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Date:   Mon, 9 Oct 2023 16:35:00 +0300
From:   "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To:     Baoquan He <bhe@redhat.com>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Adrian Hunter <adrian.hunter@intel.com>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@linux.intel.com>,
        Elena Reshetova <elena.reshetova@intel.com>,
        Jun Nakajima <jun.nakajima@intel.com>,
        Rick Edgecombe <rick.p.edgecombe@intel.com>,
        Tom Lendacky <thomas.lendacky@amd.com>,
        kexec@lists.infradead.org, linux-coco@lists.linux.dev,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 10/13] x86/tdx: Convert shared memory back to private on
 kexec
Message-ID: <20231009133500.su4ylwpbnaiyln4d@box.shutemov.name>
References: <20231005131402.14611-1-kirill.shutemov@linux.intel.com>
 <20231005131402.14611-11-kirill.shutemov@linux.intel.com>
 <ZSJpzw2e7KgtJAZy@MiWiFi-R3L-srv>
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On Sun, Oct 08, 2023 at 04:35:27PM +0800, Baoquan He wrote:
> On 10/05/23 at 04:13pm, Kirill A. Shutemov wrote:
> > TDX guests allocate shared buffers to perform I/O. It is done by
> > allocating pages normally from the buddy allocator and converting them
> > to shared with set_memory_decrypted().
> > 
> > The target kernel has no idea what memory is converted this way. It only
>       ~~~~~~~~~~~~~
> > sees E820_TYPE_RAM.
> 
> I finally realized it means the 2nd kernel of kexec rebooting. Maybe we
> can call it 2nd kernel always, it works for both kexec and kdump
> jumping. 

Okay. Will fix. I am new to kexec and I don't know proper terminology :)

-- 
  Kiryl Shutsemau / Kirill A. Shutemov