[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 <[email protected]>
 *
 * 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;
};

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);
ram_addr_t last_ram_offset(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_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_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);

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(unsigned long *dest,
                                               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;

    /* 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;
}

void migration_bitmap_extend(ram_addr_t old, ram_addr_t new);
#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 <[email protected]>
	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;
3c9589e1 DDAG	42	};
3c9589e1 DDAG	43
4c4bad48 HZ	44	static inline bool offset_in_ramblock(RAMBlock *b, ram_addr_t offset)
	45	{
	46	return (b && b->host && offset < b->used_length) ? true : false;
	47	}
	48
3c9589e1 DDAG	49	static inline void ramblock_ptr(RAMBlock block, ram_addr_t offset)
3c9589e1 DDAG	50	{
4c4bad48	51	assert(offset_in_ramblock(block, offset));
3c9589e1 DDAG	52	return (char *)block->host + offset;
	53	}
	54
9c607668	55	long qemu_getrampagesize(void);
3c9589e1	56	ram_addr_t last_ram_offset(void);
528f46af FZ	57	RAMBlock qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion mr,
	58	bool share, const char *mem_path,
	59	Error **errp);
	60	RAMBlock qemu_ram_alloc_from_ptr(ram_addr_t size, void host,
	61	MemoryRegion mr, Error *errp);
	62	RAMBlock qemu_ram_alloc(ram_addr_t size, MemoryRegion mr, Error **errp);
	63	RAMBlock *qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t max_size,
	64	void (resized)(const char,
	65	uint64_t length,
	66	void *host),
	67	MemoryRegion mr, Error *errp);
f1060c55	68	void qemu_ram_free(RAMBlock *block);
220c3ebd	69
fa53a0e5	70	int qemu_ram_resize(RAMBlock block, ram_addr_t newsize, Error *errp);
62be4e3a	71
58d2707e PB	72	#define DIRTY_CLIENTS_ALL ((1 << DIRTY_MEMORY_NUM) - 1)
	73	#define DIRTY_CLIENTS_NOCODE (DIRTY_CLIENTS_ALL & ~(1 << DIRTY_MEMORY_CODE))
	74
220c3ebd JQ	75	static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
	76	ram_addr_t length,
	77	unsigned client)
	78	{
5b82b703 SH	79	DirtyMemoryBlocks *blocks;
5b82b703 SH	80	unsigned long end, page;
88c73d16	81	unsigned long idx, offset, base;
5b82b703	82	bool dirty = false;
220c3ebd JQ	83
	84	assert(client < DIRTY_MEMORY_NUM);
	85
	86	end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
	87	page = start >> TARGET_PAGE_BITS;
220c3ebd	88
5b82b703 SH	89	rcu_read_lock();
	90
	91	blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);
	92
88c73d16 PB	93	idx = page / DIRTY_MEMORY_BLOCK_SIZE;
	94	offset = page % DIRTY_MEMORY_BLOCK_SIZE;
	95	base = page - offset;
5b82b703	96	while (page < end) {
88c73d16 PB	97	unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);
	98	unsigned long num = next - base;
	99	unsigned long found = find_next_bit(blocks->blocks[idx], num, offset);
	100	if (found < num) {
5b82b703 SH	101	dirty = true;
	102	break;
	103	}
	104
88c73d16 PB	105	page = next;
	106	idx++;
	107	offset = 0;
	108	base += DIRTY_MEMORY_BLOCK_SIZE;
5b82b703 SH	109	}
	110
	111	rcu_read_unlock();
	112
	113	return dirty;
220c3ebd JQ	114	}
220c3ebd JQ	115
72b47e79	116	static inline bool cpu_physical_memory_all_dirty(ram_addr_t start,
