2 * definition for kvm on s390
4 * Copyright IBM Corp. 2008, 2009
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.
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
11 * Christian Borntraeger <borntraeger@de.ibm.com>
12 * Christian Ehrhardt <ehrhardt@de.ibm.com>
15 #ifndef ARCH_S390_KVM_S390_H
16 #define ARCH_S390_KVM_S390_H
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>
24 typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
26 /* Transactional Memory Execution related macros */
27 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10))
29 #define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
31 extern debug_info_t *kvm_s390_dbf;
32 #define KVM_EVENT(d_loglevel, d_string, d_args...)\
34 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
38 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
40 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
44 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
46 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
47 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
48 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
52 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
54 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
57 static inline int kvm_is_ucontrol(struct kvm *kvm)
59 #ifdef CONFIG_KVM_S390_UCONTROL
68 #define GUEST_PREFIX_SHIFT 13
69 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
71 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
74 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
76 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
78 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
79 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
80 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
83 typedef u8 __bitwise ar_t;
85 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, ar_t *ar)
87 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
88 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
93 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
96 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
97 u64 *address1, u64 *address2,
98 ar_t *ar_b1, ar_t *ar_b2)
100 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
101 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
102 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
103 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
105 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
106 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
114 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
117 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
119 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
122 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, ar_t *ar)
124 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
125 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
126 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
127 /* The displacement is a 20bit _SIGNED_ value */
134 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
137 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, ar_t *ar)
139 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
140 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
145 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
148 /* Set the condition code in the guest program status word */
149 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
151 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
152 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
155 /* test availability of facility in a kvm instance */
156 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
158 return __test_facility(nr, kvm->arch.model.fac->mask) &&
159 __test_facility(nr, kvm->arch.model.fac->list);
162 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
166 if (nr >= MAX_FACILITY_BIT)
168 ptr = (unsigned char *) fac_list + (nr >> 3);
169 *ptr |= (0x80UL >> (nr & 7));
173 /* are cpu states controlled by user space */
174 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
176 return kvm->arch.user_cpu_state_ctrl != 0;
179 /* implemented in interrupt.c */
180 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
181 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
182 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
183 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
184 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
185 void kvm_s390_clear_float_irqs(struct kvm *kvm);
186 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
187 struct kvm_s390_interrupt *s390int);
188 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
189 struct kvm_s390_irq *irq);
190 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
191 struct kvm_s390_pgm_info *pgm_info)
193 struct kvm_s390_irq irq = {
194 .type = KVM_S390_PROGRAM_INT,
198 return kvm_s390_inject_vcpu(vcpu, &irq);
200 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
202 struct kvm_s390_irq irq = {
203 .type = KVM_S390_PROGRAM_INT,
207 return kvm_s390_inject_vcpu(vcpu, &irq);
209 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
210 u64 isc_mask, u32 schid);
211 int kvm_s390_reinject_io_int(struct kvm *kvm,
212 struct kvm_s390_interrupt_info *inti);
213 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
215 /* implemented in intercept.c */
216 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
217 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
218 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
220 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
222 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
224 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
226 kvm_s390_rewind_psw(vcpu, -ilen);
228 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
230 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
233 /* implemented in priv.c */
234 int is_valid_psw(psw_t *psw);
235 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
236 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
237 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
238 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
239 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
240 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
241 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
242 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
244 /* implemented in sigp.c */
245 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
246 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
248 /* implemented in kvm-s390.c */
249 void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod);
250 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
251 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
252 int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu,
254 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
255 int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr);
256 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
257 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
258 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
259 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
260 void exit_sie(struct kvm_vcpu *vcpu);
261 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
262 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
263 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
264 unsigned long kvm_s390_fac_list_mask_size(void);
265 extern unsigned long kvm_s390_fac_list_mask[];
267 /* implemented in diag.c */
268 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
270 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
273 struct kvm_vcpu *vcpu;
275 WARN_ON(!mutex_is_locked(&kvm->lock));
276 kvm_for_each_vcpu(i, vcpu, kvm)
277 kvm_s390_vcpu_block(vcpu);
280 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
283 struct kvm_vcpu *vcpu;
285 kvm_for_each_vcpu(i, vcpu, kvm)
286 kvm_s390_vcpu_unblock(vcpu);
289 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
294 rc = get_tod_clock_fast() + kvm->arch.epoch;
300 * kvm_s390_inject_prog_cond - conditionally inject a program check
302 * @rc: original return/error code
304 * This function is supposed to be used after regular guest access functions
305 * failed, to conditionally inject a program check to a vcpu. The typical
306 * pattern would look like
308 * rc = write_guest(vcpu, addr, data, len);
310 * return kvm_s390_inject_prog_cond(vcpu, rc);
312 * A negative return code from guest access functions implies an internal error
313 * like e.g. out of memory. In these cases no program check should be injected
315 * A positive value implies that an exception happened while accessing a guest's
316 * memory. In this case all data belonging to the corresponding program check
317 * has been stored in vcpu->arch.pgm and can be injected with
318 * kvm_s390_inject_prog_irq().
320 * Returns: - the original @rc value if @rc was negative (internal error)
321 * - zero if @rc was already zero
322 * - zero or error code from injecting if @rc was positive
323 * (program check injected to @vcpu)
325 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
329 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
332 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
333 struct kvm_s390_irq *s390irq);
335 /* implemented in interrupt.c */
336 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
337 int psw_extint_disabled(struct kvm_vcpu *vcpu);
338 void kvm_s390_destroy_adapters(struct kvm *kvm);
339 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
340 extern struct kvm_device_ops kvm_flic_ops;
341 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
342 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
343 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
344 void __user *buf, int len);
345 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
346 __u8 __user *buf, int len);
348 /* implemented in guestdbg.c */
349 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
350 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
351 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
352 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
353 struct kvm_guest_debug *dbg);
354 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
355 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
356 void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
358 /* support for Basic/Extended SCA handling */
359 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
361 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
363 return &sca->ipte_control;