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 <linux/errno.h>
16 #include <asm/facility.h>
17
18 #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 */
23 #define CPU_MF_INT_CF_MTDA (1 << 15) /* loss of MT ctr. data alert */
24 #define CPU_MF_INT_CF_CACA (1 << 7) /* counter auth. change alert */
25 #define CPU_MF_INT_CF_LCDA (1 << 6) /* loss of counter data alert */
26 #define CPU_MF_INT_CF_MASK (CPU_MF_INT_CF_MTDA|CPU_MF_INT_CF_CACA| \
27 CPU_MF_INT_CF_LCDA)
28 #define CPU_MF_INT_SF_MASK (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE| \
29 CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA| \
30 CPU_MF_INT_SF_LSDA)
31
32 /* CPU measurement facility support */
cpum_cf_avail(void)33 static inline int cpum_cf_avail(void)
34 {
35 return MACHINE_HAS_LPP && test_facility(67);
36 }
37
cpum_sf_avail(void)38 static inline int cpum_sf_avail(void)
39 {
40 return MACHINE_HAS_LPP && test_facility(68);
41 }
42
43
44 struct cpumf_ctr_info {
45 u16 cfvn;
46 u16 auth_ctl;
47 u16 enable_ctl;
48 u16 act_ctl;
49 u16 max_cpu;
50 u16 csvn;
51 u16 max_cg;
52 u16 reserved1;
53 u32 reserved2[12];
54 } __packed;
55
56 /* QUERY SAMPLING INFORMATION block */
57 struct hws_qsi_info_block { /* Bit(s) */
58 unsigned int b0_13:14; /* 0-13: zeros */
59 unsigned int as:1; /* 14: basic-sampling authorization */
60 unsigned int ad:1; /* 15: diag-sampling authorization */
61 unsigned int b16_21:6; /* 16-21: zeros */
62 unsigned int es:1; /* 22: basic-sampling enable control */
63 unsigned int ed:1; /* 23: diag-sampling enable control */
64 unsigned int b24_29:6; /* 24-29: zeros */
65 unsigned int cs:1; /* 30: basic-sampling activation control */
66 unsigned int cd:1; /* 31: diag-sampling activation control */
67 unsigned int bsdes:16; /* 4-5: size of basic sampling entry */
68 unsigned int dsdes:16; /* 6-7: size of diagnostic sampling entry */
69 unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */
70 unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/
71 unsigned long tear; /* 24-31: TEAR contents */
72 unsigned long dear; /* 32-39: DEAR contents */
73 unsigned int rsvrd0; /* 40-43: reserved */
74 unsigned int cpu_speed; /* 44-47: CPU speed */
75 unsigned long long rsvrd1; /* 48-55: reserved */
76 unsigned long long rsvrd2; /* 56-63: reserved */
77 } __packed;
78
79 /* SET SAMPLING CONTROLS request block */
80 struct hws_lsctl_request_block {
81 unsigned int s:1; /* 0: maximum buffer indicator */
82 unsigned int h:1; /* 1: part. level reserved for VM use*/
83 unsigned long long b2_53:52;/* 2-53: zeros */
84 unsigned int es:1; /* 54: basic-sampling enable control */
85 unsigned int ed:1; /* 55: diag-sampling enable control */
86 unsigned int b56_61:6; /* 56-61: - zeros */
87 unsigned int cs:1; /* 62: basic-sampling activation control */
88 unsigned int cd:1; /* 63: diag-sampling activation control */
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 struct hws_basic_entry {
100 unsigned int def:16; /* 0-15 Data Entry Format */
101 unsigned int R:4; /* 16-19 reserved */
102 unsigned int U:4; /* 20-23 Number of unique instruct. */
103 unsigned int z:2; /* zeros */
104 unsigned int T:1; /* 26 PSW DAT mode */
105 unsigned int W:1; /* 27 PSW wait state */
106 unsigned int P:1; /* 28 PSW Problem state */
107 unsigned int AS:2; /* 29-30 PSW address-space control */
108 unsigned int I:1; /* 31 entry valid or invalid */
109 unsigned int CL:2; /* 32-33 Configuration Level */
110 unsigned int:14;
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
117 struct hws_diag_entry {
118 unsigned int def:16; /* 0-15 Data Entry Format */
119 unsigned int R:15; /* 16-19 and 20-30 reserved */
120 unsigned int I:1; /* 31 entry valid or invalid */
121 u8 data[]; /* Machine-dependent sample data */
122 } __packed;
123
124 struct hws_combined_entry {
125 struct hws_basic_entry basic; /* Basic-sampling data entry */
126 struct hws_diag_entry diag; /* Diagnostic-sampling data entry */
127 } __packed;
128
129 struct hws_trailer_entry {
130 union {
131 struct {
132 unsigned int f:1; /* 0 - Block Full Indicator */
133 unsigned int a:1; /* 1 - Alert request control */
134 unsigned int t:1; /* 2 - Timestamp format */
135 unsigned int :29; /* 3 - 31: Reserved */
136 unsigned int bsdes:16; /* 32-47: size of basic SDE */
137 unsigned int dsdes:16; /* 48-63: size of diagnostic SDE */
138 };
139 unsigned long long flags; /* 0 - 63: All indicators */
140 };
141 unsigned long long overflow; /* 64 - sample Overflow count */
