root/include/xen/platform_pci.h

DEFINITIONS

1. xen_must_unplug_nics
2. xen_must_unplug_disks
3. xen_has_pv_devices
4. xen_has_pv_disk_devices
5. xen_has_pv_nic_devices
6. xen_has_pv_and_legacy_disk_devices

#ifndef _XEN_PLATFORM_PCI_H
#define _XEN_PLATFORM_PCI_H

#define XEN_IOPORT_MAGIC_VAL 0x49d2
#define XEN_IOPORT_LINUX_PRODNUM 0x0003
#define XEN_IOPORT_LINUX_DRVVER  0x0001

#define XEN_IOPORT_BASE 0x10

#define XEN_IOPORT_PLATFLAGS    (XEN_IOPORT_BASE + 0) /* 1 byte access (R/W) */
#define XEN_IOPORT_MAGIC        (XEN_IOPORT_BASE + 0) /* 2 byte access (R) */
#define XEN_IOPORT_UNPLUG       (XEN_IOPORT_BASE + 0) /* 2 byte access (W) */
#define XEN_IOPORT_DRVVER       (XEN_IOPORT_BASE + 0) /* 4 byte access (W) */

#define XEN_IOPORT_SYSLOG       (XEN_IOPORT_BASE + 2) /* 1 byte access (W) */
#define XEN_IOPORT_PROTOVER     (XEN_IOPORT_BASE + 2) /* 1 byte access (R) */
#define XEN_IOPORT_PRODNUM      (XEN_IOPORT_BASE + 2) /* 2 byte access (W) */

#define XEN_UNPLUG_ALL_IDE_DISKS        (1<<0)
#define XEN_UNPLUG_ALL_NICS             (1<<1)
#define XEN_UNPLUG_AUX_IDE_DISKS        (1<<2)
#define XEN_UNPLUG_ALL                  (XEN_UNPLUG_ALL_IDE_DISKS|\
                                         XEN_UNPLUG_ALL_NICS|\
                                         XEN_UNPLUG_AUX_IDE_DISKS)

#define XEN_UNPLUG_UNNECESSARY          (1<<16)
#define XEN_UNPLUG_NEVER                        (1<<17)

static inline int xen_must_unplug_nics(void) {
#if (defined(CONFIG_XEN_NETDEV_FRONTEND) || \
                defined(CONFIG_XEN_NETDEV_FRONTEND_MODULE)) && \
                defined(CONFIG_XEN_PVHVM)
        return 1;
#else
        return 0;
#endif
}

static inline int xen_must_unplug_disks(void) {
#if (defined(CONFIG_XEN_BLKDEV_FRONTEND) || \
                defined(CONFIG_XEN_BLKDEV_FRONTEND_MODULE)) && \
                defined(CONFIG_XEN_PVHVM)
        return 1;
#else
        return 0;
#endif
}

#if defined(CONFIG_XEN_PVHVM)
extern bool xen_has_pv_devices(void);
extern bool xen_has_pv_disk_devices(void);
extern bool xen_has_pv_nic_devices(void);
extern bool xen_has_pv_and_legacy_disk_devices(void);
#else
static inline bool xen_has_pv_devices(void)
{
        return IS_ENABLED(CONFIG_XEN);
}
static inline bool xen_has_pv_disk_devices(void)
{
        return IS_ENABLED(CONFIG_XEN);
}
static inline bool xen_has_pv_nic_devices(void)
{
        return IS_ENABLED(CONFIG_XEN);
}
static inline bool xen_has_pv_and_legacy_disk_devices(void)
{
        return false;
}
#endif
#endif /* _XEN_PLATFORM_PCI_H */