1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/******************************************************************************
* arch/ia64/xen/grant-table.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/module.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <xen/interface/xen.h>
#include <xen/interface/memory.h>
#include <xen/grant_table.h>
#include <asm/xen/hypervisor.h>
/****************************************************************************
* grant table hack
* cmd: GNTTABOP_xxx
*/
int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
unsigned long max_nr_gframes,
struct grant_entry **__shared)
{
*__shared = __va(frames[0] << PAGE_SHIFT);
return 0;
}
void arch_gnttab_unmap_shared(struct grant_entry *shared,
unsigned long nr_gframes)
{
/* nothing */
}
static void
gnttab_map_grant_ref_pre(struct gnttab_map_grant_ref *uop)
{
uint32_t flags;
flags = uop->flags;
if (flags & GNTMAP_host_map) {
if (flags & GNTMAP_application_map) {
printk(KERN_DEBUG
"GNTMAP_application_map is not supported yet: "
"flags 0x%x\n", flags);
BUG();
}
if (flags & GNTMAP_contains_pte) {
printk(KERN_DEBUG
"GNTMAP_contains_pte is not supported yet: "
"flags 0x%x\n", flags);
BUG();
}
} else if (flags & GNTMAP_device_map) {
printk("GNTMAP_device_map is not supported yet 0x%x\n", flags);
BUG(); /* not yet. actually this flag is not used. */
} else {
BUG();
}
}
int
HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
{
if (cmd == GNTTABOP_map_grant_ref) {
unsigned int i;
for (i = 0; i < count; i++) {
gnttab_map_grant_ref_pre(
(struct gnttab_map_grant_ref *)uop + i);
}
}
return xencomm_hypercall_grant_table_op(cmd, uop, count);
}
EXPORT_SYMBOL(HYPERVISOR_grant_table_op);
|