142 unsigned char timestamp[16]; /* 16 - 31 timestamp */
143 unsigned long long reserved1; /* 32 -Reserved */
144 unsigned long long reserved2; /* */
145 unsigned long long progusage1; /* 48 - reserved for programming use */
146 unsigned long long progusage2; /* */
147 } __packed;
148
149 /* Query counter information */
qctri(struct cpumf_ctr_info * info)150 static inline int qctri(struct cpumf_ctr_info *info)
151 {
152 int rc = -EINVAL;
153
154 asm volatile (
155 "0: .insn s,0xb28e0000,%1\n"
156 "1: lhi %0,0\n"
157 "2:\n"
158 EX_TABLE(1b, 2b)
159 : "+d" (rc), "=Q" (*info));
160 return rc;
161 }
162
163 /* Load CPU-counter-set controls */
lcctl(u64 ctl)164 static inline int lcctl(u64 ctl)
165 {
166 int cc;
167
168 asm volatile (
169 " .insn s,0xb2840000,%1\n"
170 " ipm %0\n"
171 " srl %0,28\n"
172 : "=d" (cc) : "m" (ctl) : "cc");
173 return cc;
174 }
175
176 /* Extract CPU counter */
__ecctr(u64 ctr,u64 * content)177 static inline int __ecctr(u64 ctr, u64 *content)
178 {
179 u64 _content;
180 int cc;
181
182 asm volatile (
183 " .insn rre,0xb2e40000,%0,%2\n"
184 " ipm %1\n"
185 " srl %1,28\n"
186 : "=d" (_content), "=d" (cc) : "d" (ctr) : "cc");
187 *content = _content;
188 return cc;
189 }
190
191 /* Extract CPU counter */
ecctr(u64 ctr,u64 * val)192 static inline int ecctr(u64 ctr, u64 *val)
193 {
194 u64 content;
195 int cc;
196
197 cc = __ecctr(ctr, &content);
198 if (!cc)
199 *val = content;
200 return cc;
201 }
202
203 /* Store CPU counter multiple for the MT utilization counter set */
stcctm5(u64 num,u64 * val)204 static inline int stcctm5(u64 num, u64 *val)
205 {
206 int cc;
207
208 asm volatile (
209 " .insn rsy,0xeb0000000017,%2,5,%1\n"
210 " ipm %0\n"
211 " srl %0,28\n"
212 : "=d" (cc)
213 : "Q" (*val), "d" (num)
214 : "cc", "memory");
215 return cc;
216 }
217
218 /* Query sampling information */
qsi(struct hws_qsi_info_block * info)219 static inline int qsi(struct hws_qsi_info_block *info)
220 {
221 int cc = 1;
222
223 asm volatile(
224 "0: .insn s,0xb2860000,%1\n"
225 "1: lhi %0,0\n"
226 "2:\n"
227 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
228 : "+d" (cc), "+Q" (*info));
229 return cc ? -EINVAL : 0;
230 }
231
232 /* Load sampling controls */
lsctl(struct hws_lsctl_request_block * req)233 static inline int lsctl(struct hws_lsctl_request_block *req)
234 {
235 int cc;
236
237 cc = 1;
238 asm volatile(
239 "0: .insn s,0xb2870000,0(%1)\n"
240 "1: ipm %0\n"
241 " srl %0,28\n"
242 "2:\n"
243 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
244 : "+d" (cc), "+a" (req)
245 : "m" (*req)
246 : "cc", "memory");
247
248 return cc ? -EINVAL : 0;
249 }
250
251 /* Sampling control helper functions */
252
253 #include <linux/time.h>
254
freq_to_sample_rate(struct hws_qsi_info_block * qsi,unsigned long freq)255 static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi,
256 unsigned long freq)
257 {
258 return (USEC_PER_SEC / freq) * qsi->cpu_speed;
259 }
260
sample_rate_to_freq(struct hws_qsi_info_block * qsi,unsigned long rate)261 static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
262 unsigned long rate)
263 {
264 return USEC_PER_SEC * qsi->cpu_speed / rate;
265 }
266
267 #define SDB_TE_ALERT_REQ_MASK 0x4000000000000000UL
268 #define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
269
270 /* Return TOD timestamp contained in an trailer entry */
trailer_timestamp(struct hws_trailer_entry * te)271 static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
272 {
273 /* TOD in STCKE format */
274 if (te->t)
275 return *((unsigned long long *) &te->timestamp[1]);
276
277 /* TOD in STCK format */
278 return *((unsigned long long *) &te->timestamp[0]);
279 }
280
281 /* Return pointer to trailer entry of an sample data block */
trailer_entry_ptr(unsigned long v)282 static inline unsigned long *trailer_entry_ptr(unsigned long v)
283 {
284 void *ret;
285
286 ret = (void *) v;
287 ret += PAGE_SIZE;
288 ret -= sizeof(struct hws_trailer_entry);
289
290 return (unsigned long *) ret;
291 }
292
293 /* Return if the entry in the sample data block table (sdbt)
294 * is a link to the next sdbt */
is_link_entry(unsigned long * s)295 static inline int is_link_entry(unsigned long *s)
296 {
297 return *s & 0x1ul ? 1 : 0;
298 }
299
300 /* Return pointer to the linked sdbt */
get_next_sdbt(unsigned long * s)301 static inline unsigned long *get_next_sdbt(unsigned long *s)
302 {
303 return (unsigned long *) (*s & ~0x1ul);
304 }
305 #endif /* _ASM_S390_CPU_MF_H */
306