From nobody Wed Dec 31 10:40:14 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43413C4332F for ; Mon, 6 Nov 2023 07:16:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229892AbjKFHQB (ORCPT ); Mon, 6 Nov 2023 02:16:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230527AbjKFHOO (ORCPT ); Mon, 6 Nov 2023 02:14:14 -0500 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4311AD69 for ; Sun, 5 Nov 2023 23:14:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1699254851; x=1730790851; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=JXrcRndberQgWoGawVfq93WylWTuPjjrsB1zsCyDKUk=; b=Pdvq3G9oshsK/10S7GAfl+yak1B80KtayzriiEpXy+JD8IR8QmZarkj+ 1GooCPhIB0OoS04T0mB9PgJoaiPGjdxWCEoT714ujaABCR369/0Evj3Ot A6MnCHgwx0t3GrcK330ROjNsjD6c7fYeT6XIxmiz/1CrjRZARBWjWCC/F Mrmk/5YXn9vRQkQodY26VRH2ASWb085Jw5ywtk4u4mFouRIHK8XED0xkC Dt+Llx2haVlsbuGO4C1kRhn6iHg96ZfjGrNc8EjSupLwBZJE+ZgCSDE2C +jShQeNsmNGjCh/oAOKLYu4UIjZm22lBTFQFWAToT7oxcPkCyI+jVCdXH Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10885"; a="10759075" X-IronPort-AV: E=Sophos;i="6.03,280,1694761200"; d="scan'208";a="10759075" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Nov 2023 23:14:11 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10885"; a="1093690912" X-IronPort-AV: E=Sophos;i="6.03,280,1694761200"; d="scan'208";a="1093690912" Received: from sqa-gate.sh.intel.com (HELO localhost.localdomain) ([10.239.48.212]) by fmsmga005.fm.intel.com with ESMTP; 05 Nov 2023 23:14:07 -0800 From: Tina Zhang To: Jean-Philippe Brucker , Kevin Tian , Lu Baolu , joro@8bytes.org, will@kernel.org, Yi Liu Cc: virtualization@lists.linux-foundation.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Tina Zhang Subject: [RFC PATCH 5/5] iommu/virtio-iommu: Support attaching VT-d IO pgtable Date: Mon, 6 Nov 2023 02:12:26 -0500 Message-Id: <20231106071226.9656-6-tina.zhang@intel.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20231106071226.9656-1-tina.zhang@intel.com> References: <20231106071226.9656-1-tina.zhang@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add VT-d IO page table support to ATTACH_TABLE request. Signed-off-by: Tina Zhang --- drivers/iommu/virtio-iommu.c | 23 +++++++++++++++++++++++ include/uapi/linux/virtio_iommu.h | 26 ++++++++++++++++++++++++++ 2 files changed, 49 insertions(+) diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index b1ceaac974e2..b02eeb1d27a4 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -991,12 +991,25 @@ static int viommu_attach_pgtable(struct viommu_domain= *vdomain, }; =20 /* TODO: bypass flag? */ + if (vdomain->bypass =3D=3D true) + return 0; =20 switch (fmt) { case VIRT_IO_PGTABLE: req.format =3D cpu_to_le16(VIRTIO_IOMMU_FORMAT_PGTF_VIRT); req.pgd =3D cpu_to_le64((u64)cfg->virt.pgd); break; + case INTEL_IOMMU: { + struct virtio_iommu_req_attach_pgt_vtd *vtd_req =3D + (struct virtio_iommu_req_attach_pgt_vtd *)&req; + + vtd_req->format =3D cpu_to_le16(VIRTIO_IOMMU_FORMAT_PGTF_VTD); + vtd_req->pgd =3D cpu_to_le64((u64)cfg->virt.pgd); + vtd_req->addr_width =3D cpu_to_le32(cfg->oas); + vtd_req->pasid =3D IOMMU_NO_PASID; + break; + } + default: return -EINVAL; }; @@ -1034,6 +1047,16 @@ static int viommu_setup_pgtable(struct viommu_domain= *vdomain, case VIRTIO_IOMMU_FORMAT_PGTF_VIRT: fmt =3D VIRT_IO_PGTABLE; break; + case VIRTIO_IOMMU_FORMAT_PGTF_VTD: + { + struct virtio_iommu_probe_pgt_vtd *vtd_desc =3D + (struct virtio_iommu_probe_pgt_vtd *)desc; + + cfg.vtd_cfg.cap_reg =3D le64_to_cpu(vtd_desc->cap_reg); + cfg.vtd_cfg.ecap_reg =3D le64_to_cpu(vtd_desc->ecap_reg); + fmt =3D INTEL_IOMMU; + break; + } default: dev_warn(vdev->dev, "unsupported page table format 0x%x\n", le16_to_cpu(desc->format)); diff --git a/include/uapi/linux/virtio_iommu.h b/include/uapi/linux/virtio_= iommu.h index 656be1f3d926..17e0d5fcdd54 100644 --- a/include/uapi/linux/virtio_iommu.h +++ b/include/uapi/linux/virtio_iommu.h @@ -139,6 +139,22 @@ struct virtio_iommu_req_attach_pgt_virt { struct virtio_iommu_req_tail tail; }; =20 +/* Vt-d I/O Page Table Descriptor */ +struct virtio_iommu_req_attach_pgt_vtd { + struct virtio_iommu_req_head head; + __le32 domain; + __le32 endpoint; + __le32 flags; + __le16 format; + __u8 reserved[2]; + __le32 pasid; + __le64 pgd; + __le64 fl_flags; + __le32 addr_width; + __u8 reserved2[36]; + struct virtio_iommu_req_tail tail; +}; + #define VIRTIO_IOMMU_MAP_F_READ (1 << 0) #define VIRTIO_IOMMU_MAP_F_WRITE (1 << 1) #define VIRTIO_IOMMU_MAP_F_MMIO (1 << 2) @@ -224,6 +240,8 @@ struct virtio_iommu_probe_pasid_size { #define VIRTIO_IOMMU_FORMAT_PSTF_ARM_SMMU_V3 2 /* Virt I/O page table format */ #define VIRTIO_IOMMU_FORMAT_PGTF_VIRT 3 +/* VT-d I/O page table format */ +#define VIRTIO_IOMMU_FORMAT_PGTF_VTD 4 =20 struct virtio_iommu_probe_table_format { struct virtio_iommu_probe_property head; @@ -231,6 +249,14 @@ struct virtio_iommu_probe_table_format { __u8 reserved[2]; }; =20 +struct virtio_iommu_probe_pgt_vtd { + struct virtio_iommu_probe_property head; + __le16 format; + __u8 reserved[2]; + __le64 cap_reg; + __le64 ecap_reg; +}; + struct virtio_iommu_req_probe { struct virtio_iommu_req_head head; __le32 endpoint; --=20 2.39.3