From ff990d5952712c2e163b355946c39278da8407a8 Mon Sep 17 00:00:00 2001 From: Uri Lublin Date: Thu, 22 Feb 2007 17:37:32 +0200 Subject: [PATCH] KVM: Remove write access permissions when dirty-page-logging is enabled 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 Signed-off-by: Avi Kivity --- drivers/kvm/kvm_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index be7694db285d..e48b4d7a350e 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -748,6 +748,8 @@ raced: 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); }