From nobody Mon Feb 9 07:56:32 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1567757995; cv=none; d=zoho.com; s=zohoarc; b=bOt4GYxGNKSXnQR47W62SbQFVjcWZxdOdAM1BQk6kMLSqdMfH3fad47MygUrCIWHrBJFOtzj7VPF0CfRV+DQtqSGld2ZriEq6Qv8OQblwKQDGO0gONE2IsIOkzo/Jkkb7cyv9TDvm8UW98sr5AuiI9v089xJmDv5rUlxeZF4OOE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1567757995; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=S/mV32l7wTBxvF53+IdzRiqyvUbSms6xvRqjBO/M80g=; b=WL0OwfYtQ23Ya7xZ1YQ063V8fLV0lZmm4n+vxHk6dPJRDMTHfK67XlXv0ciEkUIqkzxlQ0QsadctRsWpUiTemgOkkiwtKY2luk70D3eQsi9PFn2+tLZrmaCf4gCUz/hB9hv3Hgz0Zo6aaAzMnB5wC7wE+JXGIXG2eZYFKmnPsJE= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1567757995840505.5714624707201; Fri, 6 Sep 2019 01:19:55 -0700 (PDT) Received: from localhost ([::1]:53386 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i69TG-0002eK-Fs for importer@patchew.org; Fri, 06 Sep 2019 04:19:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42549) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i6994-0004P6-Nt for qemu-devel@nongnu.org; Fri, 06 Sep 2019 03:59:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i6992-0003jH-LY for qemu-devel@nongnu.org; Fri, 06 Sep 2019 03:59:02 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33608) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i6992-0003g2-3G; Fri, 06 Sep 2019 03:59:00 -0400 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 mx1.redhat.com (Postfix) with ESMTPS id 33FC018C4272; Fri, 6 Sep 2019 07:58:56 +0000 (UTC) Received: from t460s.redhat.com (ovpn-117-162.ams2.redhat.com [10.36.117.162]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8B3B41001955; Fri, 6 Sep 2019 07:58:54 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Fri, 6 Sep 2019 09:57:47 +0200 Message-Id: <20190906075750.14791-26-david@redhat.com> In-Reply-To: <20190906075750.14791-1-david@redhat.com> References: <20190906075750.14791-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.62]); Fri, 06 Sep 2019 07:58:56 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 25/28] s390x/tcg: MVZ: Fault-safe handling 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: Florian Weimer , Thomas Huth , David Hildenbrand , Cornelia Huck , Stefano Brivio , qemu-s390x@nongnu.org, Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" We can process a maximum of 256 bytes, crossing two pages. Signed-off-by: David Hildenbrand Reviewed-by: Richard Henderson --- target/s390x/mem_helper.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index 5e38b2c4d8..4c67c6f37e 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -545,13 +545,21 @@ void HELPER(mvo)(CPUS390XState *env, uint32_t l, uint= 64_t dest, uint64_t src) /* move zones */ void HELPER(mvz)(CPUS390XState *env, uint32_t l, uint64_t dest, uint64_t s= rc) { + S390Access srca1, srca2, desta; uintptr_t ra =3D GETPC(); int i; =20 - for (i =3D 0; i <=3D l; i++) { - uint8_t b =3D cpu_ldub_data_ra(env, dest + i, ra) & 0x0f; - b |=3D cpu_ldub_data_ra(env, src + i, ra) & 0xf0; - cpu_stb_data_ra(env, dest + i, b, ra); + /* MVZ always copies one more byte than specified - maximum is 256 */ + l++; + + srca1 =3D access_prepare(env, src, l, MMU_DATA_LOAD, ra); + srca2 =3D access_prepare(env, dest, l, MMU_DATA_LOAD, ra); + desta =3D access_prepare(env, dest, l, MMU_DATA_STORE, ra); + for (i =3D 0; i < l; i++) { + const uint8_t x =3D (access_get_byte(env, &srca1, i, ra) & 0xf0) | + (access_get_byte(env, &srca2, i, ra) & 0x0f); + + access_set_byte(env, &desta, i, x, ra); } } =20 --=20 2.21.0