[mirror_qemu.git] / include / exec / ram_addr.h

/*
 * Declarations for cpu physical memory functions
 *
 * Copyright 2011 Red Hat, Inc. and/or its affiliates
 *
 * Authors:
 *  Avi Kivity <avi@redhat.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or
 * later.  See the COPYING file in the top-level directory.
 *
 */

/*
 * This header is for use by exec.c and memory.c ONLY.  Do not include it.
 * The functions declared here will be removed soon.
 */

#ifndef RAM_ADDR_H
#define RAM_ADDR_H

#ifndef CONFIG_USER_ONLY
#include "hw/xen/xen.h"
#include "exec/ramlist.h"

struct RAMBlock {
    struct rcu_head rcu;
    struct MemoryRegion *mr;
    uint8_t *host;
    ram_addr_t offset;
    ram_addr_t used_length;
    ram_addr_t max_length;
    void (*resized)(const char*, uint64_t length, void *host);
    uint32_t flags;
    /* Protected by iothread lock.  */
    char idstr[256];
    /* RCU-enabled, writes protected by the ramlist lock */
    QLIST_ENTRY(RAMBlock) next;
    QLIST_HEAD(, RAMBlockNotifier) ramblock_notifiers;
    int fd;
    size_t page_size;
    /* dirty bitmap used during migration */
    unsigned long *bmap;
    /* bitmap of pages that haven't been sent even once
     * only maintained and used in postcopy at the moment
     * where it's used to send the dirtymap at the start
     * of the postcopy phase
     */
    unsigned long *unsentmap;
};

static inline bool offset_in_ramblock(RAMBlock *b, ram_addr_t offset)
{
    return (b && b->host && offset < b->used_length) ? true : false;
}

static inline void *ramblock_ptr(RAMBlock *block, ram_addr_t offset)
{
    assert(offset_in_ramblock(block, offset));
    return (char *)block->host + offset;
}

long qemu_getrampagesize(void);
unsigned long last_ram_page(void);
RAMBlock *qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
                                   bool share, const char *mem_path,
                                   Error **errp);
RAMBlock *qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
                                  MemoryRegion *mr, Error **errp);
RAMBlock *qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr, Error **errp);
RAMBlock *qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t max_size,
                                    void (*resized)(const char*,
                                                    uint64_t length,
                                                    void *host),
                                    MemoryRegion *mr, Error **errp);
void qemu_ram_free(RAMBlock *block);

int qemu_ram_resize(RAMBlock *block, ram_addr_t newsize, Error **errp);

#define DIRTY_CLIENTS_ALL     ((1 << DIRTY_MEMORY_NUM) - 1)
#define DIRTY_CLIENTS_NOCODE  (DIRTY_CLIENTS_ALL & ~(1 << DIRTY_MEMORY_CODE))

static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
                                                 ram_addr_t length,
                                                 unsigned client)
{
    DirtyMemoryBlocks *blocks;
    unsigned long end, page;
    unsigned long idx, offset, base;
    bool dirty = false;

    assert(client < DIRTY_MEMORY_NUM);

    end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
    page = start >> TARGET_PAGE_BITS;

    rcu_read_lock();

    blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);

    idx = page / DIRTY_MEMORY_BLOCK_SIZE;
    offset = page % DIRTY_MEMORY_BLOCK_SIZE;
    base = page - offset;
    while (page < end) {
        unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);
        unsigned long num = next - base;
        unsigned long found = find_next_bit(blocks->blocks[idx], num, offset);
        if (found < num) {
            dirty = true;
            break;
        }

        page = next;
        idx++;
        offset = 0;
        base += DIRTY_MEMORY_BLOCK_SIZE;
    }

    rcu_read_unlock();

    return dirty;
}

static inline bool cpu_physical_memory_all_dirty(ram_addr_t start,
                                                 ram_addr_t length,
                                                 unsigned client)
{
    DirtyMemoryBlocks *blocks;
    unsigned long end, page;
    unsigned long idx, offset, base;
    bool dirty = true;

