Re: [Xen-devel] [RFC XEN PATCH 00/23] xen: beginning support for RISC-V

From: Bobby Eshleman <bobbyeshleman@gmail.com>
To: Stefano Stabellini <sstabellini@kernel.org>
Cc: Bobby Eshleman <bobbyeshleman@gmail.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Julien Grall <julien@xen.org>, Wei Liu <wl@xen.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	George Dunlap <George.Dunlap@eu.citrix.com>,
	Ian Jackson <ian.jackson@eu.citrix.com>,
	Bobby Eshleman <bobby.eshleman@starlab.io>,
	Dan Robertson <dan@dlrobertson.com>,
	Alistair Francis <alistair.francis@wdc.com>,
	xen-devel@lists.xenproject.org
Subject: Re: [Xen-devel] [RFC XEN PATCH 00/23] xen: beginning support for RISC-V
Date: Wed, 22 Jan 2020 23:13:38 -0600	[thread overview]
Message-ID: <20200123051338.GA6612@bobbye-pc> (raw)
In-Reply-To: <20200123044527.GA5583@bobbye-pc>

On Wed, Jan 22, 2020 at 01:05:11PM -0800, Stefano Stabellini wrote:
> On Wed, 22 Jan 2020, Andrew Cooper wrote:
> > > My big questions are:
> > > 	Does the Xen project have interest in RISC-V?
> > 
> > There is very large downstream interest in RISC-V.  So a definite yes.
> 
> Definite Yes from me too
> 

Both great to hear!

> 
> > > 	What can be done to make the RISC-V port as upstreamable as
> > > 		possible?
> > > 	Any major pitfalls?
> > >
> > > It would be great to hear all of your feedback.
> > 
> > Both RISC-V and Power9 are frequently requested things, and both suffer
> > from the fact that, while we as a community would like them, the
> > upstream intersection of "people who know Xen" and "people who know
> > enough arch $X to do an initial port" is 0.
> > 
> > This series clearly demonstrates a change in the status quo, and I think
> > a lot of people will be happy.
> > 
> > To get RISC-V to being fully supported, we will ultimately need to get
> > hardware into the CI system, and an easy way for developers to test
> > changes.  Do you have any thoughts on production RISC-V hardware
> > (ideally server form factor) for the CI system, and/or dev boards which
> > might be available fairly cheaply?
> 
> My understanding is that virtualization development for RISC-V is done
> on QEMU right now (which could still be hooked into the CI system if
> somebody wanted to do the work I think.)

That is correct.  I think the RTL and hardware folks are waiting for the
spec to be finalized before committing to the effort, so everyone is
just developing against QEMU for now.

I can certainly look at hooking in QEMU to the CI at some point soon.  That
is the OSSTest repo, correct?

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