1/****************************************************************************** 2 * arch/ia64/xen/grant-table.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/module.h> 24#include <linux/vmalloc.h> 25#include <linux/slab.h> 26#include <linux/mm.h> 27 28#include <xen/interface/xen.h> 29#include <xen/interface/memory.h> 30#include <xen/grant_table.h> 31 32#include <asm/xen/hypervisor.h> 33 34/**************************************************************************** 35 * grant table hack 36 * cmd: GNTTABOP_xxx 37 */ 38 39int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes, 40 unsigned long max_nr_gframes, 41 struct grant_entry **__shared) 42{ 43 *__shared = __va(frames[0] << PAGE_SHIFT); 44 return 0; 45} 46 47void arch_gnttab_unmap_shared(struct grant_entry *shared, 48 unsigned long nr_gframes) 49{ 50 /* nothing */ 51} 52 53static void 54gnttab_map_grant_ref_pre(struct gnttab_map_grant_ref *uop) 55{ 56 uint32_t flags; 57 58 flags = uop->flags; 59 60 if (flags & GNTMAP_host_map) { 61 if (flags & GNTMAP_application_map) { 62 printk(KERN_DEBUG 63 "GNTMAP_application_map is not supported yet: " 64 "flags 0x%x\n", flags); 65 BUG(); 66 } 67 if (flags & GNTMAP_contains_pte) { 68 printk(KERN_DEBUG 69 "GNTMAP_contains_pte is not supported yet: " 70 "flags 0x%x\n", flags); 71 BUG(); 72 } 73 } else if (flags & GNTMAP_device_map) { 74 printk("GNTMAP_device_map is not supported yet 0x%x\n", flags); 75 BUG(); /* not yet. actually this flag is not used. */ 76 } else { 77 BUG(); 78 } 79} 80 81int 82HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count) 83{ 84 if (cmd == GNTTABOP_map_grant_ref) { 85 unsigned int i; 86 for (i = 0; i < count; i++) { 87 gnttab_map_grant_ref_pre( 88 (struct gnttab_map_grant_ref *)uop + i); 89 } 90 } 91 return xencomm_hypercall_grant_table_op(cmd, uop, count); 92} 93 94EXPORT_SYMBOL(HYPERVISOR_grant_table_op); 95