linux-kernel - Re: [PATCH 0/3] RISC-V SBI earlycon

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Message-ID: <mvm4l7qvs7g.fsf@suse.de>
Date:   Mon, 25 Mar 2019 17:23:15 +0100
From:   Andreas Schwab <schwab@...e.de>
To:     Anup Patel <anup@...infault.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atish.patra@....com>,
        Christoph Hellwig <hch@...radead.org>,
        Rob Herring <robh@...nel.org>, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH 0/3] RISC-V SBI earlycon

On Dez 04 2018, Anup Patel <anup@...infault.org> wrote:

> This patchset adds RISC-V SBI earlycon and removes RISC-V EARLY_PRINTK.
>
> We should use earlycon over existing EARLY_PRINTK for SBI console because:
> 1. It's a more generic way of implementing early console for debugging
> 2. Current RISC-V EARLY_PRINTK is a compile-time option whereas earlycon
>    is enabled at run-time via kernel parameters.
> 3. To use earlycon with SBI, we have to pass "earlycon=sbi" in kernel
>    parameters. If earlycon kernel parameter is not provided then kernel
>    boots much faster which is very useful in real-world RISC-V deployments.

Why doesn't this earlycon disable itself when the real console kicks in?

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@...e.de
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