linux-kernel - Re: [v5 PATCH] RISC-V: Fix unsupported isa string info.

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Message-ID: <20190910060010.GA6027@infradead.org>
Date:   Mon, 9 Sep 2019 23:00:10 -0700
From:   "hch@...radead.org" <hch@...radead.org>
To:     Atish Patra <Atish.Patra@....com>
Cc:     "hch@...radead.org" <hch@...radead.org>,
        "anup@...infault.org" <anup@...infault.org>,
        "paul.walmsley@...ive.com" <paul.walmsley@...ive.com>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "palmer@...ive.com" <palmer@...ive.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "aou@...s.berkeley.edu" <aou@...s.berkeley.edu>,
        "johan@...nel.org" <johan@...nel.org>
Subject: Re: [v5 PATCH] RISC-V: Fix unsupported isa string info.

On Fri, Sep 06, 2019 at 11:27:57PM +0000, Atish Patra wrote:
> > Agreed. May be something like this ?
> > 
> > Let's say f/d is enabled in kernel but cpu doesn't support it.
> > "unsupported isa" will only appear if there are any unsupported isa.
> > 
> > processor       : 3
> > hart            : 4
> > isa             : rv64imac
> > unsupported isa	: fd
> > mmu             : sv39
> > uarch           : sifive,u54-mc
> > 
> > May be I am just trying over optimize one corner case :) :).
> > /proc/cpuinfo should just print all the isa string. That's it.
> > 
> 
> Ping ?

Yes, I agree with the "dumb" reporting of all capabilities.