1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * CPU-measurement facilities
4 *
5 * Copyright IBM Corp. 2012, 2018
6 * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
7 * Jan Glauber <jang@linux.vnet.ibm.com>
8 */
9 #ifndef _ASM_S390_CPU_MF_H
10 #define _ASM_S390_CPU_MF_H
11
12 #include <linux/errno.h>
13 #include <asm/facility.h>
14
15 asm(".include \"asm/cpu_mf-insn.h\"\n");
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_MTDA (1 << 15) /* loss of MT ctr. 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_MTDA|CPU_MF_INT_CF_CACA| \
26 CPU_MF_INT_CF_LCDA)
27 #define CPU_MF_INT_SF_MASK (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE| \
28 CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA| \
29 CPU_MF_INT_SF_LSDA)
30
31 #define CPU_MF_SF_RIBM_NOTAV 0x1 /* Sampling unavailable */
32
33 /* CPU measurement facility support */
cpum_cf_avail(void)34 static inline int cpum_cf_avail(void)
35 {
36 return test_facility(40) && test_facility(67);
37 }
38
cpum_sf_avail(void)39 static inline int cpum_sf_avail(void)
40 {
41 return test_facility(40) && test_facility(68);
42 }
43
44
45 struct cpumf_ctr_info {
46 u16 cfvn;
47 u16 auth_ctl;
48 u16 enable_ctl;
49 u16 act_ctl;
50 u16 max_cpu;
51 u16 csvn;
52 u16 max_cg;
53 u16 reserved1;
54 u32 reserved2[12];
55 } __packed;
56
57 /* QUERY SAMPLING INFORMATION block */
58 struct hws_qsi_info_block { /* Bit(s) */
59 unsigned int b0_13:14; /* 0-13: zeros */
60 unsigned int as:1; /* 14: basic-sampling authorization */
61 unsigned int ad:1; /* 15: diag-sampling authorization */
62 unsigned int b16_21:6; /* 16-21: zeros */
63 unsigned int es:1; /* 22: basic-sampling enable control */
64 unsigned int ed:1; /* 23: diag-sampling enable control */
65 unsigned int b24_29:6; /* 24-29: zeros */
66 unsigned int cs:1; /* 30: basic-sampling activation control */
67 unsigned int cd:1; /* 31: diag-sampling activation control */
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 rsvrd0:24; /* 40-42: reserved */
75 unsigned int ribm:8; /* 43: Reserved by IBM */
76 unsigned int cpu_speed; /* 44-47: CPU speed */
77 unsigned long long rsvrd1; /* 48-55: reserved */
78 unsigned long long rsvrd2; /* 56-63: reserved */
79 } __packed;
80
81 /* SET SAMPLING CONTROLS request block */
82 struct hws_lsctl_request_block {
83 unsigned int s:1; /* 0: maximum buffer indicator */
84 unsigned int h:1; /* 1: part. level reserved for VM use*/
85 unsigned long long b2_53:52;/* 2-53: zeros */
86 unsigned int es:1; /* 54: basic-sampling enable control */
87 unsigned int ed:1; /* 55: diag-sampling enable control */
88 unsigned int b56_61:6; /* 56-61: - zeros */
89 unsigned int cs:1; /* 62: basic-sampling activation control */
90 unsigned int cd:1; /* 63: diag-sampling activation control */
91 unsigned long interval; /* 8-15: sampling interval */
92 unsigned long tear; /* 16-23: TEAR contents */
93 unsigned long dear; /* 24-31: DEAR contents */
94 /* 32-63: */
95 unsigned long rsvrd1; /* reserved */
96 unsigned long rsvrd2; /* reserved */
97 unsigned long rsvrd3; /* reserved */
98 unsigned long rsvrd4; /* reserved */
99 } __packed;
100
101 struct hws_basic_entry {
102 unsigned int def:16; /* 0-15 Data Entry Format */
103 unsigned int R:4; /* 16-19 reserved */
104 unsigned int U:4; /* 20-23 Number of unique instruct. */
