linux/arch/s390/kvm/kvm-s390.h
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   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
  25typedef 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)
  29int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
  30
  31#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
  32do { \
  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...)\
  38do { \
  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
  45static inline int __cpu_is_stopped(struct kvm_vcpu *vcpu)
  46{
  47        return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT;
  48}
  49
  50int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
  51enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
  52void kvm_s390_tasklet(unsigned long parm);
  53void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
  54int kvm_s390_inject_vm(struct kvm *kvm,
  55                struct kvm_s390_interrupt *s390int);
  56int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
  57                struct kvm_s390_interrupt *s390int);
  58int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
  59int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action);
  60
  61static 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
  68static inline void kvm_s390_vcpu_set_mem(struct kvm_vcpu *vcpu)
  69{
  70        int idx;
  71        struct kvm_memory_slot *mem;
  72        struct kvm_memslots *memslots;
  73
  74        idx = srcu_read_lock(&vcpu->kvm->srcu);
  75        memslots = kvm_memslots(vcpu->kvm);
  76
  77        mem = &memslots->memslots[0];
  78
  79        vcpu->arch.sie_block->gmsor = mem->userspace_addr;
  80        vcpu->arch.sie_block->gmslm =
  81                mem->userspace_addr +
  82                (mem->npages << PAGE_SHIFT) +
  83                VIRTIODESCSPACE - 1ul;
  84
  85        srcu_read_unlock(&vcpu->kvm->srcu, idx);
  86}
  87
  88/* implemented in priv.c */
  89int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
  90
  91/* implemented in sigp.c */
  92int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
  93
  94/* implemented in kvm-s390.c */
  95int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu,
  96                                 unsigned long addr);
  97/* implemented in diag.c */
  98int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
  99
 100#endif
 101