[vfio-users] No IOMMU Groups seen in /sys/kernel/iommu_groups/

[A de Beus]

For HP proliant uefi bios, it should look like

>From the System Utilities screen, select System Configuration > BIOS/Platform Configuration (RBSU) > System Options > Virtualization Options > Intel (R) VT-d and press Enter. 
Select a setting and press Enter. 
Enabled—Enables a hypervisor or operating system supporting this option to use hardware capabilities provided by Intel’s Virtualization Technology for directed I/O. 
Disabled—Does not enable a hypervisor or operating system supporting this option to use hardware capabilities provided by Intel’s Virtualization Technology for directed I/O. 
Press F10.

Yours might be a little different depending on the bios version.  A de Beus


> On Nov 22, 2019, at 10:29, Venumadhav Josyula <vjosyula at parallelwireless.com> wrote:
> 
> 
> Hi Alex,
> 
> So I had power cycled it multiple number of times.
> 
> Thanks,
> Regards,
> Venu
> 
> Get Outlook for Android
> 
> From: Alex Williamson <alex.williamson at redhat.com>
> Sent: Friday, 22 November, 2019, 10:30 pm
> To: Venumadhav Josyula
> Cc: vfio-users at redhat.com; Venumadhav Josyula
> Subject: Re: [vfio-users] No IOMMU Groups seen in /sys/kernel/iommu_groups/
> 
> On Fri, 22 Nov 2019 22:13:32 +0530
> Venumadhav Josyula <vjosyula at gmail.com> wrote:
> 
> > So in the bios I need I check for ACPI :DMAR ?
> 
> It's likely not represented that way, what I'm saying is that the list
> of ACPI tables from your dmesg below should include one named "DMAR".
> It currently does not and until it does, VT-d is not going to work.  A
> BIOS setting to enable the "IOMMU" or "VT-d" is typically required to
> enable support for this table, but I don't know exactly how your BIOS
> exposes it.  If such an option is already enabled in your BIOS, a power
> cycle may be required to complete the process.  Thanks,
> 
> Alex
> 
> [    0.000000] ACPI: RSDP 000000007b7fe014 00024 (v02 HP    )
> [    0.000000] ACPI: XSDT 000000007b7e8188 000EC (v01 HP     ProLiant 00000001      01000013)
> [    0.000000] ACPI: FACP 000000007b7f5000 0010C (v05 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: DSDT 000000007b7e4000 03577 (v02 HP     DSDT     00000002 HPAG 00020000)
> [    0.000000] ACPI: FACS 000000007b5dd000 00040
> [    0.000000] ACPI: UEFI 000000007b5f3000 00042 (v01 HP     ProLiant 00000000      00000000)
> [    0.000000] ACPI: MCEJ 000000007b7fc000 00130 (v01 HP     ProLiant 00000001 INTL 0100000D)
> [    0.000000] ACPI: SSDT 000000007b7fb000 00064 (v02 HP     SpsNvs   00000002 INTL 20130328)
> [    0.000000] ACPI: HEST 000000007b7fa000 000A8 (v01 HP     ProLiant 00000001 INTL 00000001)
> [    0.000000] ACPI: BERT 000000007b7f9000 00030 (v01 HP     ProLiant 00000001 INTL 00000001)
> [    0.000000] ACPI: ERST 000000007b7f8000 00230 (v01 HP     ProLiant 00000001 INTL 00000001)
> [    0.000000] ACPI: EINJ 000000007b7f7000 00150 (v01 HP     ProLiant 00000001 INTL 00000001)
> [    0.000000] ACPI: BGRT 000000007b7f6000 00038 (v01 HP     ProLiant 00000002 HP   01000013)
> [    0.000000] ACPI: HPET 000000007b7f4000 00038 (v01 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: PMCT 000000007b7f3000 00064 (v01 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: WDDT 000000007b7f2000 00040 (v01 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: APIC 000000007b7f1000 0014A (v03 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: MCFG 000000007b7f0000 0003C (v01 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: SLIT 000000007b7ef000 00030 (v01 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: SRAT 000000007b7ee000 00140 (v03 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: SPMI 000000007b7ed000 00041 (v05 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: RASF 000000007b7ec000 00030 (v01 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: SPCR 000000007b7eb000 00050 (v01 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: MSCT 000000007b7ea000 00064 (v01 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: BDAT 000000007b7e9000 00030 (v01 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: PCCT 000000007b7fd000 0006E (v01 HP     ProLiant 00000001 HP   00000001)
> [    0.000000] ACPI: SSDT 000000007b7dd000 0657A (v02 HP     PCISSDT  00000002 HPAG 00020000)
> [    0.000000] ACPI: SSDT 000000007b7dc000 001CB (v02 HP     TIMESSDT 00000002 HPAG 00020000)
> [    0.000000] ACPI: SSDT 000000007b7db000 002F2 (v01 HP         pmab 00000001 INTL 20130328)
> 
> 
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