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re #13140 rb4270 hvm_sd module missing dependencies on scsi and cmlb
re #13166 rb4270 Check for Xen HVM even if CPUID signature returns Microsoft Hv
re #13187 rb4270 Fix Xen HVM related warnings


 722         if (cmd != DDI_ATTACH)
 723                 return (DDI_FAILURE);
 724 
 725         if (ddi_create_minor_node(dip, ddi_get_name(dip), S_IFCHR,
 726             ddi_get_instance(dip), DDI_PSEUDO, 0) != DDI_SUCCESS)
 727                 return (DDI_FAILURE);
 728 
 729         xpv_dip = dip;
 730 
 731         if (xpv_drv_init() != 0)
 732                 return (DDI_FAILURE);
 733 
 734         ddi_report_dev(dip);
 735 
 736         /*
 737          * If the memscrubber attempts to scrub the pages we hand to Xen,
 738          * the domain will panic.
 739          */
 740         memscrub_disable();
 741 
 742         /*
 743          * Report our version to dom0.
 744          */
 745         if (xenbus_printf(XBT_NULL, "guest/xpv", "version", "%d",
 746             HVMPV_XPV_VERS))
 747                 cmn_err(CE_WARN, "xpv: couldn't write version\n");
 748 
 749         return (DDI_SUCCESS);
 750 }
 751 
 752 /*
 753  * Attempts to reload the PV driver plumbing hang on Intel platforms, so
 754  * we don't want to unload the framework by accident.
 755  */
 756 int xpv_allow_detach = 0;
 757 
 758 static int
 759 xpv_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
 760 {
 761         if (cmd != DDI_DETACH || xpv_allow_detach == 0)
 762                 return (DDI_FAILURE);
 763 
 764         if (xpv_dip != NULL) {
 765                 xen_pv_fini();
 766                 ddi_remove_minor_node(dip, NULL);
 767                 xpv_dip = NULL;




 722         if (cmd != DDI_ATTACH)
 723                 return (DDI_FAILURE);
 724 
 725         if (ddi_create_minor_node(dip, ddi_get_name(dip), S_IFCHR,
 726             ddi_get_instance(dip), DDI_PSEUDO, 0) != DDI_SUCCESS)
 727                 return (DDI_FAILURE);
 728 
 729         xpv_dip = dip;
 730 
 731         if (xpv_drv_init() != 0)
 732                 return (DDI_FAILURE);
 733 
 734         ddi_report_dev(dip);
 735 
 736         /*
 737          * If the memscrubber attempts to scrub the pages we hand to Xen,
 738          * the domain will panic.
 739          */
 740         memscrub_disable();
 741 
 742         /* Report our version to dom0 */
 743         (void) xenbus_printf(XBT_NULL, "guest/xpv", "version", "%d",
 744             HVMPV_XPV_VERS);



 745 
 746         return (DDI_SUCCESS);
 747 }
 748 
 749 /*
 750  * Attempts to reload the PV driver plumbing hang on Intel platforms, so
 751  * we don't want to unload the framework by accident.
 752  */
 753 int xpv_allow_detach = 0;
 754 
 755 static int
 756 xpv_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
 757 {
 758         if (cmd != DDI_DETACH || xpv_allow_detach == 0)
 759                 return (DDI_FAILURE);
 760 
 761         if (xpv_dip != NULL) {
 762                 xen_pv_fini();
 763                 ddi_remove_minor_node(dip, NULL);
 764                 xpv_dip = NULL;