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 #ifdef CONFIG_PPC_PSERIES
   6
   7 #include <linux/string.h>
   8 #include <linux/irqflags.h>
   9
  10 #include <asm/hvcall.h>
  11 #include <asm/paca.h>
  12 #include <asm/page.h>
  13
  14 static inline long poll_pending(void)
  15 {
  16         return plpar_hcall_norets(H_POLL_PENDING);
  17 }
  18
  19 static inline u8 get_cede_latency_hint(void)
  20 {
  21         return get_lppaca()->cede_latency_hint;
  22 }
  23
  24 static inline void set_cede_latency_hint(u8 latency_hint)
  25 {
  26         get_lppaca()->cede_latency_hint = latency_hint;
  27 }
  28
  29 static inline long cede_processor(void)
  30 {
  31         return plpar_hcall_norets(H_CEDE);
  32 }
  33
  34 static inline long extended_cede_processor(unsigned long latency_hint)
  35 {
  36         long rc;
  37         u8 old_latency_hint = get_cede_latency_hint();
  38
  39         set_cede_latency_hint(latency_hint);
  40
  41         rc = cede_processor();
  42 #ifdef CONFIG_PPC_IRQ_SOFT_MASK_DEBUG
  43         /* Ensure that H_CEDE returns with IRQs on */
  44         if (WARN_ON(!(mfmsr() & MSR_EE)))
  45                 __hard_irq_enable();
  46 #endif
  47
  48         set_cede_latency_hint(old_latency_hint);
  49
  50         return rc;
  51 }
  52
  53 static inline long vpa_call(unsigned long flags, unsigned long cpu,
  54                 unsigned long vpa)
  55 {
  56         flags = flags << H_VPA_FUNC_SHIFT;
  57
  58         return plpar_hcall_norets(H_REGISTER_VPA, flags, cpu, vpa);
  59 }
  60
  61 static inline long unregister_vpa(unsigned long cpu)
  62 {
  63         return vpa_call(H_VPA_DEREG_VPA, cpu, 0);
  64 }
  65
  66 static inline long register_vpa(unsigned long cpu, unsigned long vpa)
  67 {
  68         return vpa_call(H_VPA_REG_VPA, cpu, vpa);
  69 }
  70
  71 static inline long unregister_slb_shadow(unsigned long cpu)
  72 {
  73         return vpa_call(H_VPA_DEREG_SLB, cpu, 0);
  74 }
  75
  76 static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
  77 {
  78         return vpa_call(H_VPA_REG_SLB, cpu, vpa);
  79 }
  80
  81 static inline long unregister_dtl(unsigned long cpu)
  82 {
  83         return vpa_call(H_VPA_DEREG_DTL, cpu, 0);
  84 }
  85
  86 static inline long register_dtl(unsigned long cpu, unsigned long vpa)
  87 {
  88         return vpa_call(H_VPA_REG_DTL, cpu, vpa);
  89 }
  90
  91 extern void vpa_init(int cpu);
  92
  93 static inline long plpar_pte_enter(unsigned long flags,
  94                 unsigned long hpte_group, unsigned long hpte_v,
  95                 unsigned long hpte_r, unsigned long *slot)
  96 {
  97         long rc;
  98         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
  99
 100         rc = plpar_hcall(H_ENTER, retbuf, flags, hpte_group, hpte_v, hpte_r);
 101
 102         *slot = retbuf[0];
 103
 104         return rc;
 105 }
 106
 107 static inline long plpar_pte_remove(unsigned long flags, unsigned long ptex,
 108                 unsigned long avpn, unsigned long *old_pteh_ret,
 109                 unsigned long *old_ptel_ret)
 110 {
 111         long rc;
 112         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 113
 114         rc = plpar_hcall(H_REMOVE, retbuf, flags, ptex, avpn);
 115
 116         *old_pteh_ret = retbuf[0];
 117         *old_ptel_ret = retbuf[1];
 118
 119         return rc;
 120 }
 121
 122 /* plpar_pte_remove_raw can be called in real mode. It calls plpar_hcall_raw */
 123 static inline long plpar_pte_remove_raw(unsigned long flags, unsigned long ptex,
 124                 unsigned long avpn, unsigned long *old_pteh_ret,
 125                 unsigned long *old_ptel_ret)
 126 {
 127         long rc;
 128         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 129
 130         rc = plpar_hcall_raw(H_REMOVE, retbuf, flags, ptex, avpn);
 131
 132         *old_pteh_ret = retbuf[0];
 133         *old_ptel_ret = retbuf[1];
 134
 135         return rc;
 136 }
 137
 138 static inline long plpar_pte_read(unsigned long flags, unsigned long ptex,
 139                 unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
