From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com ([209.132.183.28]) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VnJaF-0003HD-Kv for kexec@lists.infradead.org; Mon, 02 Dec 2013 02:50:04 +0000 Date: Mon, 2 Dec 2013 10:49:15 +0800 From: Dave Young Subject: Re: [PATCH v4 07/12] efi: passing kexec necessary efi data via setup_data Message-ID: <20131202024914.GD3999@dhcp-16-126.nay.redhat.com> References: <1385445477-9665-1-git-send-email-dyoung@redhat.com> <1385445477-9665-8-git-send-email-dyoung@redhat.com> <20131127140732.GD32267@pd.tnic> <20131129091415.GH4186@dhcp-16-126.nay.redhat.com> <20131129164632.GD4266@pd.tnic> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20131129164632.GD4266@pd.tnic> 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: Borislav Petkov 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 11/29/13 at 05:46pm, Borislav Petkov wrote: > On Fri, Nov 29, 2013 at 05:14:16PM +0800, Dave Young wrote: > > That's reserved for future extension use, who knows if we will need to > > pass other fields in the future. > > Hrrmmm, 8*64 = 64 Bytes?? And you can't change it later because of the > situation where machines might be using older kexec-tools? Right, compatibility is the reason. > > > > Static function - no need for "efi_" prefix. > > > > Ok. I'm not very satisfied with the function name, any better > > suggestion? > > > > reuse_config > > use_old_config_phys_addr > > update_config_entry_with_phys_addr > > Looks like we're applying quirks so apply_quirks()? Ok, it looks better, will use apply_quirks, thank you. > > And those kexec-specific quirks need to be behind CONFIG_KEXEC too, btw. All these setup_data passing, remapping etc. is mostly for kexec, add a lot of contiditional #if #endif makes the code a mess. I would prefer to not do this if you are not strongly object. > > > Since Matt suggest to extend the function for other possible field > > other than smbios, so I would like to move comment to the front > > of the function like below: > > /* > > * For kexec kernel there's some special config table entries which will be > > * converted to virtual addresses after entering virtual mode. In kexec kernel > > * we need the physical addresses instead, thus passing them via setup_data > > * and update the entries to physical addresses in this function. > > * > > * Currently only handles smbios which is necessary for HP z420. > > */ > > That's better. > > > Is there any idea in your mind how to add the code for HP only? > > DMI? I'm confused how to connect this with DMI.. > > > Yes, __map_region return an error code will be better. Will you send > > a patch for __map_region? or I can add one more patch along with next > > version. > > I was going to wait for your patches to settle down first so that I > don't disturb your work. > > But if you want to fix this, I certainly wouldn't want to stop you :) > but please do so in a prepatch before your series which addresses only > this issue. Ok, so I will leave this to you after this series settle down. Thanks Dave _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec