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I7-14700 and Asrock z690 extreme - can't figure out PCIE passthrogh (self.selfhosted)

submitted 8 months ago by nemanin to c/selfhosted

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I can’t even figure out how to tell if it’s supported or not. If it is supported, I can’t figure out how to enable it. If it is enabled, idk where I should be seeing it in proxmox!

Can anyone point me in the right direction?

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[–] [email protected] 0 points 8 months ago (5 children)

Yes they are different. VT-d is purely a function of the CPU (passed the BIOS enabling option).

First you will want to look at the output of acpidump | egrep "DMAR|IVRS", then you will also want to very that IOMMU groups don't group your GFX with something that won't be passed through using something like: https://gist.github.com/r15ch13/ba2d738985fce8990a4e9f32d07c6ada

[–] nemanin 1 points 8 months ago (4 children)

This is in proxmox?

How can I tell if my mobo even supports it?

[–] [email protected] 2 points 8 months ago (3 children)

Run those two commands in the command line, post the result here

[–] nemanin 1 points 6 months ago

sorry this took so long.. you know, life. trying that command altogether, I get this response: -bash: acpidump: command not found

trying just egrep "DMAR|IVRS" (in case they are two commands) seems to hang the terminal session.

I tried following a guide to enable PICe passthrough and get this. One important thing, there is no discrete GPU at the moment, I'm trying to pass through an HBA..

root@prox:~# dmesg | grep -e IOMMU [ 0.100411] DMAR: IOMMU enabled [ 0.254862] DMAR-IR: IOAPIC id 2 under DRHD base 0xfed91000 IOMMU 1 [ 0.629143] pci 0000:00:02.0: DMAR: Skip IOMMU disabling for graphics [ 0.713978] DMAR: IOMMU feature fl1gp_support inconsistent [ 0.713979] DMAR: IOMMU feature pgsel_inv inconsistent [ 0.713980] DMAR: IOMMU feature nwfs inconsistent [ 0.713981] DMAR: IOMMU feature dit inconsistent [ 0.713982] DMAR: IOMMU feature sc_support inconsistent [ 0.713983] DMAR: IOMMU feature dev_iotlb_support inconsistent

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