include/hw/xen/xen_common.h

   1 #ifndef QEMU_HW_XEN_COMMON_H
   2 #define QEMU_HW_XEN_COMMON_H 1
   3
   4 #include "config-host.h"
   5
   6 #include <stddef.h>
   7 #include <inttypes.h>
   8
   9 #include <xenctrl.h>
  10 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 420
  11 #  include <xs.h>
  12 #else
  13 #  include <xenstore.h>
  14 #endif
  15 #include <xen/io/xenbus.h>
  16
  17 #include "hw/hw.h"
  18 #include "hw/xen/xen.h"
  19 #include "qemu/queue.h"
  20
  21 /*
  22  * We don't support Xen prior to 3.3.0.
  23  */
  24
  25 /* Xen before 4.0 */
  26 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 400
  27 static inline void *xc_map_foreign_bulk(int xc_handle, uint32_t dom, int prot,
  28                                         xen_pfn_t *arr, int *err,
  29                                         unsigned int num)
  30 {
  31     return xc_map_foreign_batch(xc_handle, dom, prot, arr, num);
  32 }
  33 #endif
  34
  35
  36 /* Xen before 4.1 */
  37 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 410
  38
  39 typedef int XenXC;
  40 typedef int XenEvtchn;
  41 typedef int XenGnttab;
  42
  43 #  define XC_INTERFACE_FMT "%i"
  44 #  define XC_HANDLER_INITIAL_VALUE    -1
  45
  46 static inline XenEvtchn xen_xc_evtchn_open(void *logger,
  47                                            unsigned int open_flags)
  48 {
  49     return xc_evtchn_open();
  50 }
  51
  52 static inline XenGnttab xen_xc_gnttab_open(void *logger,
  53                                            unsigned int open_flags)
  54 {
  55     return xc_gnttab_open();
  56 }
  57
  58 static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,
  59                                           unsigned int open_flags)
  60 {
  61     return xc_interface_open();
  62 }
  63
  64 static inline int xc_fd(int xen_xc)
  65 {
  66     return xen_xc;
  67 }
  68
  69
  70 static inline int xc_domain_populate_physmap_exact
  71     (XenXC xc_handle, uint32_t domid, unsigned long nr_extents,
  72      unsigned int extent_order, unsigned int mem_flags, xen_pfn_t *extent_start)
  73 {
  74     return xc_domain_memory_populate_physmap
  75         (xc_handle, domid, nr_extents, extent_order, mem_flags, extent_start);
  76 }
  77
  78 static inline int xc_domain_add_to_physmap(int xc_handle, uint32_t domid,
  79                                            unsigned int space, unsigned long idx,
  80                                            xen_pfn_t gpfn)
  81 {
  82     struct xen_add_to_physmap xatp = {
  83         .domid = domid,
  84         .space = space,
  85         .idx = idx,
  86         .gpfn = gpfn,
  87     };
  88
  89     return xc_memory_op(xc_handle, XENMEM_add_to_physmap, &xatp);
  90 }
  91
  92 static inline struct xs_handle *xs_open(unsigned long flags)
  93 {
  94     return xs_daemon_open();
  95 }
  96
  97 static inline void xs_close(struct xs_handle *xsh)
  98 {
  99     if (xsh != NULL) {
 100         xs_daemon_close(xsh);
 101     }
 102 }
 103
 104
 105 /* Xen 4.1 */
 106 #else
 107
 108 typedef xc_interface *XenXC;
 109 typedef xc_evtchn *XenEvtchn;
 110 typedef xc_gnttab *XenGnttab;
 111
 112 #  define XC_INTERFACE_FMT "%p"
 113 #  define XC_HANDLER_INITIAL_VALUE    NULL
 114
 115 static inline XenEvtchn xen_xc_evtchn_open(void *logger,
 116                                            unsigned int open_flags)
 117 {
 118     return xc_evtchn_open(logger, open_flags);
 119 }
 120
 121 static inline XenGnttab xen_xc_gnttab_open(void *logger,
 122                                            unsigned int open_flags)
 123 {
 124     return xc_gnttab_open(logger, open_flags);
 125 }
 126
 127 static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,
 128                                           unsigned int open_flags)
 129 {
 130     return xc_interface_open(logger, dombuild_logger, open_flags);
 131 }
 132
 133 /* FIXME There is now way to have the xen fd */
 134 static inline int xc_fd(xc_interface *xen_xc)
 135 {
 136     return -1;
 137 }
 138 #endif
 139
 140 /* Xen before 4.2 */
 141 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 420
 142 static inline int xen_xc_hvm_inject_msi(XenXC xen_xc, domid_t dom,
 143         uint64_t addr, uint32_t data)
 144 {
 145     return -ENOSYS;
 146 }
 147 /* The followings are only to compile op_discard related code on older
 148  * Xen releases. */
 149 #define BLKIF_OP_DISCARD 5
 150 struct blkif_request_discard {
 151     uint64_t nr_sectors;
 152     uint64_t sector_number;
 153 };
 154 #else
 155 static inline int xen_xc_hvm_inject_msi(XenXC xen_xc, domid_t dom,
 156         uint64_t addr, uint32_t data)
 157 {
 158     return xc_hvm_inject_msi(xen_xc, dom, addr, data);
 159 }
 160 #endif
 161
 162 void destroy_hvm_domain(bool reboot);
 163
 164 /* shutdown/destroy current domain because of an error */
 165 void xen_shutdown_fatal_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 166
 167 #endif /* QEMU_HW_XEN_COMMON_H */