    assert(client < DIRTY_MEMORY_NUM);

    end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
    page = start >> TARGET_PAGE_BITS;

    rcu_read_lock();

    blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);

    idx = page / DIRTY_MEMORY_BLOCK_SIZE;
    offset = page % DIRTY_MEMORY_BLOCK_SIZE;
    base = page - offset;
    while (page < end) {
        unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);
        unsigned long num = next - base;
        unsigned long found = find_next_zero_bit(blocks->blocks[idx], num, offset);
        if (found < num) {
            dirty = false;
            break;
        }

        page = next;
        idx++;
        offset = 0;
        base += DIRTY_MEMORY_BLOCK_SIZE;
    }

    rcu_read_unlock();

    return dirty;
}

static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
                                                      unsigned client)
{
    return cpu_physical_memory_get_dirty(addr, 1, client);
}

static inline bool cpu_physical_memory_is_clean(ram_addr_t addr)
{
    bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA);
    bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE);
    bool migration =
        cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
    return !(vga && code && migration);
}

static inline uint8_t cpu_physical_memory_range_includes_clean(ram_addr_t start,
                                                               ram_addr_t length,
                                                               uint8_t mask)
{
    uint8_t ret = 0;

    if (mask & (1 << DIRTY_MEMORY_VGA) &&
        !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_VGA)) {
        ret |= (1 << DIRTY_MEMORY_VGA);
    }
    if (mask & (1 << DIRTY_MEMORY_CODE) &&
        !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_CODE)) {
        ret |= (1 << DIRTY_MEMORY_CODE);
    }
    if (mask & (1 << DIRTY_MEMORY_MIGRATION) &&
        !cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_MIGRATION)) {
        ret |= (1 << DIRTY_MEMORY_MIGRATION);
    }
    return ret;
}

static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
                                                      unsigned client)
{
    unsigned long page, idx, offset;
    DirtyMemoryBlocks *blocks;

    assert(client < DIRTY_MEMORY_NUM);

    page = addr >> TARGET_PAGE_BITS;
    idx = page / DIRTY_MEMORY_BLOCK_SIZE;
    offset = page % DIRTY_MEMORY_BLOCK_SIZE;

    rcu_read_lock();

    blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);

    set_bit_atomic(offset, blocks->blocks[idx]);

    rcu_read_unlock();
}

static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
                                                       ram_addr_t length,
                                                       uint8_t mask)
{
    DirtyMemoryBlocks *blocks[DIRTY_MEMORY_NUM];
    unsigned long end, page;
    unsigned long idx, offset, base;
    int i;

    if (!mask && !xen_enabled()) {
        return;
    }

    end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
    page = start >> TARGET_PAGE_BITS;

    rcu_read_lock();

    for (i = 0; i < DIRTY_MEMORY_NUM; i++) {
        blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i]);
    }

    idx = page / DIRTY_MEMORY_BLOCK_SIZE;
    offset = page % DIRTY_MEMORY_BLOCK_SIZE;
    base = page - offset;
    while (page < end) {
        unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);

        if (likely(mask & (1 << DIRTY_MEMORY_MIGRATION))) {
            bitmap_set_atomic(blocks[DIRTY_MEMORY_MIGRATION]->blocks[idx],
                              offset, next - page);
        }
        if (unlikely(mask & (1 << DIRTY_MEMORY_VGA))) {
            bitmap_set_atomic(blocks[DIRTY_MEMORY_VGA]->blocks[idx],
                              offset, next - page);
        }
        if (unlikely(mask & (1 << DIRTY_MEMORY_CODE))) {
            bitmap_set_atomic(blocks[DIRTY_MEMORY_CODE]->blocks[idx],
                              offset, next - page);
        }

        page = next;
        idx++;
        offset = 0;
        base += DIRTY_MEMORY_BLOCK_SIZE;
    }

    rcu_read_unlock();

    xen_hvm_modified_memory(start, length);
}

#if !defined(_WIN32)
static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
                                                          ram_addr_t start,
                                                          ram_addr_t pages)
{
    unsigned long i, j;
    unsigned long page_number, c;
    hwaddr addr;
    ram_addr_t ram_addr;
    unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
    unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
    unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);

