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KVM: s390: no timer interrupts when single-stepping a guest
[mirror_ubuntu-artful-kernel.git] / arch / s390 / kvm / kvm-s390.h
CommitLineData
b0c632db 1/*
a53c8fab 2 * definition for kvm on s390
b0c632db 3 *
a53c8fab 4 * Copyright IBM Corp. 2008, 2009
b0c632db
HC		 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>
628eb9b8 12 * Christian Ehrhardt <ehrhardt@de.ibm.com>
b0c632db
HC		 13 */
14
15#ifndef ARCH_S390_KVM_S390_H
16#define ARCH_S390_KVM_S390_H
8f2abe6a 17
ca872302 18#include <linux/hrtimer.h>
ba5c1e9b 19#include <linux/kvm.h>
8f2abe6a
CB		 20#include <linux/kvm_host.h>
21
22typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
23
78c4b59f
MM		 24/* declare vfacilities extern */
25extern unsigned long *vfacilities;
26
8f2abe6a
CB		 27int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
28
7feb6bb8
MM		 29/* Transactional Memory Execution related macros */
30#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10))
31#define TDB_ADDR 0x1800UL
32#define TDB_FORMAT1 1
33#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
34
b0c632db
HC		 35#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
36do { \
37 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
38 d_args); \
39} while (0)
40
41#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
42do { \
43 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
44 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
45 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
46 d_args); \
47} while (0)
ba5c1e9b
CO		 48
49static inline int __cpu_is_stopped(struct kvm_vcpu *vcpu)
50{
51 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT;
52}
53
e08b9637
CO		 54static inline int kvm_is_ucontrol(struct kvm *kvm)
55{
56#ifdef CONFIG_KVM_S390_UCONTROL
57 if (kvm->arch.gmap)
58 return 0;
59 return 1;
60#else
61 return 0;
62#endif
63}
8d26cf7b
CB		 64
65static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
66{
67 vcpu->arch.sie_block->prefix = prefix & 0x7fffe000u;
68 vcpu->arch.sie_block->ihcpu = 0xffff;
2c70fe44 69 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
8d26cf7b
CB		 70}
71
b1c571a5
CH		 72static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu)
73{
0c29b229
CB		 74 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
75 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5
CH		 76
77 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
78}
79
80static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
81 u64 *address1, u64 *address2)
82{
0c29b229
CB		 83 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
84 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
85 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
86 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
b1c571a5
CH		 87
88 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
89 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
90}
91
69d0d3a3
CB		 92static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
93{
ff7158b2
TH		 94 if (r1)
95 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
96 if (r2)
97 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
69d0d3a3
CB		 98}
99
b1c571a5
CH		 100static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu)
101{
0c29b229
CB		 102 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
103 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
b1c571a5 104 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
0c29b229
CB		 105 /* The displacement is a 20bit _SIGNED_ value */
106 if (disp2 & 0x80000)
107 disp2+=0xfff00000;
b1c571a5 108
0c29b229 109 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
b1c571a5
CH		 110}
111
112static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu)
113{
0c29b229
CB		 114 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
115 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5
CH		 116
117 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
118}
119
ea828ebf
TH		 120/* Set the condition code in the guest program status word */
121static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
122{
123 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
124 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
125}
126
ba5c1e9b 127int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
ca872302
CB		 128enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
129void kvm_s390_tasklet(unsigned long parm);
ba5c1e9b 130void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
48a3e950 131void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu);
2ed10cc1 132void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
db4a29cb
HC		 133int __must_check kvm_s390_inject_vm(struct kvm *kvm,
134 struct kvm_s390_interrupt *s390int);
135int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
136 struct kvm_s390_interrupt *s390int);
137int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
fa6b7fe9
CH		 138struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
139 u64 cr6, u64 schid);
2f32d4ea
CH		 140void kvm_s390_reinject_io_int(struct kvm *kvm,
141 struct kvm_s390_interrupt_info *inti);
841b91c5 142int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
453423dc
CB		 143
144/* implemented in priv.c */
70455a36 145int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
bb25b9ba 146int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
8c3f61e2 147int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
48a3e950
CH		 148int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
149int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
aba07508 150int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
953ed88d
TH		 151int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
152int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
5288fbf0
CB		 153
154/* implemented in sigp.c */
155int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
156
157/* implemented in kvm-s390.c */
e879892c
TH		 158int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
159int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
49b99e1e
CB		 160void s390_vcpu_block(struct kvm_vcpu *vcpu);
161void s390_vcpu_unblock(struct kvm_vcpu *vcpu);
162void exit_sie(struct kvm_vcpu *vcpu);
163void exit_sie_sync(struct kvm_vcpu *vcpu);
b31605c1
DD		 164int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
165void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
166/* is cmma enabled */
167bool kvm_s390_cmma_enabled(struct kvm *kvm);
280ef0f1 168int test_vfacility(unsigned long nr);
b31605c1 169
e28acfea
CB		 170/* implemented in diag.c */
171int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
bcd84683
JF		 172/* implemented in interrupt.c */
173int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
174 struct kvm_s390_pgm_info *pgm_info);
e28acfea 175
1b0462e5
HC		 176/**
177 * kvm_s390_inject_prog_cond - conditionally inject a program check
178 * @vcpu: virtual cpu
179 * @rc: original return/error code
180 *
181 * This function is supposed to be used after regular guest access functions
182 * failed, to conditionally inject a program check to a vcpu. The typical
183 * pattern would look like
184 *
185 * rc = write_guest(vcpu, addr, data, len);
186 * if (rc)
187 * return kvm_s390_inject_prog_cond(vcpu, rc);
188 *
189 * A negative return code from guest access functions implies an internal error
190 * like e.g. out of memory. In these cases no program check should be injected
191 * to the guest.
192 * A positive value implies that an exception happened while accessing a guest's
193 * memory. In this case all data belonging to the corresponding program check
194 * has been stored in vcpu->arch.pgm and can be injected with
195 * kvm_s390_inject_prog_irq().
196 *
197 * Returns: - the original @rc value if @rc was negative (internal error)
198 * - zero if @rc was already zero
199 * - zero or error code from injecting if @rc was positive
200 * (program check injected to @vcpu)
201 */
202static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
203{
204 if (rc <= 0)
205 return rc;
206 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
207}
208
3c038e6b
DD		 209/* implemented in interrupt.c */
210int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
211int psw_extint_disabled(struct kvm_vcpu *vcpu);
841b91c5 212void kvm_s390_destroy_adapters(struct kvm *kvm);
3c038e6b 213
27291e21
DH		 214/* implemented in guestdbg.c */
215void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
216void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
217void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
218int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
219 struct kvm_guest_debug *dbg);
220void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
221void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
222void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
223
b0c632db 224#endif
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