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| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-21 18:55:01 -0400 |
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| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-21 18:55:01 -0400 |
| commit | f96d916ec08ddfb75cad42b587927c1ad3b90c24 (patch) | |
| tree | 14246b912f0bafe5c5c024d34082877d4eb3be1a /wiki/BAR-Emulation-Specification.md | |
| parent | 371d8b16c764f251ac754f5e528b81dee7f35e0c (diff) | |
| download | open-iov-f96d916ec08ddfb75cad42b587927c1ad3b90c24.tar.gz open-iov-f96d916ec08ddfb75cad42b587927c1ad3b90c24.zip | |
r431 sysmem leaf-PTE aperture fix (root-cause candidate): map every host dma_alloc_coherent page as SYSTEM_COHERENT (aperture 2) instead of SYSTEM_NON_COHERENT (3) - the reference RM picks the aperture from the allocation's CPU cache attribute, and non-coherent L2 let engine stores linger invisibly (the no-execute wedge) while re-staged copy-in content stayed invisible to the engine; gsp_phys_rmcall_pte_coh=0 restores the historical aperture for a boot-time A/B
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