Re: [tip:x86/kaslr] x86, kaslr: Provide randomness functions

From: Ingo Molnar
Date: Mon Nov 11 2013 - 15:09:56 EST



* H. Peter Anvin <hpa@xxxxxxxxx> wrote:

> On 11/11/2013 11:58 AM, Ingo Molnar wrote:
> >>
> >> Use the i8254 if and only if nothing else is available, it isn't safe to
> >> touch on some newer systems.
> >
> > I concur - the i8254 is probably also a low entry source, given that this
> > all runs early bootup.
> >
>
> Well, it is a 16-bit 1.19318 MHz counter so at least on older systems it
> is likely to provide at least a modicum on entropy. On systems with a
> TSC it is likely to be redundant with the TSC.

Yeah.

Thanks,

Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/