    /* start address is aligned at the start of a word? */
    if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) &&
        (hpratio == 1)) {
        unsigned long **blocks[DIRTY_MEMORY_NUM];
        unsigned long idx;
        unsigned long offset;
        long k;
        long nr = BITS_TO_LONGS(pages);

        idx = (start >> TARGET_PAGE_BITS) / DIRTY_MEMORY_BLOCK_SIZE;
        offset = BIT_WORD((start >> TARGET_PAGE_BITS) %
                          DIRTY_MEMORY_BLOCK_SIZE);

        rcu_read_lock();

        for (i = 0; i < DIRTY_MEMORY_NUM; i++) {
            blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i])->blocks;
        }

        for (k = 0; k < nr; k++) {
            if (bitmap[k]) {
                unsigned long temp = leul_to_cpu(bitmap[k]);

                atomic_or(&blocks[DIRTY_MEMORY_MIGRATION][idx][offset], temp);
                atomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp);
                if (tcg_enabled()) {
                    atomic_or(&blocks[DIRTY_MEMORY_CODE][idx][offset], temp);
                }
            }

            if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) {
                offset = 0;
                idx++;
            }
        }

        rcu_read_unlock();

        xen_hvm_modified_memory(start, pages << TARGET_PAGE_BITS);
    } else {
        uint8_t clients = tcg_enabled() ? DIRTY_CLIENTS_ALL : DIRTY_CLIENTS_NOCODE;
        /*
         * bitmap-traveling is faster than memory-traveling (for addr...)
         * especially when most of the memory is not dirty.
         */
        for (i = 0; i < len; i++) {
            if (bitmap[i] != 0) {
                c = leul_to_cpu(bitmap[i]);
                do {
                    j = ctzl(c);
                    c &= ~(1ul << j);
                    page_number = (i * HOST_LONG_BITS + j) * hpratio;
                    addr = page_number * TARGET_PAGE_SIZE;
                    ram_addr = start + addr;
                    cpu_physical_memory_set_dirty_range(ram_addr,
                                       TARGET_PAGE_SIZE * hpratio, clients);
                } while (c != 0);
            }
        }
    }
}
#endif /* not _WIN32 */

bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start,
                                              ram_addr_t length,
                                              unsigned client);

DirtyBitmapSnapshot *cpu_physical_memory_snapshot_and_clear_dirty
    (ram_addr_t start, ram_addr_t length, unsigned client);

bool cpu_physical_memory_snapshot_get_dirty(DirtyBitmapSnapshot *snap,
                                            ram_addr_t start,
                                            ram_addr_t length);

static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
                                                         ram_addr_t length)
{
    cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_MIGRATION);
    cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_VGA);
    cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_CODE);
}


static inline
uint64_t cpu_physical_memory_sync_dirty_bitmap(RAMBlock *rb,
                                               ram_addr_t start,
                                               ram_addr_t length,
                                               uint64_t *real_dirty_pages)
{
    ram_addr_t addr;
    unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
    uint64_t num_dirty = 0;
    unsigned long *dest = rb->bmap;

