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9f4bf4baa8
When synchronizing dirty bitmap from kernel KVM we do it in a per-kvmslot fashion and we allocate the userspace bitmap for each of the ioctl. This patch instead make the bitmap cache be persistent then we don't need to g_malloc0() every time. More importantly, the cached per-kvmslot dirty bitmap will be further used when we want to add support for the KVM_CLEAR_DIRTY_LOG and this cached bitmap will be used to guarantee we won't clear any unknown dirty bits otherwise that can be a severe data loss issue for migration code. Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20190603065056.25211-9-peterx@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
43 lines
931 B
C
43 lines
931 B
C
/*
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* Internal definitions for a target's KVM support
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_KVM_INT_H
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#define QEMU_KVM_INT_H
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#include "sysemu/sysemu.h"
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#include "sysemu/accel.h"
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#include "sysemu/kvm.h"
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typedef struct KVMSlot
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{
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hwaddr start_addr;
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ram_addr_t memory_size;
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void *ram;
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int slot;
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int flags;
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int old_flags;
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/* Dirty bitmap cache for the slot */
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unsigned long *dirty_bmap;
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} KVMSlot;
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typedef struct KVMMemoryListener {
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MemoryListener listener;
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KVMSlot *slots;
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int as_id;
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} KVMMemoryListener;
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#define TYPE_KVM_ACCEL ACCEL_CLASS_NAME("kvm")
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#define KVM_STATE(obj) \
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OBJECT_CHECK(KVMState, (obj), TYPE_KVM_ACCEL)
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void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
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AddressSpace *as, int as_id);
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#endif
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