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 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
  69 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
  70 void kvm_s390_tasklet(unsigned long parm);
  71 void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
  72 int kvm_s390_inject_vm(struct kvm *kvm,
  73                 struct kvm_s390_interrupt *s390int);
  74 int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
  75                 struct kvm_s390_interrupt *s390int);
  76 int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
  77 int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action);
  78
  79 /* implemented in priv.c */
  80 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
  81 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
  82 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
  83
  84 /* implemented in sigp.c */
  85 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
  86
  87 /* implemented in kvm-s390.c */
  88 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu,
  89                                  unsigned long addr);
  90 /* implemented in diag.c */
  91 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
  92
  93 #endif