From nobody Wed Feb 11 02:53:56 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=1691417773; cv=none; d=zohomail.com; s=zohoarc; b=QE8grZt13UbKcZmh8/4GOl4fTxl+GmwE/vXf5JJSvwhCsfAxruEV7AggsaEZc5HK1dtjntP9SYun+JzHDJ6hAkYDm2f5DST5YHi/0V8VmNerU0I+GCx8Qpt5Ys5rn8T/YWtw2Lmk3lRzqTV1jI8GPiJ0CLMth3lFQwz+prHztaM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1691417773; 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=mTF0rpR5T9/+RGJwHtQl5zTiqKLJXEt3Fbl4hFG5dDw=; b=kq64QD9q3iIltOOhr3a1NtojdcM+93CqoDWwGGSH6VgDysBUIwJF4CQ3Nk7BkTH+pSol0Fp0bSwKrIZra+P/DbkAUFar8qJbTKisOKfxw1enB7JuMiog1QAOxwtwSZF2Xlwmn2ea5FTjNacBaHJL5ddUoU3eOF/W3QvFZjeGMZw= 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 1691417773012748.9969732783326; Mon, 7 Aug 2023 07:16:13 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qT11U-0000FF-75; Mon, 07 Aug 2023 10:15:53 -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 1qT10z-00007g-Ub for qemu-devel@nongnu.org; Mon, 07 Aug 2023 10:15:21 -0400 Received: from mail-wm1-x32e.google.com ([2a00:1450:4864:20::32e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qT10x-0005RU-2j for qemu-devel@nongnu.org; Mon, 07 Aug 2023 10:15:21 -0400 Received: by mail-wm1-x32e.google.com with SMTP id 5b1f17b1804b1-3fe4b95c371so16784395e9.1 for ; Mon, 07 Aug 2023 07:15:18 -0700 (PDT) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id h20-20020a05600c261400b003fe2ebf479fsm10835617wma.36.2023.08.07.07.15.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 07:15:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1691417717; x=1692022517; 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=mTF0rpR5T9/+RGJwHtQl5zTiqKLJXEt3Fbl4hFG5dDw=; b=Kmnnw5f6J1PD5PC8Gkwbux13uGZIYn7v57Sy74U+sqM17YqR+Hs6bjf1diPoqv5QaR HZpN08etf2GPFvfCgJ1banmEscT/8QPya9FCSUee4xlt3GNdXtjP6VU6zRzabRDWTWUL rm8wa/JTA8IWd+IYBSQQE9yURgXWzQfJn/0X7t5D0lu7fBr0kDO9EAT04spiaAAOcxJb NQKPy/CdXZfGmVZtwB3sxe7EvI6FQAUUVGkxOMGEFy58Sv0rK1xgV4qJdHkFWLaXDFKZ PFABke3Yne31pkA8RSM9TVvvAjn0OGJShU2OFDC72AQ1+Dd2CZ820GHofWD5JsS3b3qk ONWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691417717; x=1692022517; 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=mTF0rpR5T9/+RGJwHtQl5zTiqKLJXEt3Fbl4hFG5dDw=; b=VxapGYaabmvHsdIOfIGbWKgMJVK25MwWnpqKKKFNP7iDlqvHCDqXevtNRDvsZXnO3d NpeUcF3F9FtAWTpTrnzdTiphQXv2pW3rsnfSzbic/khXxwLGMj3AKKQCpQBt0mQ1YzSi jqO7EkGn3hRdxtDO38rPysIr24WMNfxpBUt281qhuVLMtiB/AQ+IbeS+CO51dbeCvzjN Hr5u9mW6lQz6c69zrfU7dielkJaatLTKFdo1EeGXfzRONVIVb5jaX1yUes2nG5PpB5yh 5UolADB0zwNRhrHnG0XkjONIyZxmgTACKPi+/+lR8wrLssFjZ8yLZLkvvXcRVSM78qi3 vpeQ== X-Gm-Message-State: AOJu0YzMzoGPI0ZkchbJcZ7oGvjY5SV5Z6IM/x3xAds9qrVhfPSMf+4H gJ7B1PlYtb2trfft6WXH7bJPBqZa7+FL3vckPyw= X-Google-Smtp-Source: AGHT+IHDhP6kL82ZAaEDUbCRhyDeVxyDJ0XZQykVAh6jWOo+S1ZbI5g/dauN+zjh/Aei01UZwUhDzA== X-Received: by 2002:a05:600c:1d05:b0:3fb:e1d0:6417 with SMTP id l5-20020a05600c1d0500b003fbe1d06417mr5437826wms.19.1691417717623; Mon, 07 Aug 2023 07:15:17 -0700 (PDT) From: Peter Maydell To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH v2 02/15] target/arm/ptw: Don't report GPC faults on stage 1 ptw as stage2 faults Date: Mon, 7 Aug 2023 15:15:01 +0100 Message-Id: <20230807141514.19075-3-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230807141514.19075-1-peter.maydell@linaro.org> References: <20230807141514.19075-1-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::32e; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x32e.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 autolearn=ham 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: 1691417822754100001 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