// SPDX-License-Identifier: GPL-2.0 /* * Copyright IBM Corp. 2023 */ #include <linux/export.h> #include <asm/facility.h> unsigned int stfle_size(void) { static unsigned int size; unsigned int r; u64 dummy; r = READ_ONCE(size); if (!r) { r = __stfle_asm(&dummy, 1) + 1; WRITE_ONCE(size, r); } return r; } EXPORT_SYMBOL(stfle_size);