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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
24typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
25
26/* Transactional Memory Execution related macros */
27#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10))
28#define TDB_FORMAT1 1
29#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
30
31extern debug_info_t *kvm_s390_dbf;
32#define KVM_EVENT(d_loglevel, d_string, d_args...)\
33do { \
34 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
35 d_args); \
36} while (0)
37
38#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
39do { \
40 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
41 d_args); \
42} while (0)
43
44#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
45do { \
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,\
49 d_args); \
50} while (0)
51
52static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
53{
54 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
55}
56
57static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
58{
59 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_WAIT;
60}
61
62static inline int kvm_is_ucontrol(struct kvm *kvm)
63{
64#ifdef CONFIG_KVM_S390_UCONTROL
65 if (kvm->arch.gmap)
66 return 0;
67 return 1;
68#else
69 return 0;
70#endif
71}
72
73#define GUEST_PREFIX_SHIFT 13
74static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
75{
76 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
77}
78
79static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
80{
81 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
82 prefix);
83 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
84 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
85 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
86}
87
88typedef u8 __bitwise ar_t;
89
90static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, ar_t *ar)
91{
92 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
93 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
94
95 if (ar)
96 *ar = base2;
97
98 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
99}
100
101static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
102 u64 *address1, u64 *address2,
103 ar_t *ar_b1, ar_t *ar_b2)
104{
105 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
106 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
107 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
108 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
109
110 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
111 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
112
113 if (ar_b1)
114 *ar_b1 = base1;
115 if (ar_b2)
116 *ar_b2 = base2;
117}
118
119static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
120{
121 if (r1)
122 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
123 if (r2)
124 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
125}
126
127static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, ar_t *ar)
128{
129 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
130 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
131 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
132 /* The displacement is a 20bit _SIGNED_ value */
133 if (disp2 & 0x80000)
134 disp2+=0xfff00000;
135
136 if (ar)
137 *ar = base2;
138
139 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
140}
141
142static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, ar_t *ar)
143{
144 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
145 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
146
147 if (ar)
148 *ar = base2;
149
150 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
151}
152
153/* Set the condition code in the guest program status word */
154static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
155{
156 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
157 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
158}
159
160/* test availability of facility in a kvm instance */
161static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
162{
163 return __test_facility(nr, kvm->arch.model.fac_mask) &&
164 __test_facility(nr, kvm->arch.model.fac_list);
165}
166
167static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
168{
169 unsigned char *ptr;
170
171 if (nr >= MAX_FACILITY_BIT)
172 return -EINVAL;
173 ptr = (unsigned char *) fac_list + (nr >> 3);
174 *ptr |= (0x80UL >> (nr & 7));
175 return 0;
176}
177
178/* are cpu states controlled by user space */
179static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
180{
181 return kvm->arch.user_cpu_state_ctrl != 0;
182}
183
184/* implemented in interrupt.c */
185int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
186void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
187enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
188int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
189void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
190void kvm_s390_clear_float_irqs(struct kvm *kvm);
191int __must_check kvm_s390_inject_vm(struct kvm *kvm,
192 struct kvm_s390_interrupt *s390int);
193int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
194 struct kvm_s390_irq *irq);
195static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
196 struct kvm_s390_pgm_info *pgm_info)
197{
198 struct kvm_s390_irq irq = {
199 .type = KVM_S390_PROGRAM_INT,
200 .u.pgm = *pgm_info,
201 };
202
203 return kvm_s390_inject_vcpu(vcpu, &irq);
204}
205static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
206{
207 struct kvm_s390_irq irq = {
208 .type = KVM_S390_PROGRAM_INT,
209 .u.pgm.code = code,
210 };
211
212 return kvm_s390_inject_vcpu(vcpu, &irq);
213}
214struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
215 u64 isc_mask, u32 schid);
216int kvm_s390_reinject_io_int(struct kvm *kvm,
217 struct kvm_s390_interrupt_info *inti);
218int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
219
220/* implemented in intercept.c */
221u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
222int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
223static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
224{
225 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
226
227 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
228}
229static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
230{
231 kvm_s390_rewind_psw(vcpu, -ilen);
232}
233static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
234{
235 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
236}
237
238/* implemented in priv.c */
239int is_valid_psw(psw_t *psw);
240int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
241int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
242int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
243int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
244int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
245int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
246int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
247int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
248
249/* implemented in sigp.c */
250int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
