qemu/include/hw/xen/xen_common.h

   1 #ifndef QEMU_HW_XEN_COMMON_H
   2 #define QEMU_HW_XEN_COMMON_H 1
   3
   4
   5
   6 /*
   7  * If we have new enough libxenctrl then we do not want/need these compat
   8  * interfaces, despite what the user supplied cflags might say. They
   9  * must be undefined before including xenctrl.h
  10  */
  11 #undef XC_WANT_COMPAT_EVTCHN_API
  12 #undef XC_WANT_COMPAT_GNTTAB_API
  13 #undef XC_WANT_COMPAT_MAP_FOREIGN_API
  14
  15 #include <xenctrl.h>
  16 #include <xenstore.h>
  17 #include <xen/io/xenbus.h>
  18
  19 #include "hw/hw.h"
  20 #include "hw/xen/xen.h"
  21 #include "hw/pci/pci.h"
  22 #include "qemu/queue.h"
  23 #include "trace.h"
  24
  25 /*
  26  * We don't support Xen prior to 4.2.0.
  27  */
  28
  29 /* Xen 4.2 thru 4.6 */
  30 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 471
  31
  32 typedef xc_interface xenforeignmemory_handle;
  33 typedef xc_evtchn xenevtchn_handle;
  34 typedef xc_gnttab xengnttab_handle;
  35
  36 #define xenevtchn_open(l, f) xc_evtchn_open(l, f);
  37 #define xenevtchn_close(h) xc_evtchn_close(h)
  38 #define xenevtchn_fd(h) xc_evtchn_fd(h)
  39 #define xenevtchn_pending(h) xc_evtchn_pending(h)
  40 #define xenevtchn_notify(h, p) xc_evtchn_notify(h, p)
  41 #define xenevtchn_bind_interdomain(h, d, p) xc_evtchn_bind_interdomain(h, d, p)
  42 #define xenevtchn_unmask(h, p) xc_evtchn_unmask(h, p)
  43 #define xenevtchn_unbind(h, p) xc_evtchn_unbind(h, p)
  44
  45 #define xengnttab_open(l, f) xc_gnttab_open(l, f)
  46 #define xengnttab_close(h) xc_gnttab_close(h)
  47 #define xengnttab_set_max_grants(h, n) xc_gnttab_set_max_grants(h, n)
  48 #define xengnttab_map_grant_ref(h, d, r, p) xc_gnttab_map_grant_ref(h, d, r, p)
  49 #define xengnttab_unmap(h, a, n) xc_gnttab_munmap(h, a, n)
  50 #define xengnttab_map_grant_refs(h, c, d, r, p) \
  51     xc_gnttab_map_grant_refs(h, c, d, r, p)
  52
  53 #define xenforeignmemory_open(l, f) xen_xc
  54
  55 static inline void *xenforeignmemory_map(xc_interface *h, uint32_t dom,
  56                                          int prot, size_t pages,
  57                                          const xen_pfn_t arr[/*pages*/],
  58                                          int err[/*pages*/])
  59 {
  60     if (err)
  61         return xc_map_foreign_bulk(h, dom, prot, arr, err, pages);
  62     else
  63         return xc_map_foreign_pages(h, dom, prot, arr, pages);
  64 }
  65
  66 #define xenforeignmemory_unmap(h, p, s) munmap(p, s * XC_PAGE_SIZE)
  67
  68 #else /* CONFIG_XEN_CTRL_INTERFACE_VERSION >= 471 */
  69
  70 #include <xenevtchn.h>
  71 #include <xengnttab.h>
  72 #include <xenforeignmemory.h>
  73
  74 #endif
  75
  76 void destroy_hvm_domain(bool reboot);
  77
  78 /* shutdown/destroy current domain because of an error */
  79 void xen_shutdown_fatal_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
  80
  81 #ifdef HVM_PARAM_VMPORT_REGS_PFN
  82 static inline int xen_get_vmport_regs_pfn(xc_interface *xc, domid_t dom,
  83                                           xen_pfn_t *vmport_regs_pfn)
  84 {
  85     int rc;
  86     uint64_t value;
  87     rc = xc_hvm_param_get(xc, dom, HVM_PARAM_VMPORT_REGS_PFN, &value);
  88     if (rc >= 0) {
  89         *vmport_regs_pfn = (xen_pfn_t) value;
  90     }
  91     return rc;
  92 }
  93 #else
  94 static inline int xen_get_vmport_regs_pfn(xc_interface *xc, domid_t dom,
  95                                           xen_pfn_t *vmport_regs_pfn)
  96 {
  97     return -ENOSYS;
  98 }
  99 #endif
 100
 101 /* Xen before 4.6 */
 102 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 460
 103
