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Linux kernel mirror (for testing)
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linux
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 */
12int 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
19static inline long poll_pending(void)
20{
21 return plpar_hcall_norets(H_POLL_PENDING);
22}
23
24static inline u8 get_cede_latency_hint(void)
25{
26 return get_lppaca()->cede_latency_hint;
27}
28
29static inline void set_cede_latency_hint(u8 latency_hint)
30{
31 get_lppaca()->cede_latency_hint = latency_hint;
32}
33
34static inline long cede_processor(void)
35{
36 return plpar_hcall_norets(H_CEDE);
37}
38
39static 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
58static 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
66static inline long unregister_vpa(unsigned long cpu)
67{
68 return vpa_call(H_VPA_DEREG_VPA, cpu, 0);
69}
70
71static inline long register_vpa(unsigned long cpu, unsigned long vpa)
72{
73 return vpa_call(H_VPA_REG_VPA, cpu, vpa);
74}
75
76static inline long unregister_slb_shadow(unsigned long cpu)
77{
78 return vpa_call(H_VPA_DEREG_SLB, cpu, 0);
79}
80
81static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
82{
83 return vpa_call(H_VPA_REG_SLB, cpu, vpa);
84}
85
86static inline long unregister_dtl(unsigned long cpu)
87{
88 return vpa_call(H_VPA_DEREG_DTL, cpu, 0);
89}
90
91static inline long register_dtl(unsigned long cpu, unsigned long vpa)
92{
93 return vpa_call(H_VPA_REG_DTL, cpu, vpa);
94}
95
96extern void vpa_init(int cpu);
97
98static 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
112static 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 */
128static 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
143static 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 */
158static 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 */
175static 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 */
193static 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
207static 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
213static 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
219static 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
225static 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
238static 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
244static 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
250static 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 */
257static 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 */
270static 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 */
283static 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 */
294static 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 */
307static 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
313static 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
318static 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
323static 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 */