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33#ifndef _ASM_X86_XEN_HYPERCALL_H
34#define _ASM_X86_XEN_HYPERCALL_H
35
36#include <linux/kernel.h>
37#include <linux/spinlock.h>
38#include <linux/errno.h>
39#include <linux/string.h>
40#include <linux/types.h>
41
42#include <trace/events/xen.h>
43
44#include <asm/page.h>
45#include <asm/pgtable.h>
46#include <asm/smap.h>
47#include <asm/nospec-branch.h>
48
49#include <xen/interface/xen.h>
50#include <xen/interface/sched.h>
51#include <xen/interface/physdev.h>
52#include <xen/interface/platform.h>
53#include <xen/interface/xen-mca.h>
54
55struct xen_dm_op_buf;
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89extern struct { char _entry[32]; } hypercall_page[];
90
91#define __HYPERCALL "call hypercall_page+%c[offset]"
92#define __HYPERCALL_ENTRY(x) \
93 [offset] "i" (__HYPERVISOR_##x * sizeof(hypercall_page[0]))
94
95#ifdef CONFIG_X86_32
96#define __HYPERCALL_RETREG "eax"
97#define __HYPERCALL_ARG1REG "ebx"
98#define __HYPERCALL_ARG2REG "ecx"
99#define __HYPERCALL_ARG3REG "edx"
100#define __HYPERCALL_ARG4REG "esi"
101#define __HYPERCALL_ARG5REG "edi"
102#else
103#define __HYPERCALL_RETREG "rax"
104#define __HYPERCALL_ARG1REG "rdi"
105#define __HYPERCALL_ARG2REG "rsi"
106#define __HYPERCALL_ARG3REG "rdx"
107#define __HYPERCALL_ARG4REG "r10"
108#define __HYPERCALL_ARG5REG "r8"
109#endif
110
111#define __HYPERCALL_DECLS \
112 register unsigned long __res asm(__HYPERCALL_RETREG); \
113 register unsigned long __arg1 asm(__HYPERCALL_ARG1REG) = __arg1; \
114 register unsigned long __arg2 asm(__HYPERCALL_ARG2REG) = __arg2; \
115 register unsigned long __arg3 asm(__HYPERCALL_ARG3REG) = __arg3; \
116 register unsigned long __arg4 asm(__HYPERCALL_ARG4REG) = __arg4; \
117 register unsigned long __arg5 asm(__HYPERCALL_ARG5REG) = __arg5;
118
119#define __HYPERCALL_0PARAM "=r" (__res), ASM_CALL_CONSTRAINT
120#define __HYPERCALL_1PARAM __HYPERCALL_0PARAM, "+r" (__arg1)
121#define __HYPERCALL_2PARAM __HYPERCALL_1PARAM, "+r" (__arg2)
122#define __HYPERCALL_3PARAM __HYPERCALL_2PARAM, "+r" (__arg3)
123#define __HYPERCALL_4PARAM __HYPERCALL_3PARAM, "+r" (__arg4)
124#define __HYPERCALL_5PARAM __HYPERCALL_4PARAM, "+r" (__arg5)
125
126#define __HYPERCALL_0ARG()
127#define __HYPERCALL_1ARG(a1) \
128 __HYPERCALL_0ARG() __arg1 = (unsigned long)(a1);
129#define __HYPERCALL_2ARG(a1,a2) \
130 __HYPERCALL_1ARG(a1) __arg2 = (unsigned long)(a2);
131#define __HYPERCALL_3ARG(a1,a2,a3) \
132 __HYPERCALL_2ARG(a1,a2) __arg3 = (unsigned long)(a3);
133#define __HYPERCALL_4ARG(a1,a2,a3,a4) \
134 __HYPERCALL_3ARG(a1,a2,a3) __arg4 = (unsigned long)(a4);
135#define __HYPERCALL_5ARG(a1,a2,a3,a4,a5) \
136 __HYPERCALL_4ARG(a1,a2,a3,a4) __arg5 = (unsigned long)(a5);
137
138#define __HYPERCALL_CLOBBER5 "memory"
139#define __HYPERCALL_CLOBBER4 __HYPERCALL_CLOBBER5, __HYPERCALL_ARG5REG
140#define __HYPERCALL_CLOBBER3 __HYPERCALL_CLOBBER4, __HYPERCALL_ARG4REG
141#define __HYPERCALL_CLOBBER2 __HYPERCALL_CLOBBER3, __HYPERCALL_ARG3REG
142#define __HYPERCALL_CLOBBER1 __HYPERCALL_CLOBBER2, __HYPERCALL_ARG2REG
143#define __HYPERCALL_CLOBBER0 __HYPERCALL_CLOBBER1, __HYPERCALL_ARG1REG
144
