From patchwork Wed Sep 18 15:29:11 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 11150765 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 5C82A195A for ; Wed, 18 Sep 2019 16:37:53 +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 3E0E721907 for ; Wed, 18 Sep 2019 16:37:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3E0E721907 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]:60794 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAcxj-0005gA-VC for patchwork-qemu-devel@patchwork.kernel.org; Wed, 18 Sep 2019 12:37:51 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50776) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAbvY-00027c-V4 for qemu-devel@nongnu.org; Wed, 18 Sep 2019 11:31:34 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iAbvW-0000cL-WD for qemu-devel@nongnu.org; Wed, 18 Sep 2019 11:31:32 -0400 Received: from mx1.redhat.com ([209.132.183.28]:29340) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iAbvW-0000bU-MR; Wed, 18 Sep 2019 11:31:30 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9D1D269094; Wed, 18 Sep 2019 15:31:29 +0000 (UTC) Received: from t460s.redhat.com (ovpn-117-119.ams2.redhat.com [10.36.117.119]) by smtp.corp.redhat.com (Postfix) with ESMTP id 75F115D721; Wed, 18 Sep 2019 15:31:22 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Wed, 18 Sep 2019 17:29:11 +0200 Message-Id: <20190918152922.18949-19-david@redhat.com> In-Reply-To: <20190918152922.18949-1-david@redhat.com> References: <20190918152922.18949-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Wed, 18 Sep 2019 15:31:29 +0000 (UTC) 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 SUBSYSTEM s390x 18/29] s390x/tcg: MVCS/MVCP: Use access_memmove() 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 , David Hildenbrand , Cornelia Huck , Richard Henderson , qemu-s390x@nongnu.org, Richard Henderson Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" As we are moving between address spaces, we can use access_memmove() without checking for destructive overlaps (especially of real storage locations): "Each storage operand is processed left to right. The storage-operand-consistency rules are the same as for MOVE (MVC), except that when the operands overlap in real storage, the use of the common real- storage locations is not necessarily recognized." Reviewed-by: Richard Henderson Signed-off-by: David Hildenbrand --- target/s390x/mem_helper.c | 26 ++++++++++++-------------- 1 file changed, 12 insertions(+), 14 deletions(-) diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index e50cec9263..6b85f44e22 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -2086,8 +2086,9 @@ uint32_t HELPER(rrbe)(CPUS390XState *env, uint64_t r2) uint32_t HELPER(mvcs)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2) { const uint8_t psw_as = (env->psw.mask & PSW_MASK_ASC) >> PSW_SHIFT_ASC; + S390Access srca, desta; uintptr_t ra = GETPC(); - int cc = 0, i; + int cc = 0; HELPER_LOG("%s: %16" PRIx64 " %16" PRIx64 " %16" PRIx64 "\n", __func__, l, a1, a2); @@ -2106,20 +2107,19 @@ uint32_t HELPER(mvcs)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2) return cc; } - /* XXX replace w/ memcpy */ - for (i = 0; i < l; i++) { - uint8_t x = cpu_ldub_primary_ra(env, a2 + i, ra); - cpu_stb_secondary_ra(env, a1 + i, x, ra); - } - + /* TODO: Access key handling */ + srca = access_prepare(env, a2, l, MMU_DATA_LOAD, MMU_PRIMARY_IDX, ra); + desta = access_prepare(env, a1, l, MMU_DATA_STORE, MMU_SECONDARY_IDX, ra); + access_memmove(env, &desta, &srca, ra); return cc; } uint32_t HELPER(mvcp)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2) { const uint8_t psw_as = (env->psw.mask & PSW_MASK_ASC) >> PSW_SHIFT_ASC; + S390Access srca, desta; uintptr_t ra = GETPC(); - int cc = 0, i; + int cc = 0; HELPER_LOG("%s: %16" PRIx64 " %16" PRIx64 " %16" PRIx64 "\n", __func__, l, a1, a2); @@ -2138,12 +2138,10 @@ uint32_t HELPER(mvcp)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2) return cc; } - /* XXX replace w/ memcpy */ - for (i = 0; i < l; i++) { - uint8_t x = cpu_ldub_secondary_ra(env, a2 + i, ra); - cpu_stb_primary_ra(env, a1 + i, x, ra); - } - + /* TODO: Access key handling */ + srca = access_prepare(env, a2, l, MMU_DATA_LOAD, MMU_SECONDARY_IDX, ra); + desta = access_prepare(env, a1, l, MMU_DATA_STORE, MMU_PRIMARY_IDX, ra); + access_memmove(env, &desta, &srca, ra); return cc; }