How to reserve physical address space region

[Umair Khan]

I've tried to port ldd3 for the latest kernel source.
Here's the link of my repository if anyone needs it -
https://github.com/omerjerk/ldd3_scull

On Mon, Oct 19, 2015 at 4:34 PM, Mulyadi Santosa <mulyadi.santosa at gmail.com>
wrote:

> On Fri, Oct 16, 2015 at 10:53 AM, sahlot arvind <asahlot at gmail.com> wrote:
> > Hi,
> >
> > Is there an API kernel exposes to use for a driver in order to reserve
> > physical address space?
> > I mean I want to reserve 5GB (or more if allowed) of contiguous physical
> > address space anywhere in the address range (wherever it is available..
> > doesn't matter) and then I want to map that physical address range in the
> > kernel to get a virtual address so that my driver can dereference that
> > virtual pointer to access the mapped physical address range.
> >
> > Thanks in advance!
> > Sahlot
> >
>
> 5 GB is alot. If you are sure about it, then I guess boot_memalloc()
> might be the only choice
>
>
> --
> regards,
>
> Mulyadi Santosa
> Freelance Linux trainer and consultant
>
> blog: the-hydra.blogspot.com
> training: mulyaditraining.blogspot.com
>
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