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

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Date:   Fri, 29 Mar 2019 09:37:00 +0000
From:   Junichi Nomura <j-nomura@...jp.nec.com>
To:     Borislav Petkov <bp@...en8.de>, Chao Fan <fanc.fnst@...fujitsu.com>
CC:     "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 6:16 PM, Borislav Petkov wrote:
> On Fri, Mar 29, 2019 at 05:05:50PM +0800, Chao Fan wrote:
>> But in my code, I am not sure which version will be found firstly, so I
>> write this logical, if ACPI20 found, return directly, then consider ACPI 1.0.
> 
> Thanks.
> 
> Junichi, please add a shorter version of that as a comment to the code,
> above the function name so that it is clear why we're preferring the 2.0
> version.

Sure, I'll add this above __efi_get_rsdp_addr().

/*
 * Search EFI system tables for RSDP.  If both ACPI_20_TABLE_GUID and
 * ACPI_TABLE_GUID are found, take the former, which has more features.
 */

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