Re: [edk2-devel] RFC: Adding support for ARM (RNDR etc.) to RngDxe

Rebecca Cran <rebecca@...>

On 1/15/21 7:51 PM, Sami Mujawar wrote:

I have shared some initial thoughts on the RNG implementation updates at
Kindly let me know your feedback or if you have any queries.
The ARMv8.5 RNDRRS instruction appears to be missing from the diagram on page 11 - it has RngLib|RNDR, which is listed under PRNG, but RNDRRS returns a true random number. From the Arm ARM:

"Returns a 64-bit random number which is reseeded from the True
Random Number source immediately before the read of the random number."

Rebecca Cran

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