    /* start address is aligned at the start of a word? */
    if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) {
        int k;
        int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS);
        unsigned long * const *src;
        unsigned long idx = (page * BITS_PER_LONG) / DIRTY_MEMORY_BLOCK_SIZE;
        unsigned long offset = BIT_WORD((page * BITS_PER_LONG) %
                                        DIRTY_MEMORY_BLOCK_SIZE);

        rcu_read_lock();

        src = atomic_rcu_read(
                &ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION])->blocks;

        for (k = page; k < page + nr; k++) {
            if (src[idx][offset]) {
                unsigned long bits = atomic_xchg(&src[idx][offset], 0);
                unsigned long new_dirty;
                *real_dirty_pages += ctpopl(bits);
                new_dirty = ~dest[k];
                dest[k] |= bits;
                new_dirty &= bits;
                num_dirty += ctpopl(new_dirty);
            }

            if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) {
                offset = 0;
                idx++;
            }
        }

        rcu_read_unlock();
    } else {
        for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) {
            if (cpu_physical_memory_test_and_clear_dirty(
                        start + addr,
                        TARGET_PAGE_SIZE,
                        DIRTY_MEMORY_MIGRATION)) {
                *real_dirty_pages += 1;
                long k = (start + addr) >> TARGET_PAGE_BITS;
                if (!test_and_set_bit(k, dest)) {
                    num_dirty++;
                }
            }
        }
    }

