Hi
I'm trying to do a pci-passthrough of Intel 82599 10GbE card, with guest
having 8G of memory. I see following error -
intel_iommu_map: iommu width (48) is not sufficient for the mapped
address (fffffffffe001000)
kvm_iommu_map_address:iommu failed to map pfn=45800
I checked IOMMU capability register and SAGAW as well as MGAW are 48bits
for both IOMMU.
# dmesg | grep ecap
dmar: IOMMU 0: reg_base_addr dfff0000 ver 1:0 cap d2078c106f0462 ecap f020fe
dmar: IOMMU 1: reg_base_addr bfff0000 ver 1:0 cap d2078c106f0462 ecap f020fe
# cat /proc/cpuinfo | grep "address sizes"
address sizes : 46 bits physical, 48 bits virtual
In DMAR table, I see host address width set to "2D", i.e. 46bit, which
is ok as it is same as physical address size. Any suggestions on what
might be going wrong here?
Thanks,
nt
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