On 05/11/2020 14:38, Mark Rutland wrote:
Hi,
> On Thu, Nov 05, 2020 at 02:29:49PM +, Mark Brown wrote:
>> On Thu, Nov 05, 2020 at 02:03:22PM +, Mark Rutland wrote:
>>> On Thu, Nov 05, 2020 at 01:41:42PM +, Mark Brown wrote:
>>
It isn't obvious to me why we don't fall through to
On 2020-11-05 14:34, Ard Biesheuvel wrote:
On Thu, 5 Nov 2020 at 15:30, Mark Rutland wrote:
On Thu, Nov 05, 2020 at 03:04:57PM +0100, Ard Biesheuvel wrote:
> On Thu, 5 Nov 2020 at 15:03, Mark Rutland wrote:
> > On Thu, Nov 05, 2020 at 01:41:42PM +, Mark Brown wrote:
> > > On Thu, Nov 05,
On Thu, Nov 05, 2020 at 03:34:01PM +0100, Ard Biesheuvel wrote:
> On Thu, 5 Nov 2020 at 15:30, Mark Rutland wrote:
> > On Thu, Nov 05, 2020 at 03:04:57PM +0100, Ard Biesheuvel wrote:
> > > On Thu, 5 Nov 2020 at 15:03, Mark Rutland wrote:
> >
> > > > That said, I'm not sure it's great to plumb
On Thu, Nov 05, 2020 at 02:29:49PM +, Mark Brown wrote:
> On Thu, Nov 05, 2020 at 02:03:22PM +, Mark Rutland wrote:
> > On Thu, Nov 05, 2020 at 01:41:42PM +, Mark Brown wrote:
>
> > > It isn't obvious to me why we don't fall through to trying the SMCCC
> > > TRNG here if for some
On Thu, 5 Nov 2020 at 15:30, Mark Rutland wrote:
>
> On Thu, Nov 05, 2020 at 03:04:57PM +0100, Ard Biesheuvel wrote:
> > On Thu, 5 Nov 2020 at 15:03, Mark Rutland wrote:
> > > On Thu, Nov 05, 2020 at 01:41:42PM +, Mark Brown wrote:
> > > > On Thu, Nov 05, 2020 at 12:56:55PM +, Andre
On 05/11/2020 14:03, Mark Rutland wrote:
> On Thu, Nov 05, 2020 at 01:41:42PM +, Mark Brown wrote:
>> On Thu, Nov 05, 2020 at 12:56:55PM +, Andre Przywara wrote:
>>
>>> static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
>>> {
>>> + struct arm_smccc_res res;
>>>
On Thu, Nov 05, 2020 at 03:04:57PM +0100, Ard Biesheuvel wrote:
> On Thu, 5 Nov 2020 at 15:03, Mark Rutland wrote:
> > On Thu, Nov 05, 2020 at 01:41:42PM +, Mark Brown wrote:
> > > On Thu, Nov 05, 2020 at 12:56:55PM +, Andre Przywara wrote:
> > That said, I'm not sure it's great to plumb
On Thu, Nov 05, 2020 at 02:03:22PM +, Mark Rutland wrote:
> On Thu, Nov 05, 2020 at 01:41:42PM +, Mark Brown wrote:
> > It isn't obvious to me why we don't fall through to trying the SMCCC
> > TRNG here if for some reason the v8.5-RNG didn't give us something.
> > Definitely an obscure
On Thu, 5 Nov 2020 at 15:03, Mark Rutland wrote:
>
> On Thu, Nov 05, 2020 at 01:41:42PM +, Mark Brown wrote:
> > On Thu, Nov 05, 2020 at 12:56:55PM +, Andre Przywara wrote:
> >
> > > static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
> > > {
> > > + struct
On Thu, Nov 05, 2020 at 01:41:42PM +, Mark Brown wrote:
> On Thu, Nov 05, 2020 at 12:56:55PM +, Andre Przywara wrote:
>
> > static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
> > {
> > + struct arm_smccc_res res;
> > unsigned long val;
> > - bool ok =
On Thu, Nov 05, 2020 at 12:56:55PM +, Andre Przywara wrote:
> static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
> {
> + struct arm_smccc_res res;
> unsigned long val;
> - bool ok = arch_get_random_seed_long();
>
> - *v = val;
> - return ok;
>
The ARM architected TRNG firmware interface, described in ARM spec
DEN0098, defines an ARM SMCCC based interface to a true random number
generator, provided by firmware.
This can be discovered via the SMCCC >=v1.1 interface, and provides
up to 192 bits of entropy per call.
Hook this SMC call into
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