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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B5699CD4848 for ; Thu, 5 Sep 2024 03:46:13 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sm3RF-0007r6-AQ; Wed, 04 Sep 2024 23:45:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sm3RC-0007q3-Qh for qemu-devel@nongnu.org; Wed, 04 Sep 2024 23:45:38 -0400 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sm3RA-0001ah-9n for qemu-devel@nongnu.org; Wed, 04 Sep 2024 23:45:38 -0400 Received: from loongson.cn (unknown [10.20.42.62]) by gateway (Coremail) with SMTP id _____8DxPJtWKdlmCvcqAA--.57423S3; Thu, 05 Sep 2024 11:45:27 +0800 (CST) Received: from [10.20.42.62] (unknown [10.20.42.62]) by front2 (Coremail) with SMTP id qciowMBxjcVTKdlmrHwGAA--.18343S3; Thu, 05 Sep 2024 11:45:25 +0800 (CST) Subject: Re: qemu direct kernel boot on LoongArch To: "Jason A. Donenfeld" Cc: =?UTF-8?Q?Thomas_Wei=c3=9fschuh?= , loongarch@lists.linux.dev, qemu-devel@nongnu.org, xry111@xry111.site References: <1738d60a-df3a-4102-b1da-d16a29b6e06a@t-8ch.de> <49432aed-3ed7-2f07-7f65-311faef96197@loongson.cn> From: maobibo Message-ID: Date: Thu, 5 Sep 2024 11:45:23 +0800 User-Agent: Mozilla/5.0 (X11; Linux loongarch64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-CM-TRANSID: qciowMBxjcVTKdlmrHwGAA--.18343S3 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBj9xXoW7Wr13WF48Zry8KF4xXr13GFX_yoWDGrX_ur na9F1DZ398Ar1UKwn8KFy5Jrnxtr1Yq34kt348Xw4kua48AF4kJ3Z5ur9Fq3saqFyxArZx uw15ArnFvryYgosvyTuYvTs0mTUanT9S1TB71UUUUjUqnTZGkaVYY2UrUUUUj1kv1TuYvT s0mT0YCTnIWjqI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUI cSsGvfJTRUUUbfkYFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I6I8E6xAIw20EY4v20x vaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV WUJVW8JwA2z4x0Y4vEx4A2jsIE14v26F4j6r4UJwA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_ Gr1j6F4UJwAaw2AFwI0_Jrv_JF1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2xF0c Ia020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_JF0_ Jw1lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvEwIxGrw CYjI0SjxkI62AI1cAE67vIY487MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j 6r4UMxCIbckI1I0E14v26r1Y6r17MI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwV AFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUAVWUtwCIc40Y0x0EwIxGrwCI42IY6xIIjxv2 0xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVWUJVW8JwCI42IY6xAIw20EY4 v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AK xVWUJVW8JbIYCTnIWIevJa73UjIFyTuYvjxU7fMaUUUUU Received-SPF: pass client-ip=114.242.206.163; envelope-from=maobibo@loongson.cn; helo=mail.loongson.cn X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, NICE_REPLY_A=-0.993, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Jason, With the latest qemu 9.1 version, elf format booting is supported. Qemu 9.0 does not support it still, here is example command line. ./qemu-system-loongarch64 -m 4G -smp 2 --cpu la464 --machine virt -serial stdio -monitor telnet:localhost:4495,server,nowait -kernel /root/linux_larch/vmlinux -initrd ramdisk -append "root=/dev/ram rdinit=/sbin/init console=ttyS0,115200" --nographic Regards Bibo Mao On 2024/9/5 上午11:12, Jason A. Donenfeld wrote: > On Tue, Oct 10, 2023 at 09:12:46AM +0800, maobibo wrote: >> Thomas, >> >> Thanks for reporting this issue. >> >> It is the problem of QEMU for LoongArch system, QEMU does not support >> booting vmlinux with elf format without UEFI bios now. We will add >> support to boot vmlinux directly on QEMU LoongArch side. > > I ran into this same issue when trying to boot my test kernel for > Ruoyao's recent vDSO getrandom work. Is this something that was ever > addressed on the QEMU side? > > Jason >