 104 #ifndef HVM_IOREQSRV_BUFIOREQ_ATOMIC
 105 #define HVM_IOREQSRV_BUFIOREQ_ATOMIC 2
 106 #endif
 107
 108 #endif
 109
 110 /* Xen before 4.5 */
 111 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 450
 112
 113 #ifndef HVM_PARAM_BUFIOREQ_EVTCHN
 114 #define HVM_PARAM_BUFIOREQ_EVTCHN 26
 115 #endif
 116
 117 #define IOREQ_TYPE_PCI_CONFIG 2
 118
 119 typedef uint16_t ioservid_t;
 120
 121 static inline void xen_map_memory_section(xc_interface *xc, domid_t dom,
 122                                           ioservid_t ioservid,
 123                                           MemoryRegionSection *section)
 124 {
 125 }
 126
 127 static inline void xen_unmap_memory_section(xc_interface *xc, domid_t dom,
 128                                             ioservid_t ioservid,
 129                                             MemoryRegionSection *section)
 130 {
 131 }
 132
 133 static inline void xen_map_io_section(xc_interface *xc, domid_t dom,
 134                                       ioservid_t ioservid,
 135                                       MemoryRegionSection *section)
 136 {
 137 }
 138
 139 static inline void xen_unmap_io_section(xc_interface *xc, domid_t dom,
 140                                         ioservid_t ioservid,
 141                                         MemoryRegionSection *section)
 142 {
 143 }
 144
 145 static inline void xen_map_pcidev(xc_interface *xc, domid_t dom,
 146                                   ioservid_t ioservid,
 147                                   PCIDevice *pci_dev)
 148 {
 149 }
 150
 151 static inline void xen_unmap_pcidev(xc_interface *xc, domid_t dom,
 152                                     ioservid_t ioservid,
 153                                     PCIDevice *pci_dev)
 154 {
 155 }
 156
 157 static inline int xen_create_ioreq_server(xc_interface *xc, domid_t dom,
 158                                           ioservid_t *ioservid)
 159 {
 160     return 0;
 161 }
 162
 163 static inline void xen_destroy_ioreq_server(xc_interface *xc, domid_t dom,
 164                                             ioservid_t ioservid)
 165 {
 166 }
 167
 168 static inline int xen_get_ioreq_server_info(xc_interface *xc, domid_t dom,
 169                                             ioservid_t ioservid,
 170                                             xen_pfn_t *ioreq_pfn,
 171                                             xen_pfn_t *bufioreq_pfn,
 172                                             evtchn_port_t *bufioreq_evtchn)
 173 {
 174     unsigned long param;
 175     int rc;
 176
 177     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_IOREQ_PFN, &param);
 178     if (rc < 0) {
 179         fprintf(stderr, "failed to get HVM_PARAM_IOREQ_PFN\n");
 180         return -1;
 181     }
 182
 183     *ioreq_pfn = param;
 184
 185     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_BUFIOREQ_PFN, &param);
 186     if (rc < 0) {
 187         fprintf(stderr, "failed to get HVM_PARAM_BUFIOREQ_PFN\n");
 188         return -1;
 189     }
 190
 191     *bufioreq_pfn = param;
 192
 193     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_BUFIOREQ_EVTCHN,
 194                           &param);
 195     if (rc < 0) {
 196         fprintf(stderr, "failed to get HVM_PARAM_BUFIOREQ_EVTCHN\n");
 197         return -1;
 198     }
 199
 200     *bufioreq_evtchn = param;
 201
 202     return 0;
 203 }
 204
 205 static inline int xen_set_ioreq_server_state(xc_interface *xc, domid_t dom,
 206                                              ioservid_t ioservid,
 207                                              bool enable)
 208 {
 209     return 0;
 210 }
 211
