From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 178EB19B595 for ; Thu, 5 Sep 2024 14:54:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725548086; cv=none; b=qgVUesPXgWEQWkeISx5yeAAv3Won7XzdLnGO8sXfTDHQKu4uJ1eEnyh88iiRVso10DriysSO8EV2JKwnc/h4KDKU8LjMDZNS/mLt+OLFKgR6GGFJTCXxnptpQ5lsw4YgQH2fxvv2IOHXC3nmy8tDTBPA/lAnpmTfGhZZW2OCj40= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725548086; c=relaxed/simple; bh=2QHNji9446+jZlLN0H0XuIzBV9/+dZ4zLedoCAxyAhE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=sb1InZM1PlfV/Sl+p0AfhUVFoB4abaxkc3hI1UDMjpR3C1OUl/fQ+srVVQRBOsmzPv8pjpVkVn5rfe1z0nZXVo4U4oy/tjZxFdbb4lYSxWED688jngOc6vn8lLg3truUsB0wpTiyIsrT6HYN9tofKWqN5D38SeaX6ywCg8UMpds= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b=iOJ3Bxe5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="iOJ3Bxe5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DD056C4CEC3; Thu, 5 Sep 2024 14:54:44 +0000 (UTC) Authentication-Results: smtp.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="iOJ3Bxe5" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1725548083; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UbUvqUbTxXvSxmvdmKVvl8aODTaMQ8d9lp3BwWcHvCM=; b=iOJ3Bxe5eqok/NAXaNksuFqJ2cDdyc2uK/NuptUzWov9mi2BA9FYwvQzQJgm2IRE8TJ3X/ Bz5gEZVAOBA5Uft4TNmMNWxipkGl8HexQCCZPIH1cGH/kmlQFGP37IG8Pq8zpYBEZKXRc2 XuvF8wzz/IkMBIshSsXD//YubK4R9oU= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id 61832bb4 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Thu, 5 Sep 2024 14:54:43 +0000 (UTC) Date: Thu, 5 Sep 2024 16:54:41 +0200 From: "Jason A. Donenfeld" To: maobibo Cc: Thomas =?utf-8?Q?Wei=C3=9Fschuh?= , loongarch@lists.linux.dev, qemu-devel@nongnu.org, xry111@xry111.site Subject: Re: qemu direct kernel boot on LoongArch Message-ID: References: <1738d60a-df3a-4102-b1da-d16a29b6e06a@t-8ch.de> <49432aed-3ed7-2f07-7f65-311faef96197@loongson.cn> <95da2e9e-0905-ad61-6bf9-c2636f2cc5f1@loongson.cn> Precedence: bulk X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <95da2e9e-0905-ad61-6bf9-c2636f2cc5f1@loongson.cn> On Thu, Sep 05, 2024 at 02:11:32PM +0800, maobibo wrote: > > > On 2024/9/5 下午1:25, Thomas Weißschuh wrote: > > On 2024-09-05 06:04:12+0000, Jason A. Donenfeld wrote: > >> On Thu, Sep 5, 2024 at 5:45 AM maobibo wrote: > >>> > >>> Jason, > >>> > >>> With the latest qemu 9.1 version, elf format booting is supported. > >> > >> Thanks, I just figured this out too, about 4 minutes ago. Excellent. > >> And the 1G minimum ram limit is gone too. > >> > >> Now working on how to trigger resets. > > > > With "reset" do you mean normal (non-panic) system shutdown/poweroff? > > Since QEMU 9.1 and a recent kernel you can use the pvpanic device for > > that in a cross-architecture way. > LoongArch uses acpi GED device to reboot machine. Now there is no FDT > table description and FDT driver for acpi GED device :( So you mean that QEMU exposes it via ACPI, but not via FDT, and the kernel doesn't know how to recognize it, even with ACPI?