From mboxrd@z Thu Jan  1 00:00:00 1970
From: Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH v8 0/3] x86/boot/KASLR: Parse ACPI table and limit kaslr
 in immovable memory
Date: Sat, 10 Nov 2018 11:54:22 +0100
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To: Masayoshi Mizuma <msys.mizuma@gmail.com>, "H. Peter Anvin" <hpa@zytor.com>
Cc: Baoquan He <bhe@redhat.com>, Ingo Molnar <mingo@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Chao Fan <fanc.fnst@cn.fujitsu.com>, linux-kernel@vger.kernel.org, x86@kernel.org, linux-efi@vger.kernel.org, linux-acpi@vger.kernel.org, mingo@redhat.com, keescook@chromium.org, rjw@rjwysocki.net, lenb@kernel.org, ard.biesheuvel@linaro.org, indou.takao@jp.fujitsu.com, caoj.fnst@cn.fujitsu.com
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On Thu, Nov 08, 2018 at 11:51:29AM +0100, Borislav Petkov wrote:
> A global definition which doesn't need allocation?
> 
> Maybe hpa would have another, better idea...

...and he has: just put that address in a new field in struct
boot_params by converting one of the padding arrays there.

Don't forget to document it in Documentation/x86/zero-page.txt

This way you don't need any of the allocation fun or to use setup_data
at all.

HTH.

-- 
Regards/Gruss,
    Boris.

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