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The patch adds a spapr-pci-vfio-host-bridge device type which is a PCI Host Bridge with VFIO support. The new device inherits from the spapr-pci-host-bridge device and adds an "iommu" property which is an IOMMU id. This ID represents a minimal entity for which IOMMU isolation can be guaranteed. In SPAPR architecture IOMMU group is called a Partitionable Endpoint (PE). Current implementation supports one IOMMU id per QEMU VFIO PHB. Since SPAPR allows multiple PHB for no extra cost, this does not seem to be a problem. This limitation may change in the future though. Example of use: Configure and Add 3 functions of a multifunctional device to QEMU: (the NEC PCI USB card is used as an example here): -device spapr-pci-vfio-host-bridge,id=USB,iommu=4,index=7 \ -device vfio-pci,host=4:0:1.0,addr=1.0,bus=USB,multifunction=true -device vfio-pci,host=4:0:1.1,addr=1.1,bus=USB -device vfio-pci,host=4:0:1.2,addr=1.2,bus=USB where: * index=7 is a QEMU PHB index (used as source for MMIO/MSI/IO windows offset); * iommu=4 is an IOMMU id which can be found in sysfs: [aik@vpl2 ~]$ cd /sys/bus/pci/devices/0004:00:00.0/ [aik@vpl2 0004:00:00.0]$ ls -l iommu_group lrwxrwxrwx 1 root root 0 Jun 5 12:49 iommu_group -> ../../../kernel/iommu_groups/4 Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Alexander Graf <agraf@suse.de>
23 lines
756 B
Text
23 lines
756 B
Text
# shared objects
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obj-y += ppc.o ppc_booke.o
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# IBM pSeries (sPAPR)
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obj-$(CONFIG_PSERIES) += spapr.o spapr_vio.o spapr_events.o
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obj-$(CONFIG_PSERIES) += spapr_hcall.o spapr_iommu.o spapr_rtas.o
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obj-$(CONFIG_PSERIES) += spapr_pci.o
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ifeq ($(CONFIG_PCI)$(CONFIG_PSERIES)$(CONFIG_LINUX), yyy)
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obj-y += spapr_pci_vfio.o
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endif
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# PowerPC 4xx boards
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obj-y += ppc405_boards.o ppc4xx_devs.o ppc405_uc.o ppc440_bamboo.o
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obj-y += ppc4xx_pci.o
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# PReP
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obj-$(CONFIG_PREP) += prep.o
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# OldWorld PowerMac
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obj-$(CONFIG_MAC) += mac_oldworld.o
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# NewWorld PowerMac
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obj-$(CONFIG_MAC) += mac_newworld.o
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# e500
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obj-$(CONFIG_E500) += e500.o mpc8544ds.o e500plat.o
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obj-$(CONFIG_E500) += mpc8544_guts.o ppce500_spin.o
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# PowerPC 440 Xilinx ML507 reference board.
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obj-y += virtex_ml507.o
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