From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.skyhub.de ([2a01:4f8:120:8448::d00d]) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VrYyb-0007qL-Rz for kexec@lists.infradead.org; Fri, 13 Dec 2013 20:04:48 +0000 Date: Fri, 13 Dec 2013 21:04:12 +0100 From: Borislav Petkov Subject: Re: [PATCH v5 12/14] x86: export x86 boot_params to sysfs Message-ID: <20131213200412.GA12466@pd.tnic> References: <1386582147-9802-1-git-send-email-dyoung@redhat.com> <1386582147-9802-13-git-send-email-dyoung@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1386582147-9802-13-git-send-email-dyoung@redhat.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org To: Dave Young Cc: mjg59@srcf.ucam.org, linux-efi@vger.kernel.org, toshi.kani@hp.com, matt@console-pimps.org, greg@kroah.com, x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, James.Bottomley@HansenPartnership.com, horms@verge.net.au, ebiederm@xmission.com, hpa@zytor.com, vgoyal@redhat.com On Mon, Dec 09, 2013 at 05:42:25PM +0800, Dave Young wrote: > kexec-tools use boot_params for getting the 1st kernel hardware_subarch, > the kexec kernel efi runtime support also need read the old efi_info from > boot_params. Currently it exists in debugfs which is not a good place for > such infomation. Per HPA, we should avoid of "sploit debugfs". > > In this patch /sys/kernel/boot_params are exported, also the setup_data is > exported as a subdirectory. kexec-tools is using debugfs for hardware_subarch > for a long time now so we're not removing it yet. > > Structure is like below: > > /sys/kernel/boot_params > |__ data /* boot_params in binary*/ > |__ setup_data > | |__ 0 /* the first setup_data node */ > | | |__ data /* setup_data node 0 in binary*/ > | | |__ type /* setup_data type of setup_data node 0, hex string */ > [snip] > |__ version /* boot protocal version (in hex, "0x" prefixed)*/ > > Changelog: > Greg: use __ATTR_RO() and group attr. > Matt and Boris: Documentation improvement, code indentation. > > Signed-off-by: Dave Young Acked-by: Borislav Petkov -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec