powerpc/pseries/iommu: Switch to xchg_no_kill (021b7868) · Commits · 戴 / test

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

arch/powerpc/platforms/pseries/iommu.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -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

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