From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7DA23C433E1 for ; Thu, 11 Jun 2020 12:09:54 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5D0CF207C3 for ; Thu, 11 Jun 2020 12:09:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5D0CF207C3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 3ECE08878E; Thu, 11 Jun 2020 12:09:54 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TYhnnEZzL60Y; Thu, 11 Jun 2020 12:09:50 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 92D8788793; Thu, 11 Jun 2020 12:09:46 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 708D2C0894; Thu, 11 Jun 2020 12:09:46 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 77F60C0895 for ; Thu, 11 Jun 2020 12:09:44 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 57FE787A87 for ; Thu, 11 Jun 2020 12:09:44 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id N3CBz-sRD16i for ; Thu, 11 Jun 2020 12:09:10 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by fraxinus.osuosl.org (Postfix) with ESMTPS id 72DDF87A2B for ; Thu, 11 Jun 2020 12:09:10 +0000 (UTC) IronPort-SDR: Gb6tnIu3W3+irO5ikTVctqkf2+1XiGWrcpKN86/IBzCkvemRC8TlntyKTAIOej4M263eNuOwP8 LKhhsOYc9VqA== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jun 2020 05:09:09 -0700 IronPort-SDR: UgngBC5o0rztw2qcTzpAkEo04MkcEm9MfxLvB1ItguxfQYidjlTVJ30U8VwqYTd+GpEhpnPiDn Oqm8wYJSqdSg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,499,1583222400"; d="scan'208";a="419082469" Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga004.jf.intel.com with ESMTP; 11 Jun 2020 05:09:09 -0700 From: Liu Yi L To: alex.williamson@redhat.com, eric.auger@redhat.com, baolu.lu@linux.intel.com, joro@8bytes.org Subject: [PATCH v2 02/15] iommu: Report domain nesting info Date: Thu, 11 Jun 2020 05:15:21 -0700 Message-Id: <1591877734-66527-3-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1591877734-66527-1-git-send-email-yi.l.liu@intel.com> References: <1591877734-66527-1-git-send-email-yi.l.liu@intel.com> Cc: jean-philippe@linaro.org, kevin.tian@intel.com, ashok.raj@intel.com, kvm@vger.kernel.org, jun.j.tian@intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, yi.y.sun@intel.com, hao.wu@intel.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" IOMMUs that support nesting translation needs report the capability info to userspace, e.g. the format of first level/stage paging structures. Cc: Kevin Tian CC: Jacob Pan Cc: Alex Williamson Cc: Eric Auger Cc: Jean-Philippe Brucker Cc: Joerg Roedel Cc: Lu Baolu Signed-off-by: Liu Yi L Signed-off-by: Jacob Pan --- @Jean, Eric: as nesting was introduced for ARM, but looks like no actual user of it. right? So I'm wondering if we can reuse DOMAIN_ATTR_NESTING to retrieve nesting info? how about your opinions? include/linux/iommu.h | 1 + include/uapi/linux/iommu.h | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 78a26ae..f6e4b49 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -126,6 +126,7 @@ enum iommu_attr { DOMAIN_ATTR_FSL_PAMUV1, DOMAIN_ATTR_NESTING, /* two stages of translation */ DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE, + DOMAIN_ATTR_NESTING_INFO, DOMAIN_ATTR_MAX, }; diff --git a/include/uapi/linux/iommu.h b/include/uapi/linux/iommu.h index 303f148..02eac73 100644 --- a/include/uapi/linux/iommu.h +++ b/include/uapi/linux/iommu.h @@ -332,4 +332,38 @@ struct iommu_gpasid_bind_data { }; }; +struct iommu_nesting_info { + __u32 size; + __u32 format; + __u32 features; +#define IOMMU_NESTING_FEAT_SYSWIDE_PASID (1 << 0) +#define IOMMU_NESTING_FEAT_BIND_PGTBL (1 << 1) +#define IOMMU_NESTING_FEAT_CACHE_INVLD (1 << 2) + __u32 flags; + __u8 data[]; +}; + +/* + * @flags: VT-d specific flags. Currently reserved for future + * extension. + * @addr_width: The output addr width of first level/stage translation + * @pasid_bits: Maximum supported PASID bits, 0 represents no PASID + * support. + * @cap_reg: Describe basic capabilities as defined in VT-d capability + * register. + * @cap_mask: Mark valid capability bits in @cap_reg. + * @ecap_reg: Describe the extended capabilities as defined in VT-d + * extended capability register. + * @ecap_mask: Mark the valid capability bits in @ecap_reg. + */ +struct iommu_nesting_info_vtd { + __u32 flags; + __u16 addr_width; + __u16 pasid_bits; + __u64 cap_reg; + __u64 cap_mask; + __u64 ecap_reg; + __u64 ecap_mask; +}; + #endif /* _UAPI_IOMMU_H */ -- 2.7.4 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu