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kboot/gpu: Add "no-map" property for reserved memory nodes #334

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merged 1 commit into from
Oct 5, 2023
Merged

kboot/gpu: Add "no-map" property for reserved memory nodes #334

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10 changes: 10 additions & 0 deletions src/kboot_gpu.c
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Original file line number Diff line number Diff line change
Expand Up @@ -395,6 +395,9 @@ static int dt_set_region(void *dt, int sgx, const char *name, const char *path)
if (fdt_setprop_inplace(dt, node, "reg", reg, sizeof(reg)))
bail("FDT: GPU: failed to set reg prop for %s\n", path);

if (fdt_setprop_empty(dt, node, "no-map"))
bail("FDT: GPU: failed to set no-map prop for %s\n", path);

return 0;
}

Expand Down Expand Up @@ -643,6 +646,13 @@ int dt_set_gpu(void *dt)
if (dt_set_region(dt, sgx, "gpu-region", "/reserved-memory/uat-ttbs"))
return -1;

// refresh gpu dt node offset after modifying the dt in dt_set_region()
gpu = fdt_path_offset(dt, "gpu");
if (gpu < 0) {
printf("FDT: GPU: gpu alias not found in device tree\n");
return 0;
}

if (firmware_set_fdt(dt, gpu, "apple,firmware-version", &os_firmware))
return -1;

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