linux-kernel - Re: [PATCH -v2] x86/boot/compressed: Register dummy NMI handler in EFI boot loader, to avoid kdump crashes

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Date:   Tue, 10 Jan 2023 15:53:22 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Zeng Heng <zengheng4@...wei.com>
Cc:     Ingo Molnar <mingo@...nel.org>, michael.roth@....com,
        hpa@...or.com, tglx@...utronix.de,
        sathyanarayanan.kuppuswamy@...ux.intel.com,
        kirill.shutemov@...ux.intel.com, jroedel@...e.de,
        keescook@...omium.org, mingo@...hat.com,
        dave.hansen@...ux.intel.com, brijesh.singh@....com,
        linux-kernel@...r.kernel.org, x86@...nel.org, liwei391@...wei.com
Subject: Re: [PATCH -v2] x86/boot/compressed: Register dummy NMI handler in
 EFI boot loader, to avoid kdump crashes

On Tue, Jan 10, 2023 at 08:32:07PM +0800, Zeng Heng wrote:
> And here is the context of mce-inject:
> 
> #0  relocate_kernel () at arch/x86/kernel/relocate_kernel_64.S:55
> #1  0xffffffff81a57fc2 in machine_kexec (image=0xffff888101ef8400)
>     at arch/x86/kernel/machine_kexec_64.c:391

Before we continue with this any further: are you doing this "exercise" in
qemu/kvm and nothing of that is happening on real hardware?

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette