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vfio/spapr_tce: Invalidate multiple TCEs at once
authorAlexey Kardashevskiy <aik@ozlabs.ru>
Thu, 29 Aug 2019 08:52:50 +0000 (18:52 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Thu, 29 Aug 2019 23:40:14 +0000 (09:40 +1000)
commit650ab1e370cdb61ba5c7495006f4376e02374da0
tree99f4db55e278275d846cf9bff710114248ee9b81tree | snapshot
parent01b7d128b5a7f0d09626c090093ff44155f347c9commit | diff
vfio/spapr_tce: Invalidate multiple TCEs at once

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
drivers/vfio/vfio_iommu_spapr_tce.c diff | blob | history