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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 94D72C3F68F for ; Wed, 11 Dec 2019 02:13:29 +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 718A82465B for ; Wed, 11 Dec 2019 02:13:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 718A82465B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.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 393F987D48; Wed, 11 Dec 2019 02:13:29 +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 Vsqe03J7mdOL; Wed, 11 Dec 2019 02:13:27 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id BBC2187CB8; Wed, 11 Dec 2019 02:13:27 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id AA6DFC1796; Wed, 11 Dec 2019 02:13:27 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id D0A17C0881 for ; Wed, 11 Dec 2019 02:13:25 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id C021186C2C for ; Wed, 11 Dec 2019 02:13:25 +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 DYduo-9tJ-QX for ; Wed, 11 Dec 2019 02:13:25 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by fraxinus.osuosl.org (Postfix) with ESMTPS id 436F985F0F for ; Wed, 11 Dec 2019 02:13:25 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 Dec 2019 18:13:25 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,301,1571727600"; d="scan'208";a="225353013" Received: from allen-box.sh.intel.com ([10.239.159.136]) by orsmga002.jf.intel.com with ESMTP; 10 Dec 2019 18:13:22 -0800 From: Lu Baolu To: Joerg Roedel , David Woodhouse , Alex Williamson Subject: [PATCH v3 3/6] iommu/vt-d: Add PASID_FLAG_FL5LP for first-level pasid setup Date: Wed, 11 Dec 2019 10:12:16 +0800 Message-Id: <20191211021219.8997-4-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191211021219.8997-1-baolu.lu@linux.intel.com> References: <20191211021219.8997-1-baolu.lu@linux.intel.com> Cc: kevin.tian@intel.com, ashok.raj@intel.com, kvm@vger.kernel.org, sanjay.k.kumar@intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, yi.y.sun@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" Current intel_pasid_setup_first_level() use 5-level paging for first level translation if CPUs use 5-level paging mode too. This makes sense for SVA usages since the page table is shared between CPUs and IOMMUs. But it makes no sense if we only want to use first level for IOVA translation. Add PASID_FLAG_FL5LP bit in the flags which indicates whether the 5-level paging mode should be used. Signed-off-by: Lu Baolu --- drivers/iommu/intel-pasid.c | 7 ++----- drivers/iommu/intel-pasid.h | 6 ++++++ drivers/iommu/intel-svm.c | 8 ++++++-- 3 files changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/iommu/intel-pasid.c b/drivers/iommu/intel-pasid.c index 3cb569e76642..22b30f10b396 100644 --- a/drivers/iommu/intel-pasid.c +++ b/drivers/iommu/intel-pasid.c @@ -477,18 +477,15 @@ int intel_pasid_setup_first_level(struct intel_iommu *iommu, pasid_set_sre(pte); } -#ifdef CONFIG_X86 - /* Both CPU and IOMMU paging mode need to match */ - if (cpu_feature_enabled(X86_FEATURE_LA57)) { + if (flags & PASID_FLAG_FL5LP) { if (cap_5lp_support(iommu->cap)) { pasid_set_flpm(pte, 1); } else { - pr_err("VT-d has no 5-level paging support for CPU\n"); + pr_err("No 5-level paging support for first-level\n"); pasid_clear_entry(pte); return -EINVAL; } } -#endif /* CONFIG_X86 */ pasid_set_domain_id(pte, did); pasid_set_address_width(pte, iommu->agaw); diff --git a/drivers/iommu/intel-pasid.h b/drivers/iommu/intel-pasid.h index fc8cd8f17de1..92de6df24ccb 100644 --- a/drivers/iommu/intel-pasid.h +++ b/drivers/iommu/intel-pasid.h @@ -37,6 +37,12 @@ */ #define PASID_FLAG_SUPERVISOR_MODE BIT(0) +/* + * The PASID_FLAG_FL5LP flag Indicates using 5-level paging for first- + * level translation, otherwise, 4-level paging will be used. + */ +#define PASID_FLAG_FL5LP BIT(1) + struct pasid_dir_entry { u64 val; }; diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index 04023033b79f..d7f2a5358900 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -364,7 +364,9 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ ret = intel_pasid_setup_first_level(iommu, dev, mm ? mm->pgd : init_mm.pgd, svm->pasid, FLPT_DEFAULT_DID, - mm ? 0 : PASID_FLAG_SUPERVISOR_MODE); + (mm ? 0 : PASID_FLAG_SUPERVISOR_MODE) | + (cpu_feature_enabled(X86_FEATURE_LA57) ? + PASID_FLAG_FL5LP : 0)); spin_unlock(&iommu->lock); if (ret) { if (mm) @@ -385,7 +387,9 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ ret = intel_pasid_setup_first_level(iommu, dev, mm ? mm->pgd : init_mm.pgd, svm->pasid, FLPT_DEFAULT_DID, - mm ? 0 : PASID_FLAG_SUPERVISOR_MODE); + (mm ? 0 : PASID_FLAG_SUPERVISOR_MODE) | + (cpu_feature_enabled(X86_FEATURE_LA57) ? + PASID_FLAG_FL5LP : 0)); spin_unlock(&iommu->lock); if (ret) { kfree(sdev); -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu