From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com ([209.132.183.28]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h8lTB-0003ZA-US for kexec@lists.infradead.org; Tue, 26 Mar 2019 12:46:23 +0000 Date: Tue, 26 Mar 2019 20:46:11 +0800 From: Dave Young Subject: Re: [PATCH v2] x86/boot: Use EFI setup data if provided Message-ID: <20190326124611.GA8143@dhcp-128-65.nay.redhat.com> References: <20190325065921.GA11096@dhcp-128-65.nay.redhat.com> <20190325082720.GA20771@jeru.linux.bs1.fc.nec.co.jp> <51D9A7D1-49BF-4679-B102-0FC5AC300C9F@alien8.de> <20190325101509.GA13160@dhcp-128-65.nay.redhat.com> <701c8e69-e1d4-c653-1d87-1c41789d3d54@ce.jp.nec.com> <20190325120149.GI12016@zn.tnic> <20190325122302.GC13160@dhcp-128-65.nay.redhat.com> <20190325123229.GL12016@zn.tnic> <20190325231000.GA9184@jeru.linux.bs1.fc.nec.co.jp> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190325231000.GA9184@jeru.linux.bs1.fc.nec.co.jp> 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=infradead.org@lists.infradead.org To: Junichi Nomura Cc: "fanc.fnst@cn.fujitsu.com" , "kasong@redhat.com" , "bhe@redhat.com" , "x86@kernel.org" , "kexec@lists.infradead.org" , "linux-kernel@vger.kernel.org" , Borislav Petkov On 03/25/19 at 11:10pm, Junichi Nomura wrote: > On 3/25/19 9:32 PM, Borislav Petkov wrote: > > On Mon, Mar 25, 2019 at 08:23:02PM +0800, Dave Young wrote: > >> Kexec saved the original physical addresses, and pass them to kexeced > >> kernel via x86 setup_data, so both the early parsing or efi init code > >> need to get those physical values from setup_data. > > > > So efi_get_rsdp_addr() needs to be refactored in such a way so that at > > least the loop towards the end gets carved out into a separate function > > - __efi_get_rsdp_addr() or so - which gets config_tables, nr_tables and > > size as arguments and finds the RSDP address in the kexec-ed kernel. > > Since we still need to read systab for nr_tables and do signature > check to determine if it's 32bit or 64bit for kexec-ed kernel, > everything except the address of config_tables are common between > normal boot and kexec boot. Hmm, the efi/kexec support only added for 64bit, so no need check 32bit for kexec. Thanks Dave _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec