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drm/amd: Taint the kernel when enabling overdrive

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Some distributions have been patching amdgpu to enable overdrive by
default which may compromise stability.  Furthermore when bug reports
are brought upstream it's not obvious that the system has been tampered
with.

When overdrive is enabled taint the kernel and leave a critical message
in the logs for users so that it's obvious in a bug report it's been
tampered with.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mario Limonciello 2024-09-25 15:05:07 -05:00 committed by Alex Deucher
parent b5353c05ea
commit b472b8d829
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
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@ -2986,6 +2986,12 @@ static int __init amdgpu_init(void)
/* Ignore KFD init failures. Normal when CONFIG_HSA_AMD is not set. */
amdgpu_amdkfd_init();
if (amdgpu_pp_feature_mask & PP_OVERDRIVE_MASK) {
add_taint(TAINT_CPU_OUT_OF_SPEC, LOCKDEP_STILL_OK);
pr_crit("Overdrive is enabled, please disable it before "
"reporting any bugs unrelated to overdrive.\n");
}
/* let modprobe override vga console setting */
return pci_register_driver(&amdgpu_kms_pci_driver);