From patchwork Wed Aug 14 07:23:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 11093423 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C3285746 for ; Wed, 14 Aug 2019 07:25:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A4B9D28751 for ; Wed, 14 Aug 2019 07:25:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 98A4828757; Wed, 14 Aug 2019 07:25:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8721F28751 for ; Wed, 14 Aug 2019 07:25:32 +0000 (UTC) Received: from localhost ([::1]:57892 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hxnf1-0003iL-Nh for patchwork-qemu-devel@patchwork.kernel.org; Wed, 14 Aug 2019 03:25:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60543) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hxndk-0002BK-58 for qemu-devel@nongnu.org; Wed, 14 Aug 2019 03:24:13 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hxndi-0004gK-Vh for qemu-devel@nongnu.org; Wed, 14 Aug 2019 03:24:12 -0400 Received: from mx1.redhat.com ([209.132.183.28]:46866) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hxndg-0004et-Tj; Wed, 14 Aug 2019 03:24:09 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 60F957CB80; Wed, 14 Aug 2019 07:24:07 +0000 (UTC) Received: from t460s.redhat.com (ovpn-117-4.ams2.redhat.com [10.36.117.4]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8FBDE808DF; Wed, 14 Aug 2019 07:24:05 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Wed, 14 Aug 2019 09:23:51 +0200 Message-Id: <20190814072355.15333-3-david@redhat.com> In-Reply-To: <20190814072355.15333-1-david@redhat.com> References: <20190814072355.15333-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Wed, 14 Aug 2019 07:24:07 +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] [PATCH-for-4.2 v2 2/6] s390x/tcg: Rework MMU selection for instruction fetches 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 , Halil Pasic , Christian Borntraeger , qemu-s390x@nongnu.org, Richard Henderson Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Instructions are always fetched from primary address space, except when in home address mode. Perform the selection directly in cpu_mmu_index(). get_mem_index() is only used to perform data access, instructions are fetched via cpu_lduw_code(), which translates to cpu_mmu_index(env, true). We don't care about restricting the access permissions of the TLB entries anymore, as we no longer enter PRIMARY entries into the SECONDARY MMU. Cleanup related code a bit. Signed-off-by: David Hildenbrand Reviewed-by: Thomas Huth --- target/s390x/cpu.h | 7 +++++++ target/s390x/mmu_helper.c | 38 +++++++++++++++----------------------- 2 files changed, 22 insertions(+), 23 deletions(-) diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index a606547b4d..c34992bb2e 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -332,6 +332,13 @@ static inline int cpu_mmu_index(CPUS390XState *env, bool ifetch) return MMU_REAL_IDX; } + if (ifetch) { + if ((env->psw.mask & PSW_MASK_ASC) == PSW_ASC_HOME) { + return MMU_HOME_IDX; + } + return MMU_PRIMARY_IDX; + } + switch (env->psw.mask & PSW_MASK_ASC) { case PSW_ASC_PRIMARY: return MMU_PRIMARY_IDX; diff --git a/target/s390x/mmu_helper.c b/target/s390x/mmu_helper.c index 6e9c4d6151..c34e8d2021 100644 --- a/target/s390x/mmu_helper.c +++ b/target/s390x/mmu_helper.c @@ -349,8 +349,9 @@ int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc, { static S390SKeysState *ss; static S390SKeysClass *skeyclass; - int r = -1; + uint64_t asce; uint8_t key; + int r; if (unlikely(!ss)) { ss = s390_get_skeys_device(); @@ -380,36 +381,21 @@ int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc, if (!(env->psw.mask & PSW_MASK_DAT)) { *raddr = vaddr; - r = 0; - goto out; + goto nodat; } switch (asc) { case PSW_ASC_PRIMARY: PTE_DPRINTF("%s: asc=primary\n", __func__); - r = mmu_translate_asce(env, vaddr, asc, env->cregs[1], raddr, flags, - rw, exc); + asce = env->cregs[1]; break; case PSW_ASC_HOME: PTE_DPRINTF("%s: asc=home\n", __func__); - r = mmu_translate_asce(env, vaddr, asc, env->cregs[13], raddr, flags, - rw, exc); + asce = env->cregs[13]; break; case PSW_ASC_SECONDARY: PTE_DPRINTF("%s: asc=secondary\n", __func__); - /* - * Instruction: Primary - * Data: Secondary - */ - if (rw == MMU_INST_FETCH) { - r = mmu_translate_asce(env, vaddr, PSW_ASC_PRIMARY, env->cregs[1], - raddr, flags, rw, exc); - *flags &= ~(PAGE_READ | PAGE_WRITE); - } else { - r = mmu_translate_asce(env, vaddr, PSW_ASC_SECONDARY, env->cregs[7], - raddr, flags, rw, exc); - *flags &= ~(PAGE_EXEC); - } + asce = env->cregs[7]; break; case PSW_ASC_ACCREG: default: @@ -417,11 +403,17 @@ int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc, break; } - out: + /* perform the DAT translation */ + r = mmu_translate_asce(env, vaddr, asc, asce, raddr, flags, rw, exc); + if (r) { + return r; + } + +nodat: /* Convert real address -> absolute address */ *raddr = mmu_real2abs(env, *raddr); - if (r == 0 && *raddr < ram_size) { + if (*raddr < ram_size) { if (skeyclass->get_skeys(ss, *raddr / TARGET_PAGE_SIZE, 1, &key)) { trace_get_skeys_nonzero(r); return 0; @@ -441,7 +433,7 @@ int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc, } } - return r; + return 0; } /**