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KVM: s390: Fix low-address protection for real addresses
[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 20#include <linux/kvm_host.h>
9d8d5786 21#include <asm/facility.h>
8f2abe6a
CB		 22
23typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
24
7feb6bb8
MM		 25/* Transactional Memory Execution related macros */
26#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10))
7feb6bb8
MM		 27#define TDB_FORMAT1 1
28#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
29
b0c632db
HC		 30#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
31do { \
32 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
33 d_args); \
34} while (0)
35
36#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
37do { \
38 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
39 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
40 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
41 d_args); \
42} while (0)
ba5c1e9b 43
7a42fdc2 44static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
ba5c1e9b 45{
7a42fdc2 46 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
ba5c1e9b
CO		 47}
48
e08b9637
CO		 49static inline int kvm_is_ucontrol(struct kvm *kvm)
50{
51#ifdef CONFIG_KVM_S390_UCONTROL
52 if (kvm->arch.gmap)
53 return 0;
54 return 1;
55#else
56 return 0;
57#endif
58}
8d26cf7b 59
fda902cb
MM		 60#define GUEST_PREFIX_SHIFT 13
61static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
62{
63 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
64}
65
8d26cf7b
CB		 66static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
67{
fda902cb 68 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
d3d692c8 69 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
2c70fe44 70 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
8d26cf7b
CB		 71}
72
b1c571a5
CH		 73static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu)
74{
0c29b229
CB		 75 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
76 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5
CH		 77
78 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
79}
80
81static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
82 u64 *address1, u64 *address2)
83{
0c29b229
CB		 84 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
85 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
86 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
87 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
b1c571a5
CH		 88
89 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
90 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
91}
92
69d0d3a3
CB		 93static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
94{
ff7158b2
TH		 95 if (r1)
96 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
97 if (r2)
98 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
69d0d3a3
CB		 99}
100
b1c571a5
CH		 101static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu)
102{
0c29b229
CB		 103 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
104 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
b1c571a5 105 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
0c29b229
CB		 106 /* The displacement is a 20bit _SIGNED_ value */
107 if (disp2 & 0x80000)
108 disp2+=0xfff00000;
b1c571a5 109
0c29b229 110 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
b1c571a5
CH		 111}
112
113static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu)
114{
0c29b229
CB		 115 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
116 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
b1c571a5
CH		 117
118 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
119}
120
ea828ebf
TH		 121/* Set the condition code in the guest program status word */
122static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
123{
124 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
125 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
126}
127
1e8d2424 128/* test availability of facility in a kvm instance */
9d8d5786
MM		 129static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
130{
981467c9
MM		 131 return __test_facility(nr, kvm->arch.model.fac->mask) &&
132 __test_facility(nr, kvm->arch.model.fac->list);
9d8d5786
MM		 133}
134
6352e4d2
DH		 135/* are cpu states controlled by user space */
136static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
137{
138 return kvm->arch.user_cpu_state_ctrl != 0;
139}
140
ba5c1e9b 141int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
0e9c85a5 142void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
ca872302 143enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
614aeab4 144int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
2ed10cc1 145void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
67335e63 146void kvm_s390_clear_float_irqs(struct kvm *kvm);
db4a29cb
HC		 147int __must_check kvm_s390_inject_vm(struct kvm *kvm,
148 struct kvm_s390_interrupt *s390int);
149int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
383d0b05 150 struct kvm_s390_irq *irq);
db4a29cb 151int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
fa6b7fe9
CH		 152struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
153 u64 cr6, u64 schid);
15462e37
DH		 154int kvm_s390_reinject_io_int(struct kvm *kvm,
155 struct kvm_s390_interrupt_info *inti);
841b91c5 156int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
453423dc 157
04b41acd
TH		 158/* implemented in intercept.c */
159void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilc);
160int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
161
453423dc 162/* implemented in priv.c */
a3fb577e 163int is_valid_psw(psw_t *psw);
70455a36 164int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
bb25b9ba 165int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
8c3f61e2 166int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
48a3e950
CH		 167int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
168int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
aba07508 169int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
953ed88d
TH		 170int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
171int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
5288fbf0
CB		 172
173/* implemented in sigp.c */
174int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
4953919f 175int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
5288fbf0
CB		 176
177/* implemented in kvm-s390.c */
fa576c58 178long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
e879892c 179int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
bc17de7c
EF		 180int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu,
181 unsigned long addr);
e879892c 182int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
bc17de7c 183int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr);
6852d7b6
DH		 184void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
185void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
49b99e1e
CB		 186void s390_vcpu_block(struct kvm_vcpu *vcpu);
187void s390_vcpu_unblock(struct kvm_vcpu *vcpu);
188void exit_sie(struct kvm_vcpu *vcpu);
189void exit_sie_sync(struct kvm_vcpu *vcpu);
b31605c1
DD		 190int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
191void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
192/* is cmma enabled */
193bool kvm_s390_cmma_enabled(struct kvm *kvm);
9d8d5786
MM		 194unsigned long kvm_s390_fac_list_mask_size(void);
195extern unsigned long kvm_s390_fac_list_mask[];
b31605c1 196
e28acfea
CB		 197/* implemented in diag.c */
198int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
bcd84683
JF		 199/* implemented in interrupt.c */
200int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
201 struct kvm_s390_pgm_info *pgm_info);
e28acfea 202
1b0462e5
HC		 203/**
204 * kvm_s390_inject_prog_cond - conditionally inject a program check
205 * @vcpu: virtual cpu
206 * @rc: original return/error code
207 *
208 * This function is supposed to be used after regular guest access functions
209 * failed, to conditionally inject a program check to a vcpu. The typical
210 * pattern would look like
211 *
212 * rc = write_guest(vcpu, addr, data, len);
213 * if (rc)
214 * return kvm_s390_inject_prog_cond(vcpu, rc);
215 *
216 * A negative return code from guest access functions implies an internal error
217 * like e.g. out of memory. In these cases no program check should be injected
218 * to the guest.
219 * A positive value implies that an exception happened while accessing a guest's
220 * memory. In this case all data belonging to the corresponding program check
221 * has been stored in vcpu->arch.pgm and can be injected with
222 * kvm_s390_inject_prog_irq().
223 *
224 * Returns: - the original @rc value if @rc was negative (internal error)
225 * - zero if @rc was already zero
226 * - zero or error code from injecting if @rc was positive
227 * (program check injected to @vcpu)
228 */
229static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
230{
231 if (rc <= 0)
232 return rc;
233 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
234}
235
383d0b05
JF		 236int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
237 struct kvm_s390_irq *s390irq);
238
3c038e6b 239/* implemented in interrupt.c */
9a022067 240int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
3c038e6b 241int psw_extint_disabled(struct kvm_vcpu *vcpu);
841b91c5 242void kvm_s390_destroy_adapters(struct kvm *kvm);
ea5f4969 243int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
84877d93 244extern struct kvm_device_ops kvm_flic_ops;
6cddd432
DH		 245int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
246void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
3c038e6b 247
27291e21
DH		 248/* implemented in guestdbg.c */
249void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
250void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
251void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
252int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
253 struct kvm_guest_debug *dbg);
254void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
255void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
256void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
257
b0c632db 258#endif
Linux 6.x block layer and io_uring tree(s)