arch/powerpc/include/asm/plpar_wrappers.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_PLPAR_WRAPPERS_H
   3 #define _ASM_POWERPC_PLPAR_WRAPPERS_H
   4
   5 #include <linux/string.h>
   6 #include <linux/irqflags.h>
   7
   8 #include <asm/hvcall.h>
   9 #include <asm/paca.h>
  10 #include <asm/page.h>
  11
  12 /* Get state of physical CPU from query_cpu_stopped */
  13 int smp_query_cpu_stopped(unsigned int pcpu);
  14 #define QCSS_STOPPED 0
  15 #define QCSS_STOPPING 1
  16 #define QCSS_NOT_STOPPED 2
  17 #define QCSS_HARDWARE_ERROR -1
  18 #define QCSS_HARDWARE_BUSY -2
  19
  20 static inline long poll_pending(void)
  21 {
  22         return plpar_hcall_norets(H_POLL_PENDING);
  23 }
  24
  25 static inline u8 get_cede_latency_hint(void)
  26 {
  27         return get_lppaca()->cede_latency_hint;
  28 }
  29
  30 static inline void set_cede_latency_hint(u8 latency_hint)
  31 {
  32         get_lppaca()->cede_latency_hint = latency_hint;
  33 }
  34
  35 static inline long cede_processor(void)
  36 {
  37         return plpar_hcall_norets(H_CEDE);
  38 }
  39
  40 static inline long extended_cede_processor(unsigned long latency_hint)
  41 {
  42         long rc;
  43         u8 old_latency_hint = get_cede_latency_hint();
  44
  45         set_cede_latency_hint(latency_hint);
  46
  47         rc = cede_processor();
  48 #ifdef CONFIG_TRACE_IRQFLAGS
  49                 /* Ensure that H_CEDE returns with IRQs on */
  50                 if (WARN_ON(!(mfmsr() & MSR_EE)))
  51                         __hard_irq_enable();
  52 #endif
  53
  54         set_cede_latency_hint(old_latency_hint);
  55
  56         return rc;
  57 }
  58
  59 static inline long vpa_call(unsigned long flags, unsigned long cpu,
  60                 unsigned long vpa)
  61 {
  62         flags = flags << H_VPA_FUNC_SHIFT;
  63
  64         return plpar_hcall_norets(H_REGISTER_VPA, flags, cpu, vpa);
  65 }
  66
  67 static inline long unregister_vpa(unsigned long cpu)
  68 {
  69         return vpa_call(H_VPA_DEREG_VPA, cpu, 0);
  70 }
  71
  72 static inline long register_vpa(unsigned long cpu, unsigned long vpa)
  73 {
  74         return vpa_call(H_VPA_REG_VPA, cpu, vpa);
  75 }
  76
  77 static inline long unregister_slb_shadow(unsigned long cpu)
  78 {
  79         return vpa_call(H_VPA_DEREG_SLB, cpu, 0);
  80 }
  81
  82 static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
  83 {
  84         return vpa_call(H_VPA_REG_SLB, cpu, vpa);
  85 }
  86
  87 static inline long unregister_dtl(unsigned long cpu)
  88 {
  89         return vpa_call(H_VPA_DEREG_DTL, cpu, 0);
  90 }
  91
  92 static inline long register_dtl(unsigned long cpu, unsigned long vpa)
  93 {
  94         return vpa_call(H_VPA_REG_DTL, cpu, vpa);
  95 }
  96
  97 extern void vpa_init(int cpu);
  98
  99 static inline long plpar_pte_enter(unsigned long flags,
 100                 unsigned long hpte_group, unsigned long hpte_v,
 101                 unsigned long hpte_r, unsigned long *slot)
 102 {
 103         long rc;
 104         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 105
 106         rc = plpar_hcall(H_ENTER, retbuf, flags, hpte_group, hpte_v, hpte_r);
 107
 108         *slot = retbuf[0];
 109
 110         return rc;
 111 }
 112
 113 static inline long plpar_pte_remove(unsigned long flags, unsigned long ptex,
 114                 unsigned long avpn, unsigned long *old_pteh_ret,
 115                 unsigned long *old_ptel_ret)
 116 {
 117         long rc;
 118         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 119
 120         rc = plpar_hcall(H_REMOVE, retbuf, flags, ptex, avpn);
 121
 122         *old_pteh_ret = retbuf[0];
 123         *old_ptel_ret = retbuf[1];
 124
 125         return rc;
 126 }
