diff options
author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2014-06-10 15:39:23 +1000 |
---|---|---|
committer | Alexander Graf <agraf@suse.de> | 2014-06-27 13:48:23 +0200 |
commit | 9fc34ada7e80a7c561f64eb124b2b814a8feca68 (patch) | |
tree | 687518dfe377a74dfc0a2b234273a7ef9c43e41a /include/hw/pci-host | |
parent | 6d8be4c3434783a59ae29f7ea6a792b56c812349 (diff) |
spapr_pci_vfio: Add spapr-pci-vfio-host-bridge to support vfio
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>
Diffstat (limited to 'include/hw/pci-host')
-rw-r--r-- | include/hw/pci-host/spapr.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h index 0934518bbd..6808e967bd 100644 --- a/include/hw/pci-host/spapr.h +++ b/include/hw/pci-host/spapr.h @@ -30,10 +30,14 @@ #define SPAPR_MSIX_MAX_DEVS 32 #define TYPE_SPAPR_PCI_HOST_BRIDGE "spapr-pci-host-bridge" +#define TYPE_SPAPR_PCI_VFIO_HOST_BRIDGE "spapr-pci-vfio-host-bridge" #define SPAPR_PCI_HOST_BRIDGE(obj) \ OBJECT_CHECK(sPAPRPHBState, (obj), TYPE_SPAPR_PCI_HOST_BRIDGE) +#define SPAPR_PCI_VFIO_HOST_BRIDGE(obj) \ + OBJECT_CHECK(sPAPRPHBVFIOState, (obj), TYPE_SPAPR_PCI_VFIO_HOST_BRIDGE) + #define SPAPR_PCI_HOST_BRIDGE_CLASS(klass) \ OBJECT_CLASS_CHECK(sPAPRPHBClass, (klass), TYPE_SPAPR_PCI_HOST_BRIDGE) #define SPAPR_PCI_HOST_BRIDGE_GET_CLASS(obj) \ @@ -41,6 +45,7 @@ typedef struct sPAPRPHBClass sPAPRPHBClass; typedef struct sPAPRPHBState sPAPRPHBState; +typedef struct sPAPRPHBVFIOState sPAPRPHBVFIOState; struct sPAPRPHBClass { PCIHostBridgeClass parent_class; @@ -76,6 +81,12 @@ struct sPAPRPHBState { QLIST_ENTRY(sPAPRPHBState) list; }; +struct sPAPRPHBVFIOState { + sPAPRPHBState phb; + + int32_t iommugroupid; +}; + #define SPAPR_PCI_BASE_BUID 0x800000020000000ULL #define SPAPR_PCI_WINDOW_BASE 0x10000000000ULL |