xen/swiotlb: don't initialize swiotlb twice on arm64

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On arm64 swiotlb is often (not always) already initialized by mem_init.
We don't want to initialize it twice, which would trigger a second
memory allocation. Moreover, the second memory pool is typically made of
high pages and ends up replacing the original memory pool of low pages.
As a side effect of this change, it is possible to have low pages in
swiotlb-xen on arm64.

Signed-off-by: Stefano Stabellini <stefanos@xilinx.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

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Stefano Stabellini 2019-05-28 15:48:22 -07:00 • committed by Konrad Rzeszutek Wilk

parent 063b8271ec

commit 4e7372e0dc

1 changed files with 11 additions and 1 deletions

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drivers/xen/swiotlb-xen.c

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