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iommu/virtio: Sort reserved regions

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To ease identity mapping support, keep the list of reserved regions
sorted.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Link: https://lore.kernel.org/r/20211201173323.1045819-4-jean-philippe@linaro.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jean-Philippe Brucker 2021-12-01 17:33:23 +00:00 committed by Joerg Roedel
parent f0f07a8462
commit 5610979415
1 changed files with 7 additions and 2 deletions
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9
drivers/iommu/virtio-iommu.c
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@ -423,7 +423,7 @@ static int viommu_add_resv_mem(struct viommu_endpoint *vdev,
size_t size;
u64 start64, end64;
phys_addr_t start, end;
struct iommu_resv_region *region = NULL;
struct iommu_resv_region *region = NULL, *next;
unsigned long prot = IOMMU_WRITE | IOMMU_NOEXEC | IOMMU_MMIO;
start = start64 = le64_to_cpu(mem->start);
@ -454,7 +454,12 @@ static int viommu_add_resv_mem(struct viommu_endpoint *vdev,
if (!region)
return -ENOMEM;
list_add(&region->list, &vdev->resv_regions);
/* Keep the list sorted */
list_for_each_entry(next, &vdev->resv_regions, list) {
if (next->start > region->start)
break;
}
list_add_tail(&region->list, &next->list);
return 0;
}