aboutsummaryrefslogtreecommitdiffstats
path: root/arch/s390/include/asm/cpu_mf.h
blob: 0d90cbeb89b43e6c4130f50812559ea7a302585d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * CPU-measurement facilities
 *
 *  Copyright IBM Corp. 2012, 2018
 *  Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
 *	       Jan Glauber <jang@linux.vnet.ibm.com>
 */
#ifndef _ASM_S390_CPU_MF_H
#define _ASM_S390_CPU_MF_H

#include <linux/errno.h>
#include <asm/facility.h>

asm(".include \"asm/cpu_mf-insn.h\"\n");

#define CPU_MF_INT_SF_IAE	(1 << 31)	/* invalid entry address */
#define CPU_MF_INT_SF_ISE	(1 << 30)	/* incorrect SDBT entry */
#define CPU_MF_INT_SF_PRA	(1 << 29)	/* program request alert */
#define CPU_MF_INT_SF_SACA	(1 << 23)	/* sampler auth. change alert */
#define CPU_MF_INT_SF_LSDA	(1 << 22)	/* loss of sample data alert */
#define CPU_MF_INT_CF_MTDA	(1 << 15)	/* loss of MT ctr. data alert */
#define CPU_MF_INT_CF_CACA	(1 <<  7)	/* counter auth. change alert */
#define CPU_MF_INT_CF_LCDA	(1 <<  6)	/* loss of counter data alert */
#define CPU_MF_INT_CF_MASK	(CPU_MF_INT_CF_MTDA|CPU_MF_INT_CF_CACA| \
				 CPU_MF_INT_CF_LCDA)
#define CPU_MF_INT_SF_MASK	(CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE|	\
				 CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA|	\
				 CPU_MF_INT_SF_LSDA)

#define CPU_MF_SF_RIBM_NOTAV	0x1		/* Sampling unavailable */

/* CPU measurement facility support */
static inline int cpum_cf_avail(void)
{
	return test_facility(40) && test_facility(67);
}

static inline int cpum_sf_avail(void)
{
	return test_facility(40) && test_facility(68);
}


struct cpumf_ctr_info {
	u16   cfvn;
	u16   auth_ctl;
	u16   enable_ctl;
	u16   act_ctl;
	u16   max_cpu;
	u16   csvn;
	u16   max_cg;
	u16   reserved1;
	u32   reserved2[12];
} __packed;

/* QUERY SAMPLING INFORMATION block */
struct hws_qsi_info_block {	    /* Bit(s) */
	unsigned int b0_13:14;	    /* 0-13: zeros			 */
	unsigned int as:1;	    /* 14: basic-sampling authorization	 */
	unsigned int ad:1;	    /* 15: diag-sampling authorization	 */
	unsigned int b16_21:6;	    /* 16-21: zeros			 */
	unsigned int es:1;	    /* 22: basic-sampling enable control */
	unsigned int ed:1;	    /* 23: diag-sampling enable control	 */
	unsigned int b24_29:6;	    /* 24-29: zeros			 */
	unsigned int cs:1;	    /* 30: basic-sampling activation control */
	unsigned int cd:1;	    /* 31: diag-sampling activation control */
	unsigned int bsdes:16;	    /* 4-5: size of basic sampling entry */
	unsigned int dsdes:16;	    /* 6-7: size of diagnostic sampling entry */
	unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */
	unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/
	unsigned long tear;	    /* 24-31: TEAR contents		 */
	unsigned long dear;	    /* 32-39: DEAR contents		 */
	unsigned int rsvrd0:24;	    /* 40-42: reserved			 */
	unsigned int ribm:8;	    /* 43: Reserved by IBM		 */
	unsigned int cpu_speed;     /* 44-47: CPU speed			 */
	unsigned long long rsvrd1;  /* 48-55: reserved			 */
	unsigned long long rsvrd2;  /* 56-63: reserved			 */
} __packed;

