GPU ROM passthrough fixes #1
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git-apply is stricter than GNU patch; aborted with a fatal error Signed-off-by: Dwayne Litzenberger <[email protected]>
Newer AMD GPUs store their initialization routines as bytecode on the
ROM. This fixes the following initialization error inside the VM when
doing PCI passthrough:
radeon 0000:00:05.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0xffff
radeon 0000:00:05.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0xffff
[drm:radeon_get_bios [radeon]] *ERROR* Unable to locate a BIOS ROM
radeon 0000:00:05.0: Fatal error during GPU init
Signed-off-by: Dwayne Litzenberger <[email protected]>
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I'd like to see a feedback on the second patch from xen-pciback maintainer - please send it first to [email protected]. |
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@dlitz I've sent the patches to ML: https://lists.xenproject.org/archives/html/xen-devel/2018-12/msg00063.html |
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With this, I can attach a Radeon HD 6870 GPU to a HVM running Debian and play OpenArena on it. It's delicate and there are still other bugs, but I got it working.
These patches also work against the stable-4.4 (v4.4.38-11) kernel.