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| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-05 12:25:05 -0400 |
|---|---|---|
| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-10-05 12:25:05 -0400 |
| commit | 549d1e8126f96b3515d37037ae22e0dce430c20b (patch) | |
| tree | 5fc949da9f724b75a84dc8b5fdc4e6462ff94335 /kernel/bar_init.c | |
| parent | 3b1dcb87279a2f58210b87028a39c9a0932faf2c (diff) | |
| download | open-iov-549d1e8126f96b3515d37037ae22e0dce430c20b.tar.gz open-iov-549d1e8126f96b3515d37037ae22e0dce430c20b.zip | |
vgsp: per-mdev emulated VRAM size (1.0 multiple mediate sizes)
- nv_vgpu_type_info/ioctl gain vram_mb; nv_vgpu_device gains fb_emul_size
bound from the mdev type at create (default 512 MiB).
- New nvidia-vgpu-turing-1g type (1024 MiB); turing max_instances 1 -> 2;
show_description reports the per-type framebuffer and max_instance.
- Thread fb_emul_size through GSCI fb_length/region/frtsOffset, WPR2,
NV_PFB_PRI_MMU_LOCAL_MEMORY_RANGE, the vidmem allocator bound and the BAR1
shadow; bar_info callback uses the per-device size.
- UNTESTED at commit time: builds clean; validation blocked by the Xid 140
incident (reboot pending). See Handoff-vGPU-IO.md ADDENDUM 48.
Diffstat (limited to 'kernel/bar_init.c')
| -rw-r--r-- | kernel/bar_init.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/bar_init.c b/kernel/bar_init.c index 5e4b0a0..f4c982a 100644 --- a/kernel/bar_init.c +++ b/kernel/bar_init.c @@ -62,9 +62,10 @@ int nv_vgpu_bar_init(struct nv_vgpu_device *vgpu) * accesses must hit our own clean buffer, not the (broken) host * GPU's VRAM. Allocated lazily on first use to keep mdev create * cheap; 256MB to match the GSCI fb size. */ - vgpu->bars[1].vaddr = vzalloc(NV_VGPU_BAR1_SIZE); + vgpu->bars[1].vaddr = vzalloc(nv_vgpu_fb_emul_size(vgpu)); if (!vgpu->bars[1].vaddr) { - nv_vgpu_err(vgpu, "Failed to allocate emulated vidmem (256MB)"); + nv_vgpu_err(vgpu, "Failed to allocate emulated vidmem (%llu MiB)", + (unsigned long long)(nv_vgpu_fb_emul_size(vgpu) >> 20)); return -ENOMEM; } nv_vgpu_info(vgpu, "BAR1: gpa=0x%llx, size=0x%llx, emulated vidmem=%p", |