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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> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
7ad86313 IY |
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 | ||
7ad86313 IY |
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); |