include/hw/s390x/pv.h

   1 /*
   2  * Protected Virtualization header
   3  *
   4  * Copyright IBM Corp. 2020
   5  * Author(s):
   6  *  Janosch Frank <frankja@linux.ibm.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   9  * your option) any later version. See the COPYING file in the top-level
  10  * directory.
  11  */
  12 #ifndef HW_S390_PV_H
  13 #define HW_S390_PV_H
  14
  15 #include "qapi/error.h"
  16 #include "sysemu/kvm.h"
  17
  18 #ifdef CONFIG_KVM
  19 #include "cpu.h"
  20 #include "hw/s390x/s390-virtio-ccw.h"
  21
  22 static inline bool s390_is_pv(void)
  23 {
  24     static S390CcwMachineState *ccw;
  25     Object *obj;
  26
  27     if (ccw) {
  28         return ccw->pv;
  29     }
  30
  31     /* we have to bail out for the "none" machine */
  32     obj = object_dynamic_cast(qdev_get_machine(),
  33                               TYPE_S390_CCW_MACHINE);
  34     if (!obj) {
  35         return false;
  36     }
  37     ccw = S390_CCW_MACHINE(obj);
  38     return ccw->pv;
  39 }
  40
  41 int s390_pv_vm_enable(void);
  42 void s390_pv_vm_disable(void);
  43 int s390_pv_set_sec_parms(uint64_t origin, uint64_t length);
  44 int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak);
  45 void s390_pv_prep_reset(void);
  46 int s390_pv_verify(void);
  47 void s390_pv_unshare(void);
  48 void s390_pv_inject_reset_error(CPUState *cs);
  49 #else /* CONFIG_KVM */
  50 static inline bool s390_is_pv(void) { return false; }
  51 static inline int s390_pv_vm_enable(void) { return 0; }
  52 static inline void s390_pv_vm_disable(void) {}
  53 static inline int s390_pv_set_sec_parms(uint64_t origin, uint64_t length) { return 0; }
  54 static inline int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak) { return 0; }
  55 static inline void s390_pv_prep_reset(void) {}
  56 static inline int s390_pv_verify(void) { return 0; }
  57 static inline void s390_pv_unshare(void) {}
  58 static inline void s390_pv_inject_reset_error(CPUState *cs) {};
  59 #endif /* CONFIG_KVM */
  60
  61 int s390_pv_kvm_init(ConfidentialGuestSupport *cgs, Error **errp);
  62 static inline int s390_pv_init(ConfidentialGuestSupport *cgs, Error **errp)
  63 {
  64     if (!cgs) {
  65         return 0;
  66     }
  67     if (kvm_enabled()) {
  68         return s390_pv_kvm_init(cgs, errp);
  69     }
  70
  71     error_setg(errp, "Protected Virtualization requires KVM");
  72     return -1;
  73 }
  74
  75 #endif /* HW_S390_PV_H */