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

[Venumadhav Josyula]

Hi Alex,

So I had power cycled it multiple number of times.

Thanks,
Regards,
Venu

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________________________________
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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