From: Christoph Hellwig <hch@infradead.org>
To: Atish Patra <atish.patra@wdc.com>
Cc: Andreas Schwab <schwab@suse.de>,
"linux-riscv@lists.infradead.org"
<linux-riscv@lists.infradead.org>,
Anup Patel <Anup.Patel@wdc.com>
Subject: Re: kernel after 5.0-rc2 may not boot using BBL
Date: Fri, 8 Feb 2019 00:32:06 -0800 [thread overview]
Message-ID: <20190208083206.GA4699@infradead.org> (raw)
In-Reply-To: <4b647c0d-86de-fed3-aca6-d248b9aff762@wdc.com>
On Thu, Feb 07, 2019 at 10:08:14PM -0800, Atish Patra wrote:
> If you are building a larger kernel image, it may not boot using BBL after
> 5.0-rc2. It works fine with OpenSBI though.
>
> Here is the reasoning in case anybody else is facing the same issue.
>
> The following patch was added 5.0-rc2 which helps reduce the flat image size
> for Linux kernel.
>
> "22e6a2e1 RISC-V: Make BSS section as the last section in vmlinux.lds.S"
>
> As the BSS section is moved to the end of the ELF, flat image will not
> include it. As BBL copies the DTB at the next 2MB page boundary, BSS
> section may overlap with DTB address. Kernel clears BSS section during early
> boot which may clear the DTB as well leading to a boot failure.
Breaking everyones (qemu) setups that we only got working two release
ago is really annoying. I'd suggest reverting the commit for now, or
at least making it an optional config option.
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next prev parent reply other threads:[~2019-02-08 8:32 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-08 6:08 kernel after 5.0-rc2 may not boot using BBL Atish Patra
2019-02-08 8:32 ` Christoph Hellwig [this message]
2019-02-08 9:02 ` Anup Patel
2019-02-08 9:13 ` Christoph Hellwig
2019-02-08 9:17 ` Anup Patel
2019-02-08 17:28 ` Palmer Dabbelt
2019-02-09 3:30 ` Anup Patel
2019-02-11 8:25 ` Christoph Hellwig
2019-02-11 8:45 ` Anup Patel
2019-02-12 1:24 ` Michael Clark
2019-02-13 21:00 ` Palmer Dabbelt
2019-02-11 19:54 ` Palmer Dabbelt
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