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VF drivers can't access GMD_ID register over MMIO. The value of the GMD_ID register must be queried from GuC. It is available as GLOBAL_CFG_GMD_ID KLV. Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Reviewed-by: Matt Roper <matthew.d.roper@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240523192240.844-3-michal.wajdeczko@intel.com