From nobody Wed Nov 12 06:52:11 2025 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; dkim=fail header.i=@wdc.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=wdc.com ARC-Seal: i=1; a=rsa-sha256; t=1568763076; cv=none; d=zoho.com; s=zohoarc; b=i2lHiwJAIuJMoZ+9uozZ0P7/VHMQfP8s7SyXTGpe8CYiPbR209/18Zwvp0viEqvwe4zhsRVru43E97R/8O4dMGSw7JYSfg/dpYDELJZ9YbpaqRJFuGrrXk0D3yZc698m1+RsGBPLnqZcw5+NyOyNPEQLc5sZo66BD+jnna7aWJI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1568763076; 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=rNvYXKqOAayNVICkLc3Dsfs0coPNrNZF2svxykND7X8=; b=CtgNx+fzRI2PXEnUqfvLyk1ov0S0VVPUujxczA4mMdRhWE6xmNnuvWN7RqOs9kCPF5dD9HRAu/380CFWH3PbDDHxc9RzbsTZaaBJQ7fIwI4Y6cVuTjAyZtRbCZPohIng8xOsidyGEVFDZyfk/1UtmjsAiYnsrCNg6zYrq16bFrk= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=fail header.i=@wdc.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 1568763076236656.5751209696625; Tue, 17 Sep 2019 16:31:16 -0700 (PDT) Received: from localhost ([::1]:53456 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAMwE-0007BH-Ud for importer@patchew.org; Tue, 17 Sep 2019 19:31:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50796) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAMsL-0004D4-7c for qemu-devel@nongnu.org; Tue, 17 Sep 2019 19:27:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iAMsJ-0002eo-4e for qemu-devel@nongnu.org; Tue, 17 Sep 2019 19:27:12 -0400 Received: from esa1.hgst.iphmx.com ([68.232.141.245]:35346) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iAMsI-0002eD-S6; Tue, 17 Sep 2019 19:27:11 -0400 Received: from uls-op-cesaip02.wdc.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 18 Sep 2019 07:27:05 +0800 Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Sep 2019 16:23:41 -0700 Received: from risc6-mainframe.sdcorp.global.sandisk.com (HELO risc6-mainframe.int.fusionio.com) ([10.196.157.58]) by uls-op-cesaip01.wdc.com with ESMTP; 17 Sep 2019 16:27:05 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1568762830; x=1600298830; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=2aGksb+6wpuxxwZws3oCDFLqyYmlLrKjPA5jBwu9NTY=; b=Y9ZAc2WORRg+YpS00iCnYrCLOXUaZYszRigOv0t/30N/fwz3PSQXtkFa dAmCbQo7frp3ag16nX77JILrFdOJ4ysAbOmQmHuQ8LTvpJV4FTjuWoadH qkQPC0AFVip69w3dz8tmiWpmDRWWGqzLaZHSyAiF7yrs5/YG1gbfGUuxz rXS+L9GPNA2PK1+dwo0l0RFpByb/qgKaIITKYF3M7xHtQtDcNDhiYeWc7 HhnSLp7PjdLRUoZX8rEsWgU+2FVtLsSRo40NjFEoVZB0PHZoP9TSJZ8p8 oHOUhCIja8R/DJWjCgNu3C/F/rxfiQ4xZDZ0oHWoHj8SyEIz0CsYjNGse A==; IronPort-SDR: AI5nK1U84UGyIIDDEMf4RoB2X9DshPwcCtwhaI8eJNSuKCzsJekB5jOemkfb3MCVTcGW3JcBmx cHZhlnlYwK21sRO8EJ3FIr2FY4tCEEloQG/qdVZhG8mCi0hwS6mO4V3QuIcDi+wLDIrn/kbmep m1LZuTFuOlLEf0DapQj4vBAoSe2vaQBnI+MBkHQlKVGHHL5EI+5AwfzC8vS/k/iQYfsOyGBlNi S131maryacValclBeow1OaXiTZiigBQ5RIlGyKRkduvPqBleRfrkHGTO0RGy5Y1ibqr+DZHS+G