LXR qemu/include/hw/xen/xen

   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
  32typedef xc_interface xenforeignmemory_handle;
  33typedef xc_evtchn xenevtchn_handle;
  34typedef 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
  55static 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
  76void destroy_hvm_domain(bool reboot);
  77
  78/* shutdown/destroy current domain because of an error */
  79void xen_shutdown_fatal_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
  80
  81#ifdef HVM_PARAM_VMPORT_REGS_PFN
  82static 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
  94static 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
 119typedef uint16_t ioservid_t;
 120
 121static inline void xen_map_memory_section(xc_interface *xc, domid_t dom,
 122                                          ioservid_t ioservid,
 123                                          MemoryRegionSection *section)
 124{
 125}
 126
 127static inline void xen_unmap_memory_section(xc_interface *xc, domid_t dom,
 128                                            ioservid_t ioservid,
 129                                            MemoryRegionSection *section)
 130{
 131}
 132
 133static inline void xen_map_io_section(xc_interface *xc, domid_t dom,
 134                                      ioservid_t ioservid,
 135                                      MemoryRegionSection *section)
 136{
 137}
 138
 139static inline void xen_unmap_io_section(xc_interface *xc, domid_t dom,
 140                                        ioservid_t ioservid,
 141                                        MemoryRegionSection *section)
 142{
 143}
 144
 145static inline void xen_map_pcidev(xc_interface *xc, domid_t dom,
 146                                  ioservid_t ioservid,
 147                                  PCIDevice *pci_dev)
 148{
 149}
 150
 151static inline void xen_unmap_pcidev(xc_interface *xc, domid_t dom,
 152                                    ioservid_t ioservid,
 153                                    PCIDevice *pci_dev)
 154{
 155}
 156
 157static inline int xen_create_ioreq_server(xc_interface *xc, domid_t dom,
 158                                          ioservid_t *ioservid)
 159{
 160    return 0;
 161}
 162
 163static inline void xen_destroy_ioreq_server(xc_interface *xc, domid_t dom,
 164                                            ioservid_t ioservid)
 165{
 166}
 167
 168static 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
 205static 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
 215static 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
 228static 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
 241static 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
 254static 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
 267static 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
 279static 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
 291static 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
 304static 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
 311static 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
 322static 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
 333static 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
 341static 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
 356static 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
 363static 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 */
 373