From nobody Mon Feb 9 00:30:55 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=1568898757; cv=none; d=zoho.com; s=zohoarc; b=kD4A0uxCGd2dJXhznzHbH6iVrQIQy+JTLT0uJL/KaD4QOOUbD86XGNtRWuf7rgJ821ZJkvj1WnXYTbFY8HM6nIII895fYbmZgnN4cTejjUapnkT14mxHmlIeSxVOknIB7cksF/4RSBnSe2aIg85/D5PGOzocjKbfpWqorVxcwco= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1568898757; 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=JRMdOneiezgteBR7huFW5NhiMY5+MyviRhH1iPmIwP8=; b=fAmIJu2PRxCKR2+6xalrllhkMRan+l5PZFcw4BflPYgS1zfYNI/exY2yQ6PExzaMd5PWxNvZUNPsCRwwGuUbC3tnQLMnggEq5+IB5CgEg/ElmN9nsQedPTpqEbtSdLMfaX5TmtmJokZId1QNnfYhhsNYghWF205p7OhnLjJ4zrI= 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 15688987578115.922301558718914; Thu, 19 Sep 2019 06:12:37 -0700 (PDT) Received: from localhost ([::1]:43810 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAwEe-0003qj-1K for importer@patchew.org; Thu, 19 Sep 2019 09:12:36 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41479) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAvsd-0006Le-FD for qemu-devel@nongnu.org; Thu, 19 Sep 2019 08:49:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iAvl7-0000Iz-GJ for qemu-devel@nongnu.org; Thu, 19 Sep 2019 08:42:06 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48628) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iAvl5-0000D4-Pi; Thu, 19 Sep 2019 08:42:04 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9328B2026F; Thu, 19 Sep 2019 12:42:01 +0000 (UTC) Received: from localhost (dhcp-192-230.str.redhat.com [10.33.192.230]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 863076013A; Thu, 19 Sep 2019 12:41:55 +0000 (UTC) From: Cornelia Huck To: Peter Maydell Date: Thu, 19 Sep 2019 14:40:50 +0200 Message-Id: <20190919124115.11510-10-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 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Thu, 19 Sep 2019 12:42:01 +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 09/34] s390x/tcg: MVCLU/MVCLE: Process max 4k bytes at a time 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 Let's stay within single pages. ... and indicate cc=3D3 in case there is work remaining. Keep unicode padding simple. While reworking, properly wrap the addresses. Reviewed-by: Richard Henderson Signed-off-by: David Hildenbrand --- target/s390x/mem_helper.c | 54 ++++++++++++++++++++++----------------- 1 file changed, 31 insertions(+), 23 deletions(-) diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index 746f64730302..86238e0163c8 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -768,8 +768,8 @@ static inline uint32_t do_mvcl(CPUS390XState *env, uint64_t *src, uint64_t *srclen, uint16_t pad, int wordsize, uintptr_t ra) { - uint64_t len =3D MIN(*srclen, *destlen); - uint32_t cc; + int len =3D MIN(*destlen, -(*dest | TARGET_PAGE_MASK)); + int i, cc; =20 if (*destlen =3D=3D *srclen) { cc =3D 0; @@ -779,32 +779,40 @@ static inline uint32_t do_mvcl(CPUS390XState *env, cc =3D 2; } =20 - /* Copy the src array */ - fast_memmove(env, *dest, *src, len, ra); - *src +=3D len; - *srclen -=3D len; - *dest +=3D len; - *destlen -=3D len; + if (!*destlen) { + return cc; + } =20 - /* Pad the remaining area */ - if (wordsize =3D=3D 1) { - fast_memset(env, *dest, pad, *destlen, ra); - *dest +=3D *destlen; - *destlen =3D 0; + /* + * Only perform one type of type of operation (move/pad) at a time. + * Stay within single pages. + */ + if (*srclen) { + /* Copy the src array */ + len =3D MIN(MIN(*srclen, -(*src | TARGET_PAGE_MASK)), len); + *destlen -=3D len; + *srclen -=3D len; + fast_memmove(env, *dest, *src, len, ra); + *src =3D wrap_address(env, *src + len); + *dest =3D wrap_address(env, *dest + len); + } else if (wordsize =3D=3D 1) { + /* Pad the remaining area */ + *destlen -=3D len; + fast_memset(env, *dest, pad, len, ra); + *dest =3D wrap_address(env, *dest + len); } else { - /* If remaining length is odd, pad with odd byte first. */ - if (*destlen & 1) { - cpu_stb_data_ra(env, *dest, pad & 0xff, ra); - *dest +=3D 1; - *destlen -=3D 1; - } - /* The remaining length is even, pad using words. */ - for (; *destlen; *dest +=3D 2, *destlen -=3D 2) { - cpu_stw_data_ra(env, *dest, pad, ra); + /* The remaining length selects the padding byte. */ + for (i =3D 0; i < len; (*destlen)--, i++) { + if (*destlen & 1) { + cpu_stb_data_ra(env, *dest, pad, ra); + } else { + cpu_stb_data_ra(env, *dest, pad >> 8, ra); + } + *dest =3D wrap_address(env, *dest + 1); } } =20 - return cc; + return *destlen ? 3 : cc; } =20 /* move long */ --=20 2.20.1