[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"

ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
                                    bool share, const char *mem_path,
                                    Error **errp);
ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
                                   MemoryRegion *mr, Error **errp);
ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr, Error **errp);
ram_addr_t 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);
int qemu_get_ram_fd(ram_addr_t addr);
void *qemu_get_ram_block_host_ptr(ram_addr_t addr);
void *qemu_get_ram_ptr(ram_addr_t addr);
void qemu_ram_free(ram_addr_t addr);
void qemu_ram_free_from_ptr(ram_addr_t addr);

int qemu_ram_resize(ram_addr_t base, 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)
{
    unsigned long end, page, next;

    assert(client < DIRTY_MEMORY_NUM);

    end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
    page = start >> TARGET_PAGE_BITS;
    next = find_next_bit(ram_list.dirty_memory[client], end, page);

    return next < end;
}

static inline bool cpu_physical_memory_get_clean(ram_addr_t start,
                                                 ram_addr_t length,
                                                 unsigned client)
{
    unsigned long end, page, next;

    assert(client < DIRTY_MEMORY_NUM);

    end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
    page = start >> TARGET_PAGE_BITS;
    next = find_next_zero_bit(ram_list.dirty_memory[client], end, page);

    return next < end;
}

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 bool cpu_physical_memory_range_includes_clean(ram_addr_t start,
                                                            ram_addr_t length)
{
    bool vga = cpu_physical_memory_get_clean(start, length, DIRTY_MEMORY_VGA);
    bool code = cpu_physical_memory_get_clean(start, length, DIRTY_MEMORY_CODE);
    bool migration =
        cpu_physical_memory_get_clean(start, length, DIRTY_MEMORY_MIGRATION);
    return vga || code || migration;
}

static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
                                                      unsigned client)
{
    assert(client < DIRTY_MEMORY_NUM);
    set_bit(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client]);
}

static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
                                                       ram_addr_t length,
                                                       uint8_t mask)
{
    unsigned long end, page;

    end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
    page = start >> TARGET_PAGE_BITS;
    if (likely(mask & (1 << DIRTY_MEMORY_MIGRATION))) {
        bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page);
    }
    if (unlikely(mask & (1 << DIRTY_MEMORY_VGA))) {
        bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
    }
    if (unlikely(mask & (1 << DIRTY_MEMORY_CODE))) {
        bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_CODE], page, end - page);
    }
    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)) {
        long k;
        long nr = BITS_TO_LONGS(pages);

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

                ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION][page + k] |= temp;
                ram_list.dirty_memory[DIRTY_MEMORY_VGA][page + k] |= temp;
                ram_list.dirty_memory[DIRTY_MEMORY_CODE][page + k] |= temp;
            }
        }
        xen_modified_memory(start, pages << TARGET_PAGE_BITS);
    } else {
        /*
         * 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,
                                       DIRTY_CLIENTS_ALL);
                } while (c != 0);
            }
        }
    }
}
#endif /* not _WIN32 */

static inline void cpu_physical_memory_clear_dirty_range_type(ram_addr_t start,
                                                              ram_addr_t length,
                                                              unsigned client)
{
    unsigned long end, page;

    assert(client < DIRTY_MEMORY_NUM);
    end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
    page = start >> TARGET_PAGE_BITS;
    bitmap_clear(ram_list.dirty_memory[client], page, end - page);
}

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


void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t length,
                                     unsigned client);

