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Hendrik Brueckner212188a2012-03-23 11:13:06 +01001/*
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 */
Jan Glauberb03d541a2012-03-23 11:13:05 +010012#ifndef _ASM_S390_CPU_MF_H
13#define _ASM_S390_CPU_MF_H
14
Li Zefancb16b912013-03-07 17:35:53 +080015#include <linux/errno.h>
Heiko Carstens1e3cab22012-03-30 09:40:55 +020016#include <asm/facility.h>
17
Jan Glauberb03d541a2012-03-23 11:13:05 +010018#define CPU_MF_INT_SF_IAE (1 << 31) /* invalid entry address */
19#define CPU_MF_INT_SF_ISE (1 << 30) /* incorrect SDBT entry */
20#define CPU_MF_INT_SF_PRA (1 << 29) /* program request alert */
21#define CPU_MF_INT_SF_SACA (1 << 23) /* sampler auth. change alert */
22#define CPU_MF_INT_SF_LSDA (1 << 22) /* loss of sample data alert */
Hendrik Brueckner212188a2012-03-23 11:13:06 +010023#define CPU_MF_INT_CF_CACA (1 << 7) /* counter auth. change alert */
24#define CPU_MF_INT_CF_LCDA (1 << 6) /* loss of counter data alert */
Jan Glaubere4b8b3f2012-07-31 10:52:05 +020025#define CPU_MF_INT_RI_HALTED (1 << 5) /* run-time instr. halted */
26#define CPU_MF_INT_RI_BUF_FULL (1 << 4) /* run-time instr. program
27 buffer full */
Jan Glauberb03d541a2012-03-23 11:13:05 +010028
Hendrik Brueckner212188a2012-03-23 11:13:06 +010029#define CPU_MF_INT_CF_MASK (CPU_MF_INT_CF_CACA|CPU_MF_INT_CF_LCDA)
30#define CPU_MF_INT_SF_MASK (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE| \
31 CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA| \
32 CPU_MF_INT_SF_LSDA)
Jan Glaubere4b8b3f2012-07-31 10:52:05 +020033#define CPU_MF_INT_RI_MASK (CPU_MF_INT_RI_HALTED|CPU_MF_INT_RI_BUF_FULL)
Hendrik Brueckner212188a2012-03-23 11:13:06 +010034
35/* CPU measurement facility support */
36static inline int cpum_cf_avail(void)
37{
Hendrik Brueckner23d18e82013-02-11 18:11:09 +010038 return MACHINE_HAS_LPP && test_facility(67);
Hendrik Brueckner212188a2012-03-23 11:13:06 +010039}
40
41static inline int cpum_sf_avail(void)
42{
Hendrik Brueckner23d18e82013-02-11 18:11:09 +010043 return MACHINE_HAS_LPP && test_facility(68);
Hendrik Brueckner212188a2012-03-23 11:13:06 +010044}
45
46
47struct cpumf_ctr_info {
48 u16 cfvn;
49 u16 auth_ctl;
50 u16 enable_ctl;
51 u16 act_ctl;
52 u16 max_cpu;
53 u16 csvn;
54 u16 max_cg;
55 u16 reserved1;
56 u32 reserved2[12];
57} __packed;
58
Hendrik Bruecknercf48ad82013-12-11 12:15:52 +010059/* QUERY SAMPLING INFORMATION block */
60struct hws_qsi_info_block { /* Bit(s) */
61 unsigned int b0_13:14; /* 0-13: zeros */
62 unsigned int as:1; /* 14: sampling authorisation control*/
63 unsigned int b15_21:7; /* 15-21: zeros */
64 unsigned int es:1; /* 22: sampling enable control */
65 unsigned int b23_29:7; /* 23-29: zeros */
66 unsigned int cs:1; /* 30: sampling activation control */
67 unsigned int:1; /* 31: reserved */
68 unsigned int bsdes:16; /* 4-5: size of basic sampling entry */
69 unsigned int dsdes:16; /* 6-7: size of diagnostic sampling entry */
70 unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */
71 unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/
72 unsigned long tear; /* 24-31: TEAR contents */
