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 23typedef 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...)\ 31do { \ 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...)\ 37do { \ 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 44static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu) 45{ 46 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED; 47} 48 49static 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 61static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) 62{ 63 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; 64} 65 66static 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 73typedef u8 __bitwise ar_t; 74 75static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, ar_t *ar) 76{ 77 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 78 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 79 80 if (ar) 81 *ar = base2; 82 83 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 84} 85 86static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, 87 u64 *address1, u64 *address2, 88 ar_t *ar_b1, ar_t *ar_b2) 89{ 90 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28; 91 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16; 92 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12; 93 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff; 94 95 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1; 96 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 97 98 if (ar_b1) 99 *ar_b1 = base1; 100 if (ar_b2) 101 *ar_b2 = base2; 102} 103 104static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) 105{ 106 if (r1) 107 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; 108 if (r2) 109 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; 110} 111 112static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, ar_t *ar) 113{ 114 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 115 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 116 ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 117 /* The displacement is a 20bit _SIGNED_ value */ 118 if (disp2 & 0x80000) 119 disp2+=0xfff00000; 120 121 if (ar) 122 *ar = base2; 123 124 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; 125} 126 127static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, ar_t *ar) 128{ 129 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 130 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 131 132 if (ar) 133 *ar = base2; 134 135 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 136} 137 138/* Set the condition code in the guest program status word */ 139static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) 140{ 141 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44); 142 vcpu->arch.sie_block->gpsw.mask |= cc << 44; 143} 144 145/* test availability of facility in a kvm instance */ 146static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr) 147{ 148 return __test_facility(nr, kvm->arch.model.fac->mask) && 149 __test_facility(nr, kvm->arch.model.fac->list); 150} 151 152static inline int set_kvm_facility(u64 *fac_list, unsigned long nr) 153{ 154 unsigned char *ptr; 155 156 if (nr >= MAX_FACILITY_BIT) 157 return -EINVAL; 158 ptr = (unsigned char *) fac_list + (nr >> 3); 159 *ptr |= (0x80UL >> (nr & 7)); 160 return 0; 161} 162 163/* are cpu states controlled by user space */ 164static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) 165{ 166 return kvm->arch.user_cpu_state_ctrl != 0; 167} 168 169int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 170void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); 171enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 172int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 173void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 174void kvm_s390_clear_float_irqs(struct kvm *kvm); 175int __must_check kvm_s390_inject_vm(struct kvm *kvm, 176 struct kvm_s390_interrupt *s390int); 177int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 178 struct kvm_s390_irq *irq); 179int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code); 180struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 181 u64 isc_mask, u32 schid); 182int kvm_s390_reinject_io_int(struct kvm *kvm, 183 struct kvm_s390_interrupt_info *inti); 184int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 185 186/* implemented in intercept.c */ 187void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilc); 188int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); 189 190/* implemented in priv.c */ 191int is_valid_psw(psw_t *psw); 192int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 193int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); 194int kvm_s390_handle_01(struct kvm_vcpu *vcpu); 195int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); 196int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); 197int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); 198int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); 199int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); 200 201/* implemented in sigp.c */ 202int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 203int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); 204 205/* implemented in kvm-s390.c */ 206long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); 207int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); 208int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu, 209 unsigned long addr); 210int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 211int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr); 212void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 213void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 214void s390_vcpu_block(struct kvm_vcpu *vcpu); 215void s390_vcpu_unblock(struct kvm_vcpu *vcpu); 216void exit_sie(struct kvm_vcpu *vcpu); 217void exit_sie_sync(struct kvm_vcpu *vcpu); 218int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 219void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 220/* is cmma enabled */ 221bool kvm_s390_cmma_enabled(struct kvm *kvm); 222unsigned long kvm_s390_fac_list_mask_size(void); 223extern unsigned long kvm_s390_fac_list_mask[]; 224 225/* implemented in diag.c */ 226int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 227/* implemented in interrupt.c */ 228int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 229 struct kvm_s390_pgm_info *pgm_info); 230 231/** 232 * kvm_s390_inject_prog_cond - conditionally inject a program check 233 * @vcpu: virtual cpu 234 * @rc: original return/error code 235 * 236 * This function is supposed to be used after regular guest access functions 237 * failed, to conditionally inject a program check to a vcpu. The typical 238 * pattern would look like 239 * 240 * rc = write_guest(vcpu, addr, data, len); 241 * if (rc) 242 * return kvm_s390_inject_prog_cond(vcpu, rc); 243 * 244 * A negative return code from guest access functions implies an internal error 245 * like e.g. out of memory. In these cases no program check should be injected 246 * to the guest. 247 * A positive value implies that an exception happened while accessing a guest's 248 * memory. In this case all data belonging to the corresponding program check 249 * has been stored in vcpu->arch.pgm and can be injected with 250 * kvm_s390_inject_prog_irq(). 251 * 252 * Returns: - the original @rc value if @rc was negative (internal error) 253 * - zero if @rc was already zero 254 * - zero or error code from injecting if @rc was positive 255 * (program check injected to @vcpu) 256 */ 257static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) 258{ 259 if (rc <= 0) 260 return rc; 261 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 262} 263 264int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, 265 struct kvm_s390_irq *s390irq); 266 267/* implemented in interrupt.c */ 268int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop); 269int psw_extint_disabled(struct kvm_vcpu *vcpu); 270void kvm_s390_destroy_adapters(struct kvm *kvm); 271int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu); 272extern struct kvm_device_ops kvm_flic_ops; 273int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu); 274void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu); 275int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, 276 void __user *buf, int len); 277int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, 278 __u8 __user *buf, int len); 279 280/* implemented in guestdbg.c */ 281void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 282void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 283void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 284int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 285 struct kvm_guest_debug *dbg); 286void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 287void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 288void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 289 290#endif 291