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Subject: Re: [PATCH 1/3] x86/boot: Add bit fields into xloadflags for 5-level
 kernel checking
To:     Baoquan He <bhe@redhat.com>, kirill.shutemov@linux.intel.com
Cc:     x86@kernel.org, kexec@lists.infradead.org,
        linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@kernel.org
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From:   "H. Peter Anvin" <hpa@zytor.com>
Message-ID: <44fc1530-eb88-d8c5-7465-e48c91799a98@zytor.com>
Date:   Mon, 3 Sep 2018 23:36:11 -0700
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On 09/03/18 23:06, Baoquan He wrote:
>>
>> That makes no sense.  I'm talking about *entering* the kernel; the second
>> kernel should switch to 5-level mode as necessary.
> 
> OK, I didn't get your point. I forget what difficulty was met so that
> Kirill need to take this way. In that way, we will never have chance to
> put kernel above 64TB even from 5-level kernel to jump to 5-level
> kernel.
> 

It sounds like you have no intent of doing that anyway?  Now, that is
something one could use an xloadflag for, as I previously stated: "this kernel
supports being entered in 5-level mode."

	-hpa