From nobody Sun Nov 24 08:52:59 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1725991135; cv=none; d=zohomail.com; s=zohoarc; b=Z7hl9orHK+raZD4NCP3Dh/jXOHxN0tOgV4b2GNFwtjJeGZKNODVPdja+yMYJnWcAudWNwMnY+eArzfmVcoYRs0DUTT9bu2TLrXWWavZeq7iYTsaDbVV2YL7aqf5mM0uvJ2yK5KPx+sKtNjIOrX7cdjlNmi/IghY8tgT5hKfU5OY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1725991135; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=JocpYcC+QFf1LAhnFndqLcQmZ38s1CCcvmmdPsn8swM=; b=J5CxoajKfr40jewDPWYzyOpRvsEHbXZrSAnzG34MMaHYkfaXqqKbf8ZK5InbU7G1C7u2RvIy73C5BnECVjGraFnutESixFUhxGYRCXh9iXTACXmtjuJLQFbiIVOzTMyXojoNv1s/iKD7EDTZSyiVdg5D3C1gaHRfaNqaXAE6dgA= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1725991135622921.6095731614837; Tue, 10 Sep 2024 10:58:55 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1so58L-0004Py-0L; Tue, 10 Sep 2024 13:58:33 -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 1so58G-0004DO-Om for qemu-devel@nongnu.org; Tue, 10 Sep 2024 13:58:28 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1so58F-0006NR-2u for qemu-devel@nongnu.org; Tue, 10 Sep 2024 13:58:28 -0400 Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-692-P9UMfzoGP4eb29lgYnER_A-1; Tue, 10 Sep 2024 13:58:23 -0400 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id B0E521955D47; Tue, 10 Sep 2024 17:58:21 +0000 (UTC) Received: from t14s.redhat.com (unknown [10.22.32.182]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id B2B7A1956060; Tue, 10 Sep 2024 17:58:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1725991106; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=JocpYcC+QFf1LAhnFndqLcQmZ38s1CCcvmmdPsn8swM=; b=FefBXN3F8bweh1u79VVBYVGG/hlqxnZ4htgdrrqc3niUrK7iKwwA72b7h6X3XjMWTZ/qKf 6E5z3zlxDS5wXTtwR+3UuY++ahgy5O/JKwT1ujZLAko90bWh+L7+IpjTUrhaIXmV70ruv2 gCAtckwZW7C5Z6A6npks1DuMlXzmvg8= X-MC-Unique: P9UMfzoGP4eb29lgYnER_A-1 From: David Hildenbrand To: qemu-devel@nongnu.org Cc: qemu-s390x@nongnu.org, David Hildenbrand , Paolo Bonzini , Thomas Huth , Halil Pasic , Christian Borntraeger , Eric Farman , Richard Henderson , Ilya Leoshkevich , Janosch Frank , "Michael S. Tsirkin" , Cornelia Huck Subject: [PATCH v1 01/14] s390x/s390-virtio-ccw: don't crash on weird RAM sizes Date: Tue, 10 Sep 2024 19:57:56 +0200 Message-ID: <20240910175809.2135596-2-david@redhat.com> In-Reply-To: <20240910175809.2135596-1-david@redhat.com> References: <20240910175809.2135596-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=david@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.145, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1725991136669116600 Content-Type: text/plain; charset="utf-8" KVM is not happy when starting a VM with weird RAM sizes: # qemu-system-s390x --enable-kvm --nographic -m 1234K qemu-system-s390x: kvm_set_user_memory_region: KVM_SET_USER_MEMORY_REGION failed, slot=3D0, start=3D0x0, size=3D0x244000: Invalid argument kvm_set_phys_mem: error registering slot: Invalid argument Aborted (core dumped) Let's handle that in a better way by rejecting such weird RAM sizes right from the start: # qemu-system-s390x --enable-kvm --nographic -m 1234K qemu-system-s390x: ram size must be multiples of 1 MiB Signed-off-by: David Hildenbrand Acked-by: Janosch Frank Reviewed-by: Eric Farman Reviewed-by: Thomas Huth --- hw/s390x/s390-virtio-ccw.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 18240a0fd8..e30cf0a2a1 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -180,6 +180,17 @@ static void s390_memory_init(MemoryRegion *ram) { MemoryRegion *sysmem =3D get_system_memory(); =20 + if (!QEMU_IS_ALIGNED(memory_region_size(ram), 1 * MiB)) { + /* + * The SCLP cannot possibly expose smaller granularity right now a= nd KVM + * cannot handle smaller granularity. As we don't support NUMA, the + * region size directly corresponds to machine->ram_size, and the = region + * is a single RAM memory region. + */ + error_report("ram size must be multiples of 1 MiB"); + exit(EXIT_FAILURE); + } + /* allocate RAM for core */ memory_region_add_subregion(sysmem, 0, ram); =20 --=20 2.46.0