linux-kernel - Re: [PATCH 4/5] efi: Export Runtime Configuration Interface table to sysfs

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Message-ID: <20191001180133.GA2279@localhost.localdomain>
Date:   Tue, 1 Oct 2019 18:01:47 +0000
From:   <Narendra.K@...l.com>
To:     <Mario.Limonciello@...l.com>
CC:     <ard.biesheuvel@...aro.org>, <geert@...ux-m68k.org>,
        <Narendra.K@...l.com>, <linux-efi@...r.kernel.org>,
        <mingo@...nel.org>, <tglx@...utronix.de>,
        <linux-kernel@...r.kernel.org>, <james.morse@....com>,
        <tanxiaofei@...wei.com>
Subject: Re: [PATCH 4/5] efi: Export Runtime Configuration Interface table to
 sysfs

On Tue, Oct 01, 2019 at 01:20:46PM +0000, Limonciello, Mario wrote:
[...]
> > > > > > +config EFI_RCI2_TABLE
> > > > > > +       bool "EFI Runtime Configuration Interface Table Version 2 Support"
> > > > > > +       help
> > > > > > +         Displays the content of the Runtime Configuration Interface
> > > > > > +         Table version 2 on Dell EMC PowerEdge systems as a binary
> > > > > > +         attribute 'rci2' under /sys/firmware/efi/tables directory.
> > > > > > +
> > > > > > +         RCI2 table contains BIOS HII in XML format and is used to populate
> > > > > > +         BIOS setup page in Dell EMC OpenManage Server Administrator tool.
> > > > > > +         The BIOS setup page contains BIOS tokens which can be configured.
> > > > > > +
> > > > > > +         Say Y here for Dell EMC PowerEdge systems.
> > > > >
> > > > > A quick Google search tells me these are Intel Xeon.
> > > > > Are arm/arm64/ia64 variants available, too?
> > > > > If not, this should be protected by "depends on x86" ("|| COMPILE_TEST"?).
> > > >
> > > > The code in question is entirely architecture agnostic, and defaults
> > > > to 'n', so I am not convinced this is needed. (It came up in the
> > > > review as well)
> > >
> > > "make oldconfig" still asks me the question on e.g. arm64, where it is
> > > irrelevant, until arm64 variants of the hardware show up.
> > >
> > > So IMHO it should have "depends on X86 || COMPILE_TEST".
> > >
> > 
> > Fair enough. I am going to send out a bunch of EFI fixes this week, so
> > I'll accept a patch that makes the change above.
> 
> Is it really a problem to just say n?
> 
> I think this seems like a needless change that would slow down adoption of
> !x86 if Dell EMC PowerEdge systems did start going that route, especially
> when it comes to distributions that move glacially slow with picking up new
> kernel code.

Hi Ard/Geert,

Any additional thoughts here ?

-- 
With regards,
Narendra K