145#define _hypercall0(type, name) \
146({ \
147 __HYPERCALL_DECLS; \
148 __HYPERCALL_0ARG(); \
149 asm volatile (__HYPERCALL \
150 : __HYPERCALL_0PARAM \
151 : __HYPERCALL_ENTRY(name) \
152 : __HYPERCALL_CLOBBER0); \
153 (type)__res; \
154})
155
156#define _hypercall1(type, name, a1) \
157({ \
158 __HYPERCALL_DECLS; \
159 __HYPERCALL_1ARG(a1); \
160 asm volatile (__HYPERCALL \
161 : __HYPERCALL_1PARAM \
162 : __HYPERCALL_ENTRY(name) \
163 : __HYPERCALL_CLOBBER1); \
164 (type)__res; \
165})
166
167#define _hypercall2(type, name, a1, a2) \
168({ \
169 __HYPERCALL_DECLS; \
170 __HYPERCALL_2ARG(a1, a2); \
171 asm volatile (__HYPERCALL \
172 : __HYPERCALL_2PARAM \
173 : __HYPERCALL_ENTRY(name) \
174 : __HYPERCALL_CLOBBER2); \
175 (type)__res; \
176})
177
178#define _hypercall3(type, name, a1, a2, a3) \
179({ \
180 __HYPERCALL_DECLS; \
181 __HYPERCALL_3ARG(a1, a2, a3); \
182 asm volatile (__HYPERCALL \
183 : __HYPERCALL_3PARAM \
184 : __HYPERCALL_ENTRY(name) \
185 : __HYPERCALL_CLOBBER3); \
186 (type)__res; \
187})
188
189#define _hypercall4(type, name, a1, a2, a3, a4) \
190({ \
191 __HYPERCALL_DECLS; \
192 __HYPERCALL_4ARG(a1, a2, a3, a4); \
193 asm volatile (__HYPERCALL \
194 : __HYPERCALL_4PARAM \
195 : __HYPERCALL_ENTRY(name) \
196 : __HYPERCALL_CLOBBER4); \
197 (type)__res; \
198})
199
200static inline long
201xen_single_call(unsigned int call,
202 unsigned long a1, unsigned long a2,
203 unsigned long a3, unsigned long a4,
204 unsigned long a5)
205{
206 __HYPERCALL_DECLS;
207 __HYPERCALL_5ARG(a1, a2, a3, a4, a5);
208
209 if (call >= PAGE_SIZE / sizeof(hypercall_page[0]))
210 return -EINVAL;
211
212 asm volatile(CALL_NOSPEC
213 : __HYPERCALL_5PARAM
214 : [thunk_target] "a" (&hypercall_page[call])
215 : __HYPERCALL_CLOBBER5);
216
217 return (long)__res;
218}
219
220static __always_inline void __xen_stac(void)
221{
222
223
224
225
226 asm volatile(ANNOTATE_IGNORE_ALTERNATIVE
227 ASM_STAC ::: "memory", "flags");
228}
229
230static __always_inline void __xen_clac(void)
231{
232 asm volatile(ANNOTATE_IGNORE_ALTERNATIVE
233 ASM_CLAC ::: "memory", "flags");
234}
235
236static inline long
237privcmd_call(unsigned int call,
238 unsigned long a1, unsigned long a2,
239 unsigned long a3, unsigned long a4,
240 unsigned long a5)
241{
242 long res;
243
244 __xen_stac();
245 res = xen_single_call(call, a1, a2, a3, a4, a5);
246 __xen_clac();
247
248 return res;
249}
250
251static inline int
252HYPERVISOR_set_trap_table(struct trap_info *table)
253{
254 return _hypercall1(int, set_trap_table, table);
255}
256
257static inline int
258HYPERVISOR_mmu_update(struct mmu_update *req, int count,
259 int *success_count, domid_t domid)
260{
261 return _hypercall4(int, mmu_update, req, count, success_count, domid);
262}
263
264static inline int
265HYPERVISOR_mmuext_op(struct mmuext_op *op, int count,
266 int *success_count, domid_t domid)
267{
268 return _hypercall4(int, mmuext_op, op, count, success_count, domid);
269}
270
271static inline int
272HYPERVISOR_set_gdt(unsigned long *frame_list, int entries)
273{
274 return _hypercall2(int, set_gdt, frame_list, entries);
275}
276
277static inline int
278HYPERVISOR_callback_op(int cmd, void *arg)
