linux-kernel - Re: [PATCH v2] x86/boot: Use EFI setup data if provided

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Date:   Fri, 29 Mar 2019 09:56:53 +0000
From:   Junichi Nomura <j-nomura@...jp.nec.com>
To:     Chao Fan <fanc.fnst@...fujitsu.com>
CC:     Borislav Petkov <bp@...en8.de>, "bhe@...hat.com" <bhe@...hat.com>,
        "Dave Young" <dyoung@...hat.com>,
        "kasong@...hat.com" <kasong@...hat.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] x86/boot: Use EFI setup data if provided

On 3/29/19 6:44 PM, Chao Fan wrote:
> But in my qemu guest, they are different and the address of ACPI20 is
> higher than ACPI 1.0:
> [root@...alhost ~]# cat /sys/firmware/efi/systab
> ACPI20=0xbfbfa014
> ACPI=0xbfbfa000
> SMBIOS=0xbfbcc000
> 
> In this condition, ACPI 1.0 comes before ACPI 2.0. So I suggested you
> to keep this logical.

Thank you for the information. The proposed patch keeps the logic
and should work fine on that case as well.

-- 
Jun'ichi Nomura, NEC Corporation / NEC Solution Innovators, Ltd.