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_CACA (1 << 7) /* counter auth. change alert */
24 #define CPU_MF_INT_CF_LCDA (1 << 6) /* loss of counter data alert */
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 */
cpum_cf_avail(void)31 static inline int cpum_cf_avail(void)
32 {
33 return MACHINE_HAS_LPP && test_facility(67);
34 }
35
cpum_sf_avail(void)36 static inline int cpum_sf_avail(void)
37 {
38 return MACHINE_HAS_LPP && test_facility(68);
39 }
40
41
42 struct 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 SAMPLING INFORMATION block */
55 struct hws_qsi_info_block { /* Bit(s) */
56 unsigned int b0_13:14; /* 0-13: zeros */
57 unsigned int as:1; /* 14: basic-sampling authorization */
58 unsigned int ad:1; /* 15: diag-sampling authorization */
59 unsigned int b16_21:6; /* 16-21: zeros */
60 unsigned int es:1; /* 22: basic-sampling enable control */
61 unsigned int ed:1; /* 23: diag-sampling enable control */
62 unsigned int b24_29:6; /* 24-29: zeros */
63 unsigned int cs:1; /* 30: basic-sampling activation control */
64 unsigned int cd:1; /* 31: diag-sampling activation control */
65 unsigned int bsdes:16; /* 4-5: size of basic sampling entry */
66 unsigned int dsdes:16; /* 6-7: size of diagnostic sampling entry */
67 unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */
68 unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/
69 unsigned long tear; /* 24-31: TEAR contents */
70 unsigned long dear; /* 32-39: DEAR contents */
71 unsigned int rsvrd0; /* 40-43: reserved */
72 unsigned int cpu_speed; /* 44-47: CPU speed */
73 unsigned long long rsvrd1; /* 48-55: reserved */
74 unsigned long long rsvrd2; /* 56-63: reserved */
75 } __packed;
76
77 /* SET SAMPLING CONTROLS request block */
78 struct hws_lsctl_request_block {
79 unsigned int s:1; /* 0: maximum buffer indicator */
80 unsigned int h:1; /* 1: part. level reserved for VM use*/
81 unsigned long long b2_53:52;/* 2-53: zeros */
82 unsigned int es:1; /* 54: basic-sampling enable control */
83 unsigned int ed:1; /* 55: diag-sampling enable control */
84 unsigned int b56_61:6; /* 56-61: - zeros */
85 unsigned int cs:1; /* 62: basic-sampling activation control */
86 unsigned int cd:1; /* 63: diag-sampling activation control */
87 unsigned long interval; /* 8-15: sampling interval */
88 unsigned long tear; /* 16-23: TEAR contents */
89 unsigned long dear; /* 24-31: DEAR contents */
90 /* 32-63: */
91 unsigned long rsvrd1; /* reserved */
92 unsigned long rsvrd2; /* reserved */
93 unsigned long rsvrd3; /* reserved */
94 unsigned long rsvrd4; /* reserved */
95 } __packed;
96
97 struct hws_basic_entry {
98 unsigned int def:16; /* 0-15 Data Entry Format */
99 unsigned int R:4; /* 16-19 reserved */
100 unsigned int U:4; /* 20-23 Number of unique instruct. */
101 unsigned int z:2; /* zeros */
102 unsigned int T:1; /* 26 PSW DAT mode */
103 unsigned int W:1; /* 27 PSW wait state */
104 unsigned int P:1; /* 28 PSW Problem state */
105 unsigned int AS:2; /* 29-30 PSW address-space control */
106 unsigned int I:1; /* 31 entry valid or invalid */
107 unsigned int:16;
108 unsigned int prim_asn:16; /* primary ASN */
109 unsigned long long ia; /* Instruction Address */
110 unsigned long long gpp; /* Guest Program Parameter */
111 unsigned long long hpp; /* Host Program Parameter */
112 } __packed;
113
114 struct hws_diag_entry {
115 unsigned int def:16; /* 0-15 Data Entry Format */
116 unsigned int R:15; /* 16-19 and 20-30 reserved */
117 unsigned int I:1; /* 31 entry valid or invalid */
118 u8 data[]; /* Machine-dependent sample data */
119 } __packed;
120
121 struct hws_combined_entry {
122 struct hws_basic_entry basic; /* Basic-sampling data entry */
123 struct hws_diag_entry diag; /* Diagnostic-sampling data entry */
124 } __packed;
125
126 struct hws_trailer_entry {
127 union {
128 struct {
129 unsigned int f:1; /* 0 - Block Full Indicator */
130 unsigned int a:1; /* 1 - Alert request control */
131 unsigned int t:1; /* 2 - Timestamp format */
132 unsigned int :29; /* 3 - 31: Reserved */
133 unsigned int bsdes:16; /* 32-47: size of basic SDE */
134 unsigned int dsdes:16; /* 48-63: size of diagnostic SDE */
135 };
136 unsigned long long flags; /* 0 - 63: All indicators */
137 };
138 unsigned long long overflow; /* 64 - sample Overflow count */
