LXR linux/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
  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)
  29#define SIE_INTERCEPT_UCONTROL          (1<<1)
  30int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
  31
  32#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
  33do { \
  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...)\
  39do { \
  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
  46static inline int __cpu_is_stopped(struct kvm_vcpu *vcpu)
  47{
  48        return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT;
  49}
  50
  51static 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
  62static 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
  68static 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
  76static 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
  88static 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
 100static 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
 108int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
 109enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
 110void kvm_s390_tasklet(unsigned long parm);
 111void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
 112void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu);
 113int kvm_s390_inject_vm(struct kvm *kvm,
 114                struct kvm_s390_interrupt *s390int);
 115int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
 116                struct kvm_s390_interrupt *s390int);
 117int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
 118int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action);
 119struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
 120                                                    u64 cr6, u64 schid);
 121
 122/* implemented in priv.c */
 123int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
 124int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
 125int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
 126int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
 127int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
 128int kvm_s390_handle_priv_eb(struct kvm_vcpu *vcpu);
 129
 130/* implemented in sigp.c */
 131int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
 132
 133/* implemented in kvm-s390.c */
 134int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu,
 135                                 unsigned long addr);
 136/* implemented in diag.c */
 137int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
 138
 139#endif
 140