Commit 4b4e4867 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin
Browse files

vhost_vdpa: disable doorbell mapping for !MMU 



There could be ways to support doorbell mapping with !MMU, but things
like pgprot_noncached are not universally supported.
Fixable, but just disable this for now.

Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent ddd89d0a

drivers/vhost/vdpa.c

+4 −0
Original line number Diff line number Diff line
@@ -740,6 +740,7 @@ static int vhost_vdpa_release(struct inode *inode, struct file *filep) 
	return 0;

}



#ifdef CONFIG_MMU

static vm_fault_t vhost_vdpa_fault(struct vm_fault *vmf)

{

	struct vhost_vdpa *v = vmf->vma->vm_file->private_data;
@@ -796,6 +797,7 @@ static int vhost_vdpa_mmap(struct file *file, struct vm_area_struct *vma) 
	vma->vm_ops = &vhost_vdpa_vm_ops;

	return 0;

}

#endif /* CONFIG_MMU */



static const struct file_operations vhost_vdpa_fops = {

	.owner		= THIS_MODULE,
@@ -803,7 +805,9 @@ static const struct file_operations vhost_vdpa_fops = { 
	.release	= vhost_vdpa_release,

	.write_iter	= vhost_vdpa_chr_write_iter,

	.unlocked_ioctl	= vhost_vdpa_unlocked_ioctl,

#ifdef CONFIG_MMU

	.mmap		= vhost_vdpa_mmap,

#endif /* CONFIG_MMU */

	.compat_ioctl	= compat_ptr_ioctl,

};