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/asm-extable.h>
14#include <asm/facility.h>
15
16asm(".include \"asm/cpu_mf-insn.h\"\n");
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#define CPU_MF_SF_RIBM_NOTAV	0x1		/* Sampling unavailable */
33
34/* CPU measurement facility support */
35static inline int cpum_cf_avail(void)
36{
37	return test_facility(40) && test_facility(67);
38}
39
40static inline int cpum_sf_avail(void)
41{
42	return test_facility(40) && test_facility(68);
43}
44
45struct 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 */
58struct 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 */
82struct 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
101struct 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 H:1;	    /* 34 Host Indicator		 */
113	unsigned int LS:1;	    /* 35 Limited Sampling		 */
114	unsigned int:12;
115	unsigned int prim_asn:16;   /* primary ASN			 */
116	unsigned long long ia;	    /* Instruction Address		 */
117	unsigned long long gpp;     /* Guest Program Parameter		 */
118	unsigned long long hpp;     /* Host Program Parameter		 */
119} __packed;
120
121struct hws_diag_entry {
122	unsigned int def:16;	    /* 0-15  Data Entry Format		 */
123	unsigned int R:15;	    /* 16-19 and 20-30 reserved		 */
124	unsigned int I:1;	    /* 31 entry valid or invalid	 */
125	u8	     data[];	    /* Machine-dependent sample data	 */
126} __packed;
127
128struct hws_combined_entry {
129	struct hws_basic_entry	basic;	/* Basic-sampling data entry */
130	struct hws_diag_entry	diag;	/* Diagnostic-sampling data entry */
131} __packed;
132
133union hws_trailer_header {
134	struct {
135		unsigned int f:1;	/* 0 - Block Full Indicator   */
136		unsigned int a:1;	/* 1 - Alert request control  */
137		unsigned int t:1;	/* 2 - Timestamp format	      */
138		unsigned int :29;	/* 3 - 31: Reserved	      */
139		unsigned int bsdes:16;	/* 32-47: size of basic SDE   */
140		unsigned int dsdes:16;	/* 48-63: size of diagnostic SDE */
141		unsigned long long overflow; /* 64 - Overflow Count   */
142	};
143	u128 val;
144};
145
146struct hws_trailer_entry {
147	union hws_trailer_header header; /* 0 - 15 Flags + Overflow Count     */
148	unsigned char timestamp[16];	 /* 16 - 31 timestamp		      */
149	unsigned long long reserved1;	 /* 32 -Reserved		      */
150	unsigned long long reserved2;	 /*				      */
151	union {				 /* 48 - reserved for programming use */
152		struct {
153			unsigned int clock_base:1; /* in progusage2 */
154			unsigned long long progusage1:63;
155			unsigned long long progusage2;
156		};
157		unsigned long long progusage[2];
158	};
159} __packed;
160
161/* Load program parameter */
162static inline void lpp(void *pp)
163{
164	asm volatile("lpp 0(%0)\n" :: "a" (pp) : "memory");
165}
166
167/* Query counter information */
168static inline int qctri(struct cpumf_ctr_info *info)
169{
170	int rc = -EINVAL;
171
172	asm volatile (
173		"0:	qctri	%1\n"
174		"1:	lhi	%0,0\n"
175		"2:\n"
176		EX_TABLE(1b, 2b)
177		: "+d" (rc), "=Q" (*info));
178	return rc;
179}
180
181/* Load CPU-counter-set controls */
182static inline int lcctl(u64 ctl)
183{
184	int cc;
185
186	asm volatile (
187		"	lcctl	%1\n"
188		"	ipm	%0\n"
189		"	srl	%0,28\n"
190		: "=d" (cc) : "Q" (ctl) : "cc");
191	return cc;
192}
193
194/* Extract CPU counter */
195static inline int __ecctr(u64 ctr, u64 *content)
196{
197	u64 _content;
198	int cc;
199
200	asm volatile (
201		"	ecctr	%0,%2\n"
202		"	ipm	%1\n"
203		"	srl	%1,28\n"
204		: "=d" (_content), "=d" (cc) : "d" (ctr) : "cc");
205	*content = _content;
206	return cc;
207}
208
209/* Extract CPU counter */
210static inline int ecctr(u64 ctr, u64 *val)
211{
212	u64 content;
213	int cc;
214
215	cc = __ecctr(ctr, &content);
216	if (!cc)
217		*val = content;
218	return cc;
219}
220
221/* Store CPU counter multiple for a particular counter set */
222enum stcctm_ctr_set {
223	EXTENDED = 0,
224	BASIC = 1,
225	PROBLEM_STATE = 2,
226	CRYPTO_ACTIVITY = 3,
227	MT_DIAG = 5,
228	MT_DIAG_CLEARING = 9,	/* clears loss-of-MT-ctr-data alert */
229};
230
231static __always_inline int stcctm(enum stcctm_ctr_set set, u64 range, u64 *dest)
232{
233	int cc;
234
235	asm volatile (
236		"	STCCTM	%2,%3,%1\n"
237		"	ipm	%0\n"
238		"	srl	%0,28\n"
239		: "=d" (cc)
240		: "Q" (*dest), "d" (range), "i" (set)
241		: "cc", "memory");
242	return cc;
243}
244
245/* Query sampling information */
246static inline int qsi(struct hws_qsi_info_block *info)
247{
248	int cc = 1;
249
250	asm volatile(
251		"0:	qsi	%1\n"
252		"1:	lhi	%0,0\n"
253		"2:\n"
254		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
255		: "+d" (cc), "+Q" (*info));
256	return cc ? -EINVAL : 0;
257}
258
259/* Load sampling controls */
260static inline int lsctl(struct hws_lsctl_request_block *req)
261{
262	int cc;
263
264	cc = 1;
265	asm volatile(
266		"0:	lsctl	0(%1)\n"
267		"1:	ipm	%0\n"
268		"	srl	%0,28\n"
269		"2:\n"
270		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
271		: "+d" (cc), "+a" (req)
272		: "m" (*req)
273		: "cc", "memory");
274
275	return cc ? -EINVAL : 0;
276}
277#endif /* _ASM_S390_CPU_MF_H */
278