/* SET SAMPLING CONTROLS request block */
struct hws_lsctl_request_block {
	unsigned int s:1;	    /* 0: maximum buffer indicator	 */
	unsigned int h:1;	    /* 1: part. level reserved for VM use*/
	unsigned long long b2_53:52;/* 2-53: zeros			 */
	unsigned int es:1;	    /* 54: basic-sampling enable control */
	unsigned int ed:1;	    /* 55: diag-sampling enable control	 */
	unsigned int b56_61:6;	    /* 56-61: - zeros			 */
	unsigned int cs:1;	    /* 62: basic-sampling activation control */
	unsigned int cd:1;	    /* 63: diag-sampling activation control  */
	unsigned long interval;     /* 8-15: sampling interval		 */
	unsigned long tear;	    /* 16-23: TEAR contents		 */
	unsigned long dear;	    /* 24-31: DEAR contents		 */
	/* 32-63:							 */
	unsigned long rsvrd1;	    /* reserved				 */
	unsigned long rsvrd2;	    /* reserved				 */
	unsigned long rsvrd3;	    /* reserved				 */
	unsigned long rsvrd4;	    /* reserved				 */
} __packed;

struct hws_basic_entry {
	unsigned int def:16;	    /* 0-15  Data Entry Format		 */
	unsigned int R:4;	    /* 16-19 reserved			 */
	unsigned int U:4;	    /* 20-23 Number of unique instruct.  */
	unsigned int z:2;	    /* zeros				 */
	unsigned int T:1;	    /* 26 PSW DAT mode			 */
	unsigned int W:1;	    /* 27 PSW wait state		 */
	unsigned int P:1;	    /* 28 PSW Problem state		 */
	unsigned int AS:2;	    /* 29-30 PSW address-space control	 */
	unsigned int I:1;	    /* 31 entry valid or invalid	 */
	unsigned int CL:2;	    /* 32-33 Configuration Level	 */
	unsigned int:14;
	unsigned int prim_asn:16;   /* primary ASN			 */
	unsigned long long ia;	    /* Instruction Address		 */
	unsigned long long gpp;     /* Guest Program Parameter		 */
	unsigned long long hpp;     /* Host Program Parameter		 */
} __packed;

struct hws_diag_entry {
	unsigned int def:16;	    /* 0-15  Data Entry Format		 */
	unsigned int R:15;	    /* 16-19 and 20-30 reserved		 */
	unsigned int I:1;	    /* 31 entry valid or invalid	 */
	u8	     data[];	    /* Machine-dependent sample data	 */
} __packed;

struct hws_combined_entry {
	struct hws_basic_entry	basic;	/* Basic-sampling data entry */
	struct hws_diag_entry	diag;	/* Diagnostic-sampling data entry */
} __packed;

struct hws_trailer_entry {
	union {
		struct {
			unsigned int f:1;	/* 0 - Block Full Indicator   */
			unsigned int a:1;	/* 1 - Alert request control  */
			unsigned int t:1;	/* 2 - Timestamp format	      */
			unsigned int :29;	/* 3 - 31: Reserved	      */
			unsigned int bsdes:16;	/* 32-47: size of basic SDE   */
			unsigned int dsdes:16;	/* 48-63: size of diagnostic SDE */
		};
		unsigned long long flags;	/* 0 - 63: All indicators     */
	};
	unsigned long long overflow;	 /* 64 - sample Overflow count	      */
	unsigned char timestamp[16];	 /* 16 - 31 timestamp		      */
	unsigned long long reserved1;	 /* 32 -Reserved		      */
	unsigned long long reserved2;	 /*				      */
	union {				 /* 48 - reserved for programming use */
		struct {
			unsigned int clock_base:1; /* in progusage2 */
			unsigned long long progusage1:63;
			unsigned long long progusage2;
		};
		unsigned long long progusage[2];
	};
} __packed;

/* Load program parameter */
static inline void lpp(void *pp)
{
	asm volatile(".insn s,0xb2800000,0(%0)\n":: "a" (pp) : "memory");
}

/* Query counter information */
static inline int qctri(struct cpumf_ctr_info *info)
{
	int rc = -EINVAL;

	asm volatile (
		"0:	.insn	s,0xb28e0000,%1\n"
		"1:	lhi	%0,0\n"
		"2:\n"
		EX_TABLE(1b, 2b)
		: "+d" (rc), "=Q" (*info));
	return rc;
}

