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