36adac4934
Introduce KVMMemoryListener.slots_lock to protect the slots inside the kvm memory listener. Currently it is close to useless because all the KVM code path now is always protected by the BQL. But it'll start to make sense in follow up patches where we might do remote dirty bitmap clear and also we'll update the per-slot cached dirty bitmap even without the BQL. So let's prepare for it. We can also use per-slot lock for above reason but it seems to be an overkill. Let's just use this bigger one (which covers all the slots of a single address space) but anyway this lock is still much smaller than the BQL. Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20190603065056.25211-10-peterx@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
45 lines
1006 B
C
45 lines
1006 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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/* Protects the slots and all inside them */
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QemuMutex slots_lock;
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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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