 140 {
 141         long rc;
 142         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 143
 144         rc = plpar_hcall(H_READ, retbuf, flags, ptex);
 145
 146         *old_pteh_ret = retbuf[0];
 147         *old_ptel_ret = retbuf[1];
 148
 149         return rc;
 150 }
 151
 152 /* plpar_pte_read_raw can be called in real mode. It calls plpar_hcall_raw */
 153 static inline long plpar_pte_read_raw(unsigned long flags, unsigned long ptex,
 154                 unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
 155 {
 156         long rc;
 157         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 158
 159         rc = plpar_hcall_raw(H_READ, retbuf, flags, ptex);
 160
 161         *old_pteh_ret = retbuf[0];
 162         *old_ptel_ret = retbuf[1];
 163
 164         return rc;
 165 }
 166
 167 /*
 168  * ptes must be 8*sizeof(unsigned long)
 169  */
 170 static inline long plpar_pte_read_4(unsigned long flags, unsigned long ptex,
 171                                     unsigned long *ptes)
 172
 173 {
 174         long rc;
 175         unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
 176
 177         rc = plpar_hcall9(H_READ, retbuf, flags | H_READ_4, ptex);
 178
 179         memcpy(ptes, retbuf, 8*sizeof(unsigned long));
 180
 181         return rc;
 182 }
 183
 184 /*
 185  * plpar_pte_read_4_raw can be called in real mode.
 186  * ptes must be 8*sizeof(unsigned long)
 187  */
 188 static inline long plpar_pte_read_4_raw(unsigned long flags, unsigned long ptex,
 189                                         unsigned long *ptes)
 190
 191 {
 192         long rc;
 193         unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
 194
 195         rc = plpar_hcall9_raw(H_READ, retbuf, flags | H_READ_4, ptex);
 196
 197         memcpy(ptes, retbuf, 8*sizeof(unsigned long));
 198
 199         return rc;
 200 }
 201
 202 static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
 203                 unsigned long avpn)
 204 {
 205         return plpar_hcall_norets(H_PROTECT, flags, ptex, avpn);
 206 }
 207
 208 static inline long plpar_resize_hpt_prepare(unsigned long flags,
 209                                             unsigned long shift)
 210 {
 211         return plpar_hcall_norets(H_RESIZE_HPT_PREPARE, flags, shift);
 212 }
 213
 214 static inline long plpar_resize_hpt_commit(unsigned long flags,
 215                                            unsigned long shift)
 216 {
 217         return plpar_hcall_norets(H_RESIZE_HPT_COMMIT, flags, shift);
 218 }
 219
 220 static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba,
 221                 unsigned long *tce_ret)
 222 {
 223         long rc;
 224         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 225
 226         rc = plpar_hcall(H_GET_TCE, retbuf, liobn, ioba);
 227
 228         *tce_ret = retbuf[0];
 229
 230         return rc;
 231 }
 232
 233 static inline long plpar_tce_put(unsigned long liobn, unsigned long ioba,
 234                 unsigned long tceval)
 235 {
 236         return plpar_hcall_norets(H_PUT_TCE, liobn, ioba, tceval);
 237 }
 238
 239 static inline long plpar_tce_put_indirect(unsigned long liobn,
 240                 unsigned long ioba, unsigned long page, unsigned long count)
 241 {
 242         return plpar_hcall_norets(H_PUT_TCE_INDIRECT, liobn, ioba, page, count);
 243 }
 244
 245 static inline long plpar_tce_stuff(unsigned long liobn, unsigned long ioba,
 246                 unsigned long tceval, unsigned long count)
 247 {
 248         return plpar_hcall_norets(H_STUFF_TCE, liobn, ioba, tceval, count);
 249 }
 250
 251 /* Set various resource mode parameters */
 252 static inline long plpar_set_mode(unsigned long mflags, unsigned long resource,
 253                 unsigned long value1, unsigned long value2)
 254 {
 255         return plpar_hcall_norets(H_SET_MODE, mflags, resource, value1, value2);
 256 }
 257
 258 /*
 259  * Enable relocation on exceptions on this partition
 260  *
 261  * Note: this call has a partition wide scope and can take a while to complete.
