long)(x));
	292	}
	293
09a57239	294	#define phys_to_virt phys_to_virt
4f04d8f0 CM	295	static inline void *phys_to_virt(phys_addr_t x)
	296	{
	297	return (void *)(__phys_to_virt(x));
	298	}
	299
	300	/*
	301	* Drivers should NOT use these either.
	302	*/
	303	#define __pa(x) __virt_to_phys((unsigned long)(x))
ec6d06ef LA	304	#define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
ec6d06ef LA	305	#define __pa_nodebug(x) __virt_to_phys_nodebug((unsigned long)(x))
4f04d8f0 CM	306	#define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x)))
4f04d8f0 CM	307	#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
869dcfd1	308	#define virt_to_pfn(x) __phys_to_pfn(__virt_to_phys((unsigned long)(x)))
2077be67	309	#define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x))
4f04d8f0 CM	310
	311	/*
	312	* virt_to_page(k) convert a _valid_ virtual address to struct page *
	313	* virt_addr_valid(k) indicates whether a virtual address is valid
	314	*/
5fd6690c	315	#define ARCH_PFN_OFFSET ((unsigned long)PHYS_PFN_OFFSET)
4f04d8f0	316
9f287591	317	#ifndef CONFIG_SPARSEMEM_VMEMMAP
4f04d8f0	318	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
ca219452	319	#define _virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
9f287591 AB	320	#else
9f287591 AB	321	#define __virt_to_pgoff(kaddr) (((u64)(kaddr) & ~PAGE_OFFSET) / PAGE_SIZE * sizeof(struct page))
1c8a946b	322	#define __page_to_voff(kaddr) (((u64)(kaddr) & ~VMEMMAP_START) * PAGE_SIZE / sizeof(struct page))
9f287591	323
2813b9c0 AK	324	#define page_to_virt(page) ({ \
	325	unsigned long __addr = \
	326	((__page_to_voff(page)) \| PAGE_OFFSET); \
	327	__addr = __tag_set(__addr, page_kasan_tag(page)); \
	328	((void *)__addr); \
	329	})
	330
9f287591	331	#define virt_to_page(vaddr) ((struct page *)((__virt_to_pgoff(vaddr)) \| VMEMMAP_START))
4f04d8f0	332
ca219452	333	#define _virt_addr_valid(kaddr) pfn_valid((((u64)(kaddr) & ~PAGE_OFFSET) \
9f287591 AB	334	+ PHYS_OFFSET) >> PAGE_SHIFT)
9f287591 AB	335	#endif
4f04d8f0 CM	336	#endif
4f04d8f0 CM	337
e71fe3f9 AK	338	#define _virt_addr_is_linear(kaddr) \
	339	(__tag_reset((u64)(kaddr)) >= PAGE_OFFSET)
	340	#define virt_addr_valid(kaddr) \
	341	(_virt_addr_is_linear(kaddr) && _virt_addr_valid(kaddr))
ca219452	342
4f04d8f0 CM	343	#include <asm-generic/memory_model.h>
	344
	345	#endif