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: Uri Lublin <uril@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index a593d092d85bb10daed54f14cc91c83a55859d07..edff4055b32bd75f15230b3b764a31374775f9a7 100644 (file)
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -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);