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From: Jacob Pan <jacob.jun.pan@linux.intel.com>
To: iommu@lists.linux-foundation.org,
	LKML <linux-kernel@vger.kernel.org>,
	Joerg Roedel <joro@8bytes.org>,
	David Woodhouse <dwmw2@infradead.org>,
	Jean-Philippe Brucker <jean-philippe.brucker@arm.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Rafael Wysocki <rafael.j.wysocki@intel.com>
Cc: "Liu, Yi L" <yi.l.liu@intel.com>,
	Lan Tianyu <tianyu.lan@intel.com>,
	"Tian, Kevin" <kevin.tian@intel.com>,
	Raj Ashok <ashok.raj@intel.com>,
	Alex Williamson <alex.williamson@redhat.com>,
	Jean Delvare <khali@linux-fr.org>,
	"Christoph Hellwig" <hch@infradead.org>,
	Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: [PATCH v4 19/22] iommu/intel-svm: do not flush iotlb for viommu
Date: Thu, 22 Mar 2018 20:12:11 -0700	[thread overview]
Message-ID: <1521774734-48433-20-git-send-email-jacob.jun.pan@linux.intel.com> (raw)
In-Reply-To: <1521774734-48433-1-git-send-email-jacob.jun.pan@linux.intel.com>

vIOMMU passdown invalidation will be inclusive, PASID cache invalidation
includes TLBs. See Intel VT-d Specification Ch 6.5.2.2 for details.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
 drivers/iommu/intel-svm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index 3a7bc77..66b8e10 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -284,7 +284,9 @@ static void intel_mm_release(struct mmu_notifier *mn, struct mm_struct *mm)
 	rcu_read_lock();
 	list_for_each_entry_rcu(sdev, &svm->devs, list) {
 		intel_flush_pasid_dev(svm, sdev, svm->pasid);
-		intel_flush_svm_range_dev(svm, sdev, 0, -1, 0, !svm->mm);
+		/* for emulated iommu, PASID cache invalidation implies IOTLB/DTLB */
+		if (!cap_caching_mode(svm->iommu->cap))
+			intel_flush_svm_range_dev(svm, sdev, 0, -1, 0, !svm->mm);
 	}
 	rcu_read_unlock();
 
-- 
2.7.4

  parent reply	other threads:[~2018-03-23  3:12 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-23  3:11 [PATCH v4 00/22] IOMMU and VT-d driver support for Shared Virtual Address (SVA) Jacob Pan
2018-03-23  3:11 ` [PATCH v4 01/22] iommu: introduce bind_pasid_table API function Jacob Pan
2018-03-23  3:11 ` [PATCH v4 02/22] iommu/vt-d: move device_domain_info to header Jacob Pan
2018-03-23  3:11 ` [PATCH v4 03/22] iommu/vt-d: add a flag for pasid table bound status Jacob Pan
2018-03-23  3:11 ` [PATCH v4 04/22] iommu/vt-d: add bind_pasid_table function Jacob Pan
2018-03-23  3:11 ` [PATCH v4 05/22] iommu: introduce iommu invalidate API function Jacob Pan
2018-03-23  3:11 ` [PATCH v4 06/22] iommu/vt-d: add definitions for PFSID Jacob Pan
2018-03-23  3:11 ` [PATCH v4 07/22] iommu/vt-d: fix dev iotlb pfsid use Jacob Pan
2018-03-23  3:12 ` [PATCH v4 08/22] iommu/vt-d: support flushing more translation cache types Jacob Pan
2018-03-23  3:12 ` [PATCH v4 09/22] iommu/vt-d: add svm/sva invalidate function Jacob Pan
2018-03-23  3:12 ` [PATCH v4 10/22] iommu: introduce device fault data Jacob Pan
2018-03-23  3:12 ` [PATCH v4 11/22] driver core: add per device iommu param Jacob Pan
2018-03-23  8:12   ` Greg Kroah-Hartman
2018-03-23  3:12 ` [PATCH v4 12/22] iommu: introduce device fault report API Jacob Pan
2018-03-23  3:12 ` [PATCH v4 13/22] iommu: introduce page response function Jacob Pan
2018-03-23  3:12 ` [PATCH v4 14/22] iommu: handle page response timeout Jacob Pan
2018-03-23  3:12 ` [PATCH v4 15/22] iommu/config: add build dependency for dmar Jacob Pan
2018-03-23  3:12 ` [PATCH v4 16/22] iommu/vt-d: report non-recoverable faults to device Jacob Pan
2018-05-14  6:55   ` Liu, Yi L
2018-03-23  3:12 ` [PATCH v4 17/22] iommu/intel-svm: report device page request Jacob Pan
2018-05-14  6:56   ` Liu, Yi L
2018-05-14 18:30     ` Jacob Pan
2018-03-23  3:12 ` [PATCH v4 18/22] iommu/intel-svm: replace dev ops with fault report API Jacob Pan
2018-03-23  3:12 ` Jacob Pan [this message]
2018-03-23  3:12 ` [PATCH v4 20/22] iommu/vt-d: add intel iommu page response function Jacob Pan
2018-03-24 23:19   ` kbuild test robot
2018-03-24 23:19   ` [RFC PATCH] iommu/vt-d: intel_iommu_page_response() can be static kbuild test robot
2018-03-23  3:12 ` [PATCH v4 21/22] trace/iommu: add sva trace events Jacob Pan
2018-03-23  3:12 ` [PATCH v4 22/22] iommu: use sva invalidate and device fault trace event Jacob Pan
2018-04-16 21:48 [PATCH v4 00/22] IOMMU and VT-d driver support for Shared Virtual Address (SVA) Jacob Pan
2018-04-16 21:49 ` [PATCH v4 19/22] iommu/intel-svm: do not flush iotlb for viommu Jacob Pan

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