 212 /* Xen 4.5 */
 213 #else
 214
 215 static inline void xen_map_memory_section(xc_interface *xc, domid_t dom,
 216                                           ioservid_t ioservid,
 217                                           MemoryRegionSection *section)
 218 {
 219     hwaddr start_addr = section->offset_within_address_space;
 220     ram_addr_t size = int128_get64(section->size);
 221     hwaddr end_addr = start_addr + size - 1;
 222
 223     trace_xen_map_mmio_range(ioservid, start_addr, end_addr);
 224     xc_hvm_map_io_range_to_ioreq_server(xc, dom, ioservid, 1,
 225                                         start_addr, end_addr);
 226 }
 227
 228 static inline void xen_unmap_memory_section(xc_interface *xc, domid_t dom,
 229                                             ioservid_t ioservid,
 230                                             MemoryRegionSection *section)
 231 {
 232     hwaddr start_addr = section->offset_within_address_space;
 233     ram_addr_t size = int128_get64(section->size);
 234     hwaddr end_addr = start_addr + size - 1;
 235
 236     trace_xen_unmap_mmio_range(ioservid, start_addr, end_addr);
 237     xc_hvm_unmap_io_range_from_ioreq_server(xc, dom, ioservid, 1,
 238                                             start_addr, end_addr);
 239 }
 240
 241 static inline void xen_map_io_section(xc_interface *xc, domid_t dom,
 242                                       ioservid_t ioservid,
 243                                       MemoryRegionSection *section)
 244 {
 245     hwaddr start_addr = section->offset_within_address_space;
 246     ram_addr_t size = int128_get64(section->size);
 247     hwaddr end_addr = start_addr + size - 1;
 248
 249     trace_xen_map_portio_range(ioservid, start_addr, end_addr);
 250     xc_hvm_map_io_range_to_ioreq_server(xc, dom, ioservid, 0,
 251                                         start_addr, end_addr);
 252 }
 253
 254 static inline void xen_unmap_io_section(xc_interface *xc, domid_t dom,
 255                                         ioservid_t ioservid,
 256                                         MemoryRegionSection *section)
 257 {
 258     hwaddr start_addr = section->offset_within_address_space;
 259     ram_addr_t size = int128_get64(section->size);
 260     hwaddr end_addr = start_addr + size - 1;
 261
 262     trace_xen_unmap_portio_range(ioservid, start_addr, end_addr);
 263     xc_hvm_unmap_io_range_from_ioreq_server(xc, dom, ioservid, 0,
 264                                             start_addr, end_addr);
 265 }
 266
 267 static inline void xen_map_pcidev(xc_interface *xc, domid_t dom,
 268                                   ioservid_t ioservid,
 269                                   PCIDevice *pci_dev)
 270 {
 271     trace_xen_map_pcidev(ioservid, pci_bus_num(pci_dev->bus),
 272                          PCI_SLOT(pci_dev->devfn), PCI_FUNC(pci_dev->devfn));
 273     xc_hvm_map_pcidev_to_ioreq_server(xc, dom, ioservid,
 274                                       0, pci_bus_num(pci_dev->bus),
 275                                       PCI_SLOT(pci_dev->devfn),
 276                                       PCI_FUNC(pci_dev->devfn));
 277 }
 278
 279 static inline void xen_unmap_pcidev(xc_interface *xc, domid_t dom,
 280                                     ioservid_t ioservid,
 281                                     PCIDevice *pci_dev)
 282 {
 283     trace_xen_unmap_pcidev(ioservid, pci_bus_num(pci_dev->bus),
 284                            PCI_SLOT(pci_dev->devfn), PCI_FUNC(pci_dev->devfn));
 285     xc_hvm_unmap_pcidev_from_ioreq_server(xc, dom, ioservid,
 286                                           0, pci_bus_num(pci_dev->bus),
