iommu/iova: Separate out rcache init

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Currently the rcache structures are allocated for all IOVA domains, even if
they do not use "fast" alloc+free interface. This is wasteful of memory.

In addition, fails in init_iova_rcaches() are not handled safely, which is
less than ideal.

Make "fast" users call a separate rcache init explicitly, which includes
error checking.

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://lore.kernel.org/r/1643882360-241739-1-git-send-email-john.garry@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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This commit is contained in:

John Garry 2022-02-03 17:59:20 +08:00 • committed by Joerg Roedel

parent 114a6f5015

commit 32e92d9f6f

4 changed files with 77 additions and 26 deletions

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4

drivers/iommu/dma-iommu.c

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73

drivers/iommu/iova.c

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11

drivers/vdpa/vdpa_user/iova_domain.c

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15

include/linux/iova.h

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