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[170.10.129.124]) by mx.google.com with ESMTPS id o191-20020a3741c8000000b0071d18e31edesi6263859qka.166.2023.03.06.00.47.17 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Mar 2023 00:47:18 -0800 (PST) Received-SPF: pass (google.com: domain of thuth@redhat.com designates 170.10.129.124 as permitted sender) client-ip=170.10.129.124; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=ByIlNLDw; spf=pass (google.com: domain of thuth@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=thuth@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1678092437; 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=Tu4fLVUa5CKH9yGWFtuNR/Tn/c+l+6gsZNxsu/a/pnc=; b=ByIlNLDwb6LDeAYU+vUZHPccOcfthy0mS9BpjFlsIrHH8CXMd58EPcbp7MM/QO7o8/Mild TLoa86NJ13xrie3btLLnWHZYhSmyrncL/SegN+/whM49QdsCzIXJg8009GTL9rJrfSA3V+ QbwoWyCpvIgS9HdeYh80k7Qft3gN3Zs= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-67-cbgnrg-hNoiPEn6lO3Smbg-1; Mon, 06 Mar 2023 03:47:14 -0500 X-MC-Unique: cbgnrg-hNoiPEn6lO3Smbg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 54444185A7A4; Mon, 6 Mar 2023 08:47:13 +0000 (UTC) Received: from thuth.com (unknown [10.39.193.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id DF4AC440DE; Mon, 6 Mar 2023 08:47:10 +0000 (UTC) From: Thomas Huth To: qemu-devel@nongnu.org, Peter Maydell , Daniel Berrange , Paolo Bonzini Cc: Markus Armbruster , =?UTF-8?q?Alex=20Benn=C3=A9e?= , qemu-arm@nongnu.org, Maxim Levitsky , libvir-list@redhat.com, Richard Henderson , xen-devel@lists.xenproject.org, Reinoud Zandijk , Wilfred Mallawa , John Paul Adrian Glaubitz Subject: [PATCH v4 4/5] docs/about/deprecated: Deprecate 32-bit arm hosts for system emulation Date: Mon, 6 Mar 2023 09:46:57 +0100 Message-Id: <20230306084658.29709-5-thuth@redhat.com> In-Reply-To: <20230306084658.29709-1-thuth@redhat.com> References: <20230306084658.29709-1-thuth@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 X-TUID: hGA8NR69Edjp For running QEMU in system emulation mode, the user needs a rather strong host system, i.e. not only an embedded low-frequency controller. All recent beefy arm host machines should support 64-bit now, it's unlikely that anybody is still seriously using QEMU on a 32-bit arm CPU, so we deprecate the 32-bit arm hosts here to finally save use some time and precious CI minutes. Reviewed-by: Daniel P. Berrangé Reviewed-by: Wilfred Mallawa Signed-off-by: Thomas Huth --- docs/about/deprecated.rst | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst index c4fcc6b33c..f0de517dc2 100644 --- a/docs/about/deprecated.rst +++ b/docs/about/deprecated.rst @@ -220,6 +220,15 @@ be an effective use of its limited resources, and thus intends to discontinue it. Since all recent x86 hardware from the past >10 years is capable of the 64-bit x86 extensions, a corresponding 64-bit OS should be used instead. +System emulation on 32-bit arm hosts (since 8.0) +'''''''''''''''''''''''''''''''''''''''''''''''' + +Since QEMU needs a strong host machine for running full system emulation, and +all recent powerful arm hosts support 64-bit, the QEMU project deprecates the +support for running any system emulation on 32-bit arm hosts in general. Use +64-bit arm hosts for system emulation instead. (Note: "user" mode emulation +continuous to be supported on 32-bit arm hosts, too) + QEMU API (QAPI) events ---------------------- -- 2.31.1