 127
 128 /* plpar_pte_remove_raw can be called in real mode. It calls plpar_hcall_raw */
 129 static inline long plpar_pte_remove_raw(unsigned long flags, unsigned long ptex,
 130                 unsigned long avpn, unsigned long *old_pteh_ret,
 131                 unsigned long *old_ptel_ret)
 132 {
 133         long rc;
 134         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 135
 136         rc = plpar_hcall_raw(H_REMOVE, retbuf, flags, ptex, avpn);
 137
 138         *old_pteh_ret = retbuf[0];
 139         *old_ptel_ret = retbuf[1];
 140
 141         return rc;
 142 }
 143
 144 static inline long plpar_pte_read(unsigned long flags, unsigned long ptex,
 145                 unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
 146 {
 147         long rc;
 148         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 149
 150         rc = plpar_hcall(H_READ, retbuf, flags, ptex);
 151
 152         *old_pteh_ret = retbuf[0];
 153         *old_ptel_ret = retbuf[1];
 154
 155         return rc;
 156 }
 157
 158 /* plpar_pte_read_raw can be called in real mode. It calls plpar_hcall_raw */
 159 static inline long plpar_pte_read_raw(unsigned long flags, unsigned long ptex,
 160                 unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
 161 {
 162         long rc;
 163         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 164
 165         rc = plpar_hcall_raw(H_READ, retbuf, flags, ptex);
 166
 167         *old_pteh_ret = retbuf[0];
 168         *old_ptel_ret = retbuf[1];
 169
 170         return rc;
 171 }
 172
 173 /*
 174  * ptes must be 8*sizeof(unsigned long)
 175  */
 176 static inline long plpar_pte_read_4(unsigned long flags, unsigned long ptex,
 177                                     unsigned long *ptes)
 178
 179 {
 180         long rc;
 181         unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
 182
 183         rc = plpar_hcall9(H_READ, retbuf, flags | H_READ_4, ptex);
 184
 185         memcpy(ptes, retbuf, 8*sizeof(unsigned long));
 186
 187         return rc;
 188 }
 189
 190 /*
 191  * plpar_pte_read_4_raw can be called in real mode.
 192  * ptes must be 8*sizeof(unsigned long)
 193  */
 194 static inline long plpar_pte_read_4_raw(unsigned long flags, unsigned long ptex,
 195                                         unsigned long *ptes)
 196
 197 {
 198         long rc;
 199         unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
 200
 201         rc = plpar_hcall9_raw(H_READ, retbuf, flags | H_READ_4, ptex);
 202
 203         memcpy(ptes, retbuf, 8*sizeof(unsigned long));
 204
 205         return rc;
 206 }
 207
 208 static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
 209                 unsigned long avpn)
 210 {
 211         return plpar_hcall_norets(H_PROTECT, flags, ptex, avpn);
 212 }
 213
 214 static inline long plpar_resize_hpt_prepare(unsigned long flags,
 215                                             unsigned long shift)
 216 {
 217         return plpar_hcall_norets(H_RESIZE_HPT_PREPARE, flags, shift);
 218 }
 219
 220 static inline long plpar_resize_hpt_commit(unsigned long flags,
 221                                            unsigned long shift)
 222 {
 223         return plpar_hcall_norets(H_RESIZE_HPT_COMMIT, flags, shift);
 224 }
 225
 226 static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba,
 227                 unsigned long *tce_ret)
 228 {
 229         long rc;
 230         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 231
 232         rc = plpar_hcall(H_GET_TCE, retbuf, liobn, ioba);
 233
 234         *tce_ret = retbuf[0];
 235
 236         return rc;
 237 }
 238
 239 static inline long plpar_tce_put(unsigned long liobn, unsigned long ioba,
 240                 unsigned long tceval)
 241 {
 242         return plpar_hcall_norets(H_PUT_TCE, liobn, ioba, tceval);
 243 }
 244
 245 static inline long plpar_tce_put_indirect(unsigned long liobn,
 246                 unsigned long ioba, unsigned long page, unsigned long count)
 247 {
 248         return plpar_hcall_norets(H_PUT_TCE_INDIRECT, liobn, ioba, page, count);
 249 }
 250
 251 static inline long plpar_tce_stuff(unsigned long liobn, unsigned long ioba,
 252                 unsigned long tceval, unsigned long count)
 253 {
 254         return plpar_hcall_norets(H_STUFF_TCE, liobn, ioba, tceval, count);
 255 }
 256
 257 /* Set various resource mode parameters */
 258 static inline long plpar_set_mode(unsigned long mflags, unsigned long resource,
 259                 unsigned long value1, unsigned long value2)
 260 {
 261         return plpar_hcall_norets(H_SET_MODE, mflags, resource, value1, value2);
 262 }
 263
 264 /*
 265  * Enable relocation on exceptions on this partition
 266  *
 267  * Note: this call has a partition wide scope and can take a while to complete.
 268  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 269  * returns H_SUCCESS.
 270  */
 271 static inline long enable_reloc_on_exceptions(void)
 272 {
 273         /* mflags = 3: Exceptions at 0xC000000000004000 */
 274         return plpar_set_mode(3, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0);
 275 }
 276
 277 /*
 278  * Disable relocation on exceptions on this partition
 279  *
 280  * Note: this call has a partition wide scope and can take a while to complete.
 281  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 282  * returns H_SUCCESS.
 283  */
 284 static inline long disable_reloc_on_exceptions(void) {
 285         return plpar_set_mode(0, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0);
 286 }
 287
 288 /*
 289  * Take exceptions in big endian mode on this partition
 290  *
 291  * Note: this call has a partition wide scope and can take a while to complete.
 292  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 293  * returns H_SUCCESS.
 294  */
 295 static inline long enable_big_endian_exceptions(void)
 296 {
 297         /* mflags = 0: big endian exceptions */
 298         return plpar_set_mode(0, H_SET_MODE_RESOURCE_LE, 0, 0);
 299 }
 300
 301 /*
 302  * Take exceptions in little endian mode on this partition
 303  *
 304  * Note: this call has a partition wide scope and can take a while to complete.
 305  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 306  * returns H_SUCCESS.
 307  */
 308 static inline long enable_little_endian_exceptions(void)
 309 {
 310         /* mflags = 1: little endian exceptions */
 311         return plpar_set_mode(1, H_SET_MODE_RESOURCE_LE, 0, 0);
 312 }
 313
 314 static inline long plapr_set_ciabr(unsigned long ciabr)
 315 {
 316         return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_CIABR, ciabr, 0);
 317 }
 318
 319 static inline long plapr_set_watchpoint0(unsigned long dawr0, unsigned long dawrx0)
 320 {
 321         return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR, dawr0, dawrx0);
 322 }
 323
 324 static inline long plapr_signal_sys_reset(long cpu)
 325 {
 326         return plpar_hcall_norets(H_SIGNAL_SYS_RESET, cpu);
 327 }
 328
 329 static inline long plpar_get_cpu_characteristics(struct h_cpu_char_result *p)
 330 {
 331         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 332         long rc;
 333
 334         rc = plpar_hcall(H_GET_CPU_CHARACTERISTICS, retbuf);
 335         if (rc == H_SUCCESS) {
 336                 p->character = retbuf[0];
 337                 p->behaviour = retbuf[1];
 338         }
 339
 340         return rc;
 341 }
 342
 343 #endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */