From patchwork Mon Sep 23 12:24:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baolu Lu X-Patchwork-Id: 11156695 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 851C514ED for ; Mon, 23 Sep 2019 12:27:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6B49220867 for ; Mon, 23 Sep 2019 12:27:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393628AbfIWM1d (ORCPT ); Mon, 23 Sep 2019 08:27:33 -0400 Received: from mga06.intel.com ([134.134.136.31]:4334 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732441AbfIWM1c (ORCPT ); Mon, 23 Sep 2019 08:27:32 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 23 Sep 2019 05:27:31 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,539,1559545200"; d="scan'208";a="203116684" Received: from allen-box.sh.intel.com ([10.239.159.136]) by fmsmga001.fm.intel.com with ESMTP; 23 Sep 2019 05:27:26 -0700 From: Lu Baolu To: Joerg Roedel , David Woodhouse , Alex Williamson Cc: ashok.raj@intel.com, sanjay.k.kumar@intel.com, jacob.jun.pan@linux.intel.com, kevin.tian@intel.com, yi.l.liu@intel.com, yi.y.sun@intel.com, iommu@lists.linux-foundation.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Lu Baolu , Yi Sun Subject: [RFC PATCH 4/4] iommu/vt-d: Identify domains using first level page table Date: Mon, 23 Sep 2019 20:24:54 +0800 Message-Id: <20190923122454.9888-5-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190923122454.9888-1-baolu.lu@linux.intel.com> References: <20190923122454.9888-1-baolu.lu@linux.intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This checks whether a domain should use first level page table for map/unmap. And if so, we should attach the domain to the device in first level translation mode. Cc: Ashok Raj Cc: Jacob Pan Cc: Kevin Tian Cc: Liu Yi L Cc: Yi Sun Cc: Sanjay Kumar Signed-off-by: Lu Baolu --- drivers/iommu/intel-iommu.c | 41 ++++++++++++++++++++++++++++++++++--- 1 file changed, 38 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 103480016010..d539e6a6c3dd 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -1722,6 +1722,26 @@ static void free_dmar_iommu(struct intel_iommu *iommu) #endif } +/* + * Check and return whether first level is used by default for + * DMA translation. + */ +static bool first_level_by_default(void) +{ + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; + + rcu_read_lock(); + for_each_active_iommu(iommu, drhd) + if (!sm_supported(iommu) || + !ecap_flts(iommu->ecap) || + !cap_caching_mode(iommu->cap)) + return false; + rcu_read_unlock(); + + return true; +} + static struct dmar_domain *alloc_domain(int flags) { struct dmar_domain *domain; @@ -1736,6 +1756,9 @@ static struct dmar_domain *alloc_domain(int flags) domain->has_iotlb_device = false; INIT_LIST_HEAD(&domain->devices); + if (first_level_by_default()) + domain->flags |= DOMAIN_FLAG_FIRST_LEVEL_TRANS; + return domain; } @@ -2625,6 +2648,11 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu, if (hw_pass_through && domain_type_is_si(domain)) ret = intel_pasid_setup_pass_through(iommu, domain, dev, PASID_RID2PASID); + else if (domain_type_is_flt(domain)) + ret = intel_pasid_setup_first_level(iommu, dev, + domain->pgd, PASID_RID2PASID, + domain->iommu_did[iommu->seq_id], + PASID_FLAG_SUPERVISOR_MODE); else ret = intel_pasid_setup_second_level(iommu, domain, dev, PASID_RID2PASID); @@ -5349,8 +5377,14 @@ static int aux_domain_add_dev(struct dmar_domain *domain, goto attach_failed; /* Setup the PASID entry for mediated devices: */ - ret = intel_pasid_setup_second_level(iommu, domain, dev, - domain->default_pasid); + if (domain_type_is_flt(domain)) + ret = intel_pasid_setup_first_level(iommu, dev, + domain->pgd, domain->default_pasid, + domain->iommu_did[iommu->seq_id], + PASID_FLAG_SUPERVISOR_MODE); + else + ret = intel_pasid_setup_second_level(iommu, domain, dev, + domain->default_pasid); if (ret) goto table_failed; spin_unlock(&iommu->lock); @@ -5583,7 +5617,8 @@ static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, int level = 0; u64 phys = 0; - if (dmar_domain->flags & DOMAIN_FLAG_LOSE_CHILDREN) + if ((dmar_domain->flags & DOMAIN_FLAG_LOSE_CHILDREN) || + (dmar_domain->flags & DOMAIN_FLAG_FIRST_LEVEL_TRANS)) return 0; pte = pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT, &level);