Commit be593d62 authored by Xiao Guangrong's avatar Xiao Guangrong Committed by Avi Kivity

KVM: introduce update_memslots function

Introduce update_memslots to update slot which will be update to
kvm->memslots
Signed-off-by: default avatarXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 93a5cef0
......@@ -3546,7 +3546,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
memslot = &slots->memslots[log->slot];
memslot->dirty_bitmap = dirty_bitmap;
memslot->nr_dirty_pages = 0;
slots->generation++;
update_memslots(slots, NULL);
old_slots = kvm->memslots;
rcu_assign_pointer(kvm->memslots, slots);
......
......@@ -320,6 +320,7 @@ void kvm_exit(void);
void kvm_get_kvm(struct kvm *kvm);
void kvm_put_kvm(struct kvm *kvm);
void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
{
......
......@@ -630,6 +630,19 @@ static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot)
}
#endif /* !CONFIG_S390 */
void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new)
{
if (new) {
int id = new->id;
slots->memslots[id] = *new;
if (id >= slots->nmemslots)
slots->nmemslots = id + 1;
}
slots->generation++;
}
/*
* Allocate some memory and give it an address in the guest physical address
* space.
......@@ -780,10 +793,8 @@ int __kvm_set_memory_region(struct kvm *kvm,
GFP_KERNEL);
if (!slots)
goto out_free;
if (mem->slot >= slots->nmemslots)
slots->nmemslots = mem->slot + 1;
slots->generation++;
slots->memslots[mem->slot].flags |= KVM_MEMSLOT_INVALID;
update_memslots(slots, NULL);
old_memslots = kvm->memslots;
rcu_assign_pointer(kvm->memslots, slots);
......@@ -815,9 +826,6 @@ int __kvm_set_memory_region(struct kvm *kvm,
GFP_KERNEL);
if (!slots)
goto out_free;
if (mem->slot >= slots->nmemslots)
slots->nmemslots = mem->slot + 1;
slots->generation++;
/* actual memory is freed via old in kvm_free_physmem_slot below */
if (!npages) {
......@@ -827,7 +835,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
new.lpage_info[i] = NULL;
}
slots->memslots[mem->slot] = new;
update_memslots(slots, &new);
old_memslots = kvm->memslots;
rcu_assign_pointer(kvm->memslots, slots);
synchronize_srcu_expedited(&kvm->srcu);
......
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