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KVM: s390: handle stop irqs without action_bits
[linux-2.6-block.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
7feb6bb8
MM		 27/* Transactional Memory Execution related macros */
28#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10))
7feb6bb8
MM		 29#define TDB_FORMAT1 1
30#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
31
b0c632db
HC		 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)
ba5c1e9b 45
7a42fdc2 46static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
ba5c1e9b 47{
7a42fdc2 48 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
ba5c1e9b
CO		 49}
50
e08b9637
CO		 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}
8d26cf7b 61
fda902cb
MM		 62#define GUEST_PREFIX_SHIFT 13
63static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
64{
65 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
66}
67
8d26cf7b
CB		 68static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
69{
fda902cb 70 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
d3d692c8 71 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
2c70fe44 72 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
8d26cf7b
CB		 73}
74
b1c571a5
CH		 75static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu)
76{
0c29b229
CB		 77 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
78 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5
CH		 79
80 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
81}
82
83static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
84 u64 *address1, u64 *address2)
85{
0c29b229
CB		 86 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
87 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
88 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
89 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
b1c571a5
CH		 90
91 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
92 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
93}
94
69d0d3a3
CB		 95static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
96{
ff7158b2
TH		 97 if (r1)
98 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
99 if (r2)
100 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
69d0d3a3
CB		 101}
102
b1c571a5
CH		 103static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu)
104{
0c29b229
CB		 105 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
106 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
b1c571a5 107 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
0c29b229
CB		 108 /* The displacement is a 20bit _SIGNED_ value */
109 if (disp2 & 0x80000)
110 disp2+=0xfff00000;
b1c571a5 111
0c29b229 112 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
b1c571a5
CH		 113}
114
115static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu)
116{
0c29b229
CB		 117 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
118 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5
CH		 119
120 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
121}
122
ea828ebf
TH		 123/* Set the condition code in the guest program status word */
124static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
125{
126 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
127 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
128}
129
6352e4d2
DH		 130/* are cpu states controlled by user space */
131static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
132{
133 return kvm->arch.user_cpu_state_ctrl != 0;
134}
135
ba5c1e9b 136int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
0e9c85a5 137void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
ca872302 138enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
614aeab4 139int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
2ed10cc1 140void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
67335e63 141void kvm_s390_clear_float_irqs(struct kvm *kvm);
db4a29cb
HC		 142int __must_check kvm_s390_inject_vm(struct kvm *kvm,
143 struct kvm_s390_interrupt *s390int);
144int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
383d0b05 145 struct kvm_s390_irq *irq);
db4a29cb 146int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
fa6b7fe9
CH		 147struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
148 u64 cr6, u64 schid);
2f32d4ea
CH		 149void kvm_s390_reinject_io_int(struct kvm *kvm,
150 struct kvm_s390_interrupt_info *inti);
841b91c5 151int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
453423dc 152
04b41acd
TH		 153/* implemented in intercept.c */
154void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilc);
155int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
156
453423dc 157/* implemented in priv.c */
a3fb577e 158int is_valid_psw(psw_t *psw);
70455a36 159int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
bb25b9ba 160int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
8c3f61e2 161int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
48a3e950
CH		 162int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
163int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
aba07508 164int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
953ed88d
TH		 165int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
166int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
5288fbf0
CB		 167
168/* implemented in sigp.c */
169int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
4953919f 170int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
5288fbf0
CB		 171
172/* implemented in kvm-s390.c */
fa576c58 173long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
e879892c
TH		 174int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
175int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
6852d7b6
DH		 176void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
177void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
49b99e1e
CB		 178void s390_vcpu_block(struct kvm_vcpu *vcpu);
179void s390_vcpu_unblock(struct kvm_vcpu *vcpu);
180void exit_sie(struct kvm_vcpu *vcpu);
181void exit_sie_sync(struct kvm_vcpu *vcpu);
b31605c1
DD		 182int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
183void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
184/* is cmma enabled */
185bool kvm_s390_cmma_enabled(struct kvm *kvm);
280ef0f1 186int test_vfacility(unsigned long nr);
b31605c1 187
e28acfea
CB		 188/* implemented in diag.c */
189int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
bcd84683
JF		 190/* implemented in interrupt.c */
191int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
192 struct kvm_s390_pgm_info *pgm_info);
e28acfea 193
1b0462e5
HC		 194/**
195 * kvm_s390_inject_prog_cond - conditionally inject a program check
196 * @vcpu: virtual cpu
197 * @rc: original return/error code
198 *
199 * This function is supposed to be used after regular guest access functions
200 * failed, to conditionally inject a program check to a vcpu. The typical
201 * pattern would look like
202 *
203 * rc = write_guest(vcpu, addr, data, len);
204 * if (rc)
205 * return kvm_s390_inject_prog_cond(vcpu, rc);
206 *
207 * A negative return code from guest access functions implies an internal error
208 * like e.g. out of memory. In these cases no program check should be injected
209 * to the guest.
210 * A positive value implies that an exception happened while accessing a guest's
211 * memory. In this case all data belonging to the corresponding program check
212 * has been stored in vcpu->arch.pgm and can be injected with
213 * kvm_s390_inject_prog_irq().
214 *
215 * Returns: - the original @rc value if @rc was negative (internal error)
216 * - zero if @rc was already zero
217 * - zero or error code from injecting if @rc was positive
218 * (program check injected to @vcpu)
219 */
220static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
221{
222 if (rc <= 0)
223 return rc;
224 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
225}
226
383d0b05
JF		 227int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
228 struct kvm_s390_irq *s390irq);
229
3c038e6b
DD		 230/* implemented in interrupt.c */
231int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
232int psw_extint_disabled(struct kvm_vcpu *vcpu);
841b91c5 233void kvm_s390_destroy_adapters(struct kvm *kvm);
4953919f 234int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu);
84877d93 235extern struct kvm_device_ops kvm_flic_ops;
6cddd432
DH		 236int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
237void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
3c038e6b 238
27291e21
DH		 239/* implemented in guestdbg.c */
240void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
241void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
242void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
243int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
244 struct kvm_guest_debug *dbg);
245void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
246void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
247void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
248
b0c632db 249#endif
Linux 6.x block layer and io_uring tree(s)