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 */
327