1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright IBM Corp. 2023
 4 */
 5
 6#include <asm/facility.h>
 7
 8unsigned int stfle_size(void)
 9{
10	static unsigned int size;
11	unsigned int r;
12	u64 dummy;
13
14	r = READ_ONCE(size);
15	if (!r) {
16		r = __stfle_asm(&dummy, 1) + 1;
17		WRITE_ONCE(size, r);
18	}
19	return r;
20}
21EXPORT_SYMBOL(stfle_size);

1