From 7df953bd456da45f761064974820ab5c3fd7b2aa Mon Sep 17 00:00:00 2001 From: Knut Omang Date: Sun, 4 Oct 2015 15:48:50 +0200 Subject: intel_iommu: Add support for translation for devices behind bridges - Use a hash table indexed on bus pointers to store information about buses instead of using the bus numbers. Bus pointers are stored in a new VTDBus struct together with the vector of device address space pointers indexed by devfn. - The bus number is still used for lookup for selective SID based invalidate, in which case the bus number is lazily resolved from the bus hash table and cached in a separate index. Signed-off-by: Knut Omang Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- include/hw/i386/intel_iommu.h | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h index e321ee4fbc..5dbadb785c 100644 --- a/include/hw/i386/intel_iommu.h +++ b/include/hw/i386/intel_iommu.h @@ -49,6 +49,7 @@ typedef struct VTDContextCacheEntry VTDContextCacheEntry; typedef struct IntelIOMMUState IntelIOMMUState; typedef struct VTDAddressSpace VTDAddressSpace; typedef struct VTDIOTLBEntry VTDIOTLBEntry; +typedef struct VTDBus VTDBus; /* Context-Entry */ struct VTDContextEntry { @@ -65,7 +66,7 @@ struct VTDContextCacheEntry { }; struct VTDAddressSpace { - uint8_t bus_num; + PCIBus *bus; uint8_t devfn; AddressSpace as; MemoryRegion iommu; @@ -73,6 +74,11 @@ struct VTDAddressSpace { VTDContextCacheEntry context_cache_entry; }; +struct VTDBus { + PCIBus* bus; /* A reference to the bus to provide translation for */ + VTDAddressSpace *dev_as[0]; /* A table of VTDAddressSpace objects indexed by devfn */ +}; + struct VTDIOTLBEntry { uint64_t gfn; uint16_t domain_id; @@ -114,7 +120,13 @@ struct IntelIOMMUState { GHashTable *iotlb; /* IOTLB */ MemoryRegionIOMMUOps iommu_ops; - VTDAddressSpace **address_spaces[VTD_PCI_BUS_MAX]; + GHashTable *vtd_as_by_busptr; /* VTDBus objects indexed by PCIBus* reference */ + VTDBus *vtd_as_by_bus_num[VTD_PCI_BUS_MAX]; /* VTDBus objects indexed by bus number */ }; +/* Find the VTD Address space associated with the given bus pointer, + * create a new one if none exists + */ +VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn); + #endif -- cgit v1.2.3-55-g7522