[lowrisc-dev] Support for Fedora / compressed extension

Richard W.M. Jones rjones at redhat.com
Sun Apr 1 22:29:05 BST 2018


On Sun, Apr 01, 2018 at 10:57:53PM +0200, Karsten Merker wrote:
> On Sun, Apr 01, 2018 at 09:31:16PM +0100, Richard W.M. Jones wrote:
>  
> > Hi, I was going to try v0.5 on my Nexys 4 DDR.  However I believe
> > that this version doesn't support the Compressed extension.  I
> > disassembled the sample bbl and there are no short instructions.
> > Is support for the C extension available and/or planned?
> 
> Hello,
> 
> AFAIK the lowRISC 0.5 release uses an older version of the rocket
> core without C support and still at priv-1.9.1 (according to the
> table at http://www.lowrisc.org/docs/ethernet-v0.5/).  AIUI, the
> latter means that Fedora wouldn't run even when compiled without
> C instructions as mainline glibc requires at least kernel 4.15
> and kernel 4.15 to the best of my knowledge requires
> priv-1.10-compatible hardware.

Yes that's interesting because it applies to Debian and
indeed any conceivable Linux distro ...

> Somebody mentioned before that there are plans to move lowRISC to
> a priv-1.10-compliant version of rocket but without mentioning an
> estimated timeframe, so I would like to use this opportunity to
> ask on the list what the plans in this regard look like.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top



More information about the lowrisc-dev mailing list