208 lines
7.6 KiB
C
208 lines
7.6 KiB
C
/*
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* Declarations for cpu physical memory functions
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*
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* Copyright 2011 Red Hat, Inc. and/or its affiliates
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*
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* Authors:
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* Avi Kivity <avi@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*
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*/
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/*
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* This header is for use by exec.c and memory.c ONLY. Do not include it.
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* The functions declared here will be removed soon.
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*/
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#ifndef RAM_ADDR_H
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#define RAM_ADDR_H
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#ifndef CONFIG_USER_ONLY
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#include "hw/xen/xen.h"
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ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
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bool share, const char *mem_path,
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Error **errp);
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ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
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MemoryRegion *mr, Error **errp);
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ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr, Error **errp);
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ram_addr_t qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t max_size,
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void (*resized)(const char*,
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uint64_t length,
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void *host),
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MemoryRegion *mr, Error **errp);
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int qemu_get_ram_fd(ram_addr_t addr);
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void *qemu_get_ram_block_host_ptr(ram_addr_t addr);
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void *qemu_get_ram_ptr(ram_addr_t addr);
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void qemu_ram_free(ram_addr_t addr);
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void qemu_ram_free_from_ptr(ram_addr_t addr);
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int qemu_ram_resize(ram_addr_t base, ram_addr_t newsize, Error **errp);
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static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
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ram_addr_t length,
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unsigned client)
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{
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unsigned long end, page, next;
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assert(client < DIRTY_MEMORY_NUM);
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end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
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page = start >> TARGET_PAGE_BITS;
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next = find_next_bit(ram_list.dirty_memory[client], end, page);
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return next < end;
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}
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static inline bool cpu_physical_memory_get_clean(ram_addr_t start,
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ram_addr_t length,
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unsigned client)
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{
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unsigned long end, page, next;
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assert(client < DIRTY_MEMORY_NUM);
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end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
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page = start >> TARGET_PAGE_BITS;
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next = find_next_zero_bit(ram_list.dirty_memory[client], end, page);
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return next < end;
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}
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static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
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unsigned client)
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{
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return cpu_physical_memory_get_dirty(addr, 1, client);
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}
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static inline bool cpu_physical_memory_is_clean(ram_addr_t addr)
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{
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bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA);
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bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE);
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bool migration =
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cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
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return !(vga && code && migration);
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}
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static inline bool cpu_physical_memory_range_includes_clean(ram_addr_t start,
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ram_addr_t length)
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{
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bool vga = cpu_physical_memory_get_clean(start, length, DIRTY_MEMORY_VGA);
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bool code = cpu_physical_memory_get_clean(start, length, DIRTY_MEMORY_CODE);
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bool migration =
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cpu_physical_memory_get_clean(start, length, DIRTY_MEMORY_MIGRATION);
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return vga || code || migration;
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}
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static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
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unsigned client)
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{
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assert(client < DIRTY_MEMORY_NUM);
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set_bit(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client]);
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}
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static inline void cpu_physical_memory_set_dirty_range_nocode(ram_addr_t start,
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ram_addr_t length)
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{
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unsigned long end, page;
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end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
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page = start >> TARGET_PAGE_BITS;
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bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page);
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bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
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}
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static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
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ram_addr_t length)
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{
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unsigned long end, page;
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end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
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page = start >> TARGET_PAGE_BITS;
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bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page);
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bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
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bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_CODE], page, end - page);
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xen_modified_memory(start, length);
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}
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#if !defined(_WIN32)
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static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
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ram_addr_t start,
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ram_addr_t pages)
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{
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unsigned long i, j;
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unsigned long page_number, c;
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hwaddr addr;
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ram_addr_t ram_addr;
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unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
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unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
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unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
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/* start address is aligned at the start of a word? */
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if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) &&
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(hpratio == 1)) {
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long k;
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long nr = BITS_TO_LONGS(pages);
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for (k = 0; k < nr; k++) {
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if (bitmap[k]) {
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unsigned long temp = leul_to_cpu(bitmap[k]);
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ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION][page + k] |= temp;
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ram_list.dirty_memory[DIRTY_MEMORY_VGA][page + k] |= temp;
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ram_list.dirty_memory[DIRTY_MEMORY_CODE][page + k] |= temp;
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}
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}
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xen_modified_memory(start, pages);
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} else {
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/*
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* bitmap-traveling is faster than memory-traveling (for addr...)
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* especially when most of the memory is not dirty.
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*/
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for (i = 0; i < len; i++) {
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if (bitmap[i] != 0) {
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c = leul_to_cpu(bitmap[i]);
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do {
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j = ctzl(c);
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c &= ~(1ul << j);
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page_number = (i * HOST_LONG_BITS + j) * hpratio;
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addr = page_number * TARGET_PAGE_SIZE;
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ram_addr = start + addr;
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cpu_physical_memory_set_dirty_range(ram_addr,
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TARGET_PAGE_SIZE * hpratio);
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} while (c != 0);
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}
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}
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}
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}
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#endif /* not _WIN32 */
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static inline void cpu_physical_memory_clear_dirty_range_type(ram_addr_t start,
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ram_addr_t length,
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unsigned client)
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{
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unsigned long end, page;
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assert(client < DIRTY_MEMORY_NUM);
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end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
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page = start >> TARGET_PAGE_BITS;
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bitmap_clear(ram_list.dirty_memory[client], page, end - page);
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}
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static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
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ram_addr_t length)
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{
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cpu_physical_memory_clear_dirty_range_type(start, length, DIRTY_MEMORY_MIGRATION);
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cpu_physical_memory_clear_dirty_range_type(start, length, DIRTY_MEMORY_VGA);
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cpu_physical_memory_clear_dirty_range_type(start, length, DIRTY_MEMORY_CODE);
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}
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void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t length,
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unsigned client);
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#endif
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#endif
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