c1c5413ad5
Add a xen_emul_unplug command line option to the kernel to unplug xen emulated disks and nics. Set the default value of xen_emul_unplug depending on whether or not the Xen PV frontends and the Xen platform PCI driver have been compiled for this kernel (modules or built-in are both OK). The user can specify xen_emul_unplug=ignore to enable PV drivers on HVM even if the host platform doesn't support unplug. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
#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
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#define XEN_UNPLUG_ALL_NICS 2
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#define XEN_UNPLUG_AUX_IDE_DISKS 4
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#define XEN_UNPLUG_ALL 7
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#define XEN_UNPLUG_IGNORE 8
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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_PLATFORM_PCI) || \
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defined(CONFIG_XEN_PLATFORM_PCI_MODULE))
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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_PLATFORM_PCI) || \
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defined(CONFIG_XEN_PLATFORM_PCI_MODULE))
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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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extern int xen_platform_pci_unplug;
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#endif /* _XEN_PLATFORM_PCI_H */
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