From nobody Tue Feb 10 06:57:27 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; 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=1559945490; cv=none; d=zoho.com; s=zohoarc; b=iopoY74IfioApo687DoZs1+35UxTnow+E4DcpoD3BxD1TAjUK4Zm3mCJXWLxMHjukvjuCuyIOiGjvSwoF6LhYpEhhW+Pjs/b8gRQKS7aZluoR5FHuxKj6wL2hq+FAm6RD7yfg10ulU32xoUtl6U/vrEn83nRy5KypSaB5Evrufk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1559945490; 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=ED1w95pgjNK2JeM3Cb0i2g8zZ7CNt+xRRXBFWZ3k2hA=; b=Rb6IXMe/hfGdEtvs+7Ld99yZpxd3LfnOEj+m3eZqTexwVZmiXtMpVw7OEzObv8ifVCTquvGJmKvcErKFpbe/VyIK72WHxsUkiSjy/yuIeMJjs4cW9FMpydBhVDfR+vXv+p7EcqCAF3Jq9M1yR+C1aesUc9Facq+kC2Xgb1ZnweE= 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 1559945490795778.5914991952548; Fri, 7 Jun 2019 15:11:30 -0700 (PDT) Received: from localhost ([::1]:53664 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hZN55-0006ou-Ow for importer@patchew.org; Fri, 07 Jun 2019 18:11:27 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48067) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hZMsb-0004q6-34 for qemu-devel@nongnu.org; Fri, 07 Jun 2019 17:58:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hZMsX-0002FR-R2 for qemu-devel@nongnu.org; Fri, 07 Jun 2019 17:58:31 -0400 Received: from esa2.hgst.iphmx.com ([68.232.143.124]:38196) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hZMsX-0002BV-JJ; Fri, 07 Jun 2019 17:58:29 -0400 Received: from h199-255-45-14.hgst.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 08 Jun 2019 05:58:39 +0800 Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep01.wdc.com with ESMTP; 07 Jun 2019 14:33:20 -0700 Received: from risc6-mainframe.sdcorp.global.sandisk.com (HELO risc6-mainframe.int.fusionio.com) ([10.196.157.140]) by uls-op-cesaip01.wdc.com with ESMTP; 07 Jun 2019 14:58:27 -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=1559944722; x=1591480722; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=qDL5/qlAQFtYrCOkIfH5+w4MhTN/n5JyM640ZKPXzXk=; b=ialvrKUrqeTDm4Ggw2w99bFRH8kkwVg38EEjoPH0ehSANDS+VFIgK2wl trvtcYlsKMAHAhLEfxsVSGbZUJT7P6l8dwDeFLMUuaB8T6q3xu4ZEF7Pk 2bLWIMBEQHCNBhp8UVaJwxmaXC2y2L3qVvN0RsED1IFjvVhsqsnOkIhnS 0BqNPP9xTyhNY7j4MJy3Xg3V/b2mlltEQETPXpXj7oXJE2NMiBfe03tLG l/WTO8KxIeuU7bGmlmUpL1AWMr0NVZQeFjD8w2q2QUjBpUsTh7Wf6fXL/ 5S/Epajo3y2/3XpzNgDSg0yHyN3jwCuhnIoaa12vi77PByBRiCJHxT9rG Q==; X-IronPort-AV: E=Sophos;i="5.63,564,1557158400"; d="scan'208";a="209711287" IronPort-SDR: YkToNWuf3EZposF6k3G0YtA9V1QG3lJp6oEkAusnG8cxPwYIPnlIJRsFcrnBRHW/PgxJQJ3mG6 9hd+ATvxgVa1E3wowpLc+ysQhCUCDxymd39Yflhdp72lG1MmoYbf/5y+AyRDauio+4Hgat8yM+ uu59vdeoN5JYq7XjF+s9rQn+EgC6tr6nzORndtVYw1qDISEqcqzVhKWxr+8LtJXx7gtjqnHSvP pz4wKNzIXh0FfS/wErbLkGXU3yF8diEYLaxIPEMgriPbd2ouArddZY4dASuD94bHdZK7qFnAtw S1d/h6/kxsVqAJaYv95D2muW IronPort-SDR: K6XOMUP0nviRisQvhWO47CCKfxLr2N4UJ27pfjSsnEEHkF3higmkMISk8mttftnNNUOTJdp/S1 x8zIcmL4UGlqv81gEcAc2BStSxrcQRamudfBfLiI1W+ThbHTySp/Uk1OYSZ3lDy9soYN0WK1b6 AALVnESe/aqa6F8YcJh/5AxUUujcG+72k4w7LR9P/X5Gmm/H+a5MJNaYFu98u96W8puMRXUXYs 0qlD0wJi5UKtwHXESIFN995H+uy0vHaggYonjZ6RhajpBi64QHqeKyJpBg76t5/OTeoay2iPu/ VZw= From: Alistair Francis To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Date: Fri, 7 Jun 2019 14:56:17 -0700 Message-Id: <38a35baa3815eefd2e7a626aaa72f7d5f680e5e2.1559944445.git.alistair.francis@wdc.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 68.232.143.124 Subject: [Qemu-devel] [PATCH v1 18/27] target/riscv: Add Hypervisor trap return support 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: alistair23@gmail.com, palmer@sifive.com, alistair.francis@wdc.