f874bf90 PM	117	ram_addr_t length,
	118	unsigned client)
	119	{
5b82b703 SH	120	DirtyMemoryBlocks *blocks;
5b82b703 SH	121	unsigned long end, page;
88c73d16	122	unsigned long idx, offset, base;
5b82b703	123	bool dirty = true;
f874bf90 PM	124
	125	assert(client < DIRTY_MEMORY_NUM);
	126
	127	end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
	128	page = start >> TARGET_PAGE_BITS;
f874bf90	129
5b82b703 SH	130	rcu_read_lock();
	131
	132	blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);
	133
88c73d16 PB	134	idx = page / DIRTY_MEMORY_BLOCK_SIZE;
	135	offset = page % DIRTY_MEMORY_BLOCK_SIZE;
	136	base = page - offset;
5b82b703	137	while (page < end) {
88c73d16 PB	138	unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);
	139	unsigned long num = next - base;
	140	unsigned long found = find_next_zero_bit(blocks->blocks[idx], num, offset);
	141	if (found < num) {
5b82b703 SH	142	dirty = false;
	143	break;
	144	}
	145
88c73d16 PB	146	page = next;
	147	idx++;
	148	offset = 0;
	149	base += DIRTY_MEMORY_BLOCK_SIZE;
5b82b703 SH	150	}
	151
	152	rcu_read_unlock();
	153
	154	return dirty;
f874bf90 PM	155	}
f874bf90 PM	156
220c3ebd JQ	157	static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
	158	unsigned client)
	159	{
	160	return cpu_physical_memory_get_dirty(addr, 1, client);
	161	}
	162
	163	static inline bool cpu_physical_memory_is_clean(ram_addr_t addr)
	164	{
	165	bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA);
	166	bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE);
	167	bool migration =
	168	cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
	169	return !(vga && code && migration);
	170	}
	171
e87f7778 PB	172	static inline uint8_t cpu_physical_memory_range_includes_clean(ram_addr_t start,
	173	ram_addr_t length,
	174	uint8_t mask)
f874bf90	175	{
e87f7778 PB	176	uint8_t ret = 0;
	177
	178	if (mask & (1 << DIRTY_MEMORY_VGA) &&
	179	!cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_VGA)) {
	180	ret \|= (1 << DIRTY_MEMORY_VGA);
	181	}
	182	if (mask & (1 << DIRTY_MEMORY_CODE) &&
	183	!cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_CODE)) {
	184	ret \|= (1 << DIRTY_MEMORY_CODE);
	185	}
	186	if (mask & (1 << DIRTY_MEMORY_MIGRATION) &&
	187	!cpu_physical_memory_all_dirty(start, length, DIRTY_MEMORY_MIGRATION)) {
	188	ret \|= (1 << DIRTY_MEMORY_MIGRATION);
	189	}
	190	return ret;
f874bf90 PM	191	}
f874bf90 PM	192
220c3ebd JQ	193	static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
	194	unsigned client)
	195	{
5b82b703 SH	196	unsigned long page, idx, offset;
	197	DirtyMemoryBlocks *blocks;
	198
220c3ebd	199	assert(client < DIRTY_MEMORY_NUM);
5b82b703 SH	200
	201	page = addr >> TARGET_PAGE_BITS;
	202	idx = page / DIRTY_MEMORY_BLOCK_SIZE;
	203	offset = page % DIRTY_MEMORY_BLOCK_SIZE;
	204
	205	rcu_read_lock();
	206
	207	blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);
	208
	209	set_bit_atomic(offset, blocks->blocks[idx]);
	210
	211	rcu_read_unlock();
220c3ebd JQ	212	}
	213
	214	static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
58d2707e PB	215	ram_addr_t length,
58d2707e PB	216	uint8_t mask)
220c3ebd	217	{
5b82b703	218	DirtyMemoryBlocks *blocks[DIRTY_MEMORY_NUM];
220c3ebd	219	unsigned long end, page;
88c73d16	220	unsigned long idx, offset, base;
5b82b703	221	int i;
220c3ebd	222
8bafcb21 PB	223	if (!mask && !xen_enabled()) {
