/* $NetBSD: pvh_consinit.c,v 1.2.20.2 2023/10/18 16:53:03 martin Exp $ */ /* * Copyright (c) 2020 Manuel Bouyer. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include __KERNEL_RCSID(0, "$NetBSD: pvh_consinit.c,v 1.2.20.2 2023/10/18 16:53:03 martin Exp $"); #include "xencons.h" #include #include #include #include #include #include #include #include #include #include int xen_pvh_consinit(void) { /* * hugly hack because we're called multiple times at different * boot stage. */ static int initted = 0; if (initted == 0) { /* fall back to printk() until we can setup our console */ xen_early_console(); } if (xendomain_is_dom0()) { union xen_cmdline_parseinfo xcp; xen_parse_cmdline(XEN_PARSE_CONSOLE, &xcp); #ifdef CONS_OVERRIDE if (strcmp(default_consinfo.devname, "tty0") == 0 || strcmp(default_consinfo.devname, "pc") == 0) { #else if (strcmp(xcp.xcp_console, "tty0") == 0 || /* linux name */ strcmp(xcp.xcp_console, "pc") == 0) { /* NetBSD name */ #endif /* CONS_OVERRIDE */ initted++; return 0; /* native console code will do it */ } } if (initted == 0 && !xendomain_is_dom0()) { /* pmap not up yet */ initted++; return 1; } else if (initted > 1) { return 1; } initted++; if (xendomain_is_dom0()) { /* we know we're using Xen's console at this point */ xenconscn_attach(); /* no ring in this case */ initted++; /* don't init console twice */ return 1; } #if NXENCONS > 0 /* we can now map the xencons rings. */ struct xen_hvm_param xen_hvm_param; xen_hvm_param.domid = DOMID_SELF; xen_hvm_param.index = HVM_PARAM_CONSOLE_PFN; if ( HYPERVISOR_hvm_op(HVMOP_get_param, &xen_hvm_param) < 0) panic("xen_pvh_consinit: can't get console PFN"); xen_start_info.console.domU.mfn = xen_hvm_param.value; pmap_kenter_pa((vaddr_t) xencons_interface, ptoa(xen_hvm_param.value), VM_PROT_READ|VM_PROT_WRITE, 0); xen_hvm_param.domid = DOMID_SELF; xen_hvm_param.index = HVM_PARAM_CONSOLE_EVTCHN; if ( HYPERVISOR_hvm_op(HVMOP_get_param, &xen_hvm_param) < 0) panic("xen_pvh_consinit: can't get console event"); xen_start_info.console.domU.evtchn = xen_hvm_param.value; xenconscn_attach(); #endif return 1; }