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>,
"Lu Baolu" <baolu.lu@linux.intel.com>,
David Woodhouse <dwmw2@infradead.org>
Cc: "Tian, Kevin" <kevin.tian@intel.com>,
Raj Ashok <ashok.raj@intel.com>, "Yi Liu" <yi.l.liu@intel.com>,
Eric Auger <eric.auger@redhat.com>,
"Mehta, Sohil" <sohil.mehta@intel.com>,
Joe Perches <joe@perches.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: [PATCH v5 3/8] iommu/vt-d: Reject SVM bind for failed capability check
Date: Mon, 2 Dec 2019 11:58:24 -0800 [thread overview]
Message-ID: <1575316709-54903-4-git-send-email-jacob.jun.pan@linux.intel.com> (raw)
In-Reply-To: <1575316709-54903-1-git-send-email-jacob.jun.pan@linux.intel.com>
Add a check during SVM bind to ensure CPU and IOMMU hardware capabilities
are met.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/iommu/intel-svm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index 716c543488f6..74df10a39dfc 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -238,6 +238,9 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
if (!iommu || dmar_disabled)
return -EINVAL;
+ if (!intel_svm_capable(iommu))
+ return -ENOTSUPP;
+
if (dev_is_pci(dev)) {
pasid_max = pci_max_pasids(to_pci_dev(dev));
if (pasid_max < 0)
--
2.7.4
next prev parent reply other threads:[~2019-12-02 19:53 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-02 19:58 [PATCH v5 0/8] VT-d Native Shared virtual memory cleanup and fixes Jacob Pan
2019-12-02 19:58 ` [PATCH v5 1/8] iommu/vt-d: Fix CPU and IOMMU SVM feature matching checks Jacob Pan
2019-12-02 19:58 ` [PATCH v5 2/8] iommu/vt-d: Match CPU and IOMMU paging mode Jacob Pan
2019-12-02 19:58 ` Jacob Pan [this message]
2019-12-02 19:58 ` [PATCH v5 4/8] iommu/vt-d: Avoid duplicated code for PASID setup Jacob Pan
2019-12-02 19:58 ` [PATCH v5 5/8] iommu/vt-d: Fix off-by-one in PASID allocation Jacob Pan
2019-12-02 19:58 ` [PATCH v5 6/8] iommu/vt-d: Replace Intel specific PASID allocator with IOASID Jacob Pan
2019-12-02 19:58 ` [PATCH v5 7/8] iommu/vt-d: Avoid sending invalid page response Jacob Pan
2019-12-02 19:58 ` [PATCH v5 8/8] iommu/vt-d: Misc macro clean up for SVM Jacob Pan
2019-12-02 20:10 ` Joe Perches
2019-12-03 18:27 ` Jacob Pan
2019-12-09 17:14 ` [PATCH v5 0/8] VT-d Native Shared virtual memory cleanup and fixes Jacob Pan
2019-12-10 1:14 ` Lu Baolu
2019-12-10 20:29 ` Jacob Pan
2019-12-28 2:46 ` Lu Baolu
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