From patchwork Fri Jul 3 10:06:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 11641631 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0A27013BD for ; Fri, 3 Jul 2020 10:08:10 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id D590F20720 for ; Fri, 3 Jul 2020 10:08:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="DjsONlli" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D590F20720 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:40552 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jrIc5-00059D-3s for patchwork-qemu-devel@patchwork.kernel.org; Fri, 03 Jul 2020 06:08:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56540) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jrIbC-0003Mv-DJ for qemu-devel@nongnu.org; Fri, 03 Jul 2020 06:07:14 -0400 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:49565 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jrIbA-0005X7-LX for qemu-devel@nongnu.org; Fri, 03 Jul 2020 06:07:14 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593770831; 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=WXcLYdyAsOR9Mteeheh8+N7Y20u/vLKQhDl19KIwhTU=; b=DjsONlliAUcqtJYohrtAU6HczwooZEFkITH+S/y6rsEFyA3xhc4e7wL91UMtJPNBvga53q 2Bf8R02gaHFCwTDz/BPW7uUgZp3N5N1OJD1CZBJ3MPOcaN5AeXIx0ZZ+S2rV8GtEbemkF7 KhCPA5oB0iYBo1r9puOn4YBelwLwnyU= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-492-bk50CHWRNFONyPWL90zUnA-1; Fri, 03 Jul 2020 06:07:09 -0400 X-MC-Unique: bk50CHWRNFONyPWL90zUnA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B0CA4800C64; Fri, 3 Jul 2020 10:07:08 +0000 (UTC) Received: from localhost (ovpn-113-54.ams2.redhat.com [10.36.113.54]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 873CF1053B1B; Fri, 3 Jul 2020 10:07:05 +0000 (UTC) From: Cornelia Huck To: Peter Maydell Subject: [PULL 04/14] pc-bios: s390x: Get rid of magic offsets into the lowcore Date: Fri, 3 Jul 2020 12:06:40 +0200 Message-Id: <20200703100650.621212-5-cohuck@redhat.com> In-Reply-To: <20200703100650.621212-1-cohuck@redhat.com> References: <20200703100650.621212-1-cohuck@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=cohuck@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.61; envelope-from=cohuck@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/03 03:17:33 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, 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=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Huth , Janosch Frank , David Hildenbrand , Cornelia Huck , qemu-devel@nongnu.org, qemu-s390x@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Janosch Frank If we have a lowcore struct that has members for offsets that we want to touch, why not use it? Signed-off-by: Janosch Frank Reviewed-by: David Hildenbrand Reviewed-by: Thomas Huth Reviewed-by: Cornelia Huck Message-Id: <20200624075226.92728-5-frankja@linux.ibm.com> Signed-off-by: Thomas Huth --- pc-bios/s390-ccw/cio.h | 17 +++++++++++------ pc-bios/s390-ccw/main.c | 8 +++----- 2 files changed, 14 insertions(+), 11 deletions(-) diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h index aaa432deddb9..1e5d4e92e12c 100644 --- a/pc-bios/s390-ccw/cio.h +++ b/pc-bios/s390-ccw/cio.h @@ -122,12 +122,17 @@ typedef struct schib { } __attribute__ ((packed, aligned(4))) Schib; typedef struct subchannel_id { - __u32 cssid:8; - __u32:4; - __u32 m:1; - __u32 ssid:2; - __u32 one:1; - __u32 sch_no:16; + union { + struct { + __u16 cssid:8; + __u16 reserved:4; + __u16 m:1; + __u16 ssid:2; + __u16 one:1; + }; + __u16 sch_id; + }; + __u16 sch_no; } __attribute__ ((packed, aligned(4))) SubChannelId; struct chsc_header { diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c index 4e65b411e1d8..8b912454c940 100644 --- a/pc-bios/s390-ccw/main.c +++ b/pc-bios/s390-ccw/main.c @@ -36,11 +36,9 @@ LowCore *lowcore; /* Yes, this *is* a pointer to address 0 */ */ void write_subsystem_identification(void) { - SubChannelId *schid = (SubChannelId *) 184; - uint32_t *zeroes = (uint32_t *) 188; - - *schid = blk_schid; - *zeroes = 0; + lowcore->subchannel_id = blk_schid.sch_id; + lowcore->subchannel_nr = blk_schid.sch_no; + lowcore->io_int_parm = 0; } void write_iplb_location(void)