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Re: [Cryptography] Does RISC V solve Spectre ?



Since Spectre and Meltdown are exploiting unintended consequences of 
techniques (branch prediction, L1 & L2 cache in cpu, etc) that where
developed (and even necessary ) for RISC familiy CPU's this seems like
a really weird claim (google RISC vs. CISC ). 

It's possible to have CPU's using a RISC instuction set that are not 
vulnerrable, but those CPU's would run on a really slow clock speed
(so that memmory speed is not a bottleneck anymore) and would use 
massive amounts of cores so that the total speed woud still be ok.

In short:

Instead of having a CPU with 4 cores at 2.0 Ghz each, a system like 
that would have a CPU with 32 cores clocked at 500 Mhz.



>    On 20 Mar 2018, at 11:52, Henry Baker <hbaker1 AT pipeline.com> wrote:
> 
>    Someone has claimed to me that RISC V completely "solves" the Spectre
>    problem.
>    I'm still dubious.  Perhaps it is a derivative/modification of RISC V ?
>    Is there any in-depth analysis of RISC V & Spectre online somewhere?
> 
>    Eben Upton did a blog post on why it doesn't affect the RaspberryPI
> 
>    https://www.raspberrypi.org/blog/why-raspberry-pi-isnt-vulnerable-to
>    -spectre-or-meltdown/
> 
>    f
> 

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