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 static inline long plpar_page_set_loaned(unsigned long vpa)
  97 {
  98         unsigned long cmo_page_sz = cmo_get_page_size();
  99         long rc = 0;
 100         int i;
 101
 102         for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
 103                 rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, vpa + i, 0);
 104
 105         for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
 106                 plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE,
 107                                    vpa + i - cmo_page_sz, 0);
 108
 109         return rc;
 110 }
 111
 112 static inline long plpar_page_set_active(unsigned long vpa)
 113 {
 114         unsigned long cmo_page_sz = cmo_get_page_size();
 115         long rc = 0;
 116         int i;
 117
 118         for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
 119                 rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, vpa + i, 0);
 120
 121         for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
 122                 plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED,
 123                                    vpa + i - cmo_page_sz, 0);
 124
 125         return rc;
 126 }
 127
 128 extern void vpa_init(int cpu);
 129
 130 static inline long plpar_pte_enter(unsigned long flags,
 131                 unsigned long hpte_group, unsigned long hpte_v,
 132                 unsigned long hpte_r, unsigned long *slot)
 133 {
 134         long rc;
 135         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 136
 137         rc = plpar_hcall(H_ENTER, retbuf, flags, hpte_group, hpte_v, hpte_r);
 138
 139         *slot = retbuf[0];
 140
 141         return rc;
 142 }
 143
 144 static inline long plpar_pte_remove(unsigned long flags, unsigned long ptex,
 145                 unsigned long avpn, unsigned long *old_pteh_ret,
 146                 unsigned long *old_ptel_ret)
 147 {
 148         long rc;
 149         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 150
 151         rc = plpar_hcall(H_REMOVE, retbuf, flags, ptex, avpn);
 152
 153         *old_pteh_ret = retbuf[0];
 154         *old_ptel_ret = retbuf[1];
 155
 156         return rc;
 157 }
 158
 159 /* plpar_pte_remove_raw can be called in real mode. It calls plpar_hcall_raw */
 160 static inline long plpar_pte_remove_raw(unsigned long flags, unsigned long ptex,
 161                 unsigned long avpn, unsigned long *old_pteh_ret,
 162                 unsigned long *old_ptel_ret)
 163 {
 164         long rc;
 165         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 166
 167         rc = plpar_hcall_raw(H_REMOVE, retbuf, flags, ptex, avpn);
 168
 169         *old_pteh_ret = retbuf[0];
 170         *old_ptel_ret = retbuf[1];
 171
 172         return rc;
 173 }
 174
 175 static inline long plpar_pte_read(unsigned long flags, unsigned long ptex,
 176                 unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
 177 {
 178         long rc;
 179         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 180
 181         rc = plpar_hcall(H_READ, retbuf, flags, ptex);
 182
 183         *old_pteh_ret = retbuf[0];
 184         *old_ptel_ret = retbuf[1];
 185
 186         return rc;
 187 }
 188
 189 /* plpar_pte_read_raw can be called in real mode. It calls plpar_hcall_raw */
 190 static inline long plpar_pte_read_raw(unsigned long flags, unsigned long ptex,
 191                 unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
 192 {
 193         long rc;
 194         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 195
 196         rc = plpar_hcall_raw(H_READ, retbuf, flags, ptex);
 197
 198         *old_pteh_ret = retbuf[0];
 199         *old_ptel_ret = retbuf[1];
 200
 201         return rc;
 202 }
 203
 204 /*
 205  * plpar_pte_read_4_raw can be called in real mode.
 206  * ptes must be 8*sizeof(unsigned long)
 207  */
 208 static inline long plpar_pte_read_4_raw(unsigned long flags, unsigned long ptex,
 209                                         unsigned long *ptes)
 210
 211 {
 212         long rc;
 213         unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
 214
 215         rc = plpar_hcall9_raw(H_READ, retbuf, flags | H_READ_4, ptex);
 216
 217         memcpy(ptes, retbuf, 8*sizeof(unsigned long));
 218
 219         return rc;
 220 }
 221
 222 static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
 223                 unsigned long avpn)
 224 {
 225         return plpar_hcall_norets(H_PROTECT, flags, ptex, avpn);
 226 }
 227
 228 static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba,
 229                 unsigned long *tce_ret)
 230 {
 231         long rc;
 232         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 233
 234         rc = plpar_hcall(H_GET_TCE, retbuf, liobn, ioba);
 235
 236         *tce_ret = retbuf[0];
 237
 238         return rc;
 239 }
 240
 241 static inline long plpar_tce_put(unsigned long liobn, unsigned long ioba,
 242                 unsigned long tceval)
 243 {
 244         return plpar_hcall_norets(H_PUT_TCE, liobn, ioba, tceval);
 245 }
 246
 247 static inline long plpar_tce_put_indirect(unsigned long liobn,
 248                 unsigned long ioba, unsigned long page, unsigned long count)
 249 {
 250         return plpar_hcall_norets(H_PUT_TCE_INDIRECT, liobn, ioba, page, count);
 251 }
 252
 253 static inline long plpar_tce_stuff(unsigned long liobn, unsigned long ioba,
 254                 unsigned long tceval, unsigned long count)
 255 {
 256         return plpar_hcall_norets(H_STUFF_TCE, liobn, ioba, tceval, count);
 257 }
 258
 259 /* Set various resource mode parameters */
 260 static inline long plpar_set_mode(unsigned long mflags, unsigned long resource,
 261                 unsigned long value1, unsigned long value2)
 262 {
 263         return plpar_hcall_norets(H_SET_MODE, mflags, resource, value1, value2);
 264 }
 265
 266 /*
 267  * Enable relocation on exceptions on this partition
 268  *
 269  * Note: this call has a partition wide scope and can take a while to complete.
 270  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 271  * returns H_SUCCESS.
 272  */
 273 static inline long enable_reloc_on_exceptions(void)
 274 {
 275         /* mflags = 3: Exceptions at 0xC000000000004000 */
 276         return plpar_set_mode(3, 3, 0, 0);
 277 }
 278
 279 /*
 280  * Disable relocation on exceptions on this partition
 281  *
 282  * Note: this call has a partition wide scope and can take a while to complete.
 283  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 284  * returns H_SUCCESS.
 285  */
 286 static inline long disable_reloc_on_exceptions(void) {
 287         return plpar_set_mode(0, 3, 0, 0);
 288 }
 289
 290 /*
 291  * Take exceptions in big endian mode on this partition
 292  *
 293  * Note: this call has a partition wide scope and can take a while to complete.
 294  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 295  * returns H_SUCCESS.
 296  */
 297 static inline long enable_big_endian_exceptions(void)
 298 {
 299         /* mflags = 0: big endian exceptions */
 300         return plpar_set_mode(0, 4, 0, 0);
 301 }
 302
 303 /*
 304  * Take exceptions in little endian mode on this partition
 305  *
 306  * Note: this call has a partition wide scope and can take a while to complete.
 307  * If it returns H_LONG_BUSY_* it should be retried periodically until it
 308  * returns H_SUCCESS.
 309  */
 310 static inline long enable_little_endian_exceptions(void)
 311 {
 312         /* mflags = 1: little endian exceptions */
 313         return plpar_set_mode(1, 4, 0, 0);
 314 }
 315
 316 static inline long plapr_set_ciabr(unsigned long ciabr)
 317 {
 318         return plpar_set_mode(0, 1, ciabr, 0);
 319 }
 320
 321 static inline long plapr_set_watchpoint0(unsigned long dawr0, unsigned long dawrx0)
 322 {
 323         return plpar_set_mode(0, 2, dawr0, dawrx0);
 324 }
 325
 326 #endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */