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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: "Tian, Kevin" <kevin.tian@intel.com>,
	Raj Ashok <ashok.raj@intel.com>, Wu Hao <hao.wu@intel.com>
Subject: [PATCH v2 8/9] iommu/vt-d: Send IOASID bind/unbind notifications
Date: Fri, 21 Aug 2020 21:35:17 -0700	[thread overview]
Message-ID: <1598070918-21321-9-git-send-email-jacob.jun.pan@linux.intel.com> (raw)
In-Reply-To: <1598070918-21321-1-git-send-email-jacob.jun.pan@linux.intel.com>

On Intel Scalable I/O Virtualization (SIOV) enabled platforms with
ENQCMD in use by the guest, KVM must establish a guest-host PASID
translation table prior to the issuing of ENQCMD. PASID translation
table also depends on the IOMMU PASID entry, which is configured during
the guest page table bind time. This patch adds a notification event to
the IOMMU driver such that KVM can be notified when a new guest-host
PASID mapping is established or demolished.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
 drivers/iommu/intel/svm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 600e3ae5b656..d8a5efa75095 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -471,6 +471,11 @@ int intel_svm_bind_gpasid(struct iommu_domain *domain, struct device *dev,
 	}
 
 	mutex_unlock(&pasid_mutex);
+	/*
+	 * Notify KVM new host-guest PASID bind is ready. KVM will set up
+	 * PASID translation table to support guest ENQCMD.
+	 */
+	ioasid_notify(data->hpasid, IOASID_BIND, IOASID_NOTIFY_SET);
 	return ret;
 }
 
@@ -510,6 +515,8 @@ int intel_svm_unbind_gpasid(struct device *dev, int pasid)
 				 * and perform cleanup.
 				 */
 				ioasid_attach_data(pasid, NULL);
+				ioasid_notify(pasid, IOASID_UNBIND,
+					IOASID_NOTIFY_SET);
 				kfree(svm);
 			}
 		}
-- 
2.7.4

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  parent reply	other threads:[~2020-08-22  7:09 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-22  4:35 [PATCH v2 0/9] IOASID extensions for guest SVA Jacob Pan
2020-08-22  4:35 ` [PATCH v2 1/9] docs: Document IO Address Space ID (IOASID) APIs Jacob Pan
2020-08-23  7:05   ` Lu Baolu
2020-08-28 17:01     ` Jacob Pan
2020-08-24 10:32   ` Jean-Philippe Brucker
2020-08-27 16:21     ` Auger Eric
2020-09-01 16:56       ` Jacob Pan
2020-09-07  8:03         ` Auger Eric
2020-09-08 17:29           ` Jacob Pan
2020-08-28 22:24     ` Jacob Pan
2020-08-22  4:35 ` [PATCH v2 2/9] iommu/ioasid: Rename ioasid_set_data() Jacob Pan
2020-08-24 18:29   ` Jean-Philippe Brucker
2020-09-01 11:51   ` Auger Eric
2020-08-22  4:35 ` [PATCH v2 3/9] iommu/ioasid: Introduce ioasid_set APIs Jacob Pan
2020-08-22 12:53   ` kernel test robot
2020-08-24  2:24   ` Lu Baolu
2020-09-01 21:28     ` Jacob Pan
2020-09-02  2:39       ` Lu Baolu
2020-08-24 18:28   ` Jean-Philippe Brucker
2020-08-24 18:30     ` Randy Dunlap
2020-09-02 21:46       ` Jacob Pan
2020-08-24 18:34     ` Randy Dunlap
2020-09-02 21:47       ` Jacob Pan
2020-09-02 21:44     ` Jacob Pan
2020-09-01 11:51   ` Auger Eric
2020-09-03 21:07     ` Jacob Pan
2020-09-07  8:04       ` Auger Eric
2020-08-22  4:35 ` [PATCH v2 4/9] iommu/ioasid: Add reference couting functions Jacob Pan
2020-08-24  2:26   ` Lu Baolu
2020-08-25 10:20     ` Jean-Philippe Brucker
2020-08-25 10:19   ` Jean-Philippe Brucker
2020-09-08 20:30     ` Jacob Pan
2020-09-01 12:13   ` Auger Eric
2020-09-08 20:49     ` Jacob Pan
2020-09-24 18:29   ` Shameerali Kolothum Thodi
2020-08-22  4:35 ` [PATCH v2 5/9] iommu/ioasid: Introduce ioasid_set private ID Jacob Pan
2020-08-22  8:36   ` kernel test robot
2020-08-22  9:03   ` kernel test robot
2020-08-25 10:22   ` Jean-Philippe Brucker
2020-09-08 22:19     ` Jacob Pan
2020-09-01 15:38   ` Auger Eric
2020-09-08 22:40     ` Jacob Pan
2020-09-10  9:18       ` Auger Eric
2020-08-22  4:35 ` [PATCH v2 6/9] iommu/ioasid: Introduce notification APIs Jacob Pan
2020-08-25 10:26   ` Jean-Philippe Brucker
2020-09-09 20:37     ` Jacob Pan
2020-09-01 16:49   ` Auger Eric
2020-09-09 22:58     ` Jacob Pan
2020-09-10  8:59       ` Auger Eric
2020-08-22  4:35 ` [PATCH v2 7/9] iommu/vt-d: Listen to IOASID notifications Jacob Pan
2020-09-01 17:03   ` Auger Eric
2020-09-10  4:54     ` Jacob Pan
2020-08-22  4:35 ` Jacob Pan [this message]
2020-08-22  4:35 ` [PATCH v2 9/9] iommu/vt-d: Store guest PASID during bind Jacob Pan
2020-09-01 17:08   ` Auger Eric
2020-09-10 17:12     ` Jacob Pan

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