linux-kernel - Re: [PATCH] riscv: head: use 0 as the default text

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 28 Nov 2022 17:03:46 +0100
From:   Andreas Schwab <schwab@...e.de>
To:     Jisheng Zhang <jszhang@...nel.org>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atishp@...osinc.com>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] riscv: head: use 0 as the default text_offset

On Nov 28 2022, Jisheng Zhang wrote:

> Commit 0f327f2aaad6 ("RISC-V: Add an Image header that boot loader can
> parse.") adds an image header which "is based on ARM64 boot image
> header and provides an opportunity to combine both ARM64 & RISC-V
> image headers in future.". At that time, arm64's default text_offset
> is 0x80000, this is to give "512 KB of guaranteed BSS space to put
> the swapper page tables" as commit cfa7ede20f13 ("arm64: set TEXT_OFFSET
> to 0x0 in preparation for removing it entirely") pointed out, but
> riscv doesn't need the space, so use 0 as the default text_offset.

Doesn't that clash with the memory reserved for openSBI?

-- 
Andreas Schwab, SUSE Labs, schwab@...e.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."