From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Christian Eggers <ceggers@arri.de>
Cc: linux-arm-kernel@lists.infradead.org,
Catalin Marinas <catalin.marinas@arm.com>,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
Nathan Chancellor <nathan@kernel.org>
Subject: Re: CONFIG_THUMB2_KERNEL=y boot failure after Spectre BHB fixes
Date: Wed, 30 Mar 2022 17:11:16 +0100 [thread overview]
Message-ID: <YkSBJD0oA7zxHS+B@shell.armlinux.org.uk> (raw)
In-Reply-To: <2109354.irdbgypaU6@localhost.localdomain>
On Tue, Mar 22, 2022 at 06:49:17PM +0100, Christian Eggers wrote:
> Hi Nathan, hi Russel,
>
> I stumbled today over the same problem (no output on serial console
> with v5.15.28-rt36). During `git bisect`, I had also some commits
> where a few lines of output were visible.
>
> At commit 8d9d651ff227 ("ARM: use LOADADDR() to get load address of
> sections"), the system boots up to here:
>
> start_kernel()
> +--setup_arch()
> +--paging_init()
> +--devicemaps_init()
> +--eary_trap_init(vectors_base = 0xC7FFE000)
> +--copy_from_lma(vectors_base = 0xC7FFE000, __vectors_start=0x0, __vectors_end=0x20)
> +--__memcpy()
>
> copy_template.S:113
> ldr8w r1, r3, r4, r5, r6, r7, r8, ip, lr, abort=20f
> r1 = 0
>
>
> With the final v5.15.28-rt36 I found out that the system boots fine
> after disabling CONFIG_HARDEN_BRANCH_HISTORY.
>
> Is there anything else I could analyze? My SoC system is a NXP i.MX6LL
> with a ARMv7 core. I have access to a JTAG debugger.
I think this is already fixed in mainline. Commit:
6c7cb60bff7a ("ARM: fix Thumb2 regression")
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-03-30 16:12 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-10 19:16 CONFIG_THUMB2_KERNEL=y boot failure after Spectre BHB fixes Nathan Chancellor
2022-03-22 17:49 ` Christian Eggers
2022-03-30 16:11 ` Russell King (Oracle) [this message]
2022-03-30 16:34 ` Ard Biesheuvel
2022-03-30 16:36 ` Russell King (Oracle)
2022-03-30 16:45 ` Ard Biesheuvel
2022-03-30 17:32 ` Christian Eggers
2022-03-30 17:42 ` Ard Biesheuvel
2022-03-30 18:27 ` Christian Eggers
2022-03-30 18:45 ` Russell King (Oracle)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YkSBJD0oA7zxHS+B@shell.armlinux.org.uk \
--to=linux@armlinux.org.uk \
--cc=catalin.marinas@arm.com \
--cc=ceggers@arri.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=llvm@lists.linux.dev \
--cc=nathan@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).