Isaku Yamahata | 7ad8631 | 2008-10-17 11:17:55 +0900 | [diff] [blame] | 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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 25 | #include <linux/slab.h> |
Isaku Yamahata | 7ad8631 | 2008-10-17 11:17:55 +0900 | [diff] [blame] | 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 | |
Isaku Yamahata | 7ad8631 | 2008-10-17 11:17:55 +0900 | [diff] [blame] | 34 | /**************************************************************************** |
| 35 | * grant table hack |
| 36 | * cmd: GNTTABOP_xxx |
| 37 | */ |
| 38 | |
| 39 | int 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 | |
| 47 | void arch_gnttab_unmap_shared(struct grant_entry *shared, |
| 48 | unsigned long nr_gframes) |
| 49 | { |
| 50 | /* nothing */ |
| 51 | } |
| 52 | |
| 53 | static void |
| 54 | gnttab_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 | |
| 81 | int |
| 82 | HYPERVISOR_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 | |
| 94 | EXPORT_SYMBOL(HYPERVISOR_grant_table_op); |