139 unsigned char timestamp[16]; /* 16 - 31 timestamp */
140 unsigned long long reserved1; /* 32 -Reserved */
141 unsigned long long reserved2; /* */
142 unsigned long long progusage1; /* 48 - reserved for programming use */
143 unsigned long long progusage2; /* */
144 } __packed;
145
146 /* Query counter information */
qctri(struct cpumf_ctr_info * info)147 static inline int qctri(struct cpumf_ctr_info *info)
148 {
149 int rc = -EINVAL;
150
151 asm volatile (
152 "0: .insn s,0xb28e0000,%1\n"
153 "1: lhi %0,0\n"
154 "2:\n"
155 EX_TABLE(1b, 2b)
156 : "+d" (rc), "=Q" (*info));
157 return rc;
158 }
159
160 /* Load CPU-counter-set controls */
lcctl(u64 ctl)161 static inline int lcctl(u64 ctl)
162 {
163 int cc;
164
165 asm volatile (
166 " .insn s,0xb2840000,%1\n"
167 " ipm %0\n"
168 " srl %0,28\n"
169 : "=d" (cc) : "m" (ctl) : "cc");
170 return cc;
171 }
172
173 /* Extract CPU counter */
ecctr(u64 ctr,u64 * val)174 static inline int ecctr(u64 ctr, u64 *val)
175 {
176 register u64 content asm("4") = 0;
177 int cc;
178
179 asm volatile (
180 " .insn rre,0xb2e40000,%0,%2\n"
181 " ipm %1\n"
182 " srl %1,28\n"
183 : "=d" (content), "=d" (cc) : "d" (ctr) : "cc");
184 if (!cc)
185 *val = content;
186 return cc;
187 }
188
189 /* Store CPU counter multiple for the MT utilization counter set */
stcctm5(u64 num,u64 * val)190 static inline int stcctm5(u64 num, u64 *val)
191 {
192 typedef struct { u64 _[num]; } addrtype;
193 int cc;
194
195 asm volatile (
196 " .insn rsy,0xeb0000000017,%2,5,%1\n"
197 " ipm %0\n"
198 " srl %0,28\n"
199 : "=d" (cc), "=Q" (*(addrtype *) val) : "d" (num) : "cc");
200 return cc;
201 }
202
203 /* Query sampling information */
qsi(struct hws_qsi_info_block * info)204 static inline int qsi(struct hws_qsi_info_block *info)
205 {
206 int cc;
207 cc = 1;
208
209 asm volatile(
210 "0: .insn s,0xb2860000,0(%1)\n"
211 "1: lhi %0,0\n"
212 "2:\n"
213 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
214 : "=d" (cc), "+a" (info)
215 : "m" (*info)
216 : "cc", "memory");
217
218 return cc ? -EINVAL : 0;
219 }
220
221 /* Load sampling controls */
lsctl(struct hws_lsctl_request_block * req)222 static inline int lsctl(struct hws_lsctl_request_block *req)
223 {
224 int cc;
225
226 cc = 1;
227 asm volatile(
228 "0: .insn s,0xb2870000,0(%1)\n"
229 "1: ipm %0\n"
230 " srl %0,28\n"
231 "2:\n"
232 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
233 : "+d" (cc), "+a" (req)
234 : "m" (*req)
235 : "cc", "memory");
236
237 return cc ? -EINVAL : 0;
238 }
239
240 /* Sampling control helper functions */
241
242 #include <linux/time.h>
243
freq_to_sample_rate(struct hws_qsi_info_block * qsi,unsigned long freq)244 static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi,
245 unsigned long freq)
246 {
247 return (USEC_PER_SEC / freq) * qsi->cpu_speed;
248 }
249
sample_rate_to_freq(struct hws_qsi_info_block * qsi,unsigned long rate)250 static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
251 unsigned long rate)
252 {
253 return USEC_PER_SEC * qsi->cpu_speed / rate;
254 }
255
256 #define SDB_TE_ALERT_REQ_MASK 0x4000000000000000UL
257 #define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
258
259 /* Return TOD timestamp contained in an trailer entry */
trailer_timestamp(struct hws_trailer_entry * te)260 static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
261 {
262 /* TOD in STCKE format */
263 if (te->t)
264 return *((unsigned long long *) &te->timestamp[1]);
265
266 /* TOD in STCK format */
267 return *((unsigned long long *) &te->timestamp[0]);
268 }
269
270 /* Return pointer to trailer entry of an sample data block */
trailer_entry_ptr(unsigned long v)271 static inline unsigned long *trailer_entry_ptr(unsigned long v)
272 {
273 void *ret;
274
275 ret = (void *) v;
276 ret += PAGE_SIZE;
277 ret -= sizeof(struct hws_trailer_entry);
278
279 return (unsigned long *) ret;
280 }
281
282 /* Return if the entry in the sample data block table (sdbt)
283 * is a link to the next sdbt */
is_link_entry(unsigned long * s)284 static inline int is_link_entry(unsigned long *s)
285 {
286 return *s & 0x1ul ? 1 : 0;
287 }
288
289 /* Return pointer to the linked sdbt */
get_next_sdbt(unsigned long * s)290 static inline unsigned long *get_next_sdbt(unsigned long *s)
291 {
292 return (unsigned long *) (*s & ~0x1ul);
293 }
294 #endif /* _ASM_S390_CPU_MF_H */
295