LXR linux/include/xen/platform

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _XEN_PLATFORM_PCI_H
   3#define _XEN_PLATFORM_PCI_H
   4
   5#define XEN_IOPORT_MAGIC_VAL 0x49d2
   6#define XEN_IOPORT_LINUX_PRODNUM 0x0003
   7#define XEN_IOPORT_LINUX_DRVVER  0x0001
   8
   9#define XEN_IOPORT_BASE 0x10
  10
  11#define XEN_IOPORT_PLATFLAGS    (XEN_IOPORT_BASE + 0) /* 1 byte access (R/W) */
  12#define XEN_IOPORT_MAGIC        (XEN_IOPORT_BASE + 0) /* 2 byte access (R) */
  13#define XEN_IOPORT_UNPLUG       (XEN_IOPORT_BASE + 0) /* 2 byte access (W) */
  14#define XEN_IOPORT_DRVVER       (XEN_IOPORT_BASE + 0) /* 4 byte access (W) */
  15
  16#define XEN_IOPORT_SYSLOG       (XEN_IOPORT_BASE + 2) /* 1 byte access (W) */
  17#define XEN_IOPORT_PROTOVER     (XEN_IOPORT_BASE + 2) /* 1 byte access (R) */
  18#define XEN_IOPORT_PRODNUM      (XEN_IOPORT_BASE + 2) /* 2 byte access (W) */
  19
  20#define XEN_UNPLUG_ALL_IDE_DISKS        (1<<0)
  21#define XEN_UNPLUG_ALL_NICS             (1<<1)
  22#define XEN_UNPLUG_AUX_IDE_DISKS        (1<<2)
  23#define XEN_UNPLUG_ALL                  (XEN_UNPLUG_ALL_IDE_DISKS|\
  24                                         XEN_UNPLUG_ALL_NICS|\
  25                                         XEN_UNPLUG_AUX_IDE_DISKS)
  26
  27#define XEN_UNPLUG_UNNECESSARY          (1<<16)
  28#define XEN_UNPLUG_NEVER                        (1<<17)
  29
  30static inline int xen_must_unplug_nics(void) {
  31#if (defined(CONFIG_XEN_NETDEV_FRONTEND) || \
  32                defined(CONFIG_XEN_NETDEV_FRONTEND_MODULE)) && \
  33                defined(CONFIG_XEN_PVHVM)
  34        return 1;
  35#else
  36        return 0;
  37#endif
  38}
  39
  40static inline int xen_must_unplug_disks(void) {
  41#if (defined(CONFIG_XEN_BLKDEV_FRONTEND) || \
  42                defined(CONFIG_XEN_BLKDEV_FRONTEND_MODULE)) && \
  43                defined(CONFIG_XEN_PVHVM)
  44        return 1;
  45#else
  46        return 0;
  47#endif
  48}
  49
  50#if defined(CONFIG_XEN_PVHVM)
  51extern bool xen_has_pv_devices(void);
  52extern bool xen_has_pv_disk_devices(void);
  53extern bool xen_has_pv_nic_devices(void);
  54extern bool xen_has_pv_and_legacy_disk_devices(void);
  55#else
  56static inline bool xen_has_pv_devices(void)
  57{
  58        return IS_ENABLED(CONFIG_XEN);
  59}
  60static inline bool xen_has_pv_disk_devices(void)
  61{
  62        return IS_ENABLED(CONFIG_XEN);
  63}
  64static inline bool xen_has_pv_nic_devices(void)
  65{
  66        return IS_ENABLED(CONFIG_XEN);
  67}
  68static inline bool xen_has_pv_and_legacy_disk_devices(void)
  69{
  70        return false;
  71}
  72#endif
  73#endif /* _XEN_PLATFORM_PCI_H */
  74