279{
280 return _hypercall2(int, callback_op, cmd, arg);
281}
282
283static inline int
284HYPERVISOR_sched_op(int cmd, void *arg)
285{
286 return _hypercall2(int, sched_op, cmd, arg);
287}
288
289static inline long
290HYPERVISOR_set_timer_op(u64 timeout)
291{
292 unsigned long timeout_hi = (unsigned long)(timeout>>32);
293 unsigned long timeout_lo = (unsigned long)timeout;
294 return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
295}
296
297static inline int
298HYPERVISOR_mca(struct xen_mc *mc_op)
299{
300 mc_op->interface_version = XEN_MCA_INTERFACE_VERSION;
301 return _hypercall1(int, mca, mc_op);
302}
303
304static inline int
305HYPERVISOR_platform_op(struct xen_platform_op *op)
306{
307 op->interface_version = XENPF_INTERFACE_VERSION;
308 return _hypercall1(int, platform_op, op);
309}
310
311static inline int
312HYPERVISOR_set_debugreg(int reg, unsigned long value)
313{
314 return _hypercall2(int, set_debugreg, reg, value);
315}
316
317static inline unsigned long
318HYPERVISOR_get_debugreg(int reg)
319{
320 return _hypercall1(unsigned long, get_debugreg, reg);
321}
322
323static inline int
324HYPERVISOR_update_descriptor(u64 ma, u64 desc)
325{
326 if (sizeof(u64) == sizeof(long))
327 return _hypercall2(int, update_descriptor, ma, desc);
328 return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
329}
330
331static inline long
332HYPERVISOR_memory_op(unsigned int cmd, void *arg)
333{
334 return _hypercall2(long, memory_op, cmd, arg);
335}
336
337static inline int
338HYPERVISOR_multicall(void *call_list, uint32_t nr_calls)
339{
340 return _hypercall2(int, multicall, call_list, nr_calls);
341}
342
343static inline int
344HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val,
345 unsigned long flags)
346{
347 if (sizeof(new_val) == sizeof(long))
348 return _hypercall3(int, update_va_mapping, va,
349 new_val.pte, flags);
350 else
351 return _hypercall4(int, update_va_mapping, va,
352 new_val.pte, new_val.pte >> 32, flags);
353}
354
355static inline int
356HYPERVISOR_event_channel_op(int cmd, void *arg)
357{
358 return _hypercall2(int, event_channel_op, cmd, arg);
359}
360
361static inline int
362HYPERVISOR_xen_version(int cmd, void *arg)
363{
364 return _hypercall2(int, xen_version, cmd, arg);
365}
366
367static inline int
368HYPERVISOR_console_io(int cmd, int count, char *str)
369{
370 return _hypercall3(int, console_io, cmd, count, str);
371}
372
373static inline int
374HYPERVISOR_physdev_op(int cmd, void *arg)
375{
376 return _hypercall2(int, physdev_op, cmd, arg);
377}
378
379static inline int
380HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
381{
382 return _hypercall3(int, grant_table_op, cmd, uop, count);
383}
384
385static inline int
386HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type)
387{
388 return _hypercall2(int, vm_assist, cmd, type);
389}
390
391static inline int
392HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args)
393{
394 return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
395}
396
397#ifdef CONFIG_X86_64
398static inline int
399HYPERVISOR_set_segment_base(int reg, unsigned long value)
400{