251int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
252
253/* implemented in kvm-s390.c */
254void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod);
255long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
256int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
257int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu,
258 unsigned long addr);
259int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
260int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr);
261void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
262void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
263void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
264void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
265void exit_sie(struct kvm_vcpu *vcpu);
266void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
267int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
268void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
269unsigned long kvm_s390_fac_list_mask_size(void);
270extern unsigned long kvm_s390_fac_list_mask[];
271void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
272__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
273
274/* implemented in diag.c */
275int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
276
277static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
278{
279 int i;
280 struct kvm_vcpu *vcpu;
281
282 WARN_ON(!mutex_is_locked(&kvm->lock));
283 kvm_for_each_vcpu(i, vcpu, kvm)
284 kvm_s390_vcpu_block(vcpu);
285}
286
287static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
288{
289 int i;
290 struct kvm_vcpu *vcpu;
291
292 kvm_for_each_vcpu(i, vcpu, kvm)
293 kvm_s390_vcpu_unblock(vcpu);
294}
295
296static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
297{
298 u64 rc;
299
300 preempt_disable();
301 rc = get_tod_clock_fast() + kvm->arch.epoch;
302 preempt_enable();
303 return rc;
304}
305
306/**
307 * kvm_s390_inject_prog_cond - conditionally inject a program check
308 * @vcpu: virtual cpu
309 * @rc: original return/error code
310 *
311 * This function is supposed to be used after regular guest access functions
312 * failed, to conditionally inject a program check to a vcpu. The typical
313 * pattern would look like
314 *
315 * rc = write_guest(vcpu, addr, data, len);
316 * if (rc)
317 * return kvm_s390_inject_prog_cond(vcpu, rc);
318 *
319 * A negative return code from guest access functions implies an internal error
320 * like e.g. out of memory. In these cases no program check should be injected
321 * to the guest.
322 * A positive value implies that an exception happened while accessing a guest's
323 * memory. In this case all data belonging to the corresponding program check
324 * has been stored in vcpu->arch.pgm and can be injected with
325 * kvm_s390_inject_prog_irq().
326 *
327 * Returns: - the original @rc value if @rc was negative (internal error)
328 * - zero if @rc was already zero
329 * - zero or error code from injecting if @rc was positive
330 * (program check injected to @vcpu)
331 */
332static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
333{
334 if (rc <= 0)
335 return rc;
336 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
337}
338
339int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
340 struct kvm_s390_irq *s390irq);
341
342/* implemented in interrupt.c */
343int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
344int psw_extint_disabled(struct kvm_vcpu *vcpu);
345void kvm_s390_destroy_adapters(struct kvm *kvm);
346int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
347extern struct kvm_device_ops kvm_flic_ops;
348int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
349void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
350int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
351 void __user *buf, int len);
352int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
353 __u8 __user *buf, int len);
354
355/* implemented in guestdbg.c */
356void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
357void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
358void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
359int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
360 struct kvm_guest_debug *dbg);
361void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
362void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
363void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
364
365/* support for Basic/Extended SCA handling */
366static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
367{
368 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
369
370 return &sca->ipte_control;
371}
372#endif
1/*
2 * kvm_s390.h - 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
22/* The current code can have up to 256 pages for virtio */
23#define VIRTIODESCSPACE (256ul * 4096ul)
24
25typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
26
27/* negativ values are error codes, positive values for internal conditions */
28#define SIE_INTERCEPT_RERUNVCPU (1<<0)
29#define SIE_INTERCEPT_UCONTROL (1<<1)
30int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
31
32#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
33do { \
34 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
35 d_args); \
36} while (0)
37
38#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
39do { \
40 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
41 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
42 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
43 d_args); \
44} while (0)
45
46static inline int __cpu_is_stopped(struct kvm_vcpu *vcpu)
47{
48 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT;
49}
50
51static inline int kvm_is_ucontrol(struct kvm *kvm)
52{
53#ifdef CONFIG_KVM_S390_UCONTROL
54 if (kvm->arch.gmap)
55 return 0;
56 return 1;
57#else
58 return 0;
59#endif
60}
61
62static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
63{
64 vcpu->arch.sie_block->prefix = prefix & 0x7fffe000u;
65 vcpu->arch.sie_block->ihcpu = 0xffff;
66}
67
68int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
69enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
70void kvm_s390_tasklet(unsigned long parm);
71void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
72int kvm_s390_inject_vm(struct kvm *kvm,
73 struct kvm_s390_interrupt *s390int);
74int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
75 struct kvm_s390_interrupt *s390int);
76int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
77int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action);
78
79/* implemented in priv.c */
80int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
81int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
82int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
83
84/* implemented in sigp.c */
85int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
86
87/* implemented in kvm-s390.c */
88int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu,
89 unsigned long addr);
90/* implemented in diag.c */
91int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
92
93#endif