On Mon, Jul 15, 2013 at 7:56 PM, Parag Warudkar <parag.lkml@xxxxxxxxx> wrote:
> On Mon, Jul 15, 2013 at 7:04 PM, Josh Triplett <josh@xxxxxxxxxxxxxxxx> wrote:
>
>> We do need to handle the case of a valid pointer into memory that e820
>> calls system RAM, as well as the case of a valid pointer into memory
>> reserved for the BIOS or similar, but not the case of an invalid
>> pointer.
>
> Would that be as simple as
>
> page_is_ram(
Damn shortcuts -
virt_addr = phys_to_virt(image->base_address);
if(page_is_ram(virt_to_page(virt_addr))) {
//direct read from virt addr
}
Would that suffice for the System RAM case or some other MM trickery
is involved?
Thanks,
Parag
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