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 22 typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu); 23 24 /* declare vfacilities extern */ 25 extern unsigned long *vfacilities; 26 27 /* Transactional Memory Execution related macros */ 28 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10)) 29 #define TDB_FORMAT1 1 30 #define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1)) 31 32 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ 33 do { \ 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...)\ 39 do { \ 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) 45 46 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu) 47 { 48 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED; 49 } 50 51 static 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 } 61 62 #define GUEST_PREFIX_SHIFT 13 63 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) 64 { 65 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; 66 } 67 68 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) 69 { 70 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; 71 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 72 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); 73 } 74 75 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu) 76 { 77 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 78 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 79 80 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 81 } 82 83 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, 84 u64 *address1, u64 *address2) 85 { 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; 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 95 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) 96 { 97 if (r1) 98 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; 99 if (r2) 100 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; 101 } 102 103 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu) 104 { 105 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 106 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 107 ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 108 /* The displacement is a 20bit _SIGNED_ value */ 109 if (disp2 & 0x80000) 110 disp2+=0xfff00000; 111 112 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; 113 } 114 115 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu) 116 { 117 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 118 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 119 120 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 121 } 122 123 /* Set the condition code in the guest program status word */ 124 static 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 } 129 130 /* are cpu states controlled by user space */ 131 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) 132 { 133 return kvm->arch.user_cpu_state_ctrl != 0; 134 } 135 136 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 137 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); 138 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 139 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 140 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 141 void kvm_s390_clear_float_irqs(struct kvm *kvm); 142 int __must_check kvm_s390_inject_vm(struct kvm *kvm, 143 struct kvm_s390_interrupt *s390int); 144 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 145 struct kvm_s390_irq *irq); 146 int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code); 147 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 148 u64 cr6, u64 schid); 149 void kvm_s390_reinject_io_int(struct kvm *kvm, 150 struct kvm_s390_interrupt_info *inti); 151 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 152 153 /* implemented in intercept.c */ 154 void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilc); 155 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); 156 157 /* implemented in priv.c */ 158 int is_valid_psw(psw_t *psw); 159 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 160 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); 161 int kvm_s390_handle_01(struct kvm_vcpu *vcpu); 162 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); 163 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); 164 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); 165 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); 166 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); 167 168 /* implemented in sigp.c */ 169 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 170 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); 171 172 /* implemented in kvm-s390.c */ 173 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); 174 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); 175 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 176 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 177 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 178 void s390_vcpu_block(struct kvm_vcpu *vcpu); 179 void s390_vcpu_unblock(struct kvm_vcpu *vcpu); 180 void exit_sie(struct kvm_vcpu *vcpu); 181 void exit_sie_sync(struct kvm_vcpu *vcpu); 182 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 183 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 184 /* is cmma enabled */ 185 bool kvm_s390_cmma_enabled(struct kvm *kvm); 186 int test_vfacility(unsigned long nr); 187 188 /* implemented in diag.c */ 189 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 190 /* implemented in interrupt.c */ 191 int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 192 struct kvm_s390_pgm_info *pgm_info); 193 194 /** 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 */ 220 static 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 } 226 227 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, 228 struct kvm_s390_irq *s390irq); 229 230 /* implemented in interrupt.c */ 231 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 232 int psw_extint_disabled(struct kvm_vcpu *vcpu); 233 void kvm_s390_destroy_adapters(struct kvm *kvm); 234 int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu); 235 extern struct kvm_device_ops kvm_flic_ops; 236 237 /* implemented in guestdbg.c */ 238 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 239 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 240 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 241 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 242 struct kvm_guest_debug *dbg); 243 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 244 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 245 void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 246 247 #endif 248