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 /* declare vfacilities extern */
  28 extern unsigned long *vfacilities;
  29
  30 /* negativ values are error codes, positive values for internal conditions */
  31 #define SIE_INTERCEPT_RERUNVCPU         (1<<0)
  32 #define SIE_INTERCEPT_UCONTROL          (1<<1)
  33 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
  34
  35 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
  36 do { \
  37         debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
  38           d_args); \
  39 } while (0)
  40
  41 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
  42 do { \
  43         debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
  44           "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
  45           d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
  46           d_args); \
  47 } while (0)
  48
  49 static inline int __cpu_is_stopped(struct kvm_vcpu *vcpu)
  50 {
  51         return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT;
  52 }
  53
  54 static inline int kvm_is_ucontrol(struct kvm *kvm)
  55 {
  56 #ifdef CONFIG_KVM_S390_UCONTROL
  57         if (kvm->arch.gmap)
  58                 return 0;
  59         return 1;
  60 #else
  61         return 0;
  62 #endif
  63 }
  64
  65 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
  66 {
  67         vcpu->arch.sie_block->prefix = prefix & 0x7fffe000u;
  68         vcpu->arch.sie_block->ihcpu  = 0xffff;
  69         kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
  70 }
  71
  72 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu)
  73 {
  74         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
  75         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
  76
  77         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
  78 }
  79
  80 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
  81                                               u64 *address1, u64 *address2)
  82 {
  83         u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
  84         u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
  85         u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
  86         u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
  87
  88         *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
  89         *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
  90 }
  91
  92 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
  93 {
  94         *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
  95         *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
  96 }
  97
  98 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu)
  99 {
 100         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
 101         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
 102                         ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
 103         /* The displacement is a 20bit _SIGNED_ value */
 104         if (disp2 & 0x80000)
 105                 disp2+=0xfff00000;
 106
 107         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
 108 }
 109
 110 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu)
 111 {
 112         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
 113         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
 114
 115         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
 116 }
 117
 118 /* Set the condition code in the guest program status word */
 119 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
 120 {
 121         vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
 122         vcpu->arch.sie_block->gpsw.mask |= cc << 44;
 123 }
 124
 125 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
 126 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
 127 void kvm_s390_tasklet(unsigned long parm);
 128 void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
 129 void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu);
 130 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
 131                                     struct kvm_s390_interrupt *s390int);
 132 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
 133                                       struct kvm_s390_interrupt *s390int);
 134 int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
 135 int __must_check kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action);
 136 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
 137                                                     u64 cr6, u64 schid);
 138
 139 /* implemented in priv.c */
 140 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
 141 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
 142 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
 143 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
 144 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
 145 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
 146 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
 147
 148 /* implemented in sigp.c */
 149 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
 150
 151 /* implemented in kvm-s390.c */
 152 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu,
 153                                  unsigned long addr);
 154 void s390_vcpu_block(struct kvm_vcpu *vcpu);
 155 void s390_vcpu_unblock(struct kvm_vcpu *vcpu);
 156 void exit_sie(struct kvm_vcpu *vcpu);
 157 void exit_sie_sync(struct kvm_vcpu *vcpu);
 158 /* implemented in diag.c */
 159 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
 160
 161 #endif