From nobody Tue Feb 10 01:15:55 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=1566483057; cv=none; d=zoho.com; s=zohoarc; b=l9DdHRqpmbG41U4VCasOKwZ/hCbRN84FznZ1YYGrZSy75NYrBJdmnxlD8JAxVV2EttB4QExWvjzI1NG4BeG+XniMgnfnpTeR6hIFhcG2/NwTQBpNnOnMhI01thJverdSo7x/U0TzBNeQJyApBm8lbQl5RBJ86mwjoCfK3BL4L6o= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1566483057; 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=o/CWLdZNzcw/Wmcdx3hlCnU9GtAFJBkblk+Jar8eUSI=; b=H5dYF/J7o/ykgaeZHmIAj7+S7YOm3i/URJTTpV7Er2F/EwzFm/OS2WVn/qtRgDDXziwvjuQA/21uWU/CU0dAzj+gGjV36BzWIakSAjJFX5Wxzl+LtIrffpfDcsqeY+0n/UKerTeJq3O7nWYj+cazJVpshnMDUQ/+bJ80XC9Y538= 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 1566483057017505.40639818360455; Thu, 22 Aug 2019 07:10:57 -0700 (PDT) Received: from localhost ([::1]:43630 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i0nnj-0004mI-Ph for importer@patchew.org; Thu, 22 Aug 2019 10:10:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48433) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i0ncE-0000CN-Ji for qemu-devel@nongnu.org; Thu, 22 Aug 2019 09:59:03 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i0ncD-0004J0-AI for qemu-devel@nongnu.org; Thu, 22 Aug 2019 09:59:02 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51350) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i0ncD-0004IE-3D; Thu, 22 Aug 2019 09:59:01 -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 650B48D6CC6; Thu, 22 Aug 2019 13:59:00 +0000 (UTC) Received: from localhost (dhcp-192-222.str.redhat.com [10.33.192.222]) by smtp.corp.redhat.com (Postfix) with ESMTPS id BB4E160606; Thu, 22 Aug 2019 13:58:57 +0000 (UTC) From: Cornelia Huck To: Peter Maydell Date: Thu, 22 Aug 2019 15:58:36 +0200 Message-Id: <20190822135839.32340-6-cohuck@redhat.com> In-Reply-To: <20190822135839.32340-1-cohuck@redhat.com> References: <20190822135839.32340-1-cohuck@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-4.6.2 (mx1.redhat.com [10.5.110.69]); Thu, 22 Aug 2019 13:59:00 +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 4/7] 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 , qemu-s390x@nongnu.org, Cornelia Huck , 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 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. Reviewed-by: Thomas Huth Signed-off-by: David Hildenbrand Reviewed-by: Cornelia Huck Message-Id: <20190816084708.602-4-david@redhat.com> Signed-off-by: Cornelia Huck --- 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 3d9de25f7ce3..79202c098096 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -332,6 +332,13 @@ static inline int cpu_mmu_index(CPUS390XState *env, bo= ol ifetch) return MMU_REAL_IDX; } =20 + if (ifetch) { + if ((env->psw.mask & PSW_MASK_ASC) =3D=3D 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 6cf74502ef1e..40b6c1fc36a9 100644 --- a/target/s390x/mmu_helper.c +++ b/target/s390x/mmu_helper.c @@ -350,8 +350,9 @@ int mmu_translate(CPUS390XState *env, target_ulong vadd= r, int rw, uint64_t asc, { static S390SKeysState *ss; static S390SKeysClass *skeyclass; - int r =3D -1; + uint64_t asce; uint8_t key; + int r; =20 if (unlikely(!ss)) { ss =3D s390_get_skeys_device(); @@ -381,36 +382,21 @@ int mmu_translate(CPUS390XState *env, target_ulong va= ddr, int rw, uint64_t asc, =20 if (!(env->psw.mask & PSW_MASK_DAT)) { *raddr =3D vaddr; - r =3D 0; - goto out; + goto nodat; } =20 switch (asc) { case PSW_ASC_PRIMARY: PTE_DPRINTF("%s: asc=3Dprimary\n", __func__); - r =3D mmu_translate_asce(env, vaddr, asc, env->cregs[1], raddr, fl= ags, - rw, exc); + asce =3D env->cregs[1]; break; case PSW_ASC_HOME: PTE_DPRINTF("%s: asc=3Dhome\n", __func__); - r =3D mmu_translate_asce(env, vaddr, asc, env->cregs[13], raddr, f= lags, - rw, exc); + asce =3D env->cregs[13]; break; case PSW_ASC_SECONDARY: PTE_DPRINTF("%s: asc=3Dsecondary\n", __func__); - /* - * Instruction: Primary - * Data: Secondary - */ - if (rw =3D=3D MMU_INST_FETCH) { - r =3D mmu_translate_asce(env, vaddr, PSW_ASC_PRIMARY, env->cre= gs[1], - raddr, flags, rw, exc); - *flags &=3D ~(PAGE_READ | PAGE_WRITE); - } else { - r =3D mmu_translate_asce(env, vaddr, PSW_ASC_SECONDARY, env->c= regs[7], - raddr, flags, rw, exc); - *flags &=3D ~(PAGE_EXEC); - } + asce =3D env->cregs[7]; break; case PSW_ASC_ACCREG: default: @@ -418,11 +404,17 @@ int mmu_translate(CPUS390XState *env, target_ulong va= ddr, int rw, uint64_t asc, break; } =20 - out: + /* perform the DAT translation */ + r =3D mmu_translate_asce(env, vaddr, asc, asce, raddr, flags, rw, exc); + if (r) { + return r; + } + +nodat: /* Convert real address -> absolute address */ *raddr =3D mmu_real2abs(env, *raddr); =20 - if (r =3D=3D 0 && *raddr < ram_size) { + if (*raddr < ram_size) { r =3D skeyclass->get_skeys(ss, *raddr / TARGET_PAGE_SIZE, 1, &key); if (r) { trace_get_skeys_nonzero(r); @@ -444,7 +436,7 @@ int mmu_translate(CPUS390XState *env, target_ulong vadd= r, int rw, uint64_t asc, } } =20 - return r; + return 0; } =20 /** --=20 2.20.1