    return num_dirty;
}
#endif
#endif
Commit	Line	Data
220c3ebd JQ	1	/*
	2	* Declarations for cpu physical memory functions
	3	*
	4	* Copyright 2011 Red Hat, Inc. and/or its affiliates
	5	*
	6	* Authors:
	7	* Avi Kivity <avi@redhat.com>
	8	*
	9	* This work is licensed under the terms of the GNU GPL, version 2 or
	10	* later. See the COPYING file in the top-level directory.
	11	*
	12	*/
	13
	14	/*
	15	* This header is for use by exec.c and memory.c ONLY. Do not include it.
	16	* The functions declared here will be removed soon.
	17	*/
	18
	19	#ifndef RAM_ADDR_H
	20	#define RAM_ADDR_H
	21
	22	#ifndef CONFIG_USER_ONLY
	23	#include "hw/xen/xen.h"
0987d735	24	#include "exec/ramlist.h"
220c3ebd	25
3c9589e1 DDAG	26	struct RAMBlock {
	27	struct rcu_head rcu;
	28	struct MemoryRegion *mr;
	29	uint8_t *host;
	30	ram_addr_t offset;
	31	ram_addr_t used_length;
	32	ram_addr_t max_length;
	33	void (resized)(const char, uint64_t length, void *host);
	34	uint32_t flags;
	35	/* Protected by iothread lock. */
	36	char idstr[256];
	37	/* RCU-enabled, writes protected by the ramlist lock */
	38	QLIST_ENTRY(RAMBlock) next;
0987d735	39	QLIST_HEAD(, RAMBlockNotifier) ramblock_notifiers;
3c9589e1	40	int fd;
863e9621	41	size_t page_size;
6b6712ef JQ	42	/* dirty bitmap used during migration */
	43	unsigned long *bmap;
	44	/* bitmap of pages that haven't been sent even once
	45	* only maintained and used in postcopy at the moment
	46	* where it's used to send the dirtymap at the start
	47	* of the postcopy phase
	48	*/
	49	unsigned long *unsentmap;
3c9589e1 DDAG	50	};
3c9589e1 DDAG	51
4c4bad48 HZ	52	static inline bool offset_in_ramblock(RAMBlock *b, ram_addr_t offset)
	53	{
	54	return (b && b->host && offset < b->used_length) ? true : false;
	55	}
	56
3c9589e1 DDAG	57	static inline void ramblock_ptr(RAMBlock block, ram_addr_t offset)
3c9589e1 DDAG	58	{
4c4bad48	59	assert(offset_in_ramblock(block, offset));
3c9589e1 DDAG	60	return (char *)block->host + offset;
	61	}
	62
9c607668	63	long qemu_getrampagesize(void);
b8c48993	64	unsigned long last_ram_page(void);
528f46af FZ	65	RAMBlock qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion mr,
	66	bool share, const char *mem_path,
	67	Error **errp);
	68	RAMBlock qemu_ram_alloc_from_ptr(ram_addr_t size, void host,
	69	MemoryRegion mr, Error *errp);
	70	RAMBlock qemu_ram_alloc(ram_addr_t size, MemoryRegion mr, Error **errp);
	71	RAMBlock *qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t max_size,
	72	void (resized)(const char,
	73	uint64_t length,
	74	void *host),
	75	MemoryRegion mr, Error *errp);
f1060c55	76	void qemu_ram_free(RAMBlock *block);
220c3ebd	77
fa53a0e5	78	int qemu_ram_resize(RAMBlock block, ram_addr_t newsize, Error *errp);
62be4e3a	79
58d2707e PB	80	#define DIRTY_CLIENTS_ALL ((1 << DIRTY_MEMORY_NUM) - 1)
	81	#define DIRTY_CLIENTS_NOCODE (DIRTY_CLIENTS_ALL & ~(1 << DIRTY_MEMORY_CODE))
	82
220c3ebd JQ	83	static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
	84	ram_addr_t length,
	85	unsigned client)
	86	{
5b82b703 SH	87	DirtyMemoryBlocks *blocks;
5b82b703 SH	88	unsigned long end, page;
88c73d16	89	unsigned long idx, offset, base;
5b82b703	90	bool dirty = false;
220c3ebd JQ	91
	92	assert(client < DIRTY_MEMORY_NUM);
	93
	94	end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
	95	page = start >> TARGET_PAGE_BITS;
220c3ebd	96
5b82b703 SH	97	rcu_read_lock();
	98
	99	blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);
	100
88c73d16 PB	101	idx = page / DIRTY_MEMORY_BLOCK_SIZE;
	102	offset = page % DIRTY_MEMORY_BLOCK_SIZE;
	103	base = page - offset;
