From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C28B6C4360F for ; Tue, 2 Apr 2019 08:42:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8A41D20830 for ; Tue, 2 Apr 2019 08:42:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729563AbfDBImw (ORCPT ); Tue, 2 Apr 2019 04:42:52 -0400 Received: from mail.cn.fujitsu.com ([183.91.158.132]:29752 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729477AbfDBImv (ORCPT ); Tue, 2 Apr 2019 04:42:51 -0400 X-IronPort-AV: E=Sophos;i="5.60,298,1549900800"; d="scan'208";a="58286779" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 02 Apr 2019 16:42:48 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id 2A0DE4CD7BB0; Tue, 2 Apr 2019 16:42:49 +0800 (CST) Received: from localhost.localdomain (10.167.225.56) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.439.0; Tue, 2 Apr 2019 16:42:52 +0800 Date: Tue, 2 Apr 2019 17:41:49 +0800 From: Chao Fan To: Junichi Nomura CC: Borislav Petkov , "bhe@redhat.com" , Dave Young , "kasong@redhat.com" , "x86@kernel.org" , "kexec@lists.infradead.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH v2] x86/boot: Use efi_setup_data for searching RSDP on kexec-ed kernel Message-ID: <20190402094149.GB1555@localhost.localdomain> References: <20190325122302.GC13160@dhcp-128-65.nay.redhat.com> <20190325123229.GL12016@zn.tnic> <20190325231000.GA9184@jeru.linux.bs1.fc.nec.co.jp> <20190326135714.GG1867@zn.tnic> <20190327014852.GA3659@MiWiFi-R3L-srv> <73322ba9-e436-68db-7863-afd31607d969@ce.jp.nec.com> <20190328064343.GA1877@MiWiFi-R3L-srv> <20190328074337.GA9470@jeru.linux.bs1.fc.nec.co.jp> <20190328155256.GP22720@zn.tnic> <20190401000837.GA5170@jeru.linux.bs1.fc.nec.co.jp> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20190401000837.GA5170@jeru.linux.bs1.fc.nec.co.jp> User-Agent: Mutt/1.11.3 (2019-02-01) X-Originating-IP: [10.167.225.56] X-yoursite-MailScanner-ID: 2A0DE4CD7BB0.AE4B9 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: fanc.fnst@cn.fujitsu.com Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I have test your PATCH in Qemu guest: ---------- Fedora 29 (Workstation Edition) Kernel 5.1.0-rc3+ on an x86_64 (ttyS0) localhost login: root Password: Last login: Tue Apr 2 05:30:33 on ttyS0 [root@localhost ~]# cd /boot [root@localhost boot]# ls config-4.18.16-300.fc29.x86_64 efi extlinux grub2 initramfs-0-rescue-858ff1f5d0cb453898ae6c7f77c68ba7.img initramfs-4.18.16-300.fc29.x86_64.img initramfs-4.18.16-300.fc29.x86_64kdump.img initramfs-5.1.0-rc3+.img initramfs-5.1.0-rc3+kdump.img loader lost+found System.map System.map-4.18.16-300.fc29.x86_64 System.map-5.1.0-rc3+ vmlinuz vmlinuz-0-rescue-858ff1f5d0cb453898ae6c7f77c68ba7 vmlinuz-4.18.16-300.fc29.x86_64 vmlinuz-5.1.0-rc3+ [root@localhost boot]# kexec -l vmlinuz-5.1.0-rc3+ --initrd=initramfs-5.1.0-rc3+.img --reuse-cmdline [root@localhost boot]# kexec -e [ 77.933760] Unregister pv shared memory for cpu 1 [ 77.933763] Unregister pv shared memory for cpu 2 [ 77.933766] Unregister pv shared memory for cpu 5 [ 77.933825] Unregister pv shared memory for cpu 7 [ 77.933882] Unregister pv shared memory for cpu 3 [ 77.933904] Unregister pv shared memory for cpu 8 [ 77.936147] Unregister pv shared memory for cpu 4 [ 77.936199] Unregister pv shared memory for cpu 9 [ 77.945822] Unregister pv shared memory for cpu 0 [ 77.946308] Unregister pv shared memory for cpu 6 [ 77.947420] sd 0:0:0:0: [sda] Synchronizing SCSI cache [ 77.989030] kexec_core: Starting new kernel early console in extract_kernel input_data: 0x000000017f6033b1 input_len: 0x00000000008412d4 output: 0x000000017e000000 output_len: 0x0000000001e15844 kernel_total_size: 0x0000000001e2c000 trampoline_32bit: 0x000000000009d000 booted via startup_64() Physical KASLR disabled: no suitable memory region! ------ I am not sure whether I have done the right test. This guest is booted from EFI. Here we can see the kexeced kernel has completed the compressed boot stage. So I think your PATCH works. Thanks, Chao Fan