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 "hw/pci/pci.h"
  20 #include "qemu/queue.h"
  21 #include "trace.h"
  22
  23 /*
  24  * We don't support Xen prior to 3.3.0.
  25  */
  26
  27 /* Xen before 4.0 */
  28 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 400
  29 static inline void *xc_map_foreign_bulk(int xc_handle, uint32_t dom, int prot,
  30                                         xen_pfn_t *arr, int *err,
  31                                         unsigned int num)
  32 {
  33     return xc_map_foreign_batch(xc_handle, dom, prot, arr, num);
  34 }
  35 #endif
  36
  37
  38 /* Xen before 4.1 */
  39 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 410
  40
  41 typedef int XenXC;
  42 typedef int XenEvtchn;
  43 typedef int XenGnttab;
  44
  45 #  define XC_INTERFACE_FMT "%i"
  46 #  define XC_HANDLER_INITIAL_VALUE    -1
  47
  48 static inline XenEvtchn xen_xc_evtchn_open(void *logger,
  49                                            unsigned int open_flags)
  50 {
  51     return xc_evtchn_open();
  52 }
  53
  54 static inline XenGnttab xen_xc_gnttab_open(void *logger,
  55                                            unsigned int open_flags)
  56 {
  57     return xc_gnttab_open();
  58 }
  59
  60 static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,
  61                                           unsigned int open_flags)
  62 {
  63     return xc_interface_open();
  64 }
  65
  66 static inline int xc_fd(int xen_xc)
  67 {
  68     return xen_xc;
  69 }
  70
  71
  72 static inline int xc_domain_populate_physmap_exact
  73     (XenXC xc_handle, uint32_t domid, unsigned long nr_extents,
  74      unsigned int extent_order, unsigned int mem_flags, xen_pfn_t *extent_start)
  75 {
  76     return xc_domain_memory_populate_physmap
  77         (xc_handle, domid, nr_extents, extent_order, mem_flags, extent_start);
  78 }
  79
  80 static inline int xc_domain_add_to_physmap(int xc_handle, uint32_t domid,
  81                                            unsigned int space, unsigned long idx,
  82                                            xen_pfn_t gpfn)
  83 {
  84     struct xen_add_to_physmap xatp = {
  85         .domid = domid,
  86         .space = space,
  87         .idx = idx,
  88         .gpfn = gpfn,
  89     };
  90
  91     return xc_memory_op(xc_handle, XENMEM_add_to_physmap, &xatp);
  92 }
  93
  94 static inline struct xs_handle *xs_open(unsigned long flags)
  95 {
  96     return xs_daemon_open();
  97 }
  98
  99 static inline void xs_close(struct xs_handle *xsh)
 100 {
 101     if (xsh != NULL) {
 102         xs_daemon_close(xsh);
 103     }
 104 }
 105
 106
 107 /* Xen 4.1 */
 108 #else
 109
 110 typedef xc_interface *XenXC;
 111 typedef xc_evtchn *XenEvtchn;
 112 typedef xc_gnttab *XenGnttab;
 113
 114 #  define XC_INTERFACE_FMT "%p"
 115 #  define XC_HANDLER_INITIAL_VALUE    NULL
 116
 117 static inline XenEvtchn xen_xc_evtchn_open(void *logger,
 118                                            unsigned int open_flags)
 119 {
 120     return xc_evtchn_open(logger, open_flags);
 121 }
 122
 123 static inline XenGnttab xen_xc_gnttab_open(void *logger,
 124                                            unsigned int open_flags)
 125 {
 126     return xc_gnttab_open(logger, open_flags);
 127 }
 128
 129 static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,
 130                                           unsigned int open_flags)
 131 {
 132     return xc_interface_open(logger, dombuild_logger, open_flags);
 133 }
 134
 135 /* FIXME There is now way to have the xen fd */
 136 static inline int xc_fd(xc_interface *xen_xc)
 137 {
 138     return -1;
 139 }
 140 #endif
 141
 142 /* Xen before 4.2 */
 143 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 420
 144 static inline int xen_xc_hvm_inject_msi(XenXC xen_xc, domid_t dom,
