From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754202Ab3KEIjV (ORCPT ); Tue, 5 Nov 2013 03:39:21 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36397 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751455Ab3KEIjR (ORCPT ); Tue, 5 Nov 2013 03:39:17 -0500 Message-Id: <20131105082007.872550445@dhcp-16-126.nay.redhat.com> User-Agent: quilt/0.60-1 Date: Tue, 05 Nov 2013 16:20:07 +0800 From: dyoung@redhat.com To: linux-kernel@vger.kernel.org Cc: linux-efi@vger.kernel.org, x86@kernel.org, mjg59@srcf.ucam.org, hpa@zytor.com, James.Bottomley@HansenPartnership.com, vgoyal@redhat.com, ebiederm@xmission.com, horms@verge.net.au, kexec@lists.infradead.org, bp@alien8.de Subject: [patch 0/7 v2] kexec kernel efi runtime support Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Here is the V2 for supporting kexec kernel efi runtime. Per pervious discussion I pass the 1st kernel efi runtime mapping via setup_data to 2nd kernel. Besides of the runtime mapping info I also pass the fw_vendor, runtime, config table, smbios physical address in setup_data. EFI spec mentioned fw_vendor, runtime, config table addresses will be converted to virt address after entering virtual mode, but we will use it as physical address in efi_init. For smbios EFI spec did not mention about the address updating, but during my test on a HP workstation, the bios will convert it to Virt addr, thus pass it in setup_data as well. For fw_vendor, runtime, config table, I export them in /sys/firmware/ efi/systab, smbios is already in that file. For efi runtime mapping I add a new directory /sys/firmware/efi/ efi-runtime-map/ like below [dave@darkstar ~]$ tree /sys/firmware/efi/efi-runtime-map/ /sys/firmware/efi/efi-runtime-map/ ├── 0 │   ├── attribute │   ├── num_pages │   ├── phys_addr │   ├── type │   └── virt_addr ├── 1 │   ├── attribute │   ├── num_pages │   ├── phys_addr │   ├── type │   └── virt_addr [snip] kexec-tools will assemble them as setup_data and pass to 2nd kernel. I will send userspace patches as well. Limitation is I only write support for x86_64, test on below machines: Lenovo thinkpad t420 Dell inspiron 14 - 3421 HP Z420 workstation Qemu + OVMF Please help to review the patches. The patches are based on matt's efi master tree Changes from v1: add one flag in xloadflags, so kexec-tools can safely load old kernel without efi support. coding style fixes function name for map phys_addr to fixed virt_addr Add ABI documentation for sysfs files -- Thanks Dave