iommu/dma: Add HW MSI(GICv3 ITS) address regions reservation
Modified iommu_dma_get_resv_regions() to include GICv3 ITS region on ACPI based ARM platfiorms which may require HW MSI reservations. Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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@ -19,6 +19,7 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/acpi_iort.h>
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#include <linux/device.h>
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#include <linux/dma-iommu.h>
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#include <linux/gfp.h>
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@ -167,13 +168,18 @@ EXPORT_SYMBOL(iommu_put_dma_cookie);
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*
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* IOMMU drivers can use this to implement their .get_resv_regions callback
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* for general non-IOMMU-specific reservations. Currently, this covers host
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* bridge windows for PCI devices.
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* bridge windows for PCI devices and GICv3 ITS region reservation on ACPI
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* based ARM platforms that may require HW MSI reservation.
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*/
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void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
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{
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struct pci_host_bridge *bridge;
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struct resource_entry *window;
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if (!is_of_node(dev->iommu_fwspec->iommu_fwnode) &&
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iort_iommu_msi_get_resv_regions(dev, list) < 0)
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return;
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if (!dev_is_pci(dev))
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return;
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