 145         uint64_t addr, uint32_t data)
 146 {
 147     return -ENOSYS;
 148 }
 149 /* The followings are only to compile op_discard related code on older
 150  * Xen releases. */
 151 #define BLKIF_OP_DISCARD 5
 152 struct blkif_request_discard {
 153     uint64_t nr_sectors;
 154     uint64_t sector_number;
 155 };
 156 #else
 157 static inline int xen_xc_hvm_inject_msi(XenXC xen_xc, domid_t dom,
 158         uint64_t addr, uint32_t data)
 159 {
 160     return xc_hvm_inject_msi(xen_xc, dom, addr, data);
 161 }
 162 #endif
 163
 164 void destroy_hvm_domain(bool reboot);
 165
 166 /* shutdown/destroy current domain because of an error */
 167 void xen_shutdown_fatal_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 168
 169 #ifdef HVM_PARAM_VMPORT_REGS_PFN
 170 static inline int xen_get_vmport_regs_pfn(XenXC xc, domid_t dom,
 171                                           xen_pfn_t *vmport_regs_pfn)
 172 {
 173     int rc;
 174     uint64_t value;
 175     rc = xc_hvm_param_get(xc, dom, HVM_PARAM_VMPORT_REGS_PFN, &value);
 176     if (rc >= 0) {
 177         *vmport_regs_pfn = (xen_pfn_t) value;
 178     }
 179     return rc;
 180 }
 181 #else
 182 static inline int xen_get_vmport_regs_pfn(XenXC xc, domid_t dom,
 183                                           xen_pfn_t *vmport_regs_pfn)
 184 {
 185     return -ENOSYS;
 186 }
 187 #endif
 188
 189 /* Xen before 4.6 */
 190 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 460
 191
 192 #ifndef HVM_IOREQSRV_BUFIOREQ_ATOMIC
 193 #define HVM_IOREQSRV_BUFIOREQ_ATOMIC 2
 194 #endif
 195
 196 #endif
 197
 198 /* Xen before 4.5 */
 199 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 450
 200
 201 #ifndef HVM_PARAM_BUFIOREQ_EVTCHN
 202 #define HVM_PARAM_BUFIOREQ_EVTCHN 26
 203 #endif
 204
 205 #define IOREQ_TYPE_PCI_CONFIG 2
 206
 207 typedef uint16_t ioservid_t;
 208
 209 static inline void xen_map_memory_section(XenXC xc, domid_t dom,
 210                                           ioservid_t ioservid,
 211                                           MemoryRegionSection *section)
 212 {
 213 }
 214
 215 static inline void xen_unmap_memory_section(XenXC xc, domid_t dom,
 216                                             ioservid_t ioservid,
 217                                             MemoryRegionSection *section)
 218 {
 219 }
 220
 221 static inline void xen_map_io_section(XenXC xc, domid_t dom,
 222                                       ioservid_t ioservid,
 223                                       MemoryRegionSection *section)
 224 {
 225 }
 226
 227 static inline void xen_unmap_io_section(XenXC xc, domid_t dom,
 228                                         ioservid_t ioservid,
 229                                         MemoryRegionSection *section)
 230 {
 231 }
 232
 233 static inline void xen_map_pcidev(XenXC xc, domid_t dom,
 234                                   ioservid_t ioservid,
 235                                   PCIDevice *pci_dev)
 236 {
 237 }
 238
 239 static inline void xen_unmap_pcidev(XenXC xc, domid_t dom,
 240                                     ioservid_t ioservid,
 241                                     PCIDevice *pci_dev)
 242 {
 243 }
 244
 245 static inline int xen_create_ioreq_server(XenXC xc, domid_t dom,
 246                                           ioservid_t *ioservid)
 247 {
 248     return 0;
 249 }
 250
 251 static inline void xen_destroy_ioreq_server(XenXC xc, domid_t dom,
 252                                             ioservid_t ioservid)
 253 {
 254 }
 255
 256 static inline int xen_get_ioreq_server_info(XenXC xc, domid_t dom,
 257                                             ioservid_t ioservid,
 258                                             xen_pfn_t *ioreq_pfn,
 259                                             xen_pfn_t *bufioreq_pfn,