105 unsigned int z:2; /* zeros */
106 unsigned int T:1; /* 26 PSW DAT mode */
107 unsigned int W:1; /* 27 PSW wait state */
108 unsigned int P:1; /* 28 PSW Problem state */
109 unsigned int AS:2; /* 29-30 PSW address-space control */
110 unsigned int I:1; /* 31 entry valid or invalid */
111 unsigned int CL:2; /* 32-33 Configuration Level */
112 unsigned int:14;
113 unsigned int prim_asn:16; /* primary ASN */
114 unsigned long long ia; /* Instruction Address */
115 unsigned long long gpp; /* Guest Program Parameter */
116 unsigned long long hpp; /* Host Program Parameter */
117 } __packed;
118
119 struct hws_diag_entry {
120 unsigned int def:16; /* 0-15 Data Entry Format */
121 unsigned int R:15; /* 16-19 and 20-30 reserved */
122 unsigned int I:1; /* 31 entry valid or invalid */
123 u8 data[]; /* Machine-dependent sample data */
124 } __packed;
125
126 struct hws_combined_entry {
127 struct hws_basic_entry basic; /* Basic-sampling data entry */
128 struct hws_diag_entry diag; /* Diagnostic-sampling data entry */
129 } __packed;
130
131 struct hws_trailer_entry {
132 union {
133 struct {
134 unsigned int f:1; /* 0 - Block Full Indicator */
135 unsigned int a:1; /* 1 - Alert request control */
136 unsigned int t:1; /* 2 - Timestamp format */
137 unsigned int :29; /* 3 - 31: Reserved */
138 unsigned int bsdes:16; /* 32-47: size of basic SDE */
139 unsigned int dsdes:16; /* 48-63: size of diagnostic SDE */
140 };
141 unsigned long long flags; /* 0 - 63: All indicators */
142 };
143 unsigned long long overflow; /* 64 - sample Overflow count */
144 unsigned char timestamp[16]; /* 16 - 31 timestamp */
145 unsigned long long reserved1; /* 32 -Reserved */
146 unsigned long long reserved2; /* */
147 union { /* 48 - reserved for programming use */
148 struct {
149 unsigned int clock_base:1; /* in progusage2 */
150 unsigned long long progusage1:63;
151 unsigned long long progusage2;
152 };
153 unsigned long long progusage[2];
154 };
155 } __packed;
156
157 /* Load program parameter */
lpp(void * pp)158 static inline void lpp(void *pp)
159 {
160 asm volatile(".insn s,0xb2800000,0(%0)\n":: "a" (pp) : "memory");
161 }
162
163 /* Query counter information */
qctri(struct cpumf_ctr_info * info)164 static inline int qctri(struct cpumf_ctr_info *info)
165 {
166 int rc = -EINVAL;
167
168 asm volatile (
169 "0: .insn s,0xb28e0000,%1\n"
170 "1: lhi %0,0\n"
171 "2:\n"
172 EX_TABLE(1b, 2b)
173 : "+d" (rc), "=Q" (*info));
174 return rc;
175 }
176
177 /* Load CPU-counter-set controls */
lcctl(u64 ctl)178 static inline int lcctl(u64 ctl)
179 {
180 int cc;
181
182 asm volatile (
183 " .insn s,0xb2840000,%1\n"
184 " ipm %0\n"
185 " srl %0,28\n"
186 : "=d" (cc) : "Q" (ctl) : "cc");
187 return cc;
188 }
189
190 /* Extract CPU counter */
__ecctr(u64 ctr,u64 * content)191 static inline int __ecctr(u64 ctr, u64 *content)
192 {
193 u64 _content;
194 int cc;
195
196 asm volatile (
197 " .insn rre,0xb2e40000,%0,%2\n"
198 " ipm %1\n"
199 " srl %1,28\n"
200 : "=d" (_content), "=d" (cc) : "d" (ctr) : "cc");
201 *content = _content;
202 return cc;
203 }
204
205 /* Extract CPU counter */
ecctr(u64 ctr,u64 * val)206 static inline int ecctr(u64 ctr, u64 *val)
207 {
208 u64 content;
209 int cc;
210
211 cc = __ecctr(ctr, &content);
212 if (!cc)
213 *val = content;
