/****************************************************************************** * arch/ia64/xen/hypervisor.c * * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp> * VA Linux Systems Japan K.K. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <linux/efi.h> #include <asm/xen/hypervisor.h> #include <asm/xen/privop.h> #include "irq_xen.h" struct shared_info *HYPERVISOR_shared_info __read_mostly = (struct shared_info *)XSI_BASE; EXPORT_SYMBOL(HYPERVISOR_shared_info); DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu); struct start_info *xen_start_info; EXPORT_SYMBOL(xen_start_info); EXPORT_SYMBOL(xen_domain_type); EXPORT_SYMBOL(__hypercall); /* Stolen from arch/x86/xen/enlighten.c */ /* * Flag to determine whether vcpu info placement is available on all * VCPUs. We assume it is to start with, and then set it to zero on * the first failure. This is because it can succeed on some VCPUs * and not others, since it can involve hypervisor memory allocation, * or because the guest failed to guarantee all the appropriate * constraints on all VCPUs (ie buffer can't cross a page boundary). * * Note that any particular CPU may be using a placed vcpu structure, * but we can only optimise if the all are. * * 0: not available, 1: available */ static void __init xen_vcpu_setup(int cpu) { /* * WARNING: * before changing MAX_VIRT_CPUS, * check that shared_info fits on a page */ BUILD_BUG_ON(sizeof(struct shared_info) > PAGE_SIZE); per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu]; } void __init xen_setup_vcpu_info_placement(void) { int cpu; for_each_possible_cpu(cpu) xen_vcpu_setup(cpu); } void __cpuinit xen_cpu_init(void) { xen_smp_intr_init(); } /************************************************************************** * opt feature */ void xen_ia64_enable_opt_feature(void) { /* Enable region 7 identity map optimizations in Xen */ struct xen_ia64_opt_feature optf; optf.cmd = XEN_IA64_OPTF_IDENT_MAP_REG7; optf.on = XEN_IA64_OPTF_ON; optf.pgprot = pgprot_val(PAGE_KERNEL); optf.key = 0; /* No key on linux. */ HYPERVISOR_opt_feature(&optf); }