Il 05/11/2013 15:04, Gleb Natapov ha scritto:
> It was used in conjunction with KVM_SET_MEMORY_REGION ioctl which was
> removed by b74a07beed0 in 2010, QEMU stopped using it in 2008, so
> it is time to remove the code finally.
>
> Signed-off-by: Gleb Natapov <[email protected]>
I think it is usable (perhaps not useful...) on its own, though. It is
just 40 lines of self-contained code, keeping it doesn't do any harm.
Paolo
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 82c4047..a42f019 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -2524,44 +2524,12 @@ out:
> }
> #endif
>
> -static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
> -{
> - struct page *page[1];
> - unsigned long addr;
> - int npages;
> - gfn_t gfn = vmf->pgoff;
> - struct kvm *kvm = vma->vm_file->private_data;
> -
> - addr = gfn_to_hva(kvm, gfn);
> - if (kvm_is_error_hva(addr))
> - return VM_FAULT_SIGBUS;
> -
> - npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page,
> - NULL);
> - if (unlikely(npages != 1))
> - return VM_FAULT_SIGBUS;
> -
> - vmf->page = page[0];
> - return 0;
> -}
> -
> -static const struct vm_operations_struct kvm_vm_vm_ops = {
> - .fault = kvm_vm_fault,
> -};
> -
> -static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
> -{
> - vma->vm_ops = &kvm_vm_vm_ops;
> - return 0;
> -}
> -
> static struct file_operations kvm_vm_fops = {
> .release = kvm_vm_release,
> .unlocked_ioctl = kvm_vm_ioctl,
> #ifdef CONFIG_COMPAT
> .compat_ioctl = kvm_vm_compat_ioctl,
> #endif
> - .mmap = kvm_vm_mmap,
> .llseek = noop_llseek,
> };
>
> --
> Gleb.
>
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