Re: [Xen-devel] why the /dev/mem ioctl ?

["Mark A. Williamson" <mark.williamson@xxxxxxxxxxxx>]

The ioctl was used to set the domain whose memory you want /dev/mem to map, 
for domain builder etc.  I don't know what (if anything) it's used for now...

Mark

On Friday 01 October 2004 21:32, Rik van Riel wrote:
> Hi,
>
> While creating a patch file from the latest Xen, I noticed
> something strange.  There's an ioctl being added to /dev/mem.
>
> I'm wondering what it's used for and why it's using /dev/mem
> instead of (say) /dev/xenctl ...
>
> +static int ioctl_mem(struct inode * inode, struct file * file, unsigned
> int cmd, unsigned long arg)
> +{
> +       switch (cmd) {
> +       case _IO('M', 1): file->private_data = (void *)arg; break;
> +       default: return -ENOSYS;
> +       }
> +       return 0;
> +}
>
> +#if defined(CONFIG_XEN_PRIVILEGED_GUEST)
> +       .ioctl          = ioctl_mem,
> +#endif


-------------------------------------------------------
This SF.net email is sponsored by: IT Product Guide on ITManagersJournal
Use IT products in your business? Tell us what you think of them. Give us
Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more
http://productguide.itmanagersjournal.com/guidepromo.tmpl
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel