From c1c5413ad58cb73267d328e6020268aa2e50d8ca Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Fri, 14 May 2010 12:44:30 +0100 Subject: x86: Unplug emulated disks and nics. 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 Signed-off-by: Jeremy Fitzhardinge --- include/xen/platform_pci.h | 49 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 include/xen/platform_pci.h (limited to 'include/xen') diff --git a/include/xen/platform_pci.h b/include/xen/platform_pci.h new file mode 100644 index 0000000..ce9d671 --- /dev/null +++ b/include/xen/platform_pci.h @@ -0,0 +1,49 @@ +#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 +#define XEN_UNPLUG_ALL_NICS 2 +#define XEN_UNPLUG_AUX_IDE_DISKS 4 +#define XEN_UNPLUG_ALL 7 +#define XEN_UNPLUG_IGNORE 8 + +static inline int xen_must_unplug_nics(void) { +#if (defined(CONFIG_XEN_NETDEV_FRONTEND) || \ + defined(CONFIG_XEN_NETDEV_FRONTEND_MODULE)) && \ + (defined(CONFIG_XEN_PLATFORM_PCI) || \ + defined(CONFIG_XEN_PLATFORM_PCI_MODULE)) + 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_PLATFORM_PCI) || \ + defined(CONFIG_XEN_PLATFORM_PCI_MODULE)) + return 1; +#else + return 0; +#endif +} + +extern int xen_platform_pci_unplug; + +#endif /* _XEN_PLATFORM_PCI_H */ -- cgit v1.1