5b82b703	104	while (page < end) {
88c73d16 PB	105	unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);
	106	unsigned long num = next - base;
	107	unsigned long found = find_next_bit(blocks->blocks[idx], num, offset);
	108	if (found < num) {
5b82b703 SH	109	dirty = true;
	110	break;
	111	}
	112
88c73d16 PB	113	page = next;
	114	idx++;
	115	offset = 0;
	116	base += DIRTY_MEMORY_BLOCK_SIZE;
5b82b703 SH	117	}
	118
	119	rcu_read_unlock();
	120
	121	return dirty;
220c3ebd JQ	122	}
220c3ebd JQ	123
72b47e79	124	static inline bool cpu_physical_memory_all_dirty(ram_addr_t start,
f874bf90 PM	125	ram_addr_t length,
	126	unsigned client)
	127	{
5b82b703 SH	128	DirtyMemoryBlocks *blocks;
5b82b703 SH	129	unsigned long end, page;
88c73d16	130	unsigned long idx, offset, base;
5b82b703	131	bool dirty = true;
f874bf90 PM	132
	133	assert(client < DIRTY_MEMORY_NUM);
	134
	135	end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
	136	page = start >> TARGET_PAGE_BITS;
f874bf90	137
5b82b703 SH	138	rcu_read_lock();
	139
	140	blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);
	141
88c73d16 PB	142	idx = page / DIRTY_MEMORY_BLOCK_SIZE;
	143	offset = page % DIRTY_MEMORY_BLOCK_SIZE;
	144	base = page - offset;
5b82b703	145	while (page < end) {
88c73d16 PB	146	unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);
	147	unsigned long num = next - base;
	148	unsigned long found = find_next_zero_bit(blocks->blocks[idx], num, offset);
	149	if (found < num) {
5b82b703 SH	150	dirty = false;
	151	break;
	152	}
	153
88c73d16 PB	154	page = next;
	155	idx++;
	156	offset = 0;
	157	base += DIRTY_MEMORY_BLOCK_SIZE;
5b82b703 SH	158	}
	159
	160	rcu_read_unlock();
	161
	162	return dirty;
f874bf90 PM	163	}
f874bf90 PM	164
220c3ebd JQ	165	static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
	166	unsigned client)
	167	{
	168	return cpu_physical_memory_get_dirty(addr, 1, client);
	169	}
	170
	171	static inline bool cpu_physical_memory_is_clean(ram_addr_t addr)
	172	{
	173	bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA);
	174	bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE);
	175	bool migration =
	176	cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
	177	return !(vga && code && migration);
	178	}
	179
e87f7778 PB	180	static inline uint8_t cpu_physical_memory_range_includes_clean(ram_addr_t start,
	181	ram_addr_t length,
	182	uint8_t mask)
f874bf90	183	{
e87f7778 PB	184	uint8_t ret = 0;
	185
	186	if (mask & (1 << DIRTY_MEMORY_VGA) &&
	187	!cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_VGA)) {
	188	ret \|= (1 << DIRTY_MEMORY_VGA);
	189	}
	190	if (mask & (1 << DIRTY_MEMORY_CODE) &&
	191	!cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_CODE)) {
	192	ret \|= (1 << DIRTY_MEMORY_CODE);
	193	}
	194	if (mask & (1 << DIRTY_MEMORY_MIGRATION) &&
	195	!cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_MIGRATION)) {
	196	ret \|= (1 << DIRTY_MEMORY_MIGRATION);
	197	}
	198	return ret;
f874bf90 PM	199	}
f874bf90 PM	200
220c3ebd JQ	201	static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
	202	unsigned client)
	203	{
5b82b703 SH	204	unsigned long page, idx, offset;
	205	DirtyMemoryBlocks *blocks;
	206
220c3ebd	207	assert(client < DIRTY_MEMORY_NUM);
5b82b703 SH	208
	209	page = addr >> TARGET_PAGE_BITS;
	210	idx = page / DIRTY_MEMORY_BLOCK_SIZE;
	211	offset = page % DIRTY_MEMORY_BLOCK_SIZE;
	212
	213	rcu_read_lock();
	214
	215	blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);
	216
	217	set_bit_atomic(offset, blocks->blocks[idx]);
	218
	219	rcu_read_unlock();
220c3ebd JQ	220	}
	221
