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powerpc/pseries/iommu: Switch to xchg_no_kill 

This is the last implementation of iommu_table_ops::exchange() which
we are about to remove.

This implements xchg_no_kill() for pseries. Since it is paravirtual
platform, the hypervisor does TCE invalidations and we do not have
to deal with it here, hence no tce_kill() hook.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190829085252.72370-5-aik@ozlabs.ru
This commit is contained in:
Alexey Kardashevskiy 2019-08-29 18:52:51 +10:00 committed by Michael Ellerman
parent 650ab1e370
commit 021b786811
1 changed files with 3 additions and 2 deletions
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5
arch/powerpc/platforms/pseries/iommu.c
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@ -621,7 +621,8 @@ static void pci_dma_bus_setup_pSeries(struct pci_bus *bus)
#ifdef CONFIG_IOMMU_API
static int tce_exchange_pseries(struct iommu_table *tbl, long index, unsigned
long *tce, enum dma_data_direction *direction)
long *tce, enum dma_data_direction *direction,
bool realmode)
{
long rc;
unsigned long ioba = (unsigned long) index << tbl->it_page_shift;
@ -649,7 +650,7 @@ static int tce_exchange_pseries(struct iommu_table *tbl, long index, unsigned
struct iommu_table_ops iommu_table_lpar_multi_ops = {
.set = tce_buildmulti_pSeriesLP,
#ifdef CONFIG_IOMMU_API
.exchange = tce_exchange_pseries,
.xchg_no_kill = tce_exchange_pseries,
#endif
.clear = tce_freemulti_pSeriesLP,
.get = tce_get_pSeriesLP