linux-kernel - Re: [PATCH 0/2] Kexec enabling in TDX guest

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Message-ID: <65fc95bb-5ad9-b589-d6a4-762289b3f6bc@intel.com>
Date:   Thu, 16 Feb 2023 09:50:32 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Borislav Petkov <bp@...en8.de>
Cc:     Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Isaku Yamahata <isaku.yamahata@...el.com>, x86@...nel.org,
        linux-coco@...ts.linux.dev, kexec@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] Kexec enabling in TDX guest

On 2/13/23 15:48, Kirill A. Shutemov wrote:
> The patch brings basic enabling of kexec in TDX guests.
> 
> By "basic enabling" I mean, kexec in the guests with a single CPU.
> TDX guests use ACPI MADT MPWK to bring up secondary CPUs. The mechanism
> doesn't allow to put a CPU back offline if it has woken up.
> 
> We are looking into this, but it might take time.

This is simple enough.  But, nobody will _actually_ use this code as-is,
right?  What's the point of applying it now?