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From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org
Subject: [PATCH 01/19] iommu: Add def_domain_type() callback in iommu_ops
Date: Sun,  5 Apr 2020 16:30:35 +0800	[thread overview]
Message-ID: <20200405083053.17865-2-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20200405083053.17865-1-baolu.lu@linux.intel.com>

From: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>

Some devices are reqired to use a specific type (identity or dma)
of default domain when they are used with a vendor iommu. When the
system level default domain type is different from it, the vendor
iommu driver has to request a new default domain with
iommu_request_dma_domain_for_dev() and iommu_request_dm_for_dev()
in the add_dev() callback. Unfortunately, these two helpers only
work when the group hasn't been assigned to any other devices,
hence, some vendor iommu driver has to use a private domain if
it fails to request a new default one.

This adds def_domain_type() callback in the iommu_ops, so that
any special requirement of default domain for a device could be
aware by the iommu generic layer.

Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
 include/linux/iommu.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index d1b5f4d98569..7fcd799a84d5 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -248,6 +248,10 @@ struct iommu_iotlb_gather {
  * @cache_invalidate: invalidate translation caches
  * @sva_bind_gpasid: bind guest pasid and mm
  * @sva_unbind_gpasid: unbind guest pasid and mm
+ * @def_domain_type: device default domain type, return value:
+ *		- IOMMU_DOMAIN_IDENTITY: must use an identity domain
+ *		- IOMMU_DOMAIN_DMA: must use a dma domain
+ *		- 0: use the default setting
  * @pgsize_bitmap: bitmap of all possible supported page sizes
  * @owner: Driver module providing these ops
  */
@@ -318,6 +322,8 @@ struct iommu_ops {
 
 	int (*sva_unbind_gpasid)(struct device *dev, int pasid);
 
+	int (*def_domain_type)(struct device *dev);
+
 	unsigned long pgsize_bitmap;
 	struct module *owner;
 };
-- 
2.17.1

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  reply	other threads:[~2020-04-05  8:33 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-05  8:30 [PATCH 00/19] [PULL REQUEST] iommu/vt-d: patches for v5.7 Lu Baolu
2020-04-05  8:30 ` Lu Baolu [this message]
2020-04-05  8:30 ` [PATCH 02/19] iommu: Configure default domain with def_domain_type Lu Baolu
2020-04-05  8:30 ` [PATCH 03/19] iommu/vt-d: Don't force 32bit devices to uses DMA domain Lu Baolu
2020-04-05  8:30 ` [PATCH 04/19] iommu/vt-d: Don't force PCI sub-hierarchy to use " Lu Baolu
2020-04-05  8:30 ` [PATCH 05/19] iommu/vt-d: Add def_domain_type callback Lu Baolu
2020-04-05  8:30 ` [PATCH 06/19] iommu/vt-d: Apply per-device dma_ops Lu Baolu
2020-04-05  8:30 ` [PATCH 07/19] iommu/vt-d: Move domain helper to header Lu Baolu
2020-04-05  8:30 ` [PATCH 08/19] iommu/uapi: Define a mask for bind data Lu Baolu
2020-04-05  8:30 ` [PATCH 09/19] iommu/vt-d: Use a helper function to skip agaw for SL Lu Baolu
2020-04-05  8:30 ` [PATCH 10/19] iommu/vt-d: Add nested translation helper function Lu Baolu
2020-04-05  8:30 ` [PATCH 11/19] iommu/vt-d: Add bind guest PASID support Lu Baolu
2020-04-05  8:30 ` [PATCH 12/19] iommu/vt-d: Support flushing more translation cache types Lu Baolu
2020-04-05  8:30 ` [PATCH 13/19] iommu/vt-d: Add svm/sva invalidate function Lu Baolu
2020-04-05  8:30 ` [PATCH 14/19] iommu/vt-d: Cache virtual command capability register Lu Baolu
2020-04-05  8:30 ` [PATCH 15/19] iommu/vt-d: Enlightened PASID allocation Lu Baolu
2020-04-05  8:30 ` [PATCH 16/19] iommu/vt-d: Add custom allocator for IOASID Lu Baolu
2020-04-05  8:30 ` [PATCH 17/19] iommu/vt-d: Add get_domain_info() helper Lu Baolu
2020-04-05  8:30 ` [PATCH 18/19] iommu/vt-d: Report SVA feature with generic flag Lu Baolu
2020-04-05  8:30 ` [PATCH 19/19] iommu/vt-d: Replace intel SVM APIs with generic SVA APIs Lu Baolu
2020-04-06 13:36 ` [PATCH 00/19] [PULL REQUEST] iommu/vt-d: patches for v5.7 Christoph Hellwig
2020-04-07  0:09   ` Lu Baolu

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