Re: [Qemu-discuss] Access hardware GPU from Qemu

[Daniel Kraft]

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On 15/02/12 17:57, Mike Lovell wrote:
> On 02/15/2012 07:14 AM, Daniel Kraft wrote:
>> On 10/02/12 17:32, Mike Lovell wrote:
>>> On 02/10/2012 04:42 AM, Daniel Kraft wrote:
>>>> I have a Nvidia GeForce GT 520M in my notebook, but so far I
>>>> was not able to get the correct driver in my Debian system.
>>>> (I'm new to Debian, though, so I probably just missed the
>>>> correct installation procedure yet.)
>>>> 
>>>> Since I only want to use it for special purposes (namely,
>>>> running CUDA calculations), I wonder whether I could install
>>>> Windows in a Qemu system and run the calculations there.  Is
>>>> it possible to make Qemu access the GPU for hardware
>>>> acceleration even when the host system does not have
>>>> appropriate drivers?  Something like giving the guest system
>>>> full hardware access to the graphics card?
>>>> 
>>>> Maybe that's a stupid idea, but I'm no expert in
>>>> virtualization stuff.
>>> its not a stupid idea. there are several cases where using a
>>> gpu in a guest makes sense.
>>> 
>>> what are the rest of the hardware details of the laptop?
>> I don't know what you need to know, but for a starter, here's my
>> lspci output:
>> 
>> 00:00.0 Host bridge: Intel Corporation 2nd Generation Core
>> Processor Family DRAM Controller (rev 09) 00:01.0 PCI bridge:
>> Intel Corporation Xeon E3-1200/2nd Generation Core Processor
>> Family PCI Express Root Port (rev 09) 00:16.0 Communication
>> controller: Intel Corporation 6 Series/C200 Series Chipset Family
>> MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel
>> Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host
>> Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation 6
>> Series/C200 Series Chipset Family High Definition Audio
>> Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation 6
>> Series/C200 Series Chipset Family PCI Express Root Port 1 (rev
>> b4) 00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series
>> Chipset Family PCI Express Root Port 2 (rev b4) 00:1c.3 PCI
>> bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI
>> Express Root Port 4 (rev b4) 00:1c.4 PCI bridge: Intel
>> Corporation 6 Series/C200 Series Chipset Family PCI Express Root
>> Port 5 (rev b4) 00:1d.0 USB controller: Intel Corporation 6
>> Series/C200 Series Chipset Family USB Enhanced Host Controller #1
>> (rev 04) 00:1f.0 ISA bridge: Intel Corporation HM65 Express
>> Chipset Family LPC Controller (rev 04) 00:1f.2 SATA controller:
>> Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA
>> AHCI Controller (rev 04) 00:1f.3 SMBus: Intel Corporation 6
>> Series/C200 Series Chipset Family SMBus Controller (rev 04) 
>> 01:00.0 VGA compatible controller: nVidia Corporation Device 0ded
>> (rev a1) 01:00.1 Audio device: nVidia Corporation GF108 High
>> Definition Audio Controller (rev a1) 07:00.0 Ethernet controller:
>> Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit
>> Ethernet controller (rev 06) 08:00.0 Network controller: Realtek
>> Semiconductor Co., Ltd. RTL8191SEvA Wireless LAN Controller (rev
>> 10) 09:00.0 USB controller: NEC Corporation uPD720200 USB 3.0
>> Host Controller (rev 04)
>> 
> 
> k. so you have a sandy bridge based laptop. what processor is in
> it? if its a core-i3, core-i5 24xx, or one of a few unlucky
> core-i7s, then it doesn't have the necessary support for VT-d, or
> 'Virtualization Technology for Directed I/O.' if you have a core
> i5-25xx or one of the core i7s with support, it will also depend on
> firmware support from the laptop manufacturer. if you go into your
> 'BIOS' and look around you might find an option for vt-d or some
> thing similar. if you find one, make sure to enable it. almost
> every system i've looked for this on have it disabled by default.
> then, if you have the option and have it enabled, it will depend on
> the manufacturer having a implementation of it that works. in the
> desktop space, there are motherboards that have the options for it
> but then don't work in linux. asus seems to be notorious for this.
> i've never looked at doing it for a laptop so i don't know how well
> the vendors support it.

I unfortunately have a Core i3.  So that sounds like it wouldn't be
possible, then.

Thanks anyway for all your help so far!

Daniel


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