KVM: Convert KVM from ->nopage() to ->fault()

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: kvm-devel@lists.sourceforge.net
Cc: avi@qumranet.com
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 70664f0..1a03b67 100644 (file)
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -662,30 +662,24 @@ void kvm_resched(struct kvm_vcpu *vcpu)
 }
 EXPORT_SYMBOL_GPL(kvm_resched);
 
-static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
-                                   unsigned long address,
-                                   int *type)
+static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
        struct kvm_vcpu *vcpu = vma->vm_file->private_data;
-       unsigned long pgoff;
        struct page *page;
 
-       pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
-       if (pgoff == 0)
+       if (vmf->pgoff == 0)
                page = virt_to_page(vcpu->run);
-       else if (pgoff == KVM_PIO_PAGE_OFFSET)
+       else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET)
                page = virt_to_page(vcpu->pio_data);
        else
-               return NOPAGE_SIGBUS;
+               return VM_FAULT_SIGBUS;
        get_page(page);
-       if (type != NULL)
-               *type = VM_FAULT_MINOR;
-
-       return page;
+       vmf->page = page;
+       return 0;
 }
 
 static struct vm_operations_struct kvm_vcpu_vm_ops = {
-       .nopage = kvm_vcpu_nopage,
+       .fault = kvm_vcpu_fault,
 };
 
 static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
@@ -976,31 +970,25 @@ out:
        return r;
 }
 
-static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
-                                 unsigned long address,
-                                 int *type)
+static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
        struct kvm *kvm = vma->vm_file->private_data;
-       unsigned long pgoff;
        struct page *page;
 
-       pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
-       if (!kvm_is_visible_gfn(kvm, pgoff))
-               return NOPAGE_SIGBUS;
+       if (!kvm_is_visible_gfn(kvm, vmf->pgoff))
+               return VM_FAULT_SIGBUS;
        /* current->mm->mmap_sem is already held so call lockless version */
-       page = __gfn_to_page(kvm, pgoff);
+       page = __gfn_to_page(kvm, vmf->pgoff);
        if (is_error_page(page)) {
                kvm_release_page_clean(page);
-               return NOPAGE_SIGBUS;
+               return VM_FAULT_SIGBUS;
        }
-       if (type != NULL)
-               *type = VM_FAULT_MINOR;
-
-       return page;
+       vmf->page = page;
+       return 0;
 }
 
 static struct vm_operations_struct kvm_vm_vm_ops = {
-       .nopage = kvm_vm_nopage,
+       .fault = kvm_vm_fault,
 };
 
 static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)