include/sysemu/kvm_xen.h

   1 /*
   2  * Xen HVM emulation support in KVM
   3  *
   4  * Copyright © 2019 Oracle and/or its affiliates. All rights reserved.
   5  * Copyright © 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   8  * See the COPYING file in the top-level directory.
   9  *
  10  */
  11
  12 #ifndef QEMU_SYSEMU_KVM_XEN_H
  13 #define QEMU_SYSEMU_KVM_XEN_H
  14
  15 /* The KVM API uses these to indicate "no GPA" or "no GFN" */
  16 #define INVALID_GPA UINT64_MAX
  17 #define INVALID_GFN UINT64_MAX
  18
  19 /* QEMU plays the rôle of dom0 for "interdomain" communication. */
  20 #define DOMID_QEMU  0
  21
  22 int kvm_xen_soft_reset(void);
  23 uint32_t kvm_xen_get_caps(void);
  24 void *kvm_xen_get_vcpu_info_hva(uint32_t vcpu_id);
  25 bool kvm_xen_has_vcpu_callback_vector(void);
  26 void kvm_xen_inject_vcpu_callback_vector(uint32_t vcpu_id, int type);
  27 void kvm_xen_set_callback_asserted(void);
  28 int kvm_xen_set_vcpu_virq(uint32_t vcpu_id, uint16_t virq, uint16_t port);
  29 uint16_t kvm_xen_get_gnttab_max_frames(void);
  30 uint16_t kvm_xen_get_evtchn_max_pirq(void);
  31
  32 #define kvm_xen_has_cap(cap) (!!(kvm_xen_get_caps() &           \
  33                                  KVM_XEN_HVM_CONFIG_ ## cap))
  34
  35 #define XEN_SPECIAL_AREA_ADDR 0xfeff8000UL
  36 #define XEN_SPECIAL_AREA_SIZE 0x4000UL
  37
  38 #define XEN_SPECIALPAGE_CONSOLE     0
  39 #define XEN_SPECIALPAGE_XENSTORE    1
  40
  41 #define XEN_SPECIAL_PFN(x) ((XEN_SPECIAL_AREA_ADDR >> TARGET_PAGE_BITS) + \
  42                             XEN_SPECIALPAGE_##x)
  43
  44 #endif /* QEMU_SYSEMU_KVM_XEN_H */