arch/s390/kvm/kvm-s390.h

   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