 260                                             evtchn_port_t *bufioreq_evtchn)
 261 {
 262     unsigned long param;
 263     int rc;
 264
 265     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_IOREQ_PFN, &param);
 266     if (rc < 0) {
 267         fprintf(stderr, "failed to get HVM_PARAM_IOREQ_PFN\n");
 268         return -1;
 269     }
 270
 271     *ioreq_pfn = param;
 272
 273     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_BUFIOREQ_PFN, &param);
 274     if (rc < 0) {
 275         fprintf(stderr, "failed to get HVM_PARAM_BUFIOREQ_PFN\n");
 276         return -1;
 277     }
 278
 279     *bufioreq_pfn = param;
 280
 281     rc = xc_get_hvm_param(xc, dom, HVM_PARAM_BUFIOREQ_EVTCHN,
 282                           &param);
 283     if (rc < 0) {
 284         fprintf(stderr, "failed to get HVM_PARAM_BUFIOREQ_EVTCHN\n");
 285         return -1;
 286     }
 287
 288     *bufioreq_evtchn = param;
 289
 290     return 0;
 291 }
 292
 293 static inline int xen_set_ioreq_server_state(XenXC xc, domid_t dom,
 294                                              ioservid_t ioservid,
 295                                              bool enable)
 296 {
 297     return 0;
 298 }
 299
 300 /* Xen 4.5 */
 301 #else
 302
 303 static inline void xen_map_memory_section(XenXC xc, domid_t dom,
 304                                           ioservid_t ioservid,
 305                                           MemoryRegionSection *section)
 306 {
 307     hwaddr start_addr = section->offset_within_address_space;
 308     ram_addr_t size = int128_get64(section->size);
 309     hwaddr end_addr = start_addr + size - 1;
 310
 311     trace_xen_map_mmio_range(ioservid, start_addr, end_addr);
 312     xc_hvm_map_io_range_to_ioreq_server(xc, dom, ioservid, 1,
 313                                         start_addr, end_addr);
 314 }
 315
 316 static inline void xen_unmap_memory_section(XenXC xc, domid_t dom,
 317                                             ioservid_t ioservid,
 318                                             MemoryRegionSection *section)
 319 {
 320     hwaddr start_addr = section->offset_within_address_space;
 321     ram_addr_t size = int128_get64(section->size);
 322     hwaddr end_addr = start_addr + size - 1;
 323
 324     trace_xen_unmap_mmio_range(ioservid, start_addr, end_addr);
 325     xc_hvm_unmap_io_range_from_ioreq_server(xc, dom, ioservid, 1,
 326                                             start_addr, end_addr);
 327 }
 328
 329 static inline void xen_map_io_section(XenXC xc, domid_t dom,
 330                                       ioservid_t ioservid,
 331                                       MemoryRegionSection *section)
 332 {
 333     hwaddr start_addr = section->offset_within_address_space;
 334     ram_addr_t size = int128_get64(section->size);
 335     hwaddr end_addr = start_addr + size - 1;
 336
 337     trace_xen_map_portio_range(ioservid, start_addr, end_addr);
 338     xc_hvm_map_io_range_to_ioreq_server(xc, dom, ioservid, 0,
 339                                         start_addr, end_addr);
 340 }
 341
 342 static inline void xen_unmap_io_section(XenXC xc, domid_t dom,
 343                                         ioservid_t ioservid,
 344                                         MemoryRegionSection *section)
 345 {
 346     hwaddr start_addr = section->offset_within_address_space;
 347     ram_addr_t size = int128_get64(section->size);
 348     hwaddr end_addr = start_addr + size - 1;
 349
 350     trace_xen_unmap_portio_range(ioservid, start_addr, end_addr);
 351     xc_hvm_unmap_io_range_from_ioreq_server(xc, dom, ioservid, 0,
 352                                             start_addr, end_addr);
 353 }
 354
 355 static inline void xen_map_pcidev(XenXC xc, domid_t dom,
 356                                   ioservid_t ioservid,
