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KVM: Remove write access permissions when dirty-page-logging is enabled

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Enabling dirty page logging is done using KVM_SET_MEMORY_REGION ioctl.
If the memory region already exists, we need to remove write accesses,
so writes will be caught, and dirty pages will be logged.

Signed-off-by: Uri Lublin <uril@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Uri Lublin 2007-02-22 17:37:32 +02:00 committed by Avi Kivity
parent 02b27c1f80
commit ff990d5952
1 changed files with 2 additions and 0 deletions
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2
drivers/kvm/kvm_main.c
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@ -748,6 +748,8 @@ static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
vcpu = vcpu_load_slot(kvm, i);
if (!vcpu)
continue;
if (new.flags & KVM_MEM_LOG_DIRTY_PAGES)
do_remove_write_access(vcpu, mem->slot);
kvm_mmu_reset_context(vcpu);
vcpu_put(vcpu);
}