1/*
2 * CPU-measurement facilities
3 *
4 *  Copyright IBM Corp. 2012
5 *  Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
6 *	       Jan Glauber <jang@linux.vnet.ibm.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License (version 2 only)
10 * as published by the Free Software Foundation.
11 */
12#ifndef _ASM_S390_CPU_MF_H
13#define _ASM_S390_CPU_MF_H
14
15#include <asm/facility.h>
16
17#define CPU_MF_INT_SF_IAE	(1 << 31)	/* invalid entry address */
18#define CPU_MF_INT_SF_ISE	(1 << 30)	/* incorrect SDBT entry */
19#define CPU_MF_INT_SF_PRA	(1 << 29)	/* program request alert */
20#define CPU_MF_INT_SF_SACA	(1 << 23)	/* sampler auth. change alert */
21#define CPU_MF_INT_SF_LSDA	(1 << 22)	/* loss of sample data alert */
22#define CPU_MF_INT_CF_CACA	(1 <<  7)	/* counter auth. change alert */
23#define CPU_MF_INT_CF_LCDA	(1 <<  6)	/* loss of counter data alert */
24
25#define CPU_MF_INT_CF_MASK	(CPU_MF_INT_CF_CACA|CPU_MF_INT_CF_LCDA)
26#define CPU_MF_INT_SF_MASK	(CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE|	\
27				 CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA|	\
28				 CPU_MF_INT_SF_LSDA)
29
30/* CPU measurement facility support */
31static inline int cpum_cf_avail(void)
32{
33	return MACHINE_HAS_SPP && test_facility(67);
34}
35
36static inline int cpum_sf_avail(void)
37{
38	return MACHINE_HAS_SPP && test_facility(68);
39}
40
41
42struct cpumf_ctr_info {
43	u16   cfvn;
44	u16   auth_ctl;
45	u16   enable_ctl;
46	u16   act_ctl;
47	u16   max_cpu;
48	u16   csvn;
49	u16   max_cg;
50	u16   reserved1;
51	u32   reserved2[12];
52} __packed;
53
54/* Query counter information */
55static inline int qctri(struct cpumf_ctr_info *info)
56{
57	int rc = -EINVAL;
58
59	asm volatile (
60		"0:	.insn	s,0xb28e0000,%1\n"
61		"1:	lhi	%0,0\n"
62		"2:\n"
63		EX_TABLE(1b, 2b)
64		: "+d" (rc), "=Q" (*info));
65	return rc;
66}
67
68/* Load CPU-counter-set controls */
69static inline int lcctl(u64 ctl)
70{
71	int cc;
72
73	asm volatile (
74		"	.insn	s,0xb2840000,%1\n"
75		"	ipm	%0\n"
76		"	srl	%0,28\n"
77		: "=d" (cc) : "m" (ctl) : "cc");
78	return cc;
79}
80
81/* Extract CPU counter */
82static inline int ecctr(u64 ctr, u64 *val)
83{
84	register u64 content asm("4") = 0;
85	int cc;
86
87	asm volatile (
88		"	.insn	rre,0xb2e40000,%0,%2\n"
89		"	ipm	%1\n"
90		"	srl	%1,28\n"
91		: "=d" (content), "=d" (cc) : "d" (ctr) : "cc");
92	if (!cc)
93		*val = content;
94	return cc;
95}
96
97#endif /* _ASM_S390_CPU_MF_H */
98