	224	return;
	225	}
	226
220c3ebd JQ	227	end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
220c3ebd JQ	228	page = start >> TARGET_PAGE_BITS;
5b82b703 SH	229
	230	rcu_read_lock();
	231
	232	for (i = 0; i < DIRTY_MEMORY_NUM; i++) {
	233	blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i]);
58d2707e	234	}
5b82b703	235
88c73d16 PB	236	idx = page / DIRTY_MEMORY_BLOCK_SIZE;
	237	offset = page % DIRTY_MEMORY_BLOCK_SIZE;
	238	base = page - offset;
5b82b703	239	while (page < end) {
88c73d16	240	unsigned long next = MIN(end, base + DIRTY_MEMORY_BLOCK_SIZE);
5b82b703 SH	241
	242	if (likely(mask & (1 << DIRTY_MEMORY_MIGRATION))) {
	243	bitmap_set_atomic(blocks[DIRTY_MEMORY_MIGRATION]->blocks[idx],
88c73d16	244	offset, next - page);
5b82b703 SH	245	}
	246	if (unlikely(mask & (1 << DIRTY_MEMORY_VGA))) {
	247	bitmap_set_atomic(blocks[DIRTY_MEMORY_VGA]->blocks[idx],
88c73d16	248	offset, next - page);
5b82b703 SH	249	}
	250	if (unlikely(mask & (1 << DIRTY_MEMORY_CODE))) {
	251	bitmap_set_atomic(blocks[DIRTY_MEMORY_CODE]->blocks[idx],
88c73d16	252	offset, next - page);
5b82b703 SH	253	}
5b82b703 SH	254
88c73d16 PB	255	page = next;
	256	idx++;
	257	offset = 0;
	258	base += DIRTY_MEMORY_BLOCK_SIZE;
58d2707e	259	}
5b82b703 SH	260
	261	rcu_read_unlock();
	262
220c3ebd JQ	263	xen_modified_memory(start, length);
	264	}
	265
fb3ecb7e	266	#if !defined(_WIN32)
5ff7fb77 JQ	267	static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
	268	ram_addr_t start,
	269	ram_addr_t pages)
	270	{
ae2810c4	271	unsigned long i, j;
5ff7fb77 JQ	272	unsigned long page_number, c;
	273	hwaddr addr;
	274	ram_addr_t ram_addr;
ae2810c4	275	unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
5ff7fb77	276	unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
ae2810c4	277	unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
5ff7fb77	278
ae2810c4	279	/* start address is aligned at the start of a word? */
f9ee9f9a AK	280	if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) &&
f9ee9f9a AK	281	(hpratio == 1)) {
5b82b703 SH	282	unsigned long **blocks[DIRTY_MEMORY_NUM];
	283	unsigned long idx;
	284	unsigned long offset;
ae2810c4 JQ	285	long k;
	286	long nr = BITS_TO_LONGS(pages);
	287
5b82b703 SH	288	idx = (start >> TARGET_PAGE_BITS) / DIRTY_MEMORY_BLOCK_SIZE;
	289	offset = BIT_WORD((start >> TARGET_PAGE_BITS) %
	290	DIRTY_MEMORY_BLOCK_SIZE);
	291
	292	rcu_read_lock();
	293
	294	for (i = 0; i < DIRTY_MEMORY_NUM; i++) {
	295	blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i])->blocks;
	296	}
	297
ae2810c4 JQ	298	for (k = 0; k < nr; k++) {
	299	if (bitmap[k]) {
	300	unsigned long temp = leul_to_cpu(bitmap[k]);
	301
5b82b703 SH	302	atomic_or(&blocks[DIRTY_MEMORY_MIGRATION][idx][offset], temp);
5b82b703 SH	303	atomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp);
9460dee4	304	if (tcg_enabled()) {
5b82b703	305	atomic_or(&blocks[DIRTY_MEMORY_CODE][idx][offset], temp);
9460dee4	306	}
ae2810c4	307	}
5b82b703 SH	308
	309	if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) {
	310	offset = 0;
	311	idx++;
	312	}
ae2810c4	313	}
5b82b703 SH	314
	315	rcu_read_unlock();
	316
49dfcec4	317	xen_modified_memory(start, pages << TARGET_PAGE_BITS);
ae2810c4	318	} else {
9460dee4	319	uint8_t clients = tcg_enabled() ? DIRTY_CLIENTS_ALL : DIRTY_CLIENTS_NOCODE;
ae2810c4 JQ	320	/*
	321	* bitmap-traveling is faster than memory-traveling (for addr...)