	222	static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
58d2707e PB	223	ram_addr_t length,
58d2707e PB	224	uint8_t mask)
220c3ebd	225	{
5b82b703	226	DirtyMemoryBlocks *blocks[DIRTY_MEMORY_NUM];
220c3ebd	227	unsigned long end, page;
88c73d16	228	unsigned long idx, offset, base;
5b82b703	229	int i;
220c3ebd	230
8bafcb21 PB	231	if (!mask && !xen_enabled()) {
	232	return;
	233	}
	234
220c3ebd JQ	235	end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
220c3ebd JQ	236	page = start >> TARGET_PAGE_BITS;
5b82b703 SH	237
	238	rcu_read_lock();
	239
	240	for (i = 0; i < DIRTY_MEMORY_NUM; i++) {
	241	blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i]);
58d2707e	242	}
5b82b703	243
88c73d16 PB	244	idx = page / DIRTY_MEMORY_BLOCK_SIZE;
	245	offset = page % DIRTY_MEMORY_BLOCK_SIZE;
	246	base = page - offset;
5b82b703	247	while (page < end) {
88c73d16	248	unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);
5b82b703 SH	249
	250	if (likely(mask & (1 << DIRTY_MEMORY_MIGRATION))) {
	251	bitmap_set_atomic(blocks[DIRTY_MEMORY_MIGRATION]->blocks[idx],
88c73d16	252	offset, next - page);
5b82b703 SH	253	}
	254	if (unlikely(mask & (1 << DIRTY_MEMORY_VGA))) {
	255	bitmap_set_atomic(blocks[DIRTY_MEMORY_VGA]->blocks[idx],
88c73d16	256	offset, next - page);
5b82b703 SH	257	}
	258	if (unlikely(mask & (1 << DIRTY_MEMORY_CODE))) {
	259	bitmap_set_atomic(blocks[DIRTY_MEMORY_CODE]->blocks[idx],
88c73d16	260	offset, next - page);
5b82b703 SH	261	}
5b82b703 SH	262
88c73d16 PB	263	page = next;
	264	idx++;
	265	offset = 0;
	266	base += DIRTY_MEMORY_BLOCK_SIZE;
58d2707e	267	}
5b82b703 SH	268
	269	rcu_read_unlock();
	270
5100afb5	271	xen_hvm_modified_memory(start, length);
220c3ebd JQ	272	}
220c3ebd JQ	273
fb3ecb7e	274	#if !defined(_WIN32)
5ff7fb77 JQ	275	static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
	276	ram_addr_t start,
	277	ram_addr_t pages)
	278	{
ae2810c4	279	unsigned long i, j;
5ff7fb77 JQ	280	unsigned long page_number, c;
	281	hwaddr addr;
	282	ram_addr_t ram_addr;
ae2810c4	283	unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
5ff7fb77	284	unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
ae2810c4	285	unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
5ff7fb77	286
ae2810c4	287	/* start address is aligned at the start of a word? */
f9ee9f9a AK	288	if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) &&
f9ee9f9a AK	289	(hpratio == 1)) {
5b82b703 SH	290	unsigned long **blocks[DIRTY_MEMORY_NUM];
	291	unsigned long idx;
	292	unsigned long offset;
ae2810c4 JQ	293	long k;
	294	long nr = BITS_TO_LONGS(pages);
	295
5b82b703 SH	296	idx = (start >> TARGET_PAGE_BITS) / DIRTY_MEMORY_BLOCK_SIZE;
	297	offset = BIT_WORD((start >> TARGET_PAGE_BITS) %
	298	DIRTY_MEMORY_BLOCK_SIZE);
	299
	300	rcu_read_lock();
	301
	302	for (i = 0; i < DIRTY_MEMORY_NUM; i++) {
	303	blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i])->blocks;
	304	}
	305
ae2810c4 JQ	306	for (k = 0; k < nr; k++) {
	307	if (bitmap[k]) {
	308	unsigned long temp = leul_to_cpu(bitmap[k]);
	309
5b82b703 SH	310	atomic_or(&blocks[DIRTY_MEMORY_MIGRATION][idx][offset], temp);
5b82b703 SH	311	atomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp);
9460dee4	312	if (tcg_enabled()) {
5b82b703	313	atomic_or(&blocks[DIRTY_MEMORY_CODE][idx][offset], temp);
9460dee4	314	}
ae2810c4	315	}
5b82b703 SH	316
	317	if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) {
	318	offset = 0;
	319	idx++;
	320	}
ae2810c4	321	}
5b82b703 SH	322
	323	rcu_read_unlock();
	324
5100afb5	325	xen_hvm_modified_memory(start, pages << TARGET_PAGE_BITS);
ae2810c4	326	} else {
