projects / deliverable / linux.git / blame
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|---|---|---|
| b5a26e4d IY |
1 | /****************************************************************************** |
| 2 | * arch/ia64/xen/hypervisor.c | |
| 3 | * | |
| 4 | * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp> | |
| 5 | * VA Linux Systems Japan K.K. | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License as published by | |
| 9 | * the Free Software Foundation; either version 2 of the License, or | |
| 10 | * (at your option) any later version. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | * GNU General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU General Public License | |
| 18 | * along with this program; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 20 | * | |
| 21 | */ | |
| 22 | ||
| 23 | #include <linux/efi.h> | |
| 24 | #include <asm/xen/hypervisor.h> | |
| 25 | #include <asm/xen/privop.h> | |
| 26 | ||
| 27 | #include "irq_xen.h" | |
| 28 | ||
| 29 | struct shared_info *HYPERVISOR_shared_info __read_mostly = | |
| 30 | (struct shared_info *)XSI_BASE; | |
| 31 | EXPORT_SYMBOL(HYPERVISOR_shared_info); | |
| 32 | ||
| 33 | DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu); | |
| 34 | ||
| 35 | struct start_info *xen_start_info; | |
| 36 | EXPORT_SYMBOL(xen_start_info); | |
| 37 | ||
| 38 | EXPORT_SYMBOL(xen_domain_type); | |
| 39 | ||
| 40 | EXPORT_SYMBOL(__hypercall); | |
| 41 | ||
| 42 | /* Stolen from arch/x86/xen/enlighten.c */ | |
| 43 | /* | |
| 44 | * Flag to determine whether vcpu info placement is available on all | |
| 45 | * VCPUs. We assume it is to start with, and then set it to zero on | |
| 46 | * the first failure. This is because it can succeed on some VCPUs | |
| 47 | * and not others, since it can involve hypervisor memory allocation, | |
| 48 | * or because the guest failed to guarantee all the appropriate | |
| 49 | * constraints on all VCPUs (ie buffer can't cross a page boundary). | |
| 50 | * | |
| 51 | * Note that any particular CPU may be using a placed vcpu structure, | |
| 52 | * but we can only optimise if the all are. | |
| 53 | * | |
| 54 | * 0: not available, 1: available | |
| 55 | */ | |
| 56 | ||
| 57 | static void __init xen_vcpu_setup(int cpu) | |
| 58 | { | |
| 59 | /* | |
| 60 | * WARNING: | |
| 61 | * before changing MAX_VIRT_CPUS, | |
| 62 | * check that shared_info fits on a page | |
| 63 | */ | |
| 64 | BUILD_BUG_ON(sizeof(struct shared_info) > PAGE_SIZE); | |
| 65 | per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu]; | |
| 66 | } | |
| 67 | ||
| 68 | void __init xen_setup_vcpu_info_placement(void) | |
| 69 | { | |
| 70 | int cpu; | |
| 71 | ||
| 72 | for_each_possible_cpu(cpu) | |
| 73 | xen_vcpu_setup(cpu); | |
| 74 | } | |
| 75 | ||
| 76 | void __cpuinit | |
| 77 | xen_cpu_init(void) | |
| 78 | { | |
| 79 | xen_smp_intr_init(); | |
| 80 | } | |
| 81 | ||
| 82 | /************************************************************************** | |
| 83 | * opt feature | |
| 84 | */ | |
| 85 | void | |
| 86 | xen_ia64_enable_opt_feature(void) | |
| 87 | { | |
| 88 | /* Enable region 7 identity map optimizations in Xen */ | |
| 89 | struct xen_ia64_opt_feature optf; | |
| 90 | ||
| 91 | optf.cmd = XEN_IA64_OPTF_IDENT_MAP_REG7; | |
| 92 | optf.on = XEN_IA64_OPTF_ON; | |
| 93 | optf.pgprot = pgprot_val(PAGE_KERNEL); | |
| 94 | optf.key = 0; /* No key on linux. */ | |
| 95 | HYPERVISOR_opt_feature(&optf); | |
| 96 | } |