> After realizing the inconsistency on VT-x emulation in VMware and switching
> to VBox, I get the following error in hardware check command:
>
> mjonian@mjonian-VirtualBox:~/Projects/jailhouse/tools$ sudo jailhouse
> hardware check
> Feature Availability
> ------------------------------ ------------------
> Number of CPUs > 1 ok
> Long mode ok
> Traceback (most recent call last):
> File "./jailhouse-hardware-check", line 147, in <module>
> iommu, _ = sysfs_parser.parse_dmar(pci_devices, ioapics, dmar_regions)
> File
>"/home/mjonian/Projects/jailhouse/tools/../pyjailhouse/sysfs_parser.py", line
>338, in parse_dmar
> f = input_open('/sys/firmware/acpi/tables/DMAR', 'rb')
> File
>"/home/mjonian/Projects/jailhouse/tools/../pyjailhouse/sysfs_parser.py", line
>90, in input_open
> raise e
> IOError: [Errno 2] No such file or directory:
> '//sys/firmware/acpi/tables/DMAR'
>
> I’ve checked that VT-x is enabled in bios and I’ve run the VM with the
> intel_iommu=off kernel parameter. To get you out of doubt, I’ve installed
> Ubuntu v20.04 with kernel 5.4.77 natively in a machine and checked all the
> previous. The same result when trying to check the hardware… Any ideas?
>
> Markel.
>>Does your CPU support VT-d?
>>Bram
They do in both cases. In the mentioned natively Ubuntu running laptop and in
the one running VBox. And it is active in Bios.
Markel.
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