vfio/spapr_tce: Invalidate multiple TCEs at once

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Invalidating a TCE cache entry for each updated TCE is quite expensive.
This makes use of the new iommu_table_ops::xchg_no_kill()/tce_kill()
callbacks to bring down the time spent in mapping a huge guest DMA window.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190829085252.72370-4-aik@ozlabs.ru

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Alexey Kardashevskiy 2019-08-29 18:52:50 +10:00 • committed by Michael Ellerman

parent 01b7d128b5

commit 650ab1e370

1 changed files with 12 additions and 6 deletions

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drivers/vfio/vfio_iommu_spapr_tce.c

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