~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/s390/kvm/kvm-s390.h

Version: ~ [ linux-5.16 ] ~ [ linux-5.15.13 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.90 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.170 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.224 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.261 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.296 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.298 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * definition for kvm on s390
  3  *
  4  * Copyright IBM Corp. 2008, 2009
  5  *
  6  * This program is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License (version 2 only)
  8  * as published by the Free Software Foundation.
  9  *
 10  *    Author(s): Carsten Otte <cotte@de.ibm.com>
 11  *               Christian Borntraeger <borntraeger@de.ibm.com>
 12  *               Christian Ehrhardt <ehrhardt@de.ibm.com>
 13  */
 14 
 15 #ifndef ARCH_S390_KVM_S390_H
 16 #define ARCH_S390_KVM_S390_H
 17 
 18 #include <linux/hrtimer.h>
 19 #include <linux/kvm.h>
 20 #include <linux/kvm_host.h>
 21 #include <asm/facility.h>
 22 #include <asm/processor.h>
 23 #include <asm/sclp.h>
 24 
 25 typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
 26 
 27 /* Transactional Memory Execution related macros */
 28 #define IS_TE_ENABLED(vcpu)     ((vcpu->arch.sie_block->ecb & ECB_TE))
 29 #define TDB_FORMAT1             1
 30 #define IS_ITDB_VALID(vcpu)     ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
 31 
 32 extern debug_info_t *kvm_s390_dbf;
 33 #define KVM_EVENT(d_loglevel, d_string, d_args...)\
 34 do { \
 35         debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
 36           d_args); \
 37 } while (0)
 38 
 39 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
 40 do { \
 41         debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
 42           d_args); \
 43 } while (0)
 44 
 45 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
 46 do { \
 47         debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
 48           "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
 49           d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
 50           d_args); \
 51 } while (0)
 52 
 53 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
 54 {
 55         return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
 56 }
 57 
 58 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
 59 {
 60         return test_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
 61 }
 62 
 63 static inline int kvm_is_ucontrol(struct kvm *kvm)
 64 {
 65 #ifdef CONFIG_KVM_S390_UCONTROL
 66         if (kvm->arch.gmap)
 67                 return 0;
 68         return 1;
 69 #else
 70         return 0;
 71 #endif
 72 }
 73 
 74 #define GUEST_PREFIX_SHIFT 13
 75 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
 76 {
 77         return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
 78 }
 79 
 80 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
 81 {
 82         VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
 83                    prefix);
 84         vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
 85         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 86         kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
 87 }
 88 
 89 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
 90 {
 91         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
 92         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
 93 
 94         if (ar)
 95                 *ar = base2;
 96 
 97         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
 98 }
 99 
100 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
101                                               u64 *address1, u64 *address2,
102                                               u8 *ar_b1, u8 *ar_b2)
103 {
104         u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
105         u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
106         u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
107         u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
108 
109         *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
110         *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
111 
112         if (ar_b1)
113                 *ar_b1 = base1;
114         if (ar_b2)
115                 *ar_b2 = base2;
116 }
117 
118 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
119 {
120         if (r1)
121                 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
122         if (r2)
123                 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
124 }
125 
126 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
127 {
128         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
129         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
130                         ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
131         /* The displacement is a 20bit _SIGNED_ value */
132         if (disp2 & 0x80000)
133                 disp2+=0xfff00000;
134 
135         if (ar)
136                 *ar = base2;
137 
138         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
139 }
140 
141 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
142 {
143         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
144         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
145 
146         if (ar)
147                 *ar = base2;
148 
149         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
150 }
151 
152 /* Set the condition code in the guest program status word */
153 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
154 {
155         vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
156         vcpu->arch.sie_block->gpsw.mask |= cc << 44;
157 }
158 
159 /* test availability of facility in a kvm instance */
160 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
161 {
162         return __test_facility(nr, kvm->arch.model.fac_mask) &&
163                 __test_facility(nr, kvm->arch.model.fac_list);
164 }
165 
166 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
167 {
168         unsigned char *ptr;
169 
170         if (nr >= MAX_FACILITY_BIT)
171                 return -EINVAL;
172         ptr = (unsigned char *) fac_list + (nr >> 3);
173         *ptr |= (0x80UL >> (nr & 7));
174         return 0;
175 }
176 
177 static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
178 {
179         WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
180         return test_bit_inv(nr, kvm->arch.cpu_feat);
181 }
182 
183 /* are cpu states controlled by user space */
184 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
185 {
186         return kvm->arch.user_cpu_state_ctrl != 0;
187 }
188 
189 /* implemented in interrupt.c */
190 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
191 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
192 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
193 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
194 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
195 void kvm_s390_clear_float_irqs(struct kvm *kvm);
196 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
197                                     struct kvm_s390_interrupt *s390int);
198 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
199                                       struct kvm_s390_irq *irq);
200 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
201                                            struct kvm_s390_pgm_info *pgm_info)
202 {
203         struct kvm_s390_irq irq = {
204                 .type = KVM_S390_PROGRAM_INT,
205                 .u.pgm = *pgm_info,
206         };
207 
208         return kvm_s390_inject_vcpu(vcpu, &irq);
209 }
210 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