#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"
	24
e1c57ab8	25	ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
dbcb8981 PB	26	bool share, const char *mem_path,
dbcb8981 PB	27	Error **errp);
220c3ebd	28	ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
ef701d7b HT	29	MemoryRegion mr, Error *errp);
ef701d7b HT	30	ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion mr, Error *errp);
62be4e3a MT	31	ram_addr_t qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t max_size,
	32	void (resized)(const char,
	33	uint64_t length,
	34	void *host),
	35	MemoryRegion mr, Error *errp);
a35ba7be	36	int qemu_get_ram_fd(ram_addr_t addr);
3fd74b84	37	void *qemu_get_ram_block_host_ptr(ram_addr_t addr);
220c3ebd JQ	38	void *qemu_get_ram_ptr(ram_addr_t addr);
	39	void qemu_ram_free(ram_addr_t addr);
	40	void qemu_ram_free_from_ptr(ram_addr_t addr);
	41
62be4e3a MT	42	int qemu_ram_resize(ram_addr_t base, ram_addr_t newsize, Error **errp);
62be4e3a MT	43
58d2707e PB	44	#define DIRTY_CLIENTS_ALL ((1 << DIRTY_MEMORY_NUM) - 1)
	45	#define DIRTY_CLIENTS_NOCODE (DIRTY_CLIENTS_ALL & ~(1 << DIRTY_MEMORY_CODE))
	46
220c3ebd JQ	47	static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
	48	ram_addr_t length,
	49	unsigned client)
	50	{
	51	unsigned long end, page, next;
	52
	53	assert(client < DIRTY_MEMORY_NUM);
	54
	55	end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
	56	page = start >> TARGET_PAGE_BITS;
	57	next = find_next_bit(ram_list.dirty_memory[client], end, page);
	58
	59	return next < end;
	60	}
	61
f874bf90 PM	62	static inline bool cpu_physical_memory_get_clean(ram_addr_t start,
	63	ram_addr_t length,
	64	unsigned client)
	65	{
	66	unsigned long end, page, next;
	67
	68	assert(client < DIRTY_MEMORY_NUM);
	69
	70	end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
	71	page = start >> TARGET_PAGE_BITS;
	72	next = find_next_zero_bit(ram_list.dirty_memory[client], end, page);
	73
	74	return next < end;
	75	}
	76
220c3ebd JQ	77	static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
	78	unsigned client)
	79	{
	80	return cpu_physical_memory_get_dirty(addr, 1, client);
	81	}
	82
	83	static inline bool cpu_physical_memory_is_clean(ram_addr_t addr)
	84	{
	85	bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA);
	86	bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE);
	87	bool migration =
	88	cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
	89	return !(vga && code && migration);
	90	}
	91
f874bf90 PM	92	static inline bool cpu_physical_memory_range_includes_clean(ram_addr_t start,
	93	ram_addr_t length)
	94	{
	95	bool vga = cpu_physical_memory_get_clean(start, length, DIRTY_MEMORY_VGA);
	96	bool code = cpu_physical_memory_get_clean(start, length, DIRTY_MEMORY_CODE);
	97	bool migration =
	98	cpu_physical_memory_get_clean(start, length, DIRTY_MEMORY_MIGRATION);
	99	return vga \|\| code \|\| migration;
	100	}
	101
220c3ebd JQ	102	static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
	103	unsigned client)
	104	{
	105	assert(client < DIRTY_MEMORY_NUM);
	106	set_bit(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client]);
	107	}
	108
	109	static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
58d2707e PB	110	ram_addr_t length,
58d2707e PB	111	uint8_t mask)
220c3ebd JQ	112	{
	113	unsigned long end, page;
	114
	115	end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
	116	page = start >> TARGET_PAGE_BITS;
58d2707e PB	117	if (likely(mask & (1 << DIRTY_MEMORY_MIGRATION))) {
	118	bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page);
	119	}
	120	if (unlikely(mask & (1 << DIRTY_MEMORY_VGA))) {
	121	bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
	122	}
	123	if (unlikely(mask & (1 << DIRTY_MEMORY_CODE))) {
	124	bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_CODE], page, end - page);
	125	}
220c3ebd JQ	126	xen_modified_memory(start, length);
	127	}
	128
fb3ecb7e	129	#if !defined(_WIN32)
5ff7fb77 JQ	130	static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
	131	ram_addr_t start,
	132	ram_addr_t pages)
	133	{
ae2810c4	134	unsigned long i, j;
5ff7fb77 JQ	135	unsigned long page_number, c;
	136	hwaddr addr;
	137	ram_addr_t ram_addr;
ae2810c4	138	unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
5ff7fb77	139	unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
ae2810c4	140	unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
5ff7fb77	141
ae2810c4	142	/* start address is aligned at the start of a word? */
f9ee9f9a AK	143	if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) &&
f9ee9f9a AK	144	(hpratio == 1)) {
ae2810c4 JQ	145	long k;
	146	long nr = BITS_TO_LONGS(pages);
	147
	148	for (k = 0; k < nr; k++) {
	149	if (bitmap[k]) {
	150	unsigned long temp = leul_to_cpu(bitmap[k]);
	151
	152	ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION][page + k] \|= temp;
	153	ram_list.dirty_memory[DIRTY_MEMORY_VGA][page + k] \|= temp;
	154	ram_list.dirty_memory[DIRTY_MEMORY_CODE][page + k] \|= temp;
	155	}
	156	}
49dfcec4	157	xen_modified_memory(start, pages << TARGET_PAGE_BITS);
ae2810c4 JQ	158	} else {
	159	/*
	160	* bitmap-traveling is faster than memory-traveling (for addr...)
	161	* especially when most of the memory is not dirty.
	162	*/
	163	for (i = 0; i < len; i++) {
	164	if (bitmap[i] != 0) {
	165	c = leul_to_cpu(bitmap[i]);
	166	do {
7224f66e	167	j = ctzl(c);
ae2810c4 JQ	168	c &= ~(1ul << j);
	169	page_number = (i * HOST_LONG_BITS + j) * hpratio;
	170	addr = page_number * TARGET_PAGE_SIZE;
	171	ram_addr = start + addr;
	172	cpu_physical_memory_set_dirty_range(ram_addr,
58d2707e PB	173	TARGET_PAGE_SIZE * hpratio,
58d2707e PB	174	DIRTY_CLIENTS_ALL);
ae2810c4 JQ	175	} while (c != 0);
ae2810c4 JQ	176	}
5ff7fb77 JQ	177	}
	178	}
	179	}
fb3ecb7e	180	#endif /* not _WIN32 */
5ff7fb77	181
c8d6f66a MT	182	static inline void cpu_physical_memory_clear_dirty_range_type(ram_addr_t start,
	183	ram_addr_t length,
	184	unsigned client)
220c3ebd JQ	185	{
	186	unsigned long end, page;
	187
	188	assert(client < DIRTY_MEMORY_NUM);
	189	end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
	190	page = start >> TARGET_PAGE_BITS;
	191	bitmap_clear(ram_list.dirty_memory[client], page, end - page);
	192	}
	193
c8d6f66a MT	194	static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
	195	ram_addr_t length)
	196	{
	197	cpu_physical_memory_clear_dirty_range_type(start, length, DIRTY_MEMORY_MIGRATION);
	198	cpu_physical_memory_clear_dirty_range_type(start, length, DIRTY_MEMORY_VGA);
	199	cpu_physical_memory_clear_dirty_range_type(start, length, DIRTY_MEMORY_CODE);
	200	}
	201
	202
220c3ebd JQ	203	void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t length,
	204	unsigned client);
	205
	206	#endif
	207	#endif