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 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); 28 29 /* Transactional Memory Execution related macros */ 30 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10)) 31 #define TDB_FORMAT1 1 32 #define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1)) 33 34 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ 35 do { \ 36 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \ 37 d_args); \ 38 } while (0) 39 40 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\ 41 do { \ 42 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \ 43 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \ 44 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\ 45 d_args); \ 46 } while (0) 47 48 static inline int __cpu_is_stopped(struct kvm_vcpu *vcpu) 49 { 50 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT; 51 } 52 53 static inline int kvm_is_ucontrol(struct kvm *kvm) 54 { 55 #ifdef CONFIG_KVM_S390_UCONTROL 56 if (kvm->arch.gmap) 57 return 0; 58 return 1; 59 #else 60 return 0; 61 #endif 62 } 63 64 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) 65 { 66 vcpu->arch.sie_block->prefix = prefix & 0x7fffe000u; 67 vcpu->arch.sie_block->ihcpu = 0xffff; 68 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); 69 } 70 71 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu) 72 { 73 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 74 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 75 76 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 77 } 78 79 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, 80 u64 *address1, u64 *address2) 81 { 82 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28; 83 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16; 84 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12; 85 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff; 86 87 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1; 88 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 89 } 90 91 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) 92 { 93 if (r1) 94 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; 95 if (r2) 96 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; 97 } 98 99 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu) 100 { 101 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 102 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 103 ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 104 /* The displacement is a 20bit _SIGNED_ value */ 105 if (disp2 & 0x80000) 106 disp2+=0xfff00000; 107 108 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; 109 } 110 111 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu) 112 { 113 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 114 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 115 116 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 117 } 118 119 /* Set the condition code in the guest program status word */ 120 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) 121 { 122 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44); 123 vcpu->arch.sie_block->gpsw.mask |= cc << 44; 124 } 125 126 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 127 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 128 void kvm_s390_tasklet(unsigned long parm); 129 void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 130 void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu); 131 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 132 void kvm_s390_clear_float_irqs(struct kvm *kvm); 133 int __must_check kvm_s390_inject_vm(struct kvm *kvm, 134 struct kvm_s390_interrupt *s390int); 135 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 136 struct kvm_s390_interrupt *s390int); 137 int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code); 138 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 139 u64 cr6, u64 schid); 140 void kvm_s390_reinject_io_int(struct kvm *kvm, 141 struct kvm_s390_interrupt_info *inti); 142 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 143 144 /* implemented in priv.c */ 145 int is_valid_psw(psw_t *psw); 146 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 147 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); 148 int kvm_s390_handle_01(struct kvm_vcpu *vcpu); 149 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); 150 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); 151 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); 152 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); 153 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); 154 155 /* implemented in sigp.c */ 156 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 157 158 /* implemented in kvm-s390.c */ 159 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); 160 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); 161 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 162 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 163 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 164 void s390_vcpu_block(struct kvm_vcpu *vcpu); 165 void s390_vcpu_unblock(struct kvm_vcpu *vcpu); 166 void exit_sie(struct kvm_vcpu *vcpu); 167 void exit_sie_sync(struct kvm_vcpu *vcpu); 168 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 169 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 170 /* is cmma enabled */ 171 bool kvm_s390_cmma_enabled(struct kvm *kvm); 172 int test_vfacility(unsigned long nr); 173 174 /* implemented in diag.c */ 175 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 176 /* implemented in interrupt.c */ 177 int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 178 struct kvm_s390_pgm_info *pgm_info); 179 180 /** 181 * kvm_s390_inject_prog_cond - conditionally inject a program check 182 * @vcpu: virtual cpu 183 * @rc: original return/error code 184 * 185 * This function is supposed to be used after regular guest access functions 186 * failed, to conditionally inject a program check to a vcpu. The typical 187 * pattern would look like 188 * 189 * rc = write_guest(vcpu, addr, data, len); 190 * if (rc) 191 * return kvm_s390_inject_prog_cond(vcpu, rc); 192 * 193 * A negative return code from guest access functions implies an internal error 194 * like e.g. out of memory. In these cases no program check should be injected 195 * to the guest. 196 * A positive value implies that an exception happened while accessing a guest's 197 * memory. In this case all data belonging to the corresponding program check 198 * has been stored in vcpu->arch.pgm and can be injected with 199 * kvm_s390_inject_prog_irq(). 200 * 201 * Returns: - the original @rc value if @rc was negative (internal error) 202 * - zero if @rc was already zero 203 * - zero or error code from injecting if @rc was positive 204 * (program check injected to @vcpu) 205 */ 206 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) 207 { 208 if (rc <= 0) 209 return rc; 210 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 211 } 212 213 /* implemented in interrupt.c */ 214 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 215 int psw_extint_disabled(struct kvm_vcpu *vcpu); 216 void kvm_s390_destroy_adapters(struct kvm *kvm); 217 218 /* implemented in guestdbg.c */ 219 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 220 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 221 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 222 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 223 struct kvm_guest_debug *dbg); 224 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 225 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 226 void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 227 228 #endif 229