214 return cc;
215 }
216
217 /* Store CPU counter multiple for a particular counter set */
218 enum stcctm_ctr_set {
219 EXTENDED = 0,
220 BASIC = 1,
221 PROBLEM_STATE = 2,
222 CRYPTO_ACTIVITY = 3,
223 MT_DIAG = 5,
224 MT_DIAG_CLEARING = 9, /* clears loss-of-MT-ctr-data alert */
225 };
226
stcctm(enum stcctm_ctr_set set,u64 range,u64 * dest)227 static __always_inline int stcctm(enum stcctm_ctr_set set, u64 range, u64 *dest)
228 {
229 int cc;
230
231 asm volatile (
232 " STCCTM %2,%3,%1\n"
233 " ipm %0\n"
234 " srl %0,28\n"
235 : "=d" (cc)
236 : "Q" (*dest), "d" (range), "i" (set)
237 : "cc", "memory");
238 return cc;
239 }
240
241 /* Query sampling information */
qsi(struct hws_qsi_info_block * info)242 static inline int qsi(struct hws_qsi_info_block *info)
243 {
244 int cc = 1;
245
246 asm volatile(
247 "0: .insn s,0xb2860000,%1\n"
248 "1: lhi %0,0\n"
249 "2:\n"
250 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
251 : "+d" (cc), "+Q" (*info));
252 return cc ? -EINVAL : 0;
253 }
254
255 /* Load sampling controls */
lsctl(struct hws_lsctl_request_block * req)256 static inline int lsctl(struct hws_lsctl_request_block *req)
257 {
258 int cc;
259
260 cc = 1;
261 asm volatile(
262 "0: .insn s,0xb2870000,0(%1)\n"
263 "1: ipm %0\n"
264 " srl %0,28\n"
265 "2:\n"
266 EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
267 : "+d" (cc), "+a" (req)
268 : "m" (*req)
269 : "cc", "memory");
270
271 return cc ? -EINVAL : 0;
272 }
273
274 /* Sampling control helper functions */
275
276 #include <linux/time.h>
277
freq_to_sample_rate(struct hws_qsi_info_block * qsi,unsigned long freq)278 static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi,
279 unsigned long freq)
280 {
281 return (USEC_PER_SEC / freq) * qsi->cpu_speed;
282 }
283
sample_rate_to_freq(struct hws_qsi_info_block * qsi,unsigned long rate)284 static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
285 unsigned long rate)
286 {
287 return USEC_PER_SEC * qsi->cpu_speed / rate;
288 }
289
290 #define SDB_TE_ALERT_REQ_MASK 0x4000000000000000UL
291 #define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
292
293 /* Return TOD timestamp contained in an trailer entry */
trailer_timestamp(struct hws_trailer_entry * te)294 static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
295 {
296 /* TOD in STCKE format */
297 if (te->t)
298 return *((unsigned long long *) &te->timestamp[1]);
299
300 /* TOD in STCK format */
301 return *((unsigned long long *) &te->timestamp[0]);
302 }
303
304 /* Return pointer to trailer entry of an sample data block */
trailer_entry_ptr(unsigned long v)305 static inline unsigned long *trailer_entry_ptr(unsigned long v)
306 {
307 void *ret;
308
309 ret = (void *) v;
310 ret += PAGE_SIZE;
311 ret -= sizeof(struct hws_trailer_entry);
312
313 return (unsigned long *) ret;
314 }
315
316 /* Return true if the entry in the sample data block table (sdbt)
317 * is a link to the next sdbt */
is_link_entry(unsigned long * s)318 static inline int is_link_entry(unsigned long *s)
319 {
320 return *s & 0x1ul ? 1 : 0;
321 }
322
323 /* Return pointer to the linked sdbt */
get_next_sdbt(unsigned long * s)324 static inline unsigned long *get_next_sdbt(unsigned long *s)
325 {
326 return (unsigned long *) (*s & ~0x1ul);
327 }
328 #endif /* _ASM_S390_CPU_MF_H */
329