9460dee4	327	uint8_t clients = tcg_enabled() ? DIRTY_CLIENTS_ALL : DIRTY_CLIENTS_NOCODE;
ae2810c4 JQ	328	/*
	329	* bitmap-traveling is faster than memory-traveling (for addr...)
	330	* especially when most of the memory is not dirty.
	331	*/
	332	for (i = 0; i < len; i++) {
	333	if (bitmap[i] != 0) {
	334	c = leul_to_cpu(bitmap[i]);
	335	do {
7224f66e	336	j = ctzl(c);
ae2810c4 JQ	337	c &= ~(1ul << j);
	338	page_number = (i * HOST_LONG_BITS + j) * hpratio;
	339	addr = page_number * TARGET_PAGE_SIZE;
	340	ram_addr = start + addr;
	341	cpu_physical_memory_set_dirty_range(ram_addr,
9460dee4	342	TARGET_PAGE_SIZE * hpratio, clients);
ae2810c4 JQ	343	} while (c != 0);
ae2810c4 JQ	344	}
5ff7fb77 JQ	345	}
	346	}
	347	}
fb3ecb7e	348	#endif /* not _WIN32 */
5ff7fb77	349
03eebc9e SH	350	bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start,
	351	ram_addr_t length,
	352	unsigned client);
220c3ebd	353
8deaf12c GH	354	DirtyBitmapSnapshot *cpu_physical_memory_snapshot_and_clear_dirty
	355	(ram_addr_t start, ram_addr_t length, unsigned client);
	356
	357	bool cpu_physical_memory_snapshot_get_dirty(DirtyBitmapSnapshot *snap,
	358	ram_addr_t start,
	359	ram_addr_t length);
	360
c8d6f66a MT	361	static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
	362	ram_addr_t length)
	363	{
03eebc9e SH	364	cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_MIGRATION);
	365	cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_VGA);
	366	cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_CODE);
c8d6f66a MT	367	}
	368
	369
20015f72	370	static inline
6b6712ef	371	uint64_t cpu_physical_memory_sync_dirty_bitmap(RAMBlock *rb,
20015f72	372	ram_addr_t start,
1ffb5dfd	373	ram_addr_t length,
68908ed6	374	uint64_t *real_dirty_pages)
20015f72 SH	375	{
	376	ram_addr_t addr;
	377	unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
	378	uint64_t num_dirty = 0;
6b6712ef	379	unsigned long *dest = rb->bmap;
20015f72 SH	380
	381	/* start address is aligned at the start of a word? */
	382	if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) {
	383	int k;
	384	int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS);
5b82b703 SH	385	unsigned long * const *src;
	386	unsigned long idx = (page * BITS_PER_LONG) / DIRTY_MEMORY_BLOCK_SIZE;
	387	unsigned long offset = BIT_WORD((page * BITS_PER_LONG) %
	388	DIRTY_MEMORY_BLOCK_SIZE);
	389
	390	rcu_read_lock();
	391
	392	src = atomic_rcu_read(
	393	&ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION])->blocks;
20015f72 SH	394
20015f72 SH	395	for (k = page; k < page + nr; k++) {
5b82b703 SH	396	if (src[idx][offset]) {
5b82b703 SH	397	unsigned long bits = atomic_xchg(&src[idx][offset], 0);
20015f72	398	unsigned long new_dirty;
1ffb5dfd	399	*real_dirty_pages += ctpopl(bits);
20015f72	400	new_dirty = ~dest[k];
5f2cb946 SH	401	dest[k] \|= bits;
5f2cb946 SH	402	new_dirty &= bits;
20015f72	403	num_dirty += ctpopl(new_dirty);
20015f72	404	}
5b82b703 SH	405
	406	if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) {
	407	offset = 0;
	408	idx++;
	409	}
20015f72	410	}
5b82b703 SH	411
5b82b703 SH	412	rcu_read_unlock();
20015f72 SH	413	} else {
20015f72 SH	414	for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) {
03eebc9e SH	415	if (cpu_physical_memory_test_and_clear_dirty(
	416	start + addr,
	417	TARGET_PAGE_SIZE,
	418	DIRTY_MEMORY_MIGRATION)) {
1ffb5dfd	419	*real_dirty_pages += 1;
20015f72 SH	420	long k = (start + addr) >> TARGET_PAGE_BITS;
	421	if (!test_and_set_bit(k, dest)) {
	422	num_dirty++;
	423	}
20015f72 SH	424	}
	425	}
	426	}
	427
	428	return num_dirty;
	429	}
220c3ebd JQ	430	#endif
220c3ebd JQ	431	#endif