Device 03:00.0 is the SAS smart array controller in the server (grabbed
from a machine deployed without iommu enable):
03:00.0 Serial Attached SCSI controller: Hewlett-Packard Company Smart Array
Gen9 Controllers (rev 01)
DeviceName: Embedded RAID 1
Subsystem: Hewlett-Packard Company P440ar
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 16
Region 0: Memory at 93300000 (64-bit, non-prefetchable) [size=1M]
Region 2: Memory at 93400000 (64-bit, non-prefetchable) [size=1K]
Region 4: I/O ports at 4000 [size=256]
[virtual] Expansion ROM at 93480000 [disabled] [size=512K]
Capabilities: <access denied>
Kernel driver in use: hpsa
Kernel modules: hpsa
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1641593
Title:
unable to enable iommu on HPE Proliant Gen9 server
Status in linux package in Ubuntu:
Incomplete
Bug description:
I'm using MAAS to enable the following kernel flags on install/boot:
iommu=pt intel_iommu=on
in order to be able to passthrough SR-IOV VF functions to KVM guess;
however when these options are enabled, the servers fail to install
(see attached screenshot).
The install eventually fails - it looks like the writes back to one of
the disks starts to fail for some reason.
Servers are targeted with Xenial and the release 4.4 kernel (no HWE).
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