FEATURE_GLXVAL_SHIFT 1777 drivers/iommu/amd_iommu_init.c 		glxval >>= FEATURE_GLXVAL_SHIFT;
FEATURE_GLXVAL_SHIFT  101 drivers/iommu/amd_iommu_types.h #define FEATURE_GLXVAL_MASK	(0x03ULL << FEATURE_GLXVAL_SHIFT)