mirror of
https://gitlab.com/qemu-project/qemu
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c6bf8e0e0c
This patch creates a migration bitmap, which is periodically kept in sync with the qemu bitmap. A separate copy of the dirty bitmap for the migration limits the amount of concurrent access to the qemu bitmap from iothread and migration thread (which requires taking the big lock). We use the qemu bitmap type. We have to "undo" the dirty_pages counting optimization on the general dirty bitmap and do the counting optimization with the migration local bitmap. Signed-off-by: Umesh Deshpande <udeshpan@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
129 lines
3.8 KiB
C
129 lines
3.8 KiB
C
/*
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* Declarations for obsolete exec.c 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 EXEC_OBSOLETE_H
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#define EXEC_OBSOLETE_H
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#ifndef WANT_EXEC_OBSOLETE
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#error Do not include exec-obsolete.h
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#endif
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#ifndef CONFIG_USER_ONLY
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#include "hw/xen.h"
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ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
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MemoryRegion *mr);
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ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr);
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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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struct MemoryRegion;
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struct MemoryRegionSection;
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void cpu_register_physical_memory_log(struct MemoryRegionSection *section,
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bool readonly);
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void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
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void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
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int cpu_physical_memory_set_dirty_tracking(int enable);
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#define VGA_DIRTY_FLAG 0x01
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#define CODE_DIRTY_FLAG 0x02
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#define MIGRATION_DIRTY_FLAG 0x08
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static inline int cpu_physical_memory_get_dirty_flags(ram_addr_t addr)
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{
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return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS];
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}
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/* read dirty bit (return 0 or 1) */
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static inline int cpu_physical_memory_is_dirty(ram_addr_t addr)
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{
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return cpu_physical_memory_get_dirty_flags(addr) == 0xff;
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}
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static inline int cpu_physical_memory_get_dirty(ram_addr_t start,
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ram_addr_t length,
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int dirty_flags)
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{
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int ret = 0;
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ram_addr_t addr, end;
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end = TARGET_PAGE_ALIGN(start + length);
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start &= TARGET_PAGE_MASK;
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for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
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ret |= cpu_physical_memory_get_dirty_flags(addr) & dirty_flags;
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}
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return ret;
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}
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static inline int cpu_physical_memory_set_dirty_flags(ram_addr_t addr,
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int dirty_flags)
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{
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return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] |= dirty_flags;
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}
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static inline void cpu_physical_memory_set_dirty(ram_addr_t addr)
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{
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cpu_physical_memory_set_dirty_flags(addr, 0xff);
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}
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static inline int cpu_physical_memory_clear_dirty_flags(ram_addr_t addr,
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int dirty_flags)
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{
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int mask = ~dirty_flags;
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return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] &= mask;
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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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int dirty_flags)
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{
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ram_addr_t addr, end;
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end = TARGET_PAGE_ALIGN(start + length);
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start &= TARGET_PAGE_MASK;
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for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
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cpu_physical_memory_set_dirty_flags(addr, dirty_flags);
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}
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xen_modified_memory(addr, length);
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}
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static inline void cpu_physical_memory_mask_dirty_range(ram_addr_t start,
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ram_addr_t length,
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int dirty_flags)
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{
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ram_addr_t addr, end;
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end = TARGET_PAGE_ALIGN(start + length);
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start &= TARGET_PAGE_MASK;
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for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
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cpu_physical_memory_clear_dirty_flags(addr, dirty_flags);
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}
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}
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void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
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int dirty_flags);
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extern const IORangeOps memory_region_iorange_ops;
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#endif
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#endif
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