	322	* especially when most of the memory is not dirty.
	323	*/
	324	for (i = 0; i < len; i++) {
	325	if (bitmap[i] != 0) {
	326	c = leul_to_cpu(bitmap[i]);
	327	do {
7224f66e	328	j = ctzl(c);
ae2810c4 JQ	329	c &= ~(1ul << j);
	330	page_number = (i * HOST_LONG_BITS + j) * hpratio;
	331	addr = page_number * TARGET_PAGE_SIZE;
	332	ram_addr = start + addr;
	333	cpu_physical_memory_set_dirty_range(ram_addr,
9460dee4	334	TARGET_PAGE_SIZE * hpratio, clients);
ae2810c4 JQ	335	} while (c != 0);
ae2810c4 JQ	336	}
5ff7fb77 JQ	337	}
	338	}
	339	}
fb3ecb7e	340	#endif /* not _WIN32 */
5ff7fb77	341
03eebc9e SH	342	bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start,
	343	ram_addr_t length,
	344	unsigned client);
220c3ebd	345
c8d6f66a MT	346	static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
	347	ram_addr_t length)
	348	{
03eebc9e SH	349	cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_MIGRATION);
	350	cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_VGA);
	351	cpu_physical_memory_test_and_clear_dirty(start, length, DIRTY_MEMORY_CODE);
c8d6f66a MT	352	}
	353
	354
20015f72 SH	355	static inline
	356	uint64_t cpu_physical_memory_sync_dirty_bitmap(unsigned long *dest,
	357	ram_addr_t start,
1ffb5dfd	358	ram_addr_t length,
68908ed6	359	uint64_t *real_dirty_pages)
20015f72 SH	360	{
	361	ram_addr_t addr;
	362	unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
	363	uint64_t num_dirty = 0;
	364
	365	/* start address is aligned at the start of a word? */
	366	if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) {
	367	int k;
	368	int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS);
5b82b703 SH	369	unsigned long * const *src;
	370	unsigned long idx = (page * BITS_PER_LONG) / DIRTY_MEMORY_BLOCK_SIZE;
	371	unsigned long offset = BIT_WORD((page * BITS_PER_LONG) %
	372	DIRTY_MEMORY_BLOCK_SIZE);
	373
	374	rcu_read_lock();
	375
	376	src = atomic_rcu_read(
	377	&ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION])->blocks;
20015f72 SH	378
20015f72 SH	379	for (k = page; k < page + nr; k++) {
5b82b703 SH	380	if (src[idx][offset]) {
5b82b703 SH	381	unsigned long bits = atomic_xchg(&src[idx][offset], 0);
20015f72	382	unsigned long new_dirty;
1ffb5dfd	383	*real_dirty_pages += ctpopl(bits);
20015f72	384	new_dirty = ~dest[k];
5f2cb946 SH	385	dest[k] \|= bits;
5f2cb946 SH	386	new_dirty &= bits;
20015f72	387	num_dirty += ctpopl(new_dirty);
20015f72	388	}
5b82b703 SH	389
	390	if (++offset >= BITS_TO_LONGS(DIRTY_MEMORY_BLOCK_SIZE)) {
	391	offset = 0;
	392	idx++;
	393	}
20015f72	394	}
5b82b703 SH	395
5b82b703 SH	396	rcu_read_unlock();
20015f72 SH	397	} else {
20015f72 SH	398	for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) {
03eebc9e SH	399	if (cpu_physical_memory_test_and_clear_dirty(
	400	start + addr,
	401	TARGET_PAGE_SIZE,
	402	DIRTY_MEMORY_MIGRATION)) {
1ffb5dfd	403	*real_dirty_pages += 1;
20015f72 SH	404	long k = (start + addr) >> TARGET_PAGE_BITS;
	405	if (!test_and_set_bit(k, dest)) {
	406	num_dirty++;
	407	}
20015f72 SH	408	}
	409	}
	410	}
	411
	412	return num_dirty;
	413	}
	414
88401cbc	415	void migration_bitmap_extend(ram_addr_t old, ram_addr_t new);
220c3ebd JQ	416	#endif
220c3ebd JQ	417	#endif