From nobody Wed Feb 11 08:23:50 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1689349810; cv=none; d=zohomail.com; s=zohoarc; b=M4yhwycMQtNwtd7PZteSVgck4cPTClN2rzwdk4lpRNqwSkih4T/W0WK5ouY4z4/ScS6wECn+i/34KCKiF0HP5Vo1I8jTdzjYna6ICuXsjR/WNqvkRrnaNy5Cho+ieSMAXo6PGn3todmHGX/bxkLV3ZPZ2TZPtYsIOwMDuB4q1C8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1689349810; h=Content-Transfer-Encoding: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; bh=eumrElobNKY7spGfBeTnnGIQlpKlfLkNgQIpTApqm4A=; b=jSR2zDvsAn2sejbGbr64Dl3Yw+LkKtDwVGxoBAyAwa2PEYZY/hZQQJe7Y0ehtL7SPwirrN2pBtwxOVsByUI6Tl/eZ6aRizyRlDuU4z8hsLb+LT8k+CBU79i0mMvaAThf4o1aKfwqd3zy5XBFSi8vX+UpeFw4bHgkXlR77Qp+KOo= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 16893498103291022.4445884501037; Fri, 14 Jul 2023 08:50:10 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qKL0W-0007EO-EO; Fri, 14 Jul 2023 11:47:00 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qKL0T-0007Bi-DH for qemu-devel@nongnu.org; Fri, 14 Jul 2023 11:46:57 -0400 Received: from mail-wr1-x433.google.com ([2a00:1450:4864:20::433]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qKL0P-000750-I3 for qemu-devel@nongnu.org; Fri, 14 Jul 2023 11:46:57 -0400 Received: by mail-wr1-x433.google.com with SMTP id ffacd0b85a97d-314313f127fso2163774f8f.1 for ; Fri, 14 Jul 2023 08:46:53 -0700 (PDT) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id t16-20020a5d49d0000000b003143bb5ecd5sm11214025wrs.69.2023.07.14.08.46.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Jul 2023 08:46:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1689349612; x=1691941612; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=eumrElobNKY7spGfBeTnnGIQlpKlfLkNgQIpTApqm4A=; b=cOMxZxTZSusyAN7gU2a2FwtyDh6UbYDuXmLaARWxcgFkn6B9v6aDW5s0o5CXNlOzzb XyiUh6M7HwiUkVwGEawzRPjpEfsJHKivHo6hYemogucxjX5l0UtkN/ViMCkbFoIMQpIQ NSqFxTENp3cg9IQNo+BDhjW1Qb1lezkmSDUNNbv1f+gxCeIsnkIOewXz+Fqf7HdM8y5g BmtEFyeMaZPP9xAGvcOeDyDeURLMvoW5pg2drDZzxn/dc0sI8A9vUqj5O2VYGI3ArN7F e7xd8/xBJpLOWzQ0KcB5ebnLn7Ersu6dMJWVVa7ZWdWdg4T8qV12yn6ILHTMngrS/OEb ZJcw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689349612; x=1691941612; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=eumrElobNKY7spGfBeTnnGIQlpKlfLkNgQIpTApqm4A=; b=SMK0zeNojzfR8ZflE7J3a/FLHIO+dcgOHyBPCo29LfD6Yimo8HNXkNGRKM1bKleswa n4ywEOksQ8i+MAL9JNd4NIg23Uf+F5u+6OTFB3G7ZcpFSTJu7D8lC6KpP3nXHkTiyc/n AixGkDJzIcUmF0oy/tYnmUCDSuFo3+aKSIZ3EcQleGiIuGYWxqF1L+Kc6O3rADB1OFpg pJTSChhmFoaKZtPLXtEFhNEATCbGZr0xTyIX0Dkb9yFQdh5NKBG5yh+RoEbaVlMflGDg zuD4tOuAcP3mGKLiOBG7LQ9mZg7+JTqRJIdrM8ThfWm+CXHxxA6nsYZBCUQyBqU+sdYR 4EpQ== X-Gm-Message-State: ABy/qLZ6VwAJIyckF5NdpBiifNszmqZ53+9EzetCYua1UTL3Z9Q7qkyo 0htce+7tEO67bp2i8OrIPXKtR5nNIq3xexssWqE= X-Google-Smtp-Source: APBJJlG96jPDU9YWXsh5g5q6dl6Rl2Sb8Ung5tP/U7zknyxDrzJzO6GU3BwPFeRZSyBRnW+RCXqdRg== X-Received: by 2002:adf:e8cb:0:b0:313:e146:1816 with SMTP id k11-20020adfe8cb000000b00313e1461816mr4235335wrn.24.1689349611852; Fri, 14 Jul 2023 08:46:51 -0700 (PDT) From: Peter Maydell To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH 02/14] target/arm/ptw: Don't report GPC faults on stage 1 ptw as stage2 faults Date: Fri, 14 Jul 2023 16:46:36 +0100 Message-Id: <20230714154648.327466-3-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230714154648.327466-1-peter.maydell@linaro.org> References: <20230714154648.327466-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=2a00:1450:4864:20::433; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x433.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1689349811148100001 Content-Type: text/plain; charset="utf-8" In S1_ptw_translate() we set up the ARMMMUFaultInfo if the attempt to translate the page descriptor address into a physical address fails. This used to only be possible if we are doing a stage 2 ptw for that descriptor address, and so the code always sets fi->stage2 and fi->s1ptw to true. However, with FEAT_RME it is also possible for the lookup of the page descriptor address to fail because of a Granule Protection Check fault. These should not be reported as stage 2, otherwise arm_deliver_fault() will incorrectly set HPFAR_EL2. Similarly the s1ptw bit should only be set for stage 2 faults on stage 1 translation table walks, i.e. not for GPC faults. Add a comment to the the other place where we might detect a stage2-fault-on-stage-1-ptw, in arm_casq_ptw(), noting why we know in that case that it must really be a stage 2 fault and not a GPC fault. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson --- target/arm/ptw.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/target/arm/ptw.c b/target/arm/ptw.c index bafeb876ad7..eb57ebd897b 100644 --- a/target/arm/ptw.c +++ b/target/arm/ptw.c @@ -600,8 +600,8 @@ static bool S1_ptw_translate(CPUARMState *env, S1Transl= ate *ptw, fi->type =3D ARMFault_GPCFOnWalk; } fi->s2addr =3D addr; - fi->stage2 =3D true; - fi->s1ptw =3D true; + fi->stage2 =3D regime_is_stage2(s2_mmu_idx); + fi->s1ptw =3D fi->stage2; fi->s1ns =3D !is_secure; return false; } @@ -719,6 +719,12 @@ static uint64_t arm_casq_ptw(CPUARMState *env, uint64_= t old_val, env->tlb_fi =3D NULL; =20 if (unlikely(flags & TLB_INVALID_MASK)) { + /* + * We know this must be a stage 2 fault because the granule + * protection table does not separately track read and write + * permission, so all GPC faults are caught in S1_ptw_translat= e(): + * we only get here for "readable but not writeable". + */ assert(fi->type !=3D ARMFault_None); fi->s2addr =3D ptw->out_virt; fi->stage2 =3D true; --=20 2.34.1