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 is_vcpu_stopped(struct kvm_vcpu *vcpu) 49 { 50 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED; 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 #define GUEST_PREFIX_SHIFT 13 65 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) 66 { 67 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; 68 } 69 70 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) 71 { 72 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; 73 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 74 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); 75 } 76 77 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu) 78 { 79 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 80 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 81 82 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 83 } 84 85 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, 86 u64 *address1, u64 *address2) 87 { 88 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28; 89 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16; 90 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12; 91 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff; 92 93 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1; 94 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 95 } 96 97 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) 98 { 99 if (r1) 100 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; 101 if (r2) 102 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; 103 } 104 105 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu) 106 { 107 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 108 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 109 ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 110 /* The displacement is a 20bit _SIGNED_ value */ 111 if (disp2 & 0x80000) 112 disp2+=0xfff00000; 113 114 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; 115 } 116 117 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu) 118 { 119 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 120 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 121 122 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 123 } 124 125 /* Set the condition code in the guest program status word */ 126 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) 127 { 128 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44); 129 vcpu->arch.sie_block->gpsw.mask |= cc << 44; 130 } 131 132 /* are cpu states controlled by user space */ 133 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) 134 { 135 return kvm->arch.user_cpu_state_ctrl != 0; 136 } 137 138 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 139 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); 140 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 141 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 142 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 143 void kvm_s390_clear_float_irqs(struct kvm *kvm); 144 int __must_check kvm_s390_inject_vm(struct kvm *kvm, 145 struct kvm_s390_interrupt *s390int); 146 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 147 struct kvm_s390_interrupt *s390int); 148 int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code); 149 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 150 u64 cr6, u64 schid); 151 void kvm_s390_reinject_io_int(struct kvm *kvm, 152 struct kvm_s390_interrupt_info *inti); 153 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 154 155 /* implemented in priv.c */ 156 int is_valid_psw(psw_t *psw); 157 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 158 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); 159 int kvm_s390_handle_01(struct kvm_vcpu *vcpu); 160 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); 161 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); 162 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); 163 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); 164 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); 165 166 /* implemented in sigp.c */ 167 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 168 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); 169 170 /* implemented in kvm-s390.c */ 171 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); 172 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); 173 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 174 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 175 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 176 void s390_vcpu_block(struct kvm_vcpu *vcpu); 177 void s390_vcpu_unblock(struct kvm_vcpu *vcpu); 178 void exit_sie(struct kvm_vcpu *vcpu); 179 void exit_sie_sync(struct kvm_vcpu *vcpu); 180 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 181 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 182 /* is cmma enabled */ 183 bool kvm_s390_cmma_enabled(struct kvm *kvm); 184 int test_vfacility(unsigned long nr); 185 186 /* implemented in diag.c */ 187 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 188 /* implemented in interrupt.c */ 189 int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 190 struct kvm_s390_pgm_info *pgm_info); 191 192 /** 193 * kvm_s390_inject_prog_cond - conditionally inject a program check 194 * @vcpu: virtual cpu 195 * @rc: original return/error code 196 * 197 * This function is supposed to be used after regular guest access functions 198 * failed, to conditionally inject a program check to a vcpu. The typical 199 * pattern would look like 200 * 201 * rc = write_guest(vcpu, addr, data, len); 202 * if (rc) 203 * return kvm_s390_inject_prog_cond(vcpu, rc); 204 * 205 * A negative return code from guest access functions implies an internal error 206 * like e.g. out of memory. In these cases no program check should be injected 207 * to the guest. 208 * A positive value implies that an exception happened while accessing a guest's 209 * memory. In this case all data belonging to the corresponding program check 210 * has been stored in vcpu->arch.pgm and can be injected with 211 * kvm_s390_inject_prog_irq(). 212 * 213 * Returns: - the original @rc value if @rc was negative (internal error) 214 * - zero if @rc was already zero 215 * - zero or error code from injecting if @rc was positive 216 * (program check injected to @vcpu) 217 */ 218 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) 219 { 220 if (rc <= 0) 221 return rc; 222 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 223 } 224 225 /* implemented in interrupt.c */ 226 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 227 int psw_extint_disabled(struct kvm_vcpu *vcpu); 228 void kvm_s390_destroy_adapters(struct kvm *kvm); 229 int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu); 230 extern struct kvm_device_ops kvm_flic_ops; 231 232 /* implemented in guestdbg.c */ 233 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 234 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 235 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 236 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 237 struct kvm_guest_debug *dbg); 238 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 239 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 240 void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 241 242 #endif 243