From nobody Tue Feb 10 18:44:31 2026 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1621509138; cv=none; d=zohomail.com; s=zohoarc; b=IsLrWe3oZ6JjpPO7kGpXvXbujaI3wKWJCB7/H4b9k02gUwIB872S1uob/smxtYsthrxZ2QrD979jNm8uwhELYwAsZyvxzvdu6+vHJV4iBndQd3Nwl1FI24QAm6JK1g2rFyG0yRlMrpcHeDyujYMS4KSg+Bo6hNINoOHEMrrRRvE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1621509138; h=Content-Type: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; bh=BIUKBelUrGAg7JFPfqNH9aSjg1FuXfUME+/SSVTybmA=; b=THf+AdzoEyIDSCDlkyJVxHBUmYnWM8W84JYCV7SDXOLXWjuCBGYYsH8DDbbjaLkVOX8Wx+yrXNpYooLc7MUVniMPYdCTCoLHC1gwtZOIfaRq6VBNJ7sJk4ptmeQJ10O7k0XWunjWs114oF0n1YMXeafL4prdk92M0dt2o75uf8s= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=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 1621509138359431.63263940919546; Thu, 20 May 2021 04:12:18 -0700 (PDT) Received: from localhost ([::1]:38444 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ljgbB-0002IB-6s for importer2@patchew.org; Thu, 20 May 2021 07:12:17 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44516) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ljgYd-0007xx-MT for qemu-devel@nongnu.org; Thu, 20 May 2021 07:09:39 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:35781) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ljgYb-0004T8-Uz for qemu-devel@nongnu.org; Thu, 20 May 2021 07:09:39 -0400 Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-60-g_FFBUT2Pa-3SQk7IAGPzg-1; Thu, 20 May 2021 07:09:36 -0400 Received: by mail-wr1-f71.google.com with SMTP id q15-20020adfc50f0000b0290111f48b865cso5029323wrf.4 for ; Thu, 20 May 2021 04:09:36 -0700 (PDT) Received: from x1w.redhat.com (31.red-83-51-215.dynamicip.rima-tde.net. [83.51.215.31]) by smtp.gmail.com with ESMTPSA id c6sm2750046wru.50.2021.05.20.04.09.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 May 2021 04:09:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1621508977; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BIUKBelUrGAg7JFPfqNH9aSjg1FuXfUME+/SSVTybmA=; b=Ads1KW9jf9UgrIJmirUn3zN7HPJfZ5ueJX7QxY6xv6GAxf4+6ZUCM+On44IQMEJsteOeco TplGyI/JF8kn8EFRxlGQfSnAIowyYSHsrfLSV+7ZDUYaPGF7WgZfx9dV7bZ9VgkcxWwwr1 HVhd1CP/v6Lt/kXk2rQH7c5q1SwAlUE= X-MC-Unique: g_FFBUT2Pa-3SQk7IAGPzg-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=BIUKBelUrGAg7JFPfqNH9aSjg1FuXfUME+/SSVTybmA=; b=AmxfUdEDpbguboRsqF+jDJMavSSNJRCp2AGTmoch+UPq9h0C/zM4WYxzTQ0vrbkhOi wsW3VxV/jHAB0zQsYJ6H+ff8trA8/WyZv1hXSD8APXcWW2DOrTa9NzOrSXtiaUY2ycph /Q0GFaOmw2pqqim/hu/oDW/uICEK3RgqdBuQHDAI/MuRuhNh+KIxMl6tF4zlW0GaNEgy ML1ZzdEiyRmfv/sOgy2bU3vYNFde1UQW0c45OycSdvaUIq1DKbAZrL+NSJlXl9D0VmNw dKvBJwEOz5GKXo+cBDsjVOBuk/dOeE94tqSag87IYQt1SoZGWoKXU1JKUK23df5kX2Wc o4Ig== X-Gm-Message-State: AOAM532HUL7y6pfX5NgVQeNBHwGMi0Fun04/Zzbvh3h08o4dkesss4gB CJfyhnoDpmdlGqYUl1Y9YBwSINtqfCXpCJmPOE+MEQIlgkj3qmCvHgb4BpjIMEaY2eqsx2y0+78 pk0GM/Tn2iP1u9SjFPdQ6JiXXTBuQ0V9N6l5l2ZJqY+HJYwYsqp5ZFuMh4+aRFKHq X-Received: by 2002:a5d:62c7:: with SMTP id o7mr3673020wrv.372.1621508974757; Thu, 20 May 2021 04:09:34 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwEUAwnlIZe3JtCq7uoFHBWXQoJs3UxNmzzOa9mrg8Z+HtdwTbQUbXUK7S5h4KZbQr5i0Yq5A== X-Received: by 2002:a5d:62c7:: with SMTP id o7mr3672987wrv.372.1621508974526; Thu, 20 May 2021 04:09:34 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [RFC PATCH 03/12] exec/memory_ldst: Return MEMTX_UNALIGNED_ERROR for unaligned addresses Date: Thu, 20 May 2021 13:09:10 +0200 Message-Id: <20210520110919.2483190-4-philmd@redhat.com> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20210520110919.2483190-1-philmd@redhat.com> References: <20210520110919.2483190-1-philmd@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" 