ELk= X-IronPort-AV: E=Sophos;i="5.64,518,1559491200"; d="scan'208";a="225302172" IronPort-SDR: O5URhE8TvMq2t+Y4EKR9+nkGUtFsj6GOlGxNFWf//BFS9wfJXpgKWPs9j5QbOsYoLKeYeS/rfS G62onOETpyyX6L7VuiQTv+rg+OIzspTbcANxhKgnOLAuJWyxZJeb5Ds2W7dUQRqYqrD57Hqmgr vmr9n85TCCNqws8Jygem0/x/5W2wKTPRu20PN+SEvp1TpfpfHOXRFCwOeYoWS3hBigppRi2Lht BVZKKUnpWuznGsWbeARuu8FW6u7CCTByu6ArZOeX2Wfr0UZjEmeJVNBThUM0f2adaut732oUQ/ kO3mxM9orwE3Jo/hcskdyqa+ IronPort-SDR: IRhbjgdMNR7UFyaMIsQfrocbBMmGagBFmaNQTNdjhZeYmn4NQXClG+1RcUtGI1hI7XCN8jsq1C HMfHtvKiXvehGoT71hWbQiOlZrtPMIL0zbUN9YWfO51ZaD58KXQi9MoPh09usI2YbE87RJuR7p T1AeS/YuMYY9YxsEHg0nHXbIRxAErX5NZr5nJMCpVNQlvg1DA/PBbZApFecEjtOGogjNVACiI4 6MO7XW08XC2hB+jew/ACUOv4tF8yOT4H0yKaFHdKu3BduKHqRRuqKhsDfr8GtX1y8iiYNZDeNB reQ= WDCIronportException: Internal From: Alistair Francis To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Date: Tue, 17 Sep 2019 16:22:59 -0700 Message-Id: X-Mailer: git-send-email 2.23.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: FreeBSD 9.x X-Received-From: 68.232.141.245 Subject: [Qemu-devel] [PATCH v1 1/2] RISC-V: Handle bus errors in the page table walker 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@linaro.org, palmer@sifive.com, alistair.francis@wdc.com, alistair23@gmail.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Palmer Dabbelt We directly access physical memory while walking the page tables on RISC-V, but while doing so we were using cpu_ld*() which does not report bus errors. This patch converts the page table walker over to use address_space_ld*(), which allows bus errors to be detected. Signed-off-by: Palmer Dabbelt Signed-off-by: Alistair Francis Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- target/riscv/cpu_helper.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index 87dd6a6ece..c82e7ed52b 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -169,7 +169,8 @@ static int get_physical_address(CPURISCVState *env, hwa= ddr *physical, /* NOTE: the env->pc value visible here will not be * correct, but the value visible to the exception handler * (riscv_cpu_do_interrupt) is correct */ - + MemTxResult res; + MemTxAttrs attrs =3D MEMTXATTRS_UNSPECIFIED; int mode =3D mmu_idx; =20 if (mode =3D=3D PRV_M && access_type !=3D MMU_INST_FETCH) { @@ -256,11 +257,16 @@ restart: 1 << MMU_DATA_LOAD, PRV_S)) { return TRANSLATE_PMP_FAIL; } + #if defined(TARGET_RISCV32) - target_ulong pte =3D ldl_phys(cs->as, pte_addr); + target_ulong pte =3D address_space_ldl(cs->as, pte_addr, attrs, &r= es); #elif defined(TARGET_RISCV64) - target_ulong pte =3D ldq_phys(cs->as, pte_addr); + target_ulong pte =3D address_space_ldq(cs->as, pte_addr, attrs, &r= es); #endif + if (res !=3D MEMTX_OK) { + return TRANSLATE_FAIL; + } + hwaddr ppn =3D pte >> PTE_PPN_SHIFT; =20 if (!(pte & PTE_V)) { --=20 2.23.0