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

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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>
This commit is contained in:
npiggin@suse.de 2007-12-05 18:15:52 +11:00 committed by Avi Kivity
parent 53e0aa7b65
commit e4a533a416
1 changed files with 15 additions and 27 deletions
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42
drivers/kvm/kvm_main.c
View file

@ -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)