From: Jacob Pan <jacob.jun.pan@linux.intel.com>
To: iommu@lists.linux-foundation.org,
LKML <linux-kernel@vger.kernel.org>,
"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>,
Jean-Philippe Brucker <jean-philippe@linaro.com>,
Eric Auger <eric.auger@redhat.com>,
Dave Jiang <dave.jiang@intel.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: [PATCH 1/2] iommu/vt-d: report SVA feature with generic flag
Date: Mon, 24 Feb 2020 15:26:35 -0800 [thread overview]
Message-ID: <1582586797-61697-2-git-send-email-jacob.jun.pan@linux.intel.com> (raw)
In-Reply-To: <1582586797-61697-1-git-send-email-jacob.jun.pan@linux.intel.com>
Query Shared Virtual Address/Memory capability is a generic feature. Report
Intel SVM as SVA feature such that generic code such as Uacce [1] can use
it.
[1] https://lkml.org/lkml/2020/1/15/604
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
drivers/iommu/intel-iommu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 92c2f2e4197b..5eca6e10d2a4 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -6346,9 +6346,14 @@ intel_iommu_dev_has_feat(struct device *dev, enum iommu_dev_features feat)
static int
intel_iommu_dev_enable_feat(struct device *dev, enum iommu_dev_features feat)
{
+ struct intel_iommu *intel_iommu = dev_to_intel_iommu(dev);
+
if (feat == IOMMU_DEV_FEAT_AUX)
return intel_iommu_enable_auxd(dev);
+ if (feat == IOMMU_DEV_FEAT_SVA)
+ return intel_iommu->flags & VTD_FLAG_SVM_CAPABLE;
+
return -ENODEV;
}
--
2.7.4
next prev parent reply other threads:[~2020-02-24 23:21 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-24 23:26 [PATCH 0/2] Replace Intel SVM with IOMMU SVA APIs Jacob Pan
2020-02-24 23:26 ` Jacob Pan [this message]
2020-02-24 23:34 ` [PATCH 1/2] iommu/vt-d: report SVA feature with generic flag Jacob Pan
2020-02-24 23:26 ` [PATCH 1/2] iommu/vt-d: Report " Jacob Pan
2020-03-20 9:30 ` Jean-Philippe Brucker
2020-02-24 23:26 ` [PATCH 2/2] iommu/vt-d: Replace intel SVM APIs with generic SVA APIs Jacob Pan
2020-02-25 19:10 ` Christoph Hellwig
2020-02-26 7:31 ` Jean-Philippe Brucker
2020-03-18 20:13 ` Jacob Pan
2020-03-20 9:29 ` Jean-Philippe Brucker
2020-03-20 9:43 ` Jean-Philippe Brucker
2020-03-23 23:01 ` Raj, Ashok
2020-03-24 1:42 ` Lu Baolu
2020-03-24 15:53 ` Jacob Pan
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