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 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ 31 do { \ 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...)\ 37 do { \ 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) 43 44 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu) 45 { 46 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED; 47 } 48 49 static 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 } 59 60 #define GUEST_PREFIX_SHIFT 13 61 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) 62 { 63 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; 64 } 65 66 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) 67 { 68 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; 69 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 70 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); 71 } 72 73 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu) 74 { 75 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 76 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 77 78 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 79 } 80 81 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, 82 u64 *address1, u64 *address2) 83 { 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; 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 93 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) 94 { 95 if (r1) 96 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; 97 if (r2) 98 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; 99 } 100 101 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu) 102 { 103 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 104 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 105 ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 106 /* The displacement is a 20bit _SIGNED_ value */ 107 if (disp2 & 0x80000) 108 disp2+=0xfff00000; 109 110 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; 111 } 112 113 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu) 114 { 115 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 116 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 117 118 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 119 } 120 121 /* Set the condition code in the guest program status word */ 122 static 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 } 127 128 /* test availability of facility in a kvm intance */ 129 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr) 130 { 131 return __test_facility(nr, kvm->arch.model.fac->mask) && 132 __test_facility(nr, kvm->arch.model.fac->list); 133 } 134 135 /* are cpu states controlled by user space */ 136 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) 137 { 138 return kvm->arch.user_cpu_state_ctrl != 0; 139 } 140 141 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 142 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); 143 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 144 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 145 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 146 void kvm_s390_clear_float_irqs(struct kvm *kvm); 147 int __must_check kvm_s390_inject_vm(struct kvm *kvm, 148 struct kvm_s390_interrupt *s390int); 149 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 150 struct kvm_s390_irq *irq); 151 int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code); 152 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 153 u64 cr6, u64 schid); 154 void kvm_s390_reinject_io_int(struct kvm *kvm, 155 struct kvm_s390_interrupt_info *inti); 156 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 157 158 /* implemented in intercept.c */ 159 void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilc); 160 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); 161 162 /* implemented in priv.c */ 163 int is_valid_psw(psw_t *psw); 164 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 165 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); 166 int kvm_s390_handle_01(struct kvm_vcpu *vcpu); 167 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); 168 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); 169 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); 170 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); 171 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); 172 173 /* implemented in sigp.c */ 174 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 175 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); 176 177 /* implemented in kvm-s390.c */ 178 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); 179 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); 180 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 181 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 182 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 183 void s390_vcpu_block(struct kvm_vcpu *vcpu); 184 void s390_vcpu_unblock(struct kvm_vcpu *vcpu); 185 void exit_sie(struct kvm_vcpu *vcpu); 186 void exit_sie_sync(struct kvm_vcpu *vcpu); 187 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 188 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 189 /* is cmma enabled */ 190 bool kvm_s390_cmma_enabled(struct kvm *kvm); 191 unsigned long kvm_s390_fac_list_mask_size(void); 192 extern unsigned long kvm_s390_fac_list_mask[]; 193 194 /* implemented in diag.c */ 195 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 196 /* implemented in interrupt.c */ 197 int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 198 struct kvm_s390_pgm_info *pgm_info); 199 200 /** 201 * kvm_s390_inject_prog_cond - conditionally inject a program check 202 * @vcpu: virtual cpu 203 * @rc: original return/error code 204 * 205 * This function is supposed to be used after regular guest access functions 206 * failed, to conditionally inject a program check to a vcpu. The typical 207 * pattern would look like 208 * 209 * rc = write_guest(vcpu, addr, data, len); 210 * if (rc) 211 * return kvm_s390_inject_prog_cond(vcpu, rc); 212 * 213 * A negative return code from guest access functions implies an internal error 214 * like e.g. out of memory. In these cases no program check should be injected 215 * to the guest. 216 * A positive value implies that an exception happened while accessing a guest's 217 * memory. In this case all data belonging to the corresponding program check 218 * has been stored in vcpu->arch.pgm and can be injected with 219 * kvm_s390_inject_prog_irq(). 220 * 221 * Returns: - the original @rc value if @rc was negative (internal error) 222 * - zero if @rc was already zero 223 * - zero or error code from injecting if @rc was positive 224 * (program check injected to @vcpu) 225 */ 226 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) 227 { 228 if (rc <= 0) 229 return rc; 230 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 231 } 232 233 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, 234 struct kvm_s390_irq *s390irq); 235 236 /* implemented in interrupt.c */ 237 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop); 238 int psw_extint_disabled(struct kvm_vcpu *vcpu); 239 void kvm_s390_destroy_adapters(struct kvm *kvm); 240 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu); 241 extern struct kvm_device_ops kvm_flic_ops; 242 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu); 243 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu); 244 245 /* implemented in guestdbg.c */ 246 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 247 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 248 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 249 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 250 struct kvm_guest_debug *dbg); 251 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 252 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 253 void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 254 255 #endif 256