I cannot get HVMs with attached PCI devices to boot in Qubes 4.0-rc3. My
processor (AMD Phenom II X3 B75) does have IOMMU support as far as I can
tell from the sources I've found online, but I can't find much info
about whether my motherboard (HP 3047h) supports it. There is only one
generic "virtualization" option in the BIOS. I found a lot of statements
like this online about IOMMU:
Please note that just because a motherboard uses a chipset that
supports IOMMU does not mean it is able to and the bios must have an
ACPI IVRS table to enable the use of it. At least one Asus board is
known to have faulty BIOSes with corrupt ACPI IVRS tables; for such
cases, under Linux, it is possible to specify custom mappings to
override the faulty and/or missing BIOS-provided ones through the use
of the ivrs_ioapic and ivrs_hpet kernel parameters.
What all specific things would I check to see if actions like above
would be advisable or if I could possibly get IOMMU working? How can I
probe my motherboard's support for it directly? And what kernel options
other than the above would be advisable to try for testing purposes?
(I'm not really sure how I'd set those kernel options either.)
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