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
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/******************************************************************************
* dom0_core.c
*
* Interface to privileged domain-0 commands.
*
* Copyright (c) 2002-2003, K A Fraser, B Dragovic
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/mman.h>
#include <linux/swap.h>
#include <linux/smp_lock.h>
#include <linux/swapctl.h>
#include <linux/iobuf.h>
#include <linux/highmem.h>
#include <linux/pagemap.h>
#include <linux/seq_file.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
#include <asm/tlb.h>
#include <asm/proc_cmd.h>
#include <asm/hypervisor-ifs/dom0_ops.h>
#include <asm/xeno_proc.h>
#include "../block/xl_block.h"
static struct proc_dir_entry *privcmd_intf;
static int privcmd_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long data)
{
int ret = 0;
switch ( cmd )
{
case IOCTL_PRIVCMD_HYPERCALL:
{
privcmd_hypercall_t hypercall;
if ( copy_from_user(&hypercall, (void *)data, sizeof(hypercall)) )
return -EFAULT;
__asm__ __volatile__ (
"pushl %%ebx; pushl %%ecx; pushl %%edx; pushl %%esi; pushl %%edi; "
"movl 4(%%eax),%%ebx ;"
"movl 8(%%eax),%%ecx ;"
"movl 12(%%eax),%%edx ;"
"movl 16(%%eax),%%esi ;"
"movl 20(%%eax),%%edi ;"
"movl (%%eax),%%eax ;"
TRAP_INSTR "; "
"popl %%edi; popl %%esi; popl %%edx; popl %