Commit ab51a434 authored by Uri Lublin's avatar Uri Lublin Committed by Avi Kivity
Browse files

KVM: Add missing calls to mark_page_dirty() 



A few places where we modify guest memory fail to call mark_page_dirty(),
causing live migration to fail.  This adds the missing calls.

Signed-off-by: default avatarUri Lublin <uril@qumranet.com>
Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent f7e6a45a

drivers/kvm/kvm_main.c

+6 −0
Original line number Diff line number Diff line
@@ -228,12 +228,15 @@ int kvm_write_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size, 
		unsigned now;

		unsigned offset;

		hva_t guest_buf;

		gfn_t gfn;



		paddr = gva_to_hpa(vcpu, addr);



		if (is_error_hpa(paddr))

			break;



		gfn = vcpu->mmu.gva_to_gpa(vcpu, addr) >> PAGE_SHIFT;

		mark_page_dirty(vcpu->kvm, gfn);

		guest_buf = (hva_t)kmap_atomic(

				pfn_to_page(paddr >> PAGE_SHIFT), KM_USER0);

		offset = addr & ~PAGE_MASK;
@@ -953,6 +956,7 @@ static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 
		return 0;

	page = gfn_to_page(m, gpa >> PAGE_SHIFT);

	kvm_mmu_pre_write(vcpu, gpa, bytes);

	mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT);

	virt = kmap_atomic(page, KM_USER0);

	memcpy(virt + offset_in_page(gpa), &val, bytes);

	kunmap_atomic(virt, KM_USER0);
@@ -1294,6 +1298,7 @@ static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa) 
	if (is_error_hpa(para_state_hpa))

		goto err_gp;



	mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT);

	para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT);

	para_state = kmap_atomic(para_state_page, KM_USER0);
@@ -1323,6 +1328,7 @@ static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa) 
	vcpu->para_state_gpa = para_state_gpa;

	vcpu->hypercall_gpa = hypercall_gpa;



	mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT);

	hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT),

				KM_USER1) + (hypercall_hpa & ~PAGE_MASK);

	kvm_arch_ops->patch_hypercall(vcpu, hypercall);