Re: [PATCH 2/2] arm64: Add support for SMCCC TRNG firmware interface

2020-10-12 Thread Ard Biesheuvel
On Wed, 7 Oct 2020 at 16:44, André Przywara wrote: > > On 07/10/2020 15:16, James Morse wrote: > > Hi, > > > On 06/10/2020 21:18, Andre Przywara wrote: > >> The ARM architected TRNG firmware interface, described in ARM spec > >> DEN0098[1], defines an ARM SMCCC based interface to a true random

Re: [PATCH 2/2] arm64: Add support for SMCCC TRNG firmware interface

2020-10-07 Thread André Przywara
On 07/10/2020 15:16, James Morse wrote: Hi, > On 06/10/2020 21:18, Andre Przywara wrote: >> The ARM architected TRNG firmware interface, described in ARM spec >> DEN0098[1], defines an ARM SMCCC based interface to a true random number >> generator, provided by firmware. >> This can be discovered

Re: [PATCH 2/2] arm64: Add support for SMCCC TRNG firmware interface

2020-10-07 Thread James Morse
Hi Andre, On 06/10/2020 21:18, Andre Przywara wrote: > The ARM architected TRNG firmware interface, described in ARM spec > DEN0098[1], 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

Re: [PATCH 2/2] arm64: Add support for SMCCC TRNG firmware interface

2020-10-07 Thread Mark Brown
On Tue, Oct 06, 2020 at 09:18:08PM +0100, Andre Przywara wrote: > The ARM architected TRNG firmware interface, described in ARM spec > DEN0098[1], defines an ARM SMCCC based interface to a true random number > generator, provided by firmware. > This can be discovered via the SMCCC >=v1.1

[PATCH 2/2] arm64: Add support for SMCCC TRNG firmware interface

2020-10-06 Thread Andre Przywara
The ARM architected TRNG firmware interface, described in ARM spec DEN0098[1], 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