From nobody Mon Feb 9 06:00:19 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=1568898439; cv=none; d=zoho.com; s=zohoarc; b=CHHGiAUZt4PXqYcaR3rQpsj9Ew3KJzQNmRqEAIUS06hWrbn2JWoF5+QDRRQIJ85e18OJNxnANLshS/giohkr9oy47rLtXOpsE9wGf1Jz33b8CEu5aZB0LH9ty3+XPWJuSBNJKiUUkD8BRMrxTbCjRWhWQar29QfHoV2DNleX8Vs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1568898439; 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=maSRT9TaBeu/2fU3OLEbMmjahbkZ2+VPUzO4PRMufYA=; b=lGCymh9ropzf9Ko1osUpIciwoB4b5+KyaVnLSQ8BuJQU5g09GYdpWzOykDqN0+cYgBBymPCacahu+OfHQTK0EtMFEFYd22QoyH8RpravXitq9+W7zJjBdJI54XwTKA0c01bVbrDuv9Uiz7auHAcB19/D2LGtxpq7AAfDKII72Jw= 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 1568898439131532.857471458853; Thu, 19 Sep 2019 06:07:19 -0700 (PDT) Received: from localhost ([::1]:43768 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAw9U-0005O9-QE for importer@patchew.org; Thu, 19 Sep 2019 09:07:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41418) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAvsV-0006Ji-Iy for qemu-devel@nongnu.org; Thu, 19 Sep 2019 08:49:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iAvm2-0001ic-Va for qemu-devel@nongnu.org; Thu, 19 Sep 2019 08:43:05 -0400 Received: from mx1.redhat.com ([209.132.183.28]:40736) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iAvm1-0001bO-0s; Thu, 19 Sep 2019 08:43:02 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AE82718C891B; Thu, 19 Sep 2019 12:42:57 +0000 (UTC) Received: from localhost (dhcp-192-230.str.redhat.com [10.33.192.230]) by smtp.corp.redhat.com (Postfix) with ESMTPS id D751C60BF1; Thu, 19 Sep 2019 12:42:54 +0000 (UTC) From: Cornelia Huck To: Peter Maydell Date: Thu, 19 Sep 2019 14:41:04 +0200 Message-Id: <20190919124115.11510-24-cohuck@redhat.com> In-Reply-To: <20190919124115.11510-1-cohuck@redhat.com> References: <20190919124115.11510-1-cohuck@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.70]); Thu, 19 Sep 2019 12:42:57 +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] [PULL 23/34] s390x/tcg: NC: 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: qemu-s390x@nongnu.org, Richard Henderson , qemu-devel@nongnu.org, David Hildenbrand Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" From: David Hildenbrand We can process a maximum of 256 bytes, crossing two pages. Reviewed-by: Richard Henderson Signed-off-by: David Hildenbrand --- target/s390x/mem_helper.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index a2118a82e3ca..20fc17d44de0 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -323,17 +323,26 @@ static int mmu_idx_from_as(uint8_t as) static uint32_t do_helper_nc(CPUS390XState *env, uint32_t l, uint64_t dest, uint64_t src, uintptr_t ra) { + const int mmu_idx =3D cpu_mmu_index(env, false); + S390Access srca1, srca2, desta; uint32_t i; uint8_t c =3D 0; =20 HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n", __func__, l, dest, src); =20 - for (i =3D 0; i <=3D l; i++) { - uint8_t x =3D cpu_ldub_data_ra(env, src + i, ra); - x &=3D cpu_ldub_data_ra(env, dest + i, ra); + /* NC always processes one more byte than specified - maximum is 256 */ + l++; + + srca1 =3D access_prepare(env, src, l, MMU_DATA_LOAD, mmu_idx, ra); + srca2 =3D access_prepare(env, dest, l, MMU_DATA_LOAD, mmu_idx, ra); + desta =3D access_prepare(env, dest, l, MMU_DATA_STORE, mmu_idx, ra); + for (i =3D 0; i < l; i++) { + const uint8_t x =3D access_get_byte(env, &srca1, i, ra) & + access_get_byte(env, &srca2, i, ra); + c |=3D x; - cpu_stb_data_ra(env, dest + i, x, ra); + access_set_byte(env, &desta, i, x, ra); } return c !=3D 0; } --=20 2.20.1