Gentoo Archives: gentoo-user

From: Corbin Bird <corbinbird@×××××××.net>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Re: Issues with AMD_IOMMU
Date: Tue, 16 May 2017 14:35:37
Message-Id: 591B0DD4.3060108@charter.net
In Reply to: Re: [gentoo-user] Re: Issues with AMD_IOMMU by "Taiidan@gmx.com"
1 On 05/15/2017 09:59 PM, Taiidan@×××.com wrote:
2 > On 05/15/2017 12:58 AM, Ian Zimmerman wrote:
3 >
4 >>> The 990FX / 790FX Chipset doesn't have a GART / AGP Aperature or IOMMU
5 >>> in it. The CPU contains the original K8 IOMMU ( v1 ) engineered /
6 >>> converted from a GART.
7 >>>
8 > The 8 and 9 series (not 7) does have an IOMMU, AMD-Vi v1.26.
9 >
10 > I have two 890 series (but the server flavor - SR5690 chipset) boards
11 > with an IOMMU and it works great, I play games in a VM with an attached
12 > graphics card on my libre firmware KGPE-D16 and devices are DMA restricted.
13 >
14 > Most consumer boards don't properly implement this feature, in fact I
15 > have never seen one that did which is why I bought my coreboot (libre
16 > init variant) D16.
17 > It wouldn't be that difficult to port coreboot to your board if you want
18 > this to work FYI.
19 >
20
21 Thank you for that info.
22
23 Corrections based on fact are appreciated.
24
25 ---
26
27 How does one 'port' coreboot?
28
29 Last time I went to the coreboot site, I didn't see anything really
30 helpful to me.
31
32 Doesn't the 'CPU voltage table firmware blob' require signing NDA's?
33
34
35 Corbin