include/xen/platform_pci.h

   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
  30 static 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
  40 static 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)
  51 extern bool xen_has_pv_devices(void);
  52 extern bool xen_has_pv_disk_devices(void);
  53 extern bool xen_has_pv_nic_devices(void);
  54 extern bool xen_has_pv_and_legacy_disk_devices(void);
  55 #else
  56 static inline bool xen_has_pv_devices(void)
  57 {
  58         return IS_ENABLED(CONFIG_XEN);
  59 }
  60 static inline bool xen_has_pv_disk_devices(void)
  61 {
  62         return IS_ENABLED(CONFIG_XEN);
  63 }
  64 static inline bool xen_has_pv_nic_devices(void)
  65 {
  66         return IS_ENABLED(CONFIG_XEN);
  67 }
  68 static inline bool xen_has_pv_and_legacy_disk_devices(void)
  69 {
  70         return false;
  71 }
  72 #endif
  73 #endif /* _XEN_PLATFORM_PCI_H */