On Mon, Dec 27, 2010 at 3:30 PM, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote: > On Tue, Dec 21, 2010 at 04:51:04AM +0000, Prasad Joshi wrote: >> Hello All, >> >> This is probably my first mail on this mailing list. I am working on a >> university project on Nvidia or any GPU Pass-through in KVM. I have a > > You picking the hard ones first, eh? I would suggest you do Intel > or ATI as they have actually posted patches for this. Thanks a lot for your reply. Yes indeed, I started with the ATI Radeon RV370 card. Passing the Nvidia card is the ultimate aim of the project. > >> question related to framebuffer. >> >> I was reading few documents on XEN VGA pass-through, the document says >> the first step for pass-through is mapping the framebuffers in the VM >> at specific address, specifically speaking 0xA0000 till 0xC0000. > > I would suggest you look at the code - there have been some patches > posted by AMD engineers on xen-devel for this. > Yes I am looking at those patches as well, including some research papers on the same topic. Here is what I have tried so far. I have 2 graphics cards connected to my machine 1. Nvidia: This is being used by host machine. 2. ATI: Want to pass-through this card to the VM. I tried to pass-through the ATI card to VM. First, there was a problem with ROM BIOS. Then I passed a correct ROM BIOS to QEMU-KVM. Now when I start the VM with ATI card in pass-through mode. I see some garbage output on the monitor attached to the ATI card. I also saw following messages in the system log. [ 2.162294] [drm] Initialized drm 1.1.0 20060810 [ 2.459594] [drm] radeon defaulting to kernel modesetting. [ 2.459596] [drm] radeon kernel modesetting enabled. [ 2.766698] radeon 0000:00:04.0: PCI INT A -> Link[LNKD] -> GSI 10 (level, high) -> IRQ 10 [ 2.766734] radeon 0000:00:04.0: setting latency timer to 64 [ 2.783512] [drm] initializing kernel modesetting (RV380 0x1002:0x5B64). [ 2.792407] [drm] register mmio base: 0x40000000 [ 2.792408] [drm] register mmio size: 65536 [ 2.797177] [drm] Generation 2 PCI interface, using max accessible memory [ 2.797275] radeon 0000:00:04.0: VRAM: 128M 0x00000000F8000000 - 0x00000000FFFFFFFF (128M used) [ 2.797284] radeon 0000:00:04.0: GTT: 512M 0x00000000D8000000 - 0x00000000F7FFFFFF [ 2.798370] radeon 0000:00:04.0: irq 40 for MSI/MSI-X [ 2.870703] radeon 0000:00:04.0: radeon: using MSI. [ 3.151162] [drm] radeon: irq initialized. [ 3.151539] [drm] Detected VRAM RAM=128M, BAR=128M [ 3.151541] [drm] RAM width 128bits DDR [ 3.151610] [drm] radeon: 128M of VRAM memory ready [ 3.151611] [drm] radeon: 512M of GTT memory ready. [ 3.151627] [drm] GART: num cpu pages 131072, num gpu pages 131072 [ 3.152701] [drm] radeon: 1 quad pipes, 1 Z pipes initialized. [ 3.544943] [drm] PCIE GART of 512M enabled (table at 0xF8040000). [ 3.548479] radeon 0000:00:04.0: WB enabled [ 3.549020] [drm] Loading R300 Microcode [ 3.554278] [drm] radeon: ring at 0x00000000D8001000 [ 3.778476] [drm:r100_ring_test] *ERROR* radeon: ring test failed (sracth(0x15E4)=0xCAFEDEAD) [ 3.781010] [drm:r100_cp_init] *ERROR* radeon: cp isn't working (-22). [ 3.782542] radeon 0000:00:04.0: failled initializing CP (-22). [ 3.784006] radeon 0000:00:04.0: Disabling GPU acceleration [ 3.793709] [drm] radeon: cp finalized [ 3.834875] radeon 0000:00:04.0: ffff8800320b4c00 unpin not necessary [ 3.841759] [drm] Radeon Display Connectors [ 3.841766] [drm] Connector 0: [ 3.841771] [drm] VGA [ 3.841777] [drm] DDC: 0x60 0x60 0x60 0x60 0x60 0x60 0x60 0x60 [ 3.841781] [drm] Encoders: [ 3.841785] [drm] CRT1: INTERNAL_DAC1 [ 3.841788] [drm] Connector 1: [ 3.841791] [drm] DVI-I [ 3.841794] [drm] HPD1 [ 3.841799] [drm] DDC: 0x64 0x64 0x64 0x64 0x64 0x64 0x64 0x64 [ 3.841803] [drm] Encoders: [ 3.841806] [drm] CRT2: INTERNAL_DAC2 [ 3.841809] [drm] DFP1: INTERNAL_TMDS1 [ 6.158753] [drm] fb mappable at 0xF8040000 [ 6.158756] [drm] vram apper at 0xF8000000 [ 6.158757] [drm] size 5242880 [ 6.158758] [drm] fb depth is 24 [ 6.158759] [drm] pitch is 5120 [ 13.914196] fb0: radeondrmfb frame buffer device [ 13.914198] drm: registered panic notifier [ 13.914683] [drm] Initialized radeon 2.7.0 20080528 for 0000:00:04.0 on minor 0 The errors [ 3.778476] [drm:r100_ring_test] *ERROR* radeon: ring test failed (sracth(0x15E4)=0xCAFEDEAD) [ 3.781010] [drm:r100_cp_init] *ERROR* radeon: cp isn't working (-22). [ 3.782542] radeon 0000:00:04.0: failled initializing CP (-22). [ 3.784006] radeon 0000:00:04.0: Disabling GPU acceleration Seem to be disabling GPU functionality. For now, I am interested in Graphics functionality of the ATI card and not GPGPU functionality. I will appreciate if you can help me with some information on solving this problem. Let me know if I should be asking this question on another forum. Please keep me in CC. Thanks and Regards, Prasad -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