401 return _hypercall2(int, set_segment_base, reg, value);
402}
403#endif
404
405static inline int
406HYPERVISOR_suspend(unsigned long start_info_mfn)
407{
408 struct sched_shutdown r = { .reason = SHUTDOWN_suspend };
409
410
411
412
413
414
415
416 return _hypercall3(int, sched_op, SCHEDOP_shutdown, &r, start_info_mfn);
417}
418
419static inline unsigned long __must_check
420HYPERVISOR_hvm_op(int op, void *arg)
421{
422 return _hypercall2(unsigned long, hvm_op, op, arg);
423}
424
425static inline int
426HYPERVISOR_tmem_op(
427 struct tmem_op *op)
428{
429 return _hypercall1(int, tmem_op, op);
430}
431
432static inline int
433HYPERVISOR_xenpmu_op(unsigned int op, void *arg)
434{
435 return _hypercall2(int, xenpmu_op, op, arg);
436}
437
438static inline int
439HYPERVISOR_dm_op(
440 domid_t dom, unsigned int nr_bufs, struct xen_dm_op_buf *bufs)
441{
442 int ret;
443 __xen_stac();
444 ret = _hypercall3(int, dm_op, dom, nr_bufs, bufs);
445 __xen_clac();
446 return ret;
447}
448
449static inline void
450MULTI_fpu_taskswitch(struct multicall_entry *mcl, int set)
451{
452 mcl->op = __HYPERVISOR_fpu_taskswitch;
453 mcl->args[0] = set;
454
455 trace_xen_mc_entry(mcl, 1);
456}
457
458static inline void
459MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
460 pte_t new_val, unsigned long flags)
461{
462 mcl->op = __HYPERVISOR_update_va_mapping;
463 mcl->args[0] = va;
464 if (sizeof(new_val) == sizeof(long)) {
465 mcl->args[1] = new_val.pte;
466 mcl->args[2] = flags;
467 } else {
468 mcl->args[1] = new_val.pte;
469 mcl->args[2] = new_val.pte >> 32;
470 mcl->args[3] = flags;
471 }
472
473 trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 3 : 4);
474}
475
476static inline void
477MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
478 struct desc_struct desc)
479{
480 mcl->op = __HYPERVISOR_update_descriptor;
481 if (sizeof(maddr) == sizeof(long)) {
482 mcl->args[0] = maddr;
483 mcl->args[1] = *(unsigned long *)&desc;
484 } else {
485 u32 *p = (u32 *)&desc;
486
487 mcl->args[0] = maddr;
488 mcl->args[1] = maddr >> 32;
489 mcl->args[2] = *p++;
490 mcl->args[3] = *p;
491 }
492
493 trace_xen_mc_entry(mcl, sizeof(maddr) == sizeof(long) ? 2 : 4);
494}
495
496static inline void
497MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
498 int count, int *success_count, domid_t domid)
499{
500 mcl->op = __HYPERVISOR_mmu_update;
501 mcl->args[0] = (unsigned long)req;
502 mcl->args[1] = count;
503 mcl->args[2] = (unsigned long)success_count;
504 mcl->args[3] = domid;
505
506 trace_xen_mc_entry(mcl, 4);
507}
508
509static inline void
510MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count,
511 int *success_count, domid_t domid)
512{
513 mcl->op = __HYPERVISOR_mmuext_op;
514 mcl->args[0] = (unsigned long)op;
515 mcl->args[1] = count;
516 mcl->args[2] = (unsigned long)success_count;
517 mcl->args[3] = domid;
518
519 trace_xen_mc_entry(mcl, 4);
520}
521
522static inline void
523MULTI_stack_switch(struct multicall_entry *mcl,
524 unsigned long ss, unsigned long esp)
525{
526 mcl->op = __HYPERVISOR_stack_switch;
527 mcl->args[0] = ss;
528 mcl->args[1] = esp;
529
530 trace_xen_mc_entry(mcl, 2);
531}
532
533#endif
534