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" Signed-off-by: Alistair Francis --- target/riscv/op_helper.c | 66 ++++++++++++++++++++++++++++++++-------- 1 file changed, 54 insertions(+), 12 deletions(-) diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c index e08bb8dd5a..60dcd73fc7 100644 --- a/target/riscv/op_helper.c +++ b/target/riscv/op_helper.c @@ -73,6 +73,8 @@ target_ulong helper_csrrc(CPURISCVState *env, target_ulon= g src, =20 target_ulong helper_sret(CPURISCVState *env, target_ulong cpu_pc_deb) { + target_ulong prev_priv, prev_virt, mstatus; + if (!(env->priv >=3D PRV_S)) { riscv_raise_exception(env, RISCV_EXCP_ILLEGAL_INST, GETPC()); } @@ -87,16 +89,46 @@ target_ulong helper_sret(CPURISCVState *env, target_ulo= ng cpu_pc_deb) riscv_raise_exception(env, RISCV_EXCP_ILLEGAL_INST, GETPC()); } =20 - target_ulong mstatus =3D env->mstatus; - target_ulong prev_priv =3D get_field(mstatus, MSTATUS_SPP); - mstatus =3D set_field(mstatus, - env->priv_ver >=3D PRIV_VERSION_1_10_0 ? - MSTATUS_SIE : MSTATUS_UIE << prev_priv, - get_field(mstatus, MSTATUS_SPIE)); - mstatus =3D set_field(mstatus, MSTATUS_SPIE, 0); - mstatus =3D set_field(mstatus, MSTATUS_SPP, PRV_U); + mstatus =3D env->mstatus; + + if (riscv_has_ext(env, RVH) && !riscv_cpu_virt_enabled(env)) { + /* We support Hypervisor extensions and virtulisation is disabled = */ + target_ulong hstatus =3D env->hstatus; + + prev_priv =3D get_field(mstatus, MSTATUS_SPP); + prev_virt =3D get_field(hstatus, HSTATUS_SPV); + + hstatus =3D set_field(hstatus, HSTATUS_SPV, + get_field(hstatus, HSTATUS_SP2V)); + mstatus =3D set_field(mstatus, MSTATUS_SPP, + get_field(hstatus, HSTATUS_SP2P)); + hstatus =3D set_field(hstatus, HSTATUS_SP2V, 0); + hstatus =3D set_field(hstatus, HSTATUS_SP2P, 0); + mstatus =3D set_field(mstatus, SSTATUS_SIE, + get_field(mstatus, SSTATUS_SPIE)); + mstatus =3D set_field(mstatus, SSTATUS_SPIE, 1); + + env->mstatus =3D mstatus; + env->hstatus =3D hstatus; + + if (prev_virt =3D=3D VIRT_ON) { + riscv_cpu_swap_background_regs(env); + } + + riscv_cpu_set_virt_enabled(env, prev_virt); + } else { + prev_priv =3D get_field(mstatus, MSTATUS_SPP); + + mstatus =3D set_field(mstatus, + env->priv_ver >=3D PRIV_VERSION_1_10_0 ? + MSTATUS_SIE : MSTATUS_UIE << prev_priv, + get_field(mstatus, MSTATUS_SPIE)); + mstatus =3D set_field(mstatus, MSTATUS_SPIE, 0); + mstatus =3D set_field(mstatus, MSTATUS_SPP, PRV_U); + env->mstatus =3D mstatus; + } + riscv_cpu_set_mode(env, prev_priv); - env->mstatus =3D mstatus; =20 return retpc; } @@ -114,14 +146,24 @@ target_ulong helper_mret(CPURISCVState *env, target_u= long cpu_pc_deb) =20 target_ulong mstatus =3D env->mstatus; target_ulong prev_priv =3D get_field(mstatus, MSTATUS_MPP); + target_ulong prev_virt =3D get_field(mstatus, MSTATUS_MPV); mstatus =3D set_field(mstatus, env->priv_ver >=3D PRIV_VERSION_1_10_0 ? MSTATUS_MIE : MSTATUS_UIE << prev_priv, get_field(mstatus, MSTATUS_MPIE)); - mstatus =3D set_field(mstatus, MSTATUS_MPIE, 0); - mstatus =3D set_field(mstatus, MSTATUS_MPP, PRV_U); - riscv_cpu_set_mode(env, prev_priv); + mstatus =3D set_field(mstatus, MSTATUS_MPIE, 1); + mstatus =3D set_field(mstatus, MSTATUS_MPP, 0); + mstatus =3D set_field(mstatus, MSTATUS_MPV, 0); env->mstatus =3D mstatus; + riscv_cpu_set_mode(env, prev_priv); + + if (riscv_has_ext(env, RVH)) { + if (prev_virt =3D=3D VIRT_ON) { + riscv_cpu_swap_background_regs(env); + } + + riscv_cpu_set_virt_enabled(env, prev_virt); + } =20 return retpc; } --=20 2.21.0