Re: [PATCH 0/3] Add support for Graviton TRNG

[Saidi, Ali]

On 6/7/19, 7:59 AM, " Ali Saidi" <alisaidi@xxxxxxxxxx> wrote:

    
    
    On 6/5/19, 7:20 AM, "Will Deacon" <will.deacon@xxxxxxx> wrote:
    
        On Tue, Jun 04, 2019 at 08:30:57PM +0000, Ali Saidi wrote:
        > AWS Graviton based systems provide an Arm SMC call in the vendor defined
        > hypervisor region to read random numbers from a HW TRNG and return them to the
        > guest. 
        > 
        > We've observed slower guest boot and especially reboot times due to lack of
        > entropy and providing access to a TRNG is meant to address this. 
        
        Curious, but why this over something like virtio-rng?
        
    This interface allows us to provide the functionality from both EL2 and EL3 and support multiple different types of our instances which we unfortunately can't do with virt-io.
    
Will,

Any additional comments?

Mark,

Do you know when you'll have a chance to rebase arm64/smccc-cleanup?

Thanks,
Ali