211 {
212         struct kvm_s390_irq irq = {
213                 .type = KVM_S390_PROGRAM_INT,
214                 .u.pgm.code = code,
215         };
216 
217         return kvm_s390_inject_vcpu(vcpu, &irq);
218 }
219 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
220                                                     u64 isc_mask, u32 schid);
221 int kvm_s390_reinject_io_int(struct kvm *kvm,
222                              struct kvm_s390_interrupt_info *inti);
223 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
224 
225 /* implemented in intercept.c */
226 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
227 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
228 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
229 {
230         struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
231 
232         sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
233 }
234 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
235 {
236         kvm_s390_rewind_psw(vcpu, -ilen);
237 }
238 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
239 {
240         /* don't inject PER events if we re-execute the instruction */
241         vcpu->arch.sie_block->icptstatus &= ~0x02;
242         kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
243 }
244 
245 /* implemented in priv.c */
246 int is_valid_psw(psw_t *psw);
247 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
248 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
249 int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
250 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
251 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
252 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
253 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
254 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
255 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
256 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
257 int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
258 
259 /* implemented in vsie.c */
260 int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
261 void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
262 void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
263                                  unsigned long end);
264 void kvm_s390_vsie_init(struct kvm *kvm);
265 void kvm_s390_vsie_destroy(struct kvm *kvm);
266 
267 /* implemented in sigp.c */
268 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
269 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
270 
271 /* implemented in sthyi.c */
272 int handle_sthyi(struct kvm_vcpu *vcpu);
273 
274 /* implemented in kvm-s390.c */
275 void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod);
276 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
277 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
278 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
279 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
280 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
281 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
282 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
283 void exit_sie(struct kvm_vcpu *vcpu);
284 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
285 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
286 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
287 unsigned long kvm_s390_fac_list_mask_size(void);
288 extern unsigned long kvm_s390_fac_list_mask[];
289 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
290 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
291 
292 /* implemented in diag.c */
293 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
294 
295 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
296 {
297         int i;
298         struct kvm_vcpu *vcpu;
299 
300         WARN_ON(!mutex_is_locked(&kvm->lock));
301         kvm_for_each_vcpu(i, vcpu, kvm)
302                 kvm_s390_vcpu_block(vcpu);
303 }
304 
305 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
306 {
307         int i;
308         struct kvm_vcpu *vcpu;
309 
310         kvm_for_each_vcpu(i, vcpu, kvm)
311                 kvm_s390_vcpu_unblock(vcpu);
312 }
313 
314 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
315 {
316         u64 rc;
317 
318         preempt_disable();
319         rc = get_tod_clock_fast() + kvm->arch.epoch;
320         preempt_enable();
321         return rc;
322 }
323 
324 /**
325  * kvm_s390_inject_prog_cond - conditionally inject a program check
326  * @vcpu: virtual cpu
327  * @rc: original return/error code
328  *
329  * This function is supposed to be used after regular guest access functions
330  * failed, to conditionally inject a program check to a vcpu. The typical
331  * pattern would look like
332  *
333  * rc = write_guest(vcpu, addr, data, len);
334  * if (rc)
335  *      return kvm_s390_inject_prog_cond(vcpu, rc);
336  *
337  * A negative return code from guest access functions implies an internal error
338  * like e.g. out of memory. In these cases no program check should be injected
339  * to the guest.
340  * A positive value implies that an exception happened while accessing a guest's
341  * memory. In this case all data belonging to the corresponding program check
342  * has been stored in vcpu->arch.pgm and can be injected with
343  * kvm_s390_inject_prog_irq().
344  *
345  * Returns: - the original @rc value if @rc was negative (internal error)
346  *          - zero if @rc was already zero
347  *          - zero or error code from injecting if @rc was positive
348  *            (program check injected to @vcpu)
349  */
350 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
351 {
352         if (rc <= 0)
353                 return rc;
354         return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
355 }
356 
357 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
358                         struct kvm_s390_irq *s390irq);
359 
360 /* implemented in interrupt.c */
361 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
362 int psw_extint_disabled(struct kvm_vcpu *vcpu);
363 void kvm_s390_destroy_adapters(struct kvm *kvm);
364 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
365 extern struct kvm_device_ops kvm_flic_ops;
366 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
367 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
368 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
369                            void __user *buf, int len);
370 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
371                            __u8 __user *buf, int len);
372 
373 /* implemented in guestdbg.c */
374 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
375 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
376 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
377 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
378                             struct kvm_guest_debug *dbg);
379 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
380 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
381 int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
382 int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
383 
384 /* support for Basic/Extended SCA handling */
385 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
386 {
387         struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
388 
389         return &sca->ipte_control;
390 }
391 static inline int kvm_s390_use_sca_entries(void)
392 {
393         /*
394          * Without SIGP interpretation, only SRS interpretation (if available)
395          * might use the entries. By not setting the entries and keeping them
396          * invalid, hardware will not access them but intercept.
397          */
398         return sclp.has_sigpif;
399 }
400 #endif
401 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp