From nobody Sat Nov 23 23:43:50 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=1728384955; cv=none; d=zohomail.com; s=zohoarc; b=FfgmNOyb8EZpBfUt37mESNaSy4TX7hkKwFpcYzOb2xRacgyWZIThb4PfSIMDzy2KF8In8BzSbMWKc6cVECuc2DLR4c9J5xMGtPEbM9oOphJOH9DjuiPTbdthRO6aurzwRNYgAqCebGDdh8TeC7PPBm9xUW5iAN/UyRSNMgbEOwI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1728384955; 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=UwCj+hgqyB9x40oN682O/EprONvoL/7W9oor1YYT55A=; b=KVy9XKCsrpCyl0cWP+9mlHvWdvTuGJO79YYnICJqaq/iDP7zXjsLEMXcBm7weVq9rK9oE/C+ndrAwj9zKfobFXHbmZKXVKkYjLQknfj+TpGfHL8z01c6wTxwXV6j+vrta0/gslNGqjRJ4Uqh7AudmulsOp651owrU4qN1ffm7wg= 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 1728384955234382.1947658586562; Tue, 8 Oct 2024 03:55:55 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sy7s9-0001IZ-F6; Tue, 08 Oct 2024 06:55:21 -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 1sy7s4-0001HV-9r for qemu-devel@nongnu.org; Tue, 08 Oct 2024 06:55:19 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sy7s2-0001d3-VL for qemu-devel@nongnu.org; Tue, 08 Oct 2024 06:55:16 -0400 Received: from mx-prod-mc-02.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-413-5wXBN5JRMy2_3UUA9sZW0w-1; Tue, 08 Oct 2024 06:55:10 -0400 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (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-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3EBC51955EAD; Tue, 8 Oct 2024 10:55:09 +0000 (UTC) Received: from t14s.fritz.box (unknown [10.22.16.102]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 7861619560A3; Tue, 8 Oct 2024 10:55:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1728384913; 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=UwCj+hgqyB9x40oN682O/EprONvoL/7W9oor1YYT55A=; b=ZKTkPP+BK7JZX2+0I2KDtMoi/pdAQu5b5zn+wB0Azzhh1HX8VqVS8Jt688CLUIFIS2okkW +x0kUCVpVeNQHzfMLPy4bv+9Usus7kvuOG/GMKiqJ+J8mjIU5GTA4sbXorsTAcyLY1Rzv6 D/Zf7jeBzBbYYsG4y6iv38bs9sUtgB0= X-MC-Unique: 5wXBN5JRMy2_3UUA9sZW0w-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 , Nina Schoetterl-Glausch , Heiko Carstens , Ilya Leoshkevich , Janosch Frank , "Michael S. Tsirkin" , Cornelia Huck Subject: [PATCH v2 01/14] s390x/s390-virtio-ccw: don't crash on weird RAM sizes Date: Tue, 8 Oct 2024 12:54:42 +0200 Message-ID: <20241008105455.2302628-2-david@redhat.com> In-Reply-To: <20241008105455.2302628-1-david@redhat.com> References: <20241008105455.2302628-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 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=170.10.129.124; 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=-0.153, 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, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: 1728384956523116600 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 Acked-by: Michael S. Tsirkin Reviewed-by: Eric Farman Reviewed-by: Thomas Huth Acked-by: Janosch Frank Signed-off-by: David Hildenbrand --- 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 5aa8d207a3..b88ec8e78a 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)) { + /* + * SCLP cannot possibly expose smaller granularity right now and K= VM + * 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 2.46.1