Convert KVM from nopage to fault.
Signed-off-by: Nick Piggin <[EMAIL PROTECTED]>
Cc: kvm-devel@lists.sourceforge.net
Cc: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
---
drivers/kvm/kvm_main.c | 38 +++++++++++++-------------------------
1 file changed, 13 insertions(+), 25 deletions(-)
Index: linux-2.6/drivers/kvm/kvm_main.c
===================================================================
--- linux-2.6.orig/drivers/kvm/kvm_main.c
+++ linux-2.6/drivers/kvm/kvm_main.c
@@ -2533,30 +2533,24 @@ static int kvm_vcpu_ioctl_debug_guest(st
return r;
}
-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)
@@ -3111,27 +3105,21 @@ 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;
- page = gfn_to_page(kvm, pgoff);
+ page = gfn_to_page(kvm, vmf->pgoff);
if (!page)
- 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_vm_vm_ops = {
- .nopage = kvm_vm_nopage,
+ .fault = kvm_vm_fault,
};
static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
--
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