Re: [PATCH v3 4/5] arm64: Add support for SMCCC TRNG entropy source

2020-11-20 Thread Ard Biesheuvel
On Fri, 20 Nov 2020 at 11:52, André Przywara wrote: > > On 19/11/2020 13:41, Ard Biesheuvel wrote: > > Hi, > > > On Fri, 13 Nov 2020 at 19:24, Andre Przywara wrote: > >> > >> The ARM architected TRNG firmware interface, described in ARM spec > >> DEN0098, defines an ARM SMCCC based interface to a

Re: [PATCH v3 4/5] arm64: Add support for SMCCC TRNG entropy source

2020-11-20 Thread André Przywara
On 19/11/2020 13:41, Ard Biesheuvel wrote: Hi, > On Fri, 13 Nov 2020 at 19:24, Andre Przywara wrote: >> >> 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 b

Re: [PATCH v3 4/5] arm64: Add support for SMCCC TRNG entropy source

2020-11-19 Thread Ard Biesheuvel
On Fri, 13 Nov 2020 at 19:24, Andre Przywara wrote: > > 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 provide

[PATCH v3 4/5] arm64: Add support for SMCCC TRNG entropy source

2020-11-13 Thread Andre Przywara
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