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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/include/xen/platform_pci.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#ifndef _XEN_PLATFORM_PCI_H

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#define _XEN_PLATFORM_PCI_H

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#define XEN_IOPORT_MAGIC_VAL 0x49d2

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#define XEN_IOPORT_LINUX_PRODNUM 0x0003

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#define XEN_IOPORT_LINUX_DRVVER  0x0001

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#define XEN_IOPORT_BASE 0x10

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#define XEN_IOPORT_PLATFLAGS	(XEN_IOPORT_BASE + 0) /* 1 byte access (R/W) */

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#define XEN_IOPORT_MAGIC	(XEN_IOPORT_BASE + 0) /* 2 byte access (R) */

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#define XEN_IOPORT_UNPLUG	(XEN_IOPORT_BASE + 0) /* 2 byte access (W) */

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#define XEN_IOPORT_DRVVER	(XEN_IOPORT_BASE + 0) /* 4 byte access (W) */

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

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

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#define XEN_IOPORT_PRODNUM	(XEN_IOPORT_BASE + 2) /* 2 byte access (W) */

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#define XEN_UNPLUG_ALL_IDE_DISKS	(1<<0)

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#define XEN_UNPLUG_ALL_NICS		(1<<1)

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#define XEN_UNPLUG_AUX_IDE_DISKS	(1<<2)

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#define XEN_UNPLUG_ALL			(XEN_UNPLUG_ALL_IDE_DISKS|\

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					 XEN_UNPLUG_ALL_NICS|\

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					 XEN_UNPLUG_AUX_IDE_DISKS)

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#define XEN_UNPLUG_UNNECESSARY 		(1<<16)

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#define XEN_UNPLUG_NEVER	 		(1<<17)

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static inline int xen_must_unplug_nics(void) {

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#if (defined(CONFIG_XEN_NETDEV_FRONTEND) || \

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		defined(CONFIG_XEN_NETDEV_FRONTEND_MODULE)) && \

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		defined(CONFIG_XEN_PVHVM)

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        return 1;

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#else

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        return 0;

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#endif

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}

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static inline int xen_must_unplug_disks(void) {

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#if (defined(CONFIG_XEN_BLKDEV_FRONTEND) || \

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		defined(CONFIG_XEN_BLKDEV_FRONTEND_MODULE)) && \

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		defined(CONFIG_XEN_PVHVM)

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        return 1;

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#else

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        return 0;

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#endif

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}

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#if defined(CONFIG_XEN_PVHVM)

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extern bool xen_has_pv_devices(void);

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extern bool xen_has_pv_disk_devices(void);

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extern bool xen_has_pv_nic_devices(void);

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extern bool xen_has_pv_and_legacy_disk_devices(void);

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#else

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static inline bool xen_has_pv_devices(void)

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{

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	return IS_ENABLED(CONFIG_XEN);

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}

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static inline bool xen_has_pv_disk_devices(void)

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{

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	return IS_ENABLED(CONFIG_XEN);

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}

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static inline bool xen_has_pv_nic_devices(void)

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{

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	return IS_ENABLED(CONFIG_XEN);

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}

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static inline bool xen_has_pv_and_legacy_disk_devices(void)

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{

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	return false;

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}

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#endif

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#endif /* _XEN_PLATFORM_PCI_H */

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