arch/s390/kvm/kvm-s390.h

   1 /*
   2  * kvm_s390.h -  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 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
  30
  31 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
  32 do { \
  33         debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
  34           d_args); \
  35 } while (0)
  36
  37 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
  38 do { \
  39         debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
  40           "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
  41           d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
  42           d_args); \
  43 } while (0)
  44
  45 static inline int __cpu_is_stopped(struct kvm_vcpu *vcpu)
  46 {
  47         return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT;
  48 }
  49
  50 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
  51 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
  52 void kvm_s390_tasklet(unsigned long parm);
  53 void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
  54 int kvm_s390_inject_vm(struct kvm *kvm,
  55                 struct kvm_s390_interrupt *s390int);
  56 int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
  57                 struct kvm_s390_interrupt *s390int);
  58 int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
  59 int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action);
  60
  61 static inline long kvm_s390_vcpu_get_memsize(struct kvm_vcpu *vcpu)
  62 {
  63         return vcpu->arch.sie_block->gmslm
  64                 - vcpu->arch.sie_block->gmsor
  65                 - VIRTIODESCSPACE + 1ul;
  66 }
  67
  68 static inline void kvm_s390_vcpu_set_mem(struct kvm_vcpu *vcpu)
  69 {
  70         struct kvm_memory_slot *mem;
  71
  72         down_read(&vcpu->kvm->slots_lock);
  73         mem = &vcpu->kvm->memslots[0];
  74
  75         vcpu->arch.sie_block->gmsor = mem->userspace_addr;
  76         vcpu->arch.sie_block->gmslm =
  77                 mem->userspace_addr +
  78                 (mem->npages << PAGE_SHIFT) +
  79                 VIRTIODESCSPACE - 1ul;
  80
  81         up_read(&vcpu->kvm->slots_lock);
  82 }
  83
  84 /* implemented in priv.c */
  85 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
  86
  87 /* implemented in sigp.c */
  88 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
  89
  90 /* implemented in kvm-s390.c */
  91 int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu,
  92                                  unsigned long addr);
  93 /* implemented in diag.c */
  94 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
  95
  96 #endif