From: Lu Baolu <baolu.lu@linux.intel.com>
Date: Wed, 20 Mar 2019 01:58:34 +0000 (+0800)
Subject: iommu/vt-d: Save the right domain ID used by hardware
X-Git-Tag: v5.4-rc1~1350^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=84c11e4df5aa4955acaa441f0cf1cb2e50daf64b;p=platform%2Fkernel%2Flinux-rpi.git

iommu/vt-d: Save the right domain ID used by hardware

The driver sets a default domain id (FLPT_DEFAULT_DID) in the
first level only pasid entry, but saves a different domain id
in @sdev->did. The value saved in @sdev->did will be used to
invalidate the translation caches. Hence, the driver might
result in invalidating the caches with a wrong domain id.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Fixes: 1c4f88b7f1f92 ("iommu/vt-d: Shared virtual address in scalable mode")
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index f002d47..28cb713 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5335,7 +5335,7 @@ int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sd
 
 	ctx_lo = context[0].lo;
 
-	sdev->did = domain->iommu_did[iommu->seq_id];
+	sdev->did = FLPT_DEFAULT_DID;
 	sdev->sid = PCI_DEVID(info->bus, info->devfn);
 
 	if (!(ctx_lo & CONTEXT_PASIDE)) {