 357                                   PCIDevice *pci_dev)
 358 {
 359     trace_xen_map_pcidev(ioservid, pci_bus_num(pci_dev->bus),
 360                          PCI_SLOT(pci_dev->devfn), PCI_FUNC(pci_dev->devfn));
 361     xc_hvm_map_pcidev_to_ioreq_server(xc, dom, ioservid,
 362                                       0, pci_bus_num(pci_dev->bus),
 363                                       PCI_SLOT(pci_dev->devfn),
 364                                       PCI_FUNC(pci_dev->devfn));
 365 }
 366
 367 static inline void xen_unmap_pcidev(XenXC xc, domid_t dom,
 368                                     ioservid_t ioservid,
 369                                     PCIDevice *pci_dev)
 370 {
 371     trace_xen_unmap_pcidev(ioservid, pci_bus_num(pci_dev->bus),
 372                            PCI_SLOT(pci_dev->devfn), PCI_FUNC(pci_dev->devfn));
 373     xc_hvm_unmap_pcidev_from_ioreq_server(xc, dom, ioservid,
 374                                           0, pci_bus_num(pci_dev->bus),
 375                                           PCI_SLOT(pci_dev->devfn),
 376                                           PCI_FUNC(pci_dev->devfn));
 377 }
 378
 379 static inline int xen_create_ioreq_server(XenXC xc, domid_t dom,
 380                                           ioservid_t *ioservid)
 381 {
 382     int rc = xc_hvm_create_ioreq_server(xc, dom, HVM_IOREQSRV_BUFIOREQ_ATOMIC,
 383                                         ioservid);
 384
 385     if (rc == 0) {
 386         trace_xen_ioreq_server_create(*ioservid);
 387     }
 388
 389     return rc;
 390 }
 391
 392 static inline void xen_destroy_ioreq_server(XenXC xc, domid_t dom,
 393                                             ioservid_t ioservid)
 394 {
 395     trace_xen_ioreq_server_destroy(ioservid);
 396     xc_hvm_destroy_ioreq_server(xc, dom, ioservid);
 397 }
 398
 399 static inline int xen_get_ioreq_server_info(XenXC xc, domid_t dom,
 400                                             ioservid_t ioservid,
 401                                             xen_pfn_t *ioreq_pfn,
 402                                             xen_pfn_t *bufioreq_pfn,
 403                                             evtchn_port_t *bufioreq_evtchn)
 404 {
 405     return xc_hvm_get_ioreq_server_info(xc, dom, ioservid,
 406                                         ioreq_pfn, bufioreq_pfn,
 407                                         bufioreq_evtchn);
 408 }
 409
 410 static inline int xen_set_ioreq_server_state(XenXC xc, domid_t dom,
 411                                              ioservid_t ioservid,
 412                                              bool enable)
 413 {
 414     trace_xen_ioreq_server_state(ioservid, enable);
 415     return xc_hvm_set_ioreq_server_state(xc, dom, ioservid, enable);
 416 }
 417
 418 #endif
 419
 420 #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 460
 421 static inline int xen_xc_domain_add_to_physmap(XenXC xch, uint32_t domid,
 422                                                unsigned int space,
 423                                                unsigned long idx,
 424                                                xen_pfn_t gpfn)
 425 {
 426     return xc_domain_add_to_physmap(xch, domid, space, idx, gpfn);
 427 }
 428 #else
 429 static inline int xen_xc_domain_add_to_physmap(XenXC xch, uint32_t domid,
 430                                                unsigned int space,
 431                                                unsigned long idx,
 432                                                xen_pfn_t gpfn)
 433 {
 434     /* In Xen 4.6 rc is -1 and errno contains the error value. */
 435     int rc = xc_domain_add_to_physmap(xch, domid, space, idx, gpfn);
 436     if (rc == -1)
 437         return errno;
 438     return rc;
 439 }
 440 #endif
 441
 442 #endif /* QEMU_HW_XEN_COMMON_H */