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On 24 August 2011 10:55, Mark Knecht <markknecht@×××××.com> wrote: |
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> On Tue, Aug 23, 2011 at 9:18 PM, Hilco Wijbenga |
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> <hilco.wijbenga@×××××.com> wrote: |
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>> On 23 August 2011 20:38, Mark Knecht <markknecht@×××××.com> wrote: |
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>>> Hi all, |
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>>> Can someone point me toward somehow enabling CONFIG_IOMMU_SUPPORT? |
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>>> It is apparently a kernel config option no required by |
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>>> virtualbox-drivers but I'm not finding it in the 3.0.3 kernel. I |
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>>> suspect there's something else I need to enable before this option |
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>>> becomes available? Unfortunately I haven't been able to Google what I |
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>>> need to do to find it. |
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>>> |
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>>> Thanks, |
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>>> Mark |
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>>> |
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>>> * Messages for package app-emulation/virtualbox-modules-4.1.2: |
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>>> |
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>>> * CONFIG_IOMMU_SUPPORT: is not set when it should be. |
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>>> * Please check to make sure these options are set correctly. |
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>>> * Failure to do so may cause unexpected problems. |
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>>> <SNIP> |
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>>> |
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>>> k2 linux # cat .config | grep IOMMU |
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>>> CONFIG_GART_IOMMU=y |
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>>> # CONFIG_CALGARY_IOMMU is not set |
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>>> CONFIG_AMD_IOMMU=y |
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>>> # CONFIG_AMD_IOMMU_STATS is not set |
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>>> CONFIG_IOMMU_HELPER=y |
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>>> CONFIG_IOMMU_API=y |
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>>> # CONFIG_IOMMU_DEBUG is not set |
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>>> # CONFIG_IOMMU_STRESS is not set |
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>>> k2 linux # |
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>> |
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>> I noticed the same. There does not appear to be any such option but |
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>> luckily its absence does not appear to affect running VB at all. |
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>> |
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> |
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> At the time of writing this I haven't tried Gregory's item about the |
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> CONFIG_CALGARY_IOMMU option. I'll try that later when I get to the |
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> machine but the reading I did on the web sounded like that was for IBM |
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> specific hardware. |
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> |
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> Here it seems that on the machine I was working - Intel based, i920 - |
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> VB won't install Win 7 64-bit without it. I get a bunch of messages |
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> that it will install but many cause problems. Are you running any |
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> 64-bit VMs? |
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|
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Sort of. I'm working on installing Gentoo AMD64 in a VB machine. No |
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problems so far but I've only just started (it's a weekend project). |
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Certainly no Windows. |
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|
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> However I've got another Intel machine where I can install Win 7 |
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> 64-bit in VB just fine with no complaints at all. Here's the IOMMU |
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> stuff from that box: |
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> |
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> mark@c2stable ~ $ uname -a |
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> Linux c2stable 3.0.1-gentoo #1 SMP PREEMPT Mon Aug 8 13:05:19 PDT 2011 |
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> x86_64 Intel(R) Core(TM) i7 CPU X 980 @ 3.33GHz GenuineIntel GNU/Linux |
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> mark@c2stable ~ $ zcat /proc/config.gz | grep IOMMU |
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> CONFIG_GART_IOMMU=y |
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> # CONFIG_CALGARY_IOMMU is not set |
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> # CONFIG_AMD_IOMMU is not set |
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> CONFIG_IOMMU_HELPER=y |
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> CONFIG_IOMMU_API=y |
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> # CONFIG_IOMMU_DEBUG is not set |
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> # CONFIG_IOMMU_STRESS is not set |
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> mark@c2stable ~ $ |
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> |
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> Except for the AMD option they seem identical unless I'm misreading something. |
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> |
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> I'm now wondering if there is both a BIOS and chipset component to |
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> making this work? I'm pretty sure I've got all the Vt-d stuff enabled |
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> but I'll have to wait to go into BIOS on both of them to compare. |
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> |
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> I'll try to do a diff later today between both machine's .config files |
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> to look for differences. |
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|
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Can't you simply install the Calgary IOMMU as well? I know that it |
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seems IBM based stuff (I noticed it myself when I was going through |
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the same process) which you probably do not need but I assume it can't |
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hurt (apart from making the kernel a bit bigger). But if it fixes your |
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problem... Probably worth a try. |
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