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Commit 11f63d3f authored by Alexey Kardashevskiy's avatar Alexey Kardashevskiy Committed by Benjamin Herrenschmidt
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powerpc/iommu: Add ppc_md.tce_get() callback for use by VFIO 



The upcoming VFIO support requires a way to know which
entry in the TCE map is not empty in order to do cleanup
at QEMU exit/crash. This patch adds such functionality
to POWERNV platform code.

Signed-off-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 4715fed6

arch/powerpc/platforms/powernv/pci.c

+6 −0
Original line number Diff line number Diff line
@@ -446,6 +446,11 @@ static void pnv_tce_free(struct iommu_table *tbl, long index, long npages) 
		pnv_tce_invalidate(tbl, tces, tcep - 1);

}



static unsigned long pnv_tce_get(struct iommu_table *tbl, long index)

{

	return ((u64 *)tbl->it_base)[index - tbl->it_offset];

}



void pnv_pci_setup_iommu_table(struct iommu_table *tbl,

			       void *tce_mem, u64 tce_size,

			       u64 dma_offset)
@@ -596,6 +601,7 @@ void __init pnv_pci_init(void) 
	ppc_md.pci_dma_dev_setup = pnv_pci_dma_dev_setup;

	ppc_md.tce_build = pnv_tce_build;

	ppc_md.tce_free = pnv_tce_free;

	ppc_md.tce_get = pnv_tce_get;

	ppc_md.pci_probe_mode = pnv_pci_probe_mode;

	set_pci_dma_ops(&dma_iommu_ops);