Date: Thu, 09 Apr 2015 10:17:41 +0200 From: =?UTF-8?B?R3VzdGF1IFDDqXJleg==?= <gperez@entel.upc.edu> To: freebsd-current@freebsd.org Subject: No IOMMU/DMAR with DELL 3020 Message-ID: <552635A5.5070707@entel.upc.edu>
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Hi,
I'm trying xen dom0 on a DELL optiplex 3020 machine. The machine runs:
root@xen_test:~ # uname -arn
FreeBSD xen_test 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r281184:
The box has a core i5-4590 equipped with VT-d:
root@xen_test:~ # dmesg|grep EPT
VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID
Secondary Processor
Controls=0x7cff<APIC,EPT,DT,RDTSCP,x2APIC,VPID,WBINVD,UG,PAUSE-loop,RDRAND,INVPCID,VMFUNC,VMCS>
EPT Features=0x6334141<XO,PW4,UC,WB,2M,1G,INVEPT,AD,single,all>
Also the box has the last BIOS firmware from its vendor (DELL).
However, even if VT-d is there, iommu is not enabled. Booting in
verbose mode shows me this:
root@xen_test:~ # dmesg|grep DMAR
ACPI: No DMAR table found
which is the reason iommu support isn't enabled.
Shouldn't be DMAR be detected if VT-d is there? Any info I can
provide, let me know.
Best,
Gustau
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O O O Gustau Pérez i Querol
O O O Unitat de Gestió dels departaments
O O O Matemàtica Aplicada IV i Enginyeria Telemàtica
Universitat Politècnica de Catalunya
Edifici C3 - Despatx S101-B
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08034 - Barcelona
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