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Large multi-GPU passthrough configurations can exhaust the current MMIO window sizing rule (1/8 of guest physical address space), especially with newer GPUs that have very large BAR requirements and alignment overhead. With 46-bit guest physical addressing, the 1/8 rule provides an 8TB MMIO window. Newer GPUs with 512GB VRAM can exhaust an 8TB window when passing through up to 8 devices. Increase the MMIO window size to 1/4 of guest physical address space. This provides a 16TB MMIO window on a 46-bit setup. Tested with 8-GPU passthrough (512GB VRAM per GPU). With this change, all GPUs are visible and functional in the VM; without it, one GPU was unusable. Signed-off-by: ramkumar.s <ramkumar.s@nutanix.com> |
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| .. | ||
| X64 | ||
| Cmos.c | ||
| Igvm.c | ||
| IntelTdx.c | ||
| IntelTdxNull.c | ||
| MemDetect.c | ||
| Platform.c | ||
| PlatformInitLib.inf | ||