/* Load CPU-counter-set controls */
static inline int lcctl(u64 ctl)
{
	int cc;

	asm volatile (
		"	.insn	s,0xb2840000,%1\n"
		"	ipm	%0\n"
		"	srl	%0,28\n"
		: "=d" (cc) : "Q" (ctl) : "cc");
	return cc;
}

/* Extract CPU counter */
static inline int __ecctr(u64 ctr, u64 *content)
{
	u64 _content;
	int cc;

	asm volatile (
		"	.insn	rre,0xb2e40000,%0,%2\n"
		"	ipm	%1\n"
		"	srl	%1,28\n"
		: "=d" (_content), "=d" (cc) : "d" (ctr) : "cc");
	*content = _content;
	return cc;
}

/* Extract CPU counter */
static inline int ecctr(u64 ctr, u64 *val)
{
	u64 content;
	int cc;

	cc = __ecctr(ctr, &content);
	if (!cc)
		*val = content;
	return cc;
}

/* Store CPU counter multiple for a particular counter set */
enum stcctm_ctr_set {
	EXTENDED = 0,
	BASIC = 1,
	PROBLEM_STATE = 2,
	CRYPTO_ACTIVITY = 3,
	MT_DIAG = 5,
	MT_DIAG_CLEARING = 9,	/* clears loss-of-MT-ctr-data alert */
};

static __always_inline int stcctm(enum stcctm_ctr_set set, u64 range, u64 *dest)
{
	int cc;

	asm volatile (
		"	STCCTM	%2,%3,%1\n"
		"	ipm	%0\n"
		"	srl	%0,28\n"
		: "=d" (cc)
		: "Q" (*dest), "d" (range), "i" (set)
		: "cc", "memory");
	return cc;
}

/* Query sampling information */
static inline int qsi(struct hws_qsi_info_block *info)
{
	int cc = 1;

	asm volatile(
		"0:	.insn	s,0xb2860000,%1\n"
		"1:	lhi	%0,0\n"
		"2:\n"
		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
		: "+d" (cc), "+Q" (*info));
	return cc ? -EINVAL : 0;
}

/* Load sampling controls */
static inline int lsctl(struct hws_lsctl_request_block *req)
{
	int cc;

	cc = 1;
	asm volatile(
		"0:	.insn	s,0xb2870000,0(%1)\n"
		"1:	ipm	%0\n"
		"	srl	%0,28\n"
		"2:\n"
		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
		: "+d" (cc), "+a" (req)
		: "m" (*req)
		: "cc", "memory");

	return cc ? -EINVAL : 0;
}

/* Sampling control helper functions */

#include <linux/time.h>

static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi,
						unsigned long freq)
{
	return (USEC_PER_SEC / freq) * qsi->cpu_speed;
}

static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
						unsigned long rate)
{
	return USEC_PER_SEC * qsi->cpu_speed / rate;
}

#define SDB_TE_ALERT_REQ_MASK	0x4000000000000000UL
#define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL

/* Return TOD timestamp contained in an trailer entry */
static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
{
	/* TOD in STCKE format */
	if (te->t)
		return *((unsigned long long *) &te->timestamp[1]);

	/* TOD in STCK format */
	return *((unsigned long long *) &te->timestamp[0]);
}

/* Return pointer to trailer entry of an sample data block */
static inline unsigned long *trailer_entry_ptr(unsigned long v)
{
	void *ret;

	ret = (void *) v;
	ret += PAGE_SIZE;
	ret -= sizeof(struct hws_trailer_entry);

	return (unsigned long *) ret;
}

/* Return true if the entry in the sample data block table (sdbt)
 * is a link to the next sdbt */
static inline int is_link_entry(unsigned long *s)
{
	return *s & 0x1ul ? 1 : 0;
}

/* Return pointer to the linked sdbt */
static inline unsigned long *get_next_sdbt(unsigned long *s)
{
	return (unsigned long *) (*s & ~0x1ul);
}
#endif /* _ASM_S390_CPU_MF_H */

Privacy Policy