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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: "Tian, Kevin" <kevin.tian@intel.com>,
	Dave Jiang <dave.jiang@intel.com>,
	Raj Ashok <ashok.raj@intel.com>,
	Jean-Philippe Brucker <jean-philippe@linaro.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

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

WARNING: multiple messages have this Message-ID (diff)
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


  reply	other threads:[~2020-02-24 23:21 UTC|newest]

Thread overview: 28+ 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
2020-02-24 23:26 ` Jacob Pan [this message]
2020-02-24 23:26   ` [PATCH 1/2] iommu/vt-d: report SVA feature with generic flag Jacob Pan
2020-02-24 23:34   ` Jacob Pan
2020-02-24 23:34     ` Jacob Pan
2020-02-24 23:26 ` [PATCH 1/2] iommu/vt-d: Report " Jacob Pan
2020-02-24 23:26   ` Jacob Pan
2020-03-20  9:30   ` Jean-Philippe Brucker
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
2020-02-24 23:26   ` Jacob Pan
2020-02-25 19:10   ` Christoph Hellwig
2020-02-25 19:10     ` Christoph Hellwig
2020-02-26  7:31     ` Jean-Philippe Brucker
2020-02-26  7:31       ` Jean-Philippe Brucker
2020-03-18 20:13   ` Jacob Pan
2020-03-18 20:13     ` Jacob Pan
2020-03-20  9:29   ` Jean-Philippe Brucker
2020-03-20  9:29     ` Jean-Philippe Brucker
2020-03-20  9:43     ` Jean-Philippe Brucker
2020-03-20  9:43       ` Jean-Philippe Brucker
2020-03-23 23:01     ` Raj, Ashok
2020-03-23 23:01       ` Raj, Ashok
2020-03-24  1:42       ` Lu Baolu
2020-03-24  1:42         ` Lu Baolu
2020-03-24 15:53     ` Jacob Pan
2020-03-24 15:53       ` Jacob Pan

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