linux-kernel - Re: [PATCH v2 0/3] Add support for SBI v0.2

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Message-ID: <20190927221913.GA4700@infradead.org>
Date:   Fri, 27 Sep 2019 15:19:13 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Atish Patra <atish.patra@....com>
Cc:     linux-kernel@...r.kernel.org, Albert Ou <aou@...s.berkeley.edu>,
        Alan Kao <alankao@...estech.com>,
        Anup Patel <anup@...infault.org>,
        Palmer Dabbelt <palmer@...ive.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Gary Guo <gary@...yguo.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-riscv@...ts.infradead.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Allison Randal <allison@...utok.net>
Subject: Re: [PATCH v2 0/3] Add support for SBI v0.2

On Thu, Sep 26, 2019 at 05:09:12PM -0700, Atish Patra wrote:
> The Supervisor Binary Interface(SBI) specification[1] now defines a
> base extension that provides extendability to add future extensions
> while maintaining backward compatibility with previous versions.
> The new version is defined as 0.2 and older version is marked as 0.1.
> 
> This series adds support v0.2 and a unified calling convention
> implementation between 0.1 and 0.2. It also adds minimal SBI functions
> from 0.2 as well to keep the series lean. 

So before we do this game can be please make sure we have a clean 0.2
environment that never uses the legacy extensions as discussed before?
Without that all this work is rather futile.