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[PATCH v5 1/9] xen/arm: don't pass iommu properties to hwdom for iommu-map
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
- Date: Wed, 4 Oct 2023 10:55:45 -0400
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- Cc: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>
- Delivery-date: Wed, 04 Oct 2023 14:56:47 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
A device tree node for a PCIe root controller may have an iommu-map property [1]
with a phandle reference to the SMMU node, but not necessarily an iommus
property. In this case, we want to treat it the same as we currently handle
devices with an iommus property: don't pass the iommu related properties to
hwdom.
[1]
https://www.kernel.org/doc/Documentation/devicetree/bindings/pci/pci-iommu.txt
Reported-by: Michal Orzel <michal.orzel@xxxxxxx>
Signed-off-by: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
---
v4->v5:
* new patch
---
xen/arch/arm/domain_build.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 24c9019cc43c..7da254709d17 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -1135,6 +1135,8 @@ static int __init write_properties(struct domain *d,
struct kernel_info *kinfo,
* should be skipped.
*/
iommu_node = dt_parse_phandle(node, "iommus", 0);
+ if ( !iommu_node )
+ iommu_node = dt_parse_phandle(node, "iommu-map", 1);
if ( iommu_node && device_get_class(iommu_node) != DEVICE_IOMMU )
iommu_node = NULL;
--
2.42.0
|
