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Date: Sun, 25 Aug 2013 17:26:19 +0100
From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: "Lee, Chun-Yi" <joeyli.kernel@gmail.com>, linux-kernel@vger.kernel.org,
        linux-security-module@vger.kernel.org, linux-efi@vger.kernel.org,
        linux-pm@vger.kernel.org, linux-crypto@vger.kernel.org,
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        Rusty Russell <rusty@rustcorp.com.au>,
        Herbert Xu <herbert@gondor.hengli.com.au>,
        "David S. Miller" <davem@davemloft.net>,
        "H. Peter Anvin" <hpa@zytor.com>, Michal Marek <mmarek@suse.cz>,
        Gary Lin <GLin@suse.com>, Vivek Goyal <vgoyal@redhat.com>,
        Matthew Garrett <mjg@redhat.com>, "Lee, Chun-Yi" <jlee@suse.com>
Subject: Re: [PATCH 10/18] efi: Enable secure boot lockdown automatically
 when enabled in firmware
Message-ID: <20130825162618.GA20297@srcf.ucam.org>
References: <1377169317-5959-1-git-send-email-jlee@suse.com>
 <1377169317-5959-11-git-send-email-jlee@suse.com>
 <20130825162243.GG5171@amd.pavel.ucw.cz>
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On Sun, Aug 25, 2013 at 06:22:43PM +0200, Pavel Machek wrote:
> On Thu 2013-08-22 19:01:49, Lee, Chun-Yi wrote:
> > From: Matthew Garrett <mjg@redhat.com>
> > 
> > The firmware has a set of flags that indicate whether secure boot is enabled
> > and enforcing. Use them to indicate whether the kernel should lock itself
> > down.  We also indicate the machine is in secure boot mode by adding the
> > EFI_SECURE_BOOT bit for use with efi_enabled.
> 
> > +	status = efi_call_phys5(sys_table->runtime->get_variable,
> > +				L"SecureBoot", &var_guid, NULL, &datasize, &sb);
> 
> What is this L"..." thing?

http://en.wikipedia.org/wiki/C_syntax#Wide_character_strings
-- 
Matthew Garrett | mjg59@srcf.ucam.org
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