Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Jacob Pan <jacob.pan.linux@gmail.com>
To:     iommu@lists.linux-foundation.org,
        LKML <linux-kernel@vger.kernel.org>,
        Jean-Philippe Brucker <jean-philippe@linaro.com>,
        "Lu Baolu" <baolu.lu@linux.intel.com>,
        Joerg Roedel <joro@8bytes.org>,
        David Woodhouse <dwmw2@infradead.org>
Cc:     Yi Liu <yi.l.liu@intel.com>, "Tian, Kevin" <kevin.tian@intel.com>,
        Raj Ashok <ashok.raj@intel.com>,
        Eric Auger <eric.auger@redhat.com>, Wu Hao <hao.wu@intel.com>
Subject: [PATCH v2 9/9] iommu/vt-d: Store guest PASID during bind
Date:   Fri, 21 Aug 2020 21:35:18 -0700
Message-Id: <1598070918-21321-10-git-send-email-jacob.jun.pan@linux.intel.com>
In-Reply-To: <1598070918-21321-1-git-send-email-jacob.jun.pan@linux.intel.com>
References: <1598070918-21321-1-git-send-email-jacob.jun.pan@linux.intel.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

IOASID core maintains the guest-host mapping in the form of SPID and
IOASID. This patch assigns the guest PASID (if valid) as SPID while
binding guest page table with a host PASID. This mapping will be used
for lookup and notifications.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
 drivers/iommu/intel/svm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index d8a5efa75095..4c958b1aec4c 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -406,6 +406,7 @@ int intel_svm_bind_gpasid(struct iommu_domain *domain, struct device *dev,
 		if (data->flags & IOMMU_SVA_GPASID_VAL) {
 			svm->gpasid = data->gpasid;
 			svm->flags |= SVM_FLAG_GUEST_PASID;
+			ioasid_attach_spid(data->hpasid, data->gpasid);
 		}
 		svm->iommu = iommu;
 		/*
@@ -517,6 +518,7 @@ int intel_svm_unbind_gpasid(struct device *dev, int pasid)
 				ioasid_attach_data(pasid, NULL);
 				ioasid_notify(pasid, IOASID_UNBIND,
 					IOASID_NOTIFY_SET);
+				ioasid_attach_spid(pasid, INVALID_IOASID);
 				kfree(svm);
 			}
 		}
-- 
2.7.4