linux-kernel - Re: [PATCH v3 1/5] efi: Export boot-services code and data as debugfs-blobs

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Date:   Mon, 23 Apr 2018 13:55:16 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        "Luis R . Rodriguez" <mcgrof@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        Peter Jones <pjones@...hat.com>,
        Dave Olsthoorn <dave@...aar.me>,
        Will Deacon <will.deacon@....com>,
        Andy Lutomirski <luto@...nel.org>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        David Howells <dhowells@...hat.com>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        Josh Triplett <josh@...htriplett.org>,
        dmitry.torokhov@...il.com, mfuzzey@...keon.com,
        keescook@...omium.org, Kalle Valo <kvalo@...eaurora.org>,
        Arend Van Spriel <arend.vanspriel@...adcom.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        nbroeking@...com, bjorn.andersson@...aro.org,
        Torsten Duwe <duwe@...e.de>, x86@...nel.org,
        linux-efi@...r.kernel.org
Subject: Re: [PATCH v3 1/5] efi: Export boot-services code and data as
 debugfs-blobs

On Sun, Apr 08, 2018 at 07:40:10PM +0200, Hans de Goede wrote:
> Sometimes it is useful to be able to dump the efi boot-services code and
> data. This commit adds these as debugfs-blobs to /sys/kernel/debug/efi,
> but only if efi=debug is passed on the kernel-commandline as this requires
> not freeing those memory-regions, which costs 20+ MB of RAM.
> 
> Signed-off-by: Hans de Goede <hdegoede@...hat.com>

For the debugfs interaction:

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>