This source file includes following definitions.
- set_cpu_flag
- clear_cpu_flag
- test_cpu_flag
- test_cpu_flag_of
- get_cpu_id
- release_thread
- current_stack_pointer
- stap
- __ecag
- psw_set_key
- __load_psw
- __load_psw_mask
- __extract_psw
- local_mcck_enable
- local_mcck_disable
- __rewind_psw
- disabled_wait
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12 #ifndef __ASM_S390_PROCESSOR_H
13 #define __ASM_S390_PROCESSOR_H
14
15 #include <linux/bits.h>
16
17 #define CIF_MCCK_PENDING 0
18 #define CIF_ASCE_PRIMARY 1
19 #define CIF_ASCE_SECONDARY 2
20 #define CIF_NOHZ_DELAY 3
21 #define CIF_FPU 4
22 #define CIF_IGNORE_IRQ 5
23 #define CIF_ENABLED_WAIT 6
24 #define CIF_MCCK_GUEST 7
25 #define CIF_DEDICATED_CPU 8
26
27 #define _CIF_MCCK_PENDING BIT(CIF_MCCK_PENDING)
28 #define _CIF_ASCE_PRIMARY BIT(CIF_ASCE_PRIMARY)
29 #define _CIF_ASCE_SECONDARY BIT(CIF_ASCE_SECONDARY)
30 #define _CIF_NOHZ_DELAY BIT(CIF_NOHZ_DELAY)
31 #define _CIF_FPU BIT(CIF_FPU)
32 #define _CIF_IGNORE_IRQ BIT(CIF_IGNORE_IRQ)
33 #define _CIF_ENABLED_WAIT BIT(CIF_ENABLED_WAIT)
34 #define _CIF_MCCK_GUEST BIT(CIF_MCCK_GUEST)
35 #define _CIF_DEDICATED_CPU BIT(CIF_DEDICATED_CPU)
36
37 #ifndef __ASSEMBLY__
38
39 #include <linux/cpumask.h>
40 #include <linux/linkage.h>
41 #include <linux/irqflags.h>
42 #include <asm/cpu.h>
43 #include <asm/page.h>
44 #include <asm/ptrace.h>
45 #include <asm/setup.h>
46 #include <asm/runtime_instr.h>
47 #include <asm/fpu/types.h>
48 #include <asm/fpu/internal.h>
49
50 static inline void set_cpu_flag(int flag)
51 {
52 S390_lowcore.cpu_flags |= (1UL << flag);
53 }
54
55 static inline void clear_cpu_flag(int flag)
56 {
57 S390_lowcore.cpu_flags &= ~(1UL << flag);
58 }
59
60 static inline int test_cpu_flag(int flag)
61 {
62 return !!(S390_lowcore.cpu_flags & (1UL << flag));
63 }
64
65
66
67
68
69 static inline int test_cpu_flag_of(int flag, int cpu)
70 {
71 struct lowcore *lc = lowcore_ptr[cpu];
72 return !!(lc->cpu_flags & (1UL << flag));
73 }
74
75 #define arch_needs_cpu() test_cpu_flag(CIF_NOHZ_DELAY)
76
77 static inline void get_cpu_id(struct cpuid *ptr)
78 {
79 asm volatile("stidp %0" : "=Q" (*ptr));
80 }
81
82 void s390_adjust_jiffies(void);
83 void s390_update_cpu_mhz(void);
84 void cpu_detect_mhz_feature(void);
85
86 extern const struct seq_operations cpuinfo_op;
87 extern int sysctl_ieee_emulation_warnings;
88 extern void execve_tail(void);
89 extern void __bpon(void);
90
91
92
93
94
95 #define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_31BIT) ? \
96 (1UL << 31) : -PAGE_SIZE)
97 #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \
98 (1UL << 30) : (1UL << 41))
99 #define TASK_SIZE TASK_SIZE_OF(current)
100 #define TASK_SIZE_MAX (-PAGE_SIZE)
101
102 #define STACK_TOP (test_thread_flag(TIF_31BIT) ? \
103 (1UL << 31) : (1UL << 42))
104 #define STACK_TOP_MAX (1UL << 42)
105
106 #define HAVE_ARCH_PICK_MMAP_LAYOUT
107
108 typedef unsigned int mm_segment_t;
109
110
111
112
113 struct thread_struct {
114 unsigned int acrs[NUM_ACRS];
115 unsigned long ksp;
116 unsigned long user_timer;
117 unsigned long guest_timer;
118 unsigned long system_timer;
119 unsigned long hardirq_timer;
120 unsigned long softirq_timer;
121 unsigned long sys_call_table;
122 mm_segment_t mm_segment;
123 unsigned long gmap_addr;
124 unsigned int gmap_write_flag;
125 unsigned int gmap_int_code;
126 unsigned int gmap_pfault;
127
128 struct per_regs per_user;
129 struct per_event per_event;
130 unsigned long per_flags;
131 unsigned int system_call;
132 unsigned long last_break;
133
134 unsigned long pfault_wait;
135 struct list_head list;
136
137 struct runtime_instr_cb *ri_cb;
138 struct gs_cb *gs_cb;
139 struct gs_cb *gs_bc_cb;
140 unsigned char trap_tdb[256];
141
142
143
144
145 struct fpu fpu;
146 };
147
148
149 #define PER_FLAG_NO_TE 1UL
150
151 #define PER_FLAG_TE_ABORT_RAND 2UL
152
153
154
155
156 #define PER_FLAG_TE_ABORT_RAND_TEND 4UL
157
158 typedef struct thread_struct thread_struct;
159
160 #define ARCH_MIN_TASKALIGN 8
161
162 #define INIT_THREAD { \
163 .ksp = sizeof(init_stack) + (unsigned long) &init_stack, \
164 .fpu.regs = (void *) init_task.thread.fpu.fprs, \
165 .last_break = 1, \
166 }
167
168
169
170
