[coreboot] RISC-V HiFive Unleashed board added to coreboot - has PCI-e slots via exp board

Timothy Pearson tpearson at raptorengineering.com
Thu Jun 21 08:14:05 CEST 2018

Hash: SHA256

On 06/20/2018 09:13 PM, Taiidan at gmx.com wrote:
> https://www.phoronix.com/forums/forum/hardware/motherboards-chipsets/1021175-risc-v-sifive-freedom-unleahsed-540-soc-hifive-unleashed-board-added-to-coreboot
> The board costs almost as much as a significantly faster and with much
> more features (IOMMU!) TALOS 2 Lite so I think it is not really worth
> buying right now for someone like me but I am still very curious about it.
> - Unlike the usual crappy SOC products like this there is an available
> sexy expansion board which contains not one but two PCI-e slots and
> various other expansion options including SATA...which all really should
> have came standard. But unfortunately once you buy all the extras that
> make it usable you could have bought a very nice T2 setup so this is
> only for the die-hard hero developers and early adopters. (But I wish I
> had the cash for both!)
> My questions:
> Is it possible to do normal stuff like browse the internet and watch a
> film via video acceleration if you pop in a decent graphics card?
> Are there absolutely no binary blobs? Not even for the NIC? It is
> difficult to find NIC ASIC's that don't have blobs and with RISCV's
> unfortunate lack of an IOMMU this is a very big security issue for
> RISCV. At least with the TALOS 2 there is POWER-IOMMU to isolate it from
> doing anything evil and various people are working on a libre
> replacement which will benefit the entire libre community and anyone
> that likes cheap+good nics.
> Whats the deal with SMM? What a shame they thought to add it.
> I really hope this succeeds and that they eventually add an IOMMU.

Their bootloader is a blob in ROM, for what it's worth.  They also will
not release source for it [1].  I haven't looked further since that
alone is a dealbreaker for an "open" / auditable chip.

[1] https://www.bunniestudios.com/blog/?p=5127

- -- 
Timothy Pearson
Raptor Engineering
+1 (415) 727-8645 (direct line)
+1 (512) 690-0200 (switchboard)
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