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 /* negativ values are error codes, positive values for internal conditions */
  28 #define SIE_INTERCEPT_RERUNVCPU         (1<<0)
  29 #define SIE_INTERCEPT_UCONTROL          (1<<1)
  30 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
  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 __cpu_is_stopped(struct kvm_vcpu *vcpu)
  47 {
  48         return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT;
  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 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
  63 {
  64         vcpu->arch.sie_block->prefix = prefix & 0x7fffe000u;
  65         vcpu->arch.sie_block->ihcpu  = 0xffff;
  66 }
  67
  68 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu)
  69 {
  70         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
  71         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
  72
  73         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
  74 }
  75
  76 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
  77                                               u64 *address1, u64 *address2)
  78 {
  79         u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
  80         u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
  81         u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
  82         u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
  83
  84         *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
  85         *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
  86 }
  87
  88 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu)
  89 {
  90         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
  91         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
  92                         ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
  93         /* The displacement is a 20bit _SIGNED_ value */
  94         if (disp2 & 0x80000)
  95                 disp2+=0xfff00000;
  96
  97         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
  98 }
  99
 100 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu)
 101 {
 102         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
 103         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
 104
 105         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
 106 }
 107
 108 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
 109 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
 110 void kvm_s390_tasklet(unsigned long parm);
 111 void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
 112 void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu);
 113 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
 114                                     struct kvm_s390_interrupt *s390int);
 115 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
 116                                       struct kvm_s390_interrupt *s390int);
 117 int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
 118 int __must_check kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action);
 119 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
 120                                                     u64 cr6, u64 schid);
 121
 122 /* implemented in priv.c */
 123 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
 124 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
 125 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
 126 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
 127 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
 128 int kvm_s390_handle_priv_eb(struct kvm_vcpu *vcpu);
 129
 130 /* implemented in sigp.c */
 131 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
 132
 133 /* implemented in kvm-s390.c */
 134 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu,
 135                                  unsigned long addr);
 136 /* implemented in diag.c */
 137 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
 138
 139 #endif