171 #define start_thread(regs, new_psw, new_stackp) do { \
172 regs->psw.mask = PSW_USER_BITS | PSW_MASK_EA | PSW_MASK_BA; \
173 regs->psw.addr = new_psw; \
174 regs->gprs[15] = new_stackp; \
175 execve_tail(); \
176 } while (0)
177
178 #define start_thread31(regs, new_psw, new_stackp) do { \
179 regs->psw.mask = PSW_USER_BITS | PSW_MASK_BA; \
180 regs->psw.addr = new_psw; \
181 regs->gprs[15] = new_stackp; \
182 crst_table_downgrade(current->mm); \
183 execve_tail(); \
184 } while (0)
185
186
187 struct task_struct;
188 struct mm_struct;
189 struct seq_file;
190 struct pt_regs;
191
192 void show_registers(struct pt_regs *regs);
193 void show_cacheinfo(struct seq_file *m);
194
195
196 static inline void release_thread(struct task_struct *tsk) { }
197
198
199 void guarded_storage_release(struct task_struct *tsk);
200
201 unsigned long get_wchan(struct task_struct *p);
202 #define task_pt_regs(tsk) ((struct pt_regs *) \
203 (task_stack_page(tsk) + THREAD_SIZE) - 1)
204 #define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr)
205 #define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15])
206
207
208 #define is_ri_task(tsk) (!!(tsk)->thread.ri_cb)
209
210 static inline unsigned long current_stack_pointer(void)
211 {
212 unsigned long sp;
213
214 asm volatile("la %0,0(15)" : "=a" (sp));
215 return sp;
216 }
217
218 static __no_kasan_or_inline unsigned short stap(void)
219 {
220 unsigned short cpu_address;
221
222 asm volatile("stap %0" : "=Q" (cpu_address));
223 return cpu_address;
224 }
225
226 #define cpu_relax() barrier()
227
228 #define ECAG_CACHE_ATTRIBUTE 0
229 #define ECAG_CPU_ATTRIBUTE 1
230
231 static inline unsigned long __ecag(unsigned int asi, unsigned char parm)
232 {
233 unsigned long val;
234
235 asm volatile(".insn rsy,0xeb000000004c,%0,0,0(%1)"
236 : "=d" (val) : "a" (asi << 8 | parm));
237 return val;
238 }
239
240 static inline void psw_set_key(unsigned int key)
241 {
242 asm volatile("spka 0(%0)" : : "d" (key));
243 }
244
245
246
247
248 static inline void __load_psw(psw_t psw)
249 {
250 asm volatile("lpswe %0" : : "Q" (psw) : "cc");
251 }
252
253
254
255
256
257 static __no_kasan_or_inline void __load_psw_mask(unsigned long mask)
258 {
259 unsigned long addr;
260 psw_t psw;
261
262 psw.mask = mask;
263
264 asm volatile(
265 " larl %0,1f\n"
266 " stg %0,%1\n"
267 " lpswe %2\n"
268 "1:"
269 : "=&d" (addr), "=Q" (psw.addr) : "Q" (psw) : "memory", "cc");
270 }
271
272
273
274
275 static inline unsigned long __extract_psw(void)
276 {
277 unsigned int reg1, reg2;
278
279 asm volatile("epsw %0,%1" : "=d" (reg1), "=a" (reg2));
280 return (((unsigned long) reg1) << 32) | ((unsigned long) reg2);
281 }
282
283 static inline void local_mcck_enable(void)
284 {
285 __load_psw_mask(__extract_psw() | PSW_MASK_MCHECK);
286 }
287
288 static inline void local_mcck_disable(void)
289 {
290 __load_psw_mask(__extract_psw() & ~PSW_MASK_MCHECK);
291 }
292
293
294
295
296 static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc)
297 {
298 unsigned long mask;
299
300 mask = (psw.mask & PSW_MASK_EA) ? -1UL :
301 (psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 :
302 (1UL << 24) - 1;
303 return (psw.addr - ilc) & mask;
304 }
305
306
307
308
309 void enabled_wait(void);
310
311
312
313
314 static inline void __noreturn disabled_wait(void)
315 {
316 psw_t psw;
317
318 psw.mask = PSW_MASK_BASE | PSW_MASK_WAIT | PSW_MASK_BA | PSW_MASK_EA;
319 psw.addr = _THIS_IP_;
320 __load_psw(psw);
321 while (1);
322 }
323
324
325
326
327
328 extern void s390_base_pgm_handler(void);
329 extern void s390_base_ext_handler(void);
330
331 extern void (*s390_base_pgm_handler_fn)(void);
332 extern void (*s390_base_ext_handler_fn)(void);
333
334 #define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL
335
336 extern int memcpy_real(void *, void *, size_t);
337 extern void memcpy_absolute(void *, void *, size_t);
338
339 #define mem_assign_absolute(dest, val) do { \
340 __typeof__(dest) __tmp = (val); \
341 \
342 BUILD_BUG_ON(sizeof(__tmp) != sizeof(val)); \
343 memcpy_absolute(&(dest), &__tmp, sizeof(__tmp)); \
344 } while (0)
345
346 extern int s390_isolate_bp(void);
347 extern int s390_isolate_bp_guest(void);
348
349 #endif
350
351 #endif