On Thu, 09 Aug 2012 13:03:57 +0300
Avi Kivity <[email protected]> wrote:
> On 08/07/2012 05:52 PM, Cornelia Huck wrote:
> > Running under a kvm host does not necessarily imply the presence of
> > a page mapped above the main memory with the virtio information;
> > however, the code includes a hard coded access to that page.
> >
> > Instead, check for the presence of the page and exit gracefully
> > before we hit an addressing exception if it does not exist.
> >
> > /*
> > * Init function for virtio
> > * devices are in a single page above top of "normal" mem
> > @@ -443,6 +458,12 @@ static int __init kvm_devices_init(void)
> > }
> >
> > kvm_devices = (void *) real_memory_size;
> > + if (test_devices_support() < 0) {
> > + vmem_remove_mapping(real_memory_size, PAGE_SIZE);
> > + root_device_unregister(kvm_root);
> > + /* No error. */
> > + return 0;
> > + }
> >
>
> Cleaner to defer root_device_register() until after the mapping has been
> verified.
OK, will reorder.
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