arch/powerpc/include/asm/plpar_wrappers.h

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