73 unsigned long dear; /* 32-39: DEAR contents */
74 unsigned int rsvrd0; /* 40-43: reserved */
75 unsigned int cpu_speed; /* 44-47: CPU speed */
76 unsigned long long rsvrd1; /* 48-55: reserved */
77 unsigned long long rsvrd2; /* 56-63: reserved */
78} __packed;
79
80/* SET SAMPLING CONTROLS request block */
81struct hws_lsctl_request_block {
82 unsigned int s:1; /* 0: maximum buffer indicator */
83 unsigned int h:1; /* 1: part. level reserved for VM use*/
84 unsigned long long b2_53:52;/* 2-53: zeros */
85 unsigned int es:1; /* 54: sampling enable control */
86 unsigned int b55_61:7; /* 55-61: - zeros */
87 unsigned int cs:1; /* 62: sampling activation control */
88 unsigned int b63:1; /* 63: zero */
89 unsigned long interval; /* 8-15: sampling interval */
90 unsigned long tear; /* 16-23: TEAR contents */
91 unsigned long dear; /* 24-31: DEAR contents */
92 /* 32-63: */
93 unsigned long rsvrd1; /* reserved */
94 unsigned long rsvrd2; /* reserved */
95 unsigned long rsvrd3; /* reserved */
96 unsigned long rsvrd4; /* reserved */
97} __packed;
98
99
100struct hws_data_entry {
101 unsigned int def:16; /* 0-15 Data Entry Format */
102 unsigned int R:4; /* 16-19 reserved */
103 unsigned int U:4; /* 20-23 Number of unique instruct. */
104 unsigned int z:2; /* zeros */
105 unsigned int T:1; /* 26 PSW DAT mode */
106 unsigned int W:1; /* 27 PSW wait state */
107 unsigned int P:1; /* 28 PSW Problem state */
108 unsigned int AS:2; /* 29-30 PSW address-space control */
109 unsigned int I:1; /* 31 entry valid or invalid */
110 unsigned int:16;
111 unsigned int prim_asn:16; /* primary ASN */
112 unsigned long long ia; /* Instruction Address */
113 unsigned long long gpp; /* Guest Program Parameter */
114 unsigned long long hpp; /* Host Program Parameter */
115} __packed;
116
117struct hws_trailer_entry {
Hendrik Bruecknerfcc77f52013-12-12 17:26:51 +0100118 union {
119 struct {
120 unsigned int f:1; /* 0 - Block Full Indicator */
121 unsigned int a:1; /* 1 - Alert request control */
122 unsigned int t:1; /* 2 - Timestamp format */
123 unsigned long long:61; /* 3 - 63: Reserved */
124 };
125 unsigned long long flags; /* 0 - 63: All indicators */
126 };
Hendrik Bruecknercf48ad82013-12-11 12:15:52 +0100127 unsigned long long overflow; /* 64 - sample Overflow count */
Hendrik Brueckner443d4be2013-12-12 17:38:50 +0100128 unsigned char timestamp[16]; /* 16 - 31 timestamp */
Hendrik Bruecknercf48ad82013-12-11 12:15:52 +0100129 unsigned long long reserved1; /* 32 -Reserved */
130 unsigned long long reserved2; /* */
131 unsigned long long progusage1; /* 48 - reserved for programming use */
132 unsigned long long progusage2; /* */
133} __packed;
134
Hendrik Brueckner212188a2012-03-23 11:13:06 +0100135/* Query counter information */
136static inline int qctri(struct cpumf_ctr_info *info)
137{
138 int rc = -EINVAL;
139
140 asm volatile (
141 "0: .insn s,0xb28e0000,%1\n"
142 "1: lhi %0,0\n"
143 "2:\n"
144 EX_TABLE(1b, 2b)
145 : "+d" (rc), "=Q" (*info));
146 return rc;
147}
148
149/* Load CPU-counter-set controls */
150static inline int lcctl(u64 ctl)
151{
152 int cc;
153
154 asm volatile (
155 " .insn s,0xb2840000,%1\n"
156 " ipm %0\n"
157 " srl %0,28\n"
158 : "=d" (cc) : "m" (ctl) : "cc");
159 return cc;
160}
161
162/* Extract CPU counter */
163static inline int ecctr(u64 ctr, u64 *val)
164{
165 register u64 content asm("4") = 0;
166 int cc;
167
168 asm volatile (
169 " .insn rre,0xb2e40000,%0,%2\n"
170 " ipm %1\n"
171 " srl %1,28\n"
172 : "=d" (content), "=d" (cc) : "d" (ctr) : "cc");
173 if (!cc)
174 *val = content;
175 return cc;
176}
177
Hendrik Bruecknercf48ad82013-12-11 12:15:52 +0100178/* Query sampling information */
179static inline int qsi(struct hws_qsi_info_block *info)
180{
181 int cc;
182 cc = 1;
183
184 asm volatile(
185 "0: .insn s,0xb2860000,0(%1)\n"
186 "1: lhi %0,0\n"
187 "2:\n"
188 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
189 : "=d" (cc), "+a" (info)
190 : "m" (*info)
191 : "cc", "memory");
192
193 return cc ? -EINVAL : 0;
194}
195
196/* Load sampling controls */
197static inline int lsctl(struct hws_lsctl_request_block *req)
198{
199 int cc;
200
201 cc = 1;
202 asm volatile(
203 "0: .insn s,0xb2870000,0(%1)\n"
204 "1: ipm %0\n"
205 " srl %0,28\n"
206 "2:\n"
207 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
208 : "+d" (cc), "+a" (req)
209 : "m" (*req)
210 : "cc", "memory");
211
212 return cc ? -EINVAL : 0;
213}
214
215/* Sampling control helper functions */
216
Hendrik Brueckner8c069ff2013-12-12 16:32:47 +0100217#include <linux/time.h>
218
219static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi,
220 unsigned long freq)
221{
222 return (USEC_PER_SEC / freq) * qsi->cpu_speed;
223}
224
225static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
226 unsigned long rate)
227{
228 return USEC_PER_SEC * qsi->cpu_speed / rate;
229}
230
Hendrik Bruecknercf48ad82013-12-11 12:15:52 +0100231#define SDB_TE_ALERT_REQ_MASK 0x4000000000000000UL
232#define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
233
Hendrik Brueckner443d4be2013-12-12 17:38:50 +0100234/* Return TOD timestamp contained in an trailer entry */
235static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
236{
237 /* TOD in STCKE format */
238 if (te->t)
239 return *((unsigned long long *) &te->timestamp[1]);
240
241 /* TOD in STCK format */
242 return *((unsigned long long *) &te->timestamp[0]);
243}
244
Hendrik Bruecknercf48ad82013-12-11 12:15:52 +0100245/* Return pointer to trailer entry of an sample data block */
246static inline unsigned long *trailer_entry_ptr(unsigned long v)
247{
248 void *ret;
249
250 ret = (void *) v;
251 ret += PAGE_SIZE;
252 ret -= sizeof(struct hws_trailer_entry);
253
254 return (unsigned long *) ret;
255}
256
257/* Return if the entry in the sample data block table (sdbt)
258 * is a link to the next sdbt */
259static inline int is_link_entry(unsigned long *s)
260{
261 return *s & 0x1ul ? 1 : 0;
262}
263
264/* Return pointer to the linked sdbt */
265static inline unsigned long *get_next_sdbt(unsigned long *s)
266{
267 return (unsigned long *) (*s & ~0x1ul);
268}
Hendrik Brueckner212188a2012-03-23 11:13:06 +0100269#endif /* _ASM_S390_CPU_MF_H */