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1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * CPU-measurement facilities
4  *
5  *  Copyright IBM Corp. 2012, 2018
6  *  Author(s): Hendrik Brueckner <[email protected]>
7  *             Jan Glauber <[email protected]>
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
16 asm(".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 */
35 static inline int cpum_cf_avail(void)
36 {
37         return test_facility(40) && test_facility(67);
38 }
39
40 static inline int cpum_sf_avail(void)
41 {
42         return test_facility(40) && test_facility(68);
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 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
121 struct 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
128 struct 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
133 union 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
146 struct 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 */
162 static inline void lpp(void *pp)
163 {
164         asm volatile("lpp 0(%0)\n" :: "a" (pp) : "memory");
165 }
166
167 /* Query counter information */
168 static 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 */
182 static 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 */
195 static 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 */
210 static 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 */
222 enum 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
231 static __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 */
246 static 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 */
260 static 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 */
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