1 /* SPDX-License-Identifier: GPL-2.0 */
3 * definition for kvm on s390
5 * Copyright IBM Corp. 2008, 2009
7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 * Christian Borntraeger <borntraeger@de.ibm.com>
9 * Christian Ehrhardt <ehrhardt@de.ibm.com>
12 #ifndef ARCH_S390_KVM_S390_H
13 #define ARCH_S390_KVM_S390_H
15 #include <linux/hrtimer.h>
16 #include <linux/kvm.h>
17 #include <linux/kvm_host.h>
18 #include <asm/facility.h>
19 #include <asm/processor.h>
22 /* Transactional Memory Execution related macros */
23 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE))
25 #define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
27 extern debug_info_t *kvm_s390_dbf;
28 #define KVM_EVENT(d_loglevel, d_string, d_args...)\
30 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
34 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
36 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
40 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
42 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
43 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
44 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
48 static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
50 atomic_or(flags, &vcpu->arch.sie_block->cpuflags);
53 static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
55 atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags);
58 static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
60 return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags;
63 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
65 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED);
68 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
70 return test_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
73 static inline int kvm_is_ucontrol(struct kvm *kvm)
75 #ifdef CONFIG_KVM_S390_UCONTROL
84 #define GUEST_PREFIX_SHIFT 13
85 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
87 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
90 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
92 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
94 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
95 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
96 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
99 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
101 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
102 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
107 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
110 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
111 u64 *address1, u64 *address2,
112 u8 *ar_b1, u8 *ar_b2)
114 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
115 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
116 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
117 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
119 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
120 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
128 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
131 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
133 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
136 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
138 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
139 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
140 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
141 /* The displacement is a 20bit _SIGNED_ value */
148 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
151 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
153 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
154 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
159 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
162 /* Set the condition code in the guest program status word */
163 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
165 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
166 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
169 /* test availability of facility in a kvm instance */
170 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
172 return __test_facility(nr, kvm->arch.model.fac_mask) &&
173 __test_facility(nr, kvm->arch.model.fac_list);
176 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
180 if (nr >= MAX_FACILITY_BIT)
182 ptr = (unsigned char *) fac_list + (nr >> 3);
183 *ptr |= (0x80UL >> (nr & 7));
187 static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
189 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
190 return test_bit_inv(nr, kvm->arch.cpu_feat);
193 /* are cpu states controlled by user space */
194 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
196 return kvm->arch.user_cpu_state_ctrl != 0;
199 /* implemented in interrupt.c */
200 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
201 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
202 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
203 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
204 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
205 void kvm_s390_clear_float_irqs(struct kvm *kvm);
206 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
207 struct kvm_s390_interrupt *s390int);
208 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
209 struct kvm_s390_irq *irq);
210 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
211 struct kvm_s390_pgm_info *pgm_info)
213 struct kvm_s390_irq irq = {
214 .type = KVM_S390_PROGRAM_INT,
218 return kvm_s390_inject_vcpu(vcpu, &irq);
220 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
222 struct kvm_s390_irq irq = {
223 .type = KVM_S390_PROGRAM_INT,
227 return kvm_s390_inject_vcpu(vcpu, &irq);
229 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
230 u64 isc_mask, u32 schid);
231 int kvm_s390_reinject_io_int(struct kvm *kvm,
232 struct kvm_s390_interrupt_info *inti);
233 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
235 /* implemented in intercept.c */
236 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
237 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
238 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
240 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
242 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
244 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
246 kvm_s390_rewind_psw(vcpu, -ilen);
248 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
250 /* don't inject PER events if we re-execute the instruction */
251 vcpu->arch.sie_block->icptstatus &= ~0x02;
252 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
255 int handle_sthyi(struct kvm_vcpu *vcpu);
257 /* implemented in priv.c */
258 int is_valid_psw(psw_t *psw);
259 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
260 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
261 int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
262 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
263 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
264 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
265 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
266 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
267 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
268 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
269 int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
271 /* implemented in vsie.c */
272 int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
273 void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
274 void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
276 void kvm_s390_vsie_init(struct kvm *kvm);
277 void kvm_s390_vsie_destroy(struct kvm *kvm);
279 /* implemented in sigp.c */
280 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
281 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
283 /* implemented in kvm-s390.c */
284 void kvm_s390_set_tod_clock(struct kvm *kvm,
285 const struct kvm_s390_vm_tod_clock *gtod);
286 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
287 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
288 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
289 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
290 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
291 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
292 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
293 void exit_sie(struct kvm_vcpu *vcpu);
294 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
295 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
296 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
297 unsigned long kvm_s390_fac_list_mask_size(void);
298 extern unsigned long kvm_s390_fac_list_mask[];
299 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
300 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
302 /* implemented in diag.c */
303 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
305 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
308 struct kvm_vcpu *vcpu;
310 WARN_ON(!mutex_is_locked(&kvm->lock));
311 kvm_for_each_vcpu(i, vcpu, kvm)
312 kvm_s390_vcpu_block(vcpu);
315 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
318 struct kvm_vcpu *vcpu;
320 kvm_for_each_vcpu(i, vcpu, kvm)
321 kvm_s390_vcpu_unblock(vcpu);
324 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
329 rc = get_tod_clock_fast() + kvm->arch.epoch;
335 * kvm_s390_inject_prog_cond - conditionally inject a program check
337 * @rc: original return/error code
339 * This function is supposed to be used after regular guest access functions
340 * failed, to conditionally inject a program check to a vcpu. The typical
341 * pattern would look like
343 * rc = write_guest(vcpu, addr, data, len);
345 * return kvm_s390_inject_prog_cond(vcpu, rc);
347 * A negative return code from guest access functions implies an internal error
348 * like e.g. out of memory. In these cases no program check should be injected
350 * A positive value implies that an exception happened while accessing a guest's
351 * memory. In this case all data belonging to the corresponding program check
352 * has been stored in vcpu->arch.pgm and can be injected with
353 * kvm_s390_inject_prog_irq().
355 * Returns: - the original @rc value if @rc was negative (internal error)
356 * - zero if @rc was already zero
357 * - zero or error code from injecting if @rc was positive
358 * (program check injected to @vcpu)
360 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
364 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
367 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
368 struct kvm_s390_irq *s390irq);
370 /* implemented in interrupt.c */
371 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
372 int psw_extint_disabled(struct kvm_vcpu *vcpu);
373 void kvm_s390_destroy_adapters(struct kvm *kvm);
374 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
375 extern struct kvm_device_ops kvm_flic_ops;
376 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
377 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
378 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
379 void __user *buf, int len);
380 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
381 __u8 __user *buf, int len);
382 void kvm_s390_gisa_init(struct kvm *kvm);
383 void kvm_s390_gisa_clear(struct kvm *kvm);
384 void kvm_s390_gisa_destroy(struct kvm *kvm);
386 /* implemented in guestdbg.c */
387 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
388 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
389 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
390 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
391 struct kvm_guest_debug *dbg);
392 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
393 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
394 int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
395 int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
397 /* support for Basic/Extended SCA handling */
398 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
400 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
402 return &sca->ipte_control;
404 static inline int kvm_s390_use_sca_entries(void)
407 * Without SIGP interpretation, only SRS interpretation (if available)
408 * might use the entries. By not setting the entries and keeping them
409 * invalid, hardware will not access them but intercept.
411 return sclp.has_sigpif;
413 void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
414 struct mcck_volatile_info *mcck_info);