 262  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 263  * returns H_SUCCESS.
 264  */
 265 static inline long enable_reloc_on_exceptions(void)
 266 {
 267         /* mflags = 3: Exceptions at 0xC000000000004000 */
 268         return plpar_set_mode(3, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0);
 269 }
 270
 271 /*
 272  * Disable relocation on exceptions on this partition
 273  *
 274  * Note: this call has a partition wide scope and can take a while to complete.
 275  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 276  * returns H_SUCCESS.
 277  */
 278 static inline long disable_reloc_on_exceptions(void) {
 279         return plpar_set_mode(0, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0);
 280 }
 281
 282 /*
 283  * Take exceptions in big endian mode on this partition
 284  *
 285  * Note: this call has a partition wide scope and can take a while to complete.
 286  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 287  * returns H_SUCCESS.
 288  */
 289 static inline long enable_big_endian_exceptions(void)
 290 {
 291         /* mflags = 0: big endian exceptions */
 292         return plpar_set_mode(0, H_SET_MODE_RESOURCE_LE, 0, 0);
 293 }
 294
 295 /*
 296  * Take exceptions in little endian mode on this partition
 297  *
 298  * Note: this call has a partition wide scope and can take a while to complete.
 299  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 300  * returns H_SUCCESS.
 301  */
 302 static inline long enable_little_endian_exceptions(void)
 303 {
 304         /* mflags = 1: little endian exceptions */
 305         return plpar_set_mode(1, H_SET_MODE_RESOURCE_LE, 0, 0);
 306 }
 307
 308 static inline long plpar_set_ciabr(unsigned long ciabr)
 309 {
 310         return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_CIABR, ciabr, 0);
 311 }
 312
 313 static inline long plpar_set_watchpoint0(unsigned long dawr0, unsigned long dawrx0)
 314 {
 315         return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR, dawr0, dawrx0);
 316 }
 317
 318 static inline long plpar_signal_sys_reset(long cpu)
 319 {
 320         return plpar_hcall_norets(H_SIGNAL_SYS_RESET, cpu);
 321 }
 322
 323 static inline long plpar_get_cpu_characteristics(struct h_cpu_char_result *p)
 324 {
 325         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 326         long rc;
 327
 328         rc = plpar_hcall(H_GET_CPU_CHARACTERISTICS, retbuf);
 329         if (rc == H_SUCCESS) {
 330                 p->character = retbuf[0];
 331                 p->behaviour = retbuf[1];
 332         }
 333
 334         return rc;
 335 }
 336
 337 #else /* !CONFIG_PPC_PSERIES */
 338
 339 static inline long plpar_set_ciabr(unsigned long ciabr)
 340 {
 341         return 0;
 342 }
 343
 344 static inline long plpar_pte_read_4(unsigned long flags, unsigned long ptex,
 345                                     unsigned long *ptes)
 346 {
 347         return 0;
 348 }
 349 #endif /* CONFIG_PPC_PSERIES */
 350
 351 #endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */