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#1 2015-09-25 12:11:19
- Bladesy
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- Registered: 2015-08-31
- Posts: 26
[SOLVED] Enabling IOMMU support on the kernel
Hello all, I'm trying to set up PCI passthrough with qemu at the minute, following this guide.
It says that I have to enable IOMMU support in the kernel first, but not only am I unsure of what that is, I've no idea where in arch I'd have to set it on.
Would anyone happen to know how to do this?
Last edited by Bladesy (2015-09-25 13:07:06)
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#2 2015-09-25 12:28:16
- byte
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- From: Düsseldorf (DE)
- Registered: 2006-05-01
- Posts: 2,046
Re: [SOLVED] Enabling IOMMU support on the kernel
The article explains every single bit, there's nothing different with Arch.
You need to adapt the part about the "iommu" kernel boot parameter for your boot loader, but everything else should be same with any current distribution.
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#3 2015-09-25 12:28:27
- DragonOpsZ
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- Registered: 2015-09-25
- Posts: 1
Re: [SOLVED] Enabling IOMMU support on the kernel
https://www.reddit.com/r/pcmasterrace/c … e_at_near/
I'm pretty sure this is what you're looking to do, and this guide goes over IOMMU, so I hope it helps!
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#4 2015-09-25 12:48:30
- Bladesy
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- Registered: 2015-08-31
- Posts: 26
Re: [SOLVED] Enabling IOMMU support on the kernel
I can't see my i5-4690k or MSI z97 on the supported hardware list for IOMMU, but the list says it isn't comprehensive, and I know my CPU supports VT-D - should it still work anyway?
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#5 2015-09-25 12:57:43
- byte
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- From: Düsseldorf (DE)
- Registered: 2006-05-01
- Posts: 2,046
Re: [SOLVED] Enabling IOMMU support on the kernel
Yes.
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#6 2015-09-25 13:06:48
- Bladesy
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- Registered: 2015-08-31
- Posts: 26
Re: [SOLVED] Enabling IOMMU support on the kernel
Thanks for your help, I got it enabled and checked it was functioning by using both guides at the same time - the reddit guide had all the right commands, while the original was very simplistic.
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#7 2015-09-25 13:09:43
- ukhippo
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- From: Non-paged pool
- Registered: 2014-02-21
- Posts: 366
Re: [SOLVED] Enabling IOMMU support on the kernel
The post you originally linked to says it all. You check ark.intel.com to see whether your processor supports VT-d, and also check your motherboard's firmware (BIOS) to see if there is an option to enable VT-d (and enable it if the option is there - in my experience most firmwares have the option disabled by default).
Edit: too slow replying!
Last edited by ukhippo (2015-09-25 13:10:29)
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