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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.39, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , "Michael S. Tsirkin" , Richard Henderson , Peter Xu , Bibo Mao , Stefan Hajnoczi , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) All address_space internal handlers have the /* warning: addr must be aligned */ comment, so we don't expect any caller to pass unaligned addresses. Now than we added the MemTxAttrs.aligned attribute, callers might want to pass unaligned addresses. In case they do, be ready and return MEMTX_UNALIGNED_ERROR. Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- memory_ldst.c.inc | 49 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/memory_ldst.c.inc b/memory_ldst.c.inc index 84b868f2946..efeb545479e 100644 --- a/memory_ldst.c.inc +++ b/memory_ldst.c.inc @@ -32,6 +32,13 @@ static inline uint32_t glue(address_space_ldl_internal, = SUFFIX)(ARG1_DECL, MemTxResult r; bool release_lock =3D false; =20 + if (unlikely(!QEMU_IS_ALIGNED(addr, sizeof(uint32_t)))) { + if (result) { + *result =3D MEMTX_UNALIGNED_ERROR; + } + return (uint32_t)-1; /* XXX */ + } + RCU_READ_LOCK(); mr =3D TRANSLATE(addr, &addr1, &l, false, attrs); if (l < 4 || !memory_access_is_direct(mr, false)) { @@ -101,6 +108,13 @@ static inline uint64_t glue(address_space_ldq_internal= , SUFFIX)(ARG1_DECL, MemTxResult r; bool release_lock =3D false; =20 + if (unlikely(!QEMU_IS_ALIGNED(addr, sizeof(uint64_t)))) { + if (result) { + *result =3D MEMTX_UNALIGNED_ERROR; + } + return (uint64_t)-1; /* XXX */ + } + RCU_READ_LOCK(); mr =3D TRANSLATE(addr, &addr1, &l, false, attrs); if (l < 8 || !memory_access_is_direct(mr, false)) { @@ -205,6 +219,13 @@ static inline uint16_t glue(address_space_lduw_interna= l, SUFFIX)(ARG1_DECL, MemTxResult r; bool release_lock =3D false; =20 + if (unlikely(!QEMU_IS_ALIGNED(addr, sizeof(uint16_t)))) { + if (result) { + *result =3D MEMTX_UNALIGNED_ERROR; + } + return (uint16_t)-1; /* XXX */ + } + RCU_READ_LOCK(); mr =3D TRANSLATE(addr, &addr1, &l, false, attrs); if (l < 2 || !memory_access_is_direct(mr, false)) { @@ -275,6 +296,13 @@ void glue(address_space_stl_notdirty, SUFFIX)(ARG1_DEC= L, uint8_t dirty_log_mask; bool release_lock =3D false; =20 + if (unlikely(!QEMU_IS_ALIGNED(addr, sizeof(uint32_t)))) { + if (result) { + *result =3D MEMTX_UNALIGNED_ERROR; + } + return; + } + RCU_READ_LOCK(); mr =3D TRANSLATE(addr, &addr1, &l, true, attrs); if (l < 4 || !memory_access_is_direct(mr, true)) { @@ -312,6 +340,13 @@ static inline void glue(address_space_stl_internal, SU= FFIX)(ARG1_DECL, MemTxResult r; bool release_lock =3D false; =20 + if (unlikely(!QEMU_IS_ALIGNED(addr, sizeof(uint32_t)))) { + if (result) { + *result =3D MEMTX_UNALIGNED_ERROR; + } + return; + } + RCU_READ_LOCK(); mr =3D TRANSLATE(addr, &addr1, &l, true, attrs); if (l < 4 || !memory_access_is_direct(mr, true)) { @@ -408,6 +443,13 @@ static inline void glue(address_space_stw_internal, SU= FFIX)(ARG1_DECL, MemTxResult r; bool release_lock =3D false; =20 + if (unlikely(!QEMU_IS_ALIGNED(addr, sizeof(uint16_t)))) { + if (result) { + *result =3D MEMTX_UNALIGNED_ERROR; + } + return; + } + RCU_READ_LOCK(); mr =3D TRANSLATE(addr, &addr1, &l, true, attrs); if (l < 2 || !memory_access_is_direct(mr, true)) { @@ -472,6 +514,13 @@ static void glue(address_space_stq_internal, SUFFIX)(A= RG1_DECL, MemTxResult r; bool release_lock =3D false; =20 + if (unlikely(!QEMU_IS_ALIGNED(addr, sizeof(uint64_t)))) { + if (result) { + *result =3D MEMTX_UNALIGNED_ERROR; + } + return; + } + RCU_READ_LOCK(); mr =3D TRANSLATE(addr, &addr1, &l, true, attrs); if (l < 8 || !memory_access_is_direct(mr, true)) { --=20 2.26.3