arch/s390/kvm/kvm-s390.h

   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 /* The current code can have up to 256 pages for virtio */
  23 #define VIRTIODESCSPACE (256ul * 4096ul)
  24
  25 typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
  26
  27 /* declare vfacilities extern */
  28 extern unsigned long *vfacilities;
  29
  30 /* negativ values are error codes, positive values for internal conditions */
  31 #define SIE_INTERCEPT_UCONTROL          (1<<0)
  32 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
  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 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
 132                                     struct kvm_s390_interrupt *s390int);
 133 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
 134                                       struct kvm_s390_interrupt *s390int);
 135 int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
 136 int __must_check kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action);
 137 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
 138                                                     u64 cr6, u64 schid);
 139
 140 /* implemented in priv.c */
 141 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
 142 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
 143 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
 144 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
 145 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
 146 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
 147 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
 148
 149 /* implemented in sigp.c */
 150 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
 151
 152 /* implemented in kvm-s390.c */
 153 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu,
 154                                  unsigned long addr);
 155 void s390_vcpu_block(struct kvm_vcpu *vcpu);
 156 void s390_vcpu_unblock(struct kvm_vcpu *vcpu);
 157 void exit_sie(struct kvm_vcpu *vcpu);
 158 void exit_sie_sync(struct kvm_vcpu *vcpu);
 159 /* implemented in diag.c */
 160 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
 161
 162 #endif