 287                                           PCI_SLOT(pci_dev->devfn),
 288                                           PCI_FUNC(pci_dev->devfn));
 289 }
 290
 291 static inline int xen_create_ioreq_server(xc_interface *xc, domid_t dom,
 292                                           ioservid_t *ioservid)
 293 {
 294     int rc = xc_hvm_create_ioreq_server(xc, dom, HVM_IOREQSRV_BUFIOREQ_ATOMIC,
 295                                         ioservid);
 296
 297     if (rc == 0) {
 298         trace_xen_ioreq_server_create(*ioservid);
 299     }
 300
 301     return rc;
 302 }
 303
 304 static inline void xen_destroy_ioreq_server(xc_interface *xc, domid_t dom,
 305                                             ioservid_t ioservid)
 306 {
 307     trace_xen_ioreq_server_destroy(ioservid);
 308     xc_hvm_destroy_ioreq_server(xc, dom, ioservid);
 309 }
 310
 311 static inline int xen_get_ioreq_server_info(xc_interface *xc, domid_t dom,
 312                                             ioservid_t ioservid,
 313                                             xen_pfn_t *ioreq_pfn,
 314                                             xen_pfn_t *bufioreq_pfn,
 315                                             evtchn_port_t *bufioreq_evtchn)
 316 {
 317     return xc_hvm_get_ioreq_server_info(xc, dom, ioservid,
 318                                         ioreq_pfn, bufioreq_pfn,
 319                                         bufioreq_evtchn);
 320 }
 321
 322 static inline int xen_set_ioreq_server_state(xc_interface *xc, domid_t dom,
 323                                              ioservid_t ioservid,
 324                                              bool enable)
 325 {
 326     trace_xen_ioreq_server_state(ioservid, enable);
 327     return xc_hvm_set_ioreq_server_state(xc, dom, ioservid, enable);
 328 }
 329
 330 #endif
 331
 332 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 460
 333 static inline int xen_xc_domain_add_to_physmap(xc_interface *xch, uint32_t domid,
 334                                                unsigned int space,
 335                                                unsigned long idx,
 336                                                xen_pfn_t gpfn)
 337 {
 338     return xc_domain_add_to_physmap(xch, domid, space, idx, gpfn);
 339 }
 340 #else
 341 static inline int xen_xc_domain_add_to_physmap(xc_interface *xch, uint32_t domid,
 342                                                unsigned int space,
 343                                                unsigned long idx,
 344                                                xen_pfn_t gpfn)
 345 {
 346     /* In Xen 4.6 rc is -1 and errno contains the error value. */
 347     int rc = xc_domain_add_to_physmap(xch, domid, space, idx, gpfn);
 348     if (rc == -1)
 349         return errno;
 350     return rc;
 351 }
 352 #endif
 353
 354 #ifdef CONFIG_XEN_PV_DOMAIN_BUILD
 355 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 470
 356 static inline int xen_domain_create(xc_interface *xc, uint32_t ssidref,
 357                                     xen_domain_handle_t handle, uint32_t flags,
 358                                     uint32_t *pdomid)
 359 {
 360     return xc_domain_create(xc, ssidref, handle, flags, pdomid);
 361 }
 362 #else
 363 static inline int xen_domain_create(xc_interface *xc, uint32_t ssidref,
 364                                     xen_domain_handle_t handle, uint32_t flags,
 365                                     uint32_t *pdomid)
 366 {
 367     return xc_domain_create(xc, ssidref, handle, flags, pdomid, NULL);
 368 }
 369 #endif
 370 #endif
 371
 372 #endif /* QEMU_HW_XEN_COMMON_H */