xref: /openbmc/linux/arch/s390/include/asm/cpu_mf.h (revision 0edbfea5)
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 */
31 static inline int cpum_cf_avail(void)
32 {
33 	return MACHINE_HAS_LPP && test_facility(67);
34 }
35 
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:14;	    /* 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 long long:61;	/* 3 - 63: Reserved	      */
133 		};
134 		unsigned long long flags;	/* 0 - 63: All indicators     */
135 	};
136 	unsigned long long overflow;	 /* 64 - sample Overflow count	      */
137 	unsigned char timestamp[16];	 /* 16 - 31 timestamp		      */
138 	unsigned long long reserved1;	 /* 32 -Reserved		      */
139 	unsigned long long reserved2;	 /*				      */
140 	unsigned long long progusage1;	 /* 48 - reserved for programming use */
141 	unsigned long long progusage2;	 /*				      */
142 } __packed;
143 
144 /* Query counter information */
145 static inline int qctri(struct cpumf_ctr_info *info)
146 {
147 	int rc = -EINVAL;
148 
149 	asm volatile (
150 		"0:	.insn	s,0xb28e0000,%1\n"
151 		"1:	lhi	%0,0\n"
152 		"2:\n"
153 		EX_TABLE(1b, 2b)
154 		: "+d" (rc), "=Q" (*info));
155 	return rc;
156 }
157 
158 /* Load CPU-counter-set controls */
159 static inline int lcctl(u64 ctl)
160 {
161 	int cc;
162 
163 	asm volatile (
164 		"	.insn	s,0xb2840000,%1\n"
165 		"	ipm	%0\n"
166 		"	srl	%0,28\n"
167 		: "=d" (cc) : "m" (ctl) : "cc");
168 	return cc;
169 }
170 
171 /* Extract CPU counter */
172 static inline int ecctr(u64 ctr, u64 *val)
173 {
174 	register u64 content asm("4") = 0;
175 	int cc;
176 
177 	asm volatile (
178 		"	.insn	rre,0xb2e40000,%0,%2\n"
179 		"	ipm	%1\n"
180 		"	srl	%1,28\n"
181 		: "=d" (content), "=d" (cc) : "d" (ctr) : "cc");
182 	if (!cc)
183 		*val = content;
184 	return cc;
185 }
186 
187 /* Store CPU counter multiple for the MT utilization counter set */
188 static inline int stcctm5(u64 num, u64 *val)
189 {
190 	typedef struct { u64 _[num]; } addrtype;
191 	int cc;
192 
193 	asm volatile (
194 		"	.insn	rsy,0xeb0000000017,%2,5,%1\n"
195 		"	ipm	%0\n"
196 		"	srl	%0,28\n"
197 		: "=d" (cc), "=Q" (*(addrtype *) val)  : "d" (num) : "cc");
198 	return cc;
199 }
200 
201 /* Query sampling information */
202 static inline int qsi(struct hws_qsi_info_block *info)
203 {
204 	int cc;
205 	cc = 1;
206 
207 	asm volatile(
208 		"0:	.insn	s,0xb2860000,0(%1)\n"
209 		"1:	lhi	%0,0\n"
210 		"2:\n"
211 		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
212 		: "=d" (cc), "+a" (info)
213 		: "m" (*info)
214 		: "cc", "memory");
215 
216 	return cc ? -EINVAL : 0;
217 }
218 
219 /* Load sampling controls */
220 static inline int lsctl(struct hws_lsctl_request_block *req)
221 {
222 	int cc;
223 
224 	cc = 1;
225 	asm volatile(
226 		"0:	.insn	s,0xb2870000,0(%1)\n"
227 		"1:	ipm	%0\n"
228 		"	srl	%0,28\n"
229 		"2:\n"
230 		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
231 		: "+d" (cc), "+a" (req)
232 		: "m" (*req)
233 		: "cc", "memory");
234 
235 	return cc ? -EINVAL : 0;
236 }
237 
238 /* Sampling control helper functions */
239 
240 #include <linux/time.h>
241 
242 static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi,
243 						unsigned long freq)
244 {
245 	return (USEC_PER_SEC / freq) * qsi->cpu_speed;
246 }
247 
248 static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
249 						unsigned long rate)
250 {
251 	return USEC_PER_SEC * qsi->cpu_speed / rate;
252 }
253 
254 #define SDB_TE_ALERT_REQ_MASK	0x4000000000000000UL
255 #define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
256 
257 /* Return TOD timestamp contained in an trailer entry */
258 static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
259 {
260 	/* TOD in STCKE format */
261 	if (te->t)
262 		return *((unsigned long long *) &te->timestamp[1]);
263 
264 	/* TOD in STCK format */
265 	return *((unsigned long long *) &te->timestamp[0]);
266 }
267 
268 /* Return pointer to trailer entry of an sample data block */
269 static inline unsigned long *trailer_entry_ptr(unsigned long v)
270 {
271 	void *ret;
272 
273 	ret = (void *) v;
274 	ret += PAGE_SIZE;
275 	ret -= sizeof(struct hws_trailer_entry);
276 
277 	return (unsigned long *) ret;
278 }
279 
280 /* Return if the entry in the sample data block table (sdbt)
281  * is a link to the next sdbt */
282 static inline int is_link_entry(unsigned long *s)
283 {
284 	return *s & 0x1ul ? 1 : 0;
285 }
286 
287 /* Return pointer to the linked sdbt */
288 static inline unsigned long *get_next_sdbt(unsigned long *s)
289 {
290 	return (unsigned long *) (*s & ~0x1ul);
291 }
292 #endif /* _ASM_S390_CPU_MF_H */
293