linux-kernel - Re: Hang when booting guest kernels compiled with clang after SRSO mitigations

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Message-ID: <20230810151410.GNZNT+wn/cLBWiU6dO@fat_crate.local>
Date:   Thu, 10 Aug 2023 17:14:10 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: Hang when booting guest kernels compiled with clang after SRSO
 mitigations

On Thu, Aug 10, 2023 at 08:07:06AM -0700, Nathan Chancellor wrote:
>   [    2.408527] microcode: microcode updated early to new patch_level=0x0830107a

Hm, a wild guess: can you boot the *host* with "dis_ucode_ldr" on the
kernel cmdline and see if it still reproduces?

Also, can you bisect rc5..master to see which exact patch is causing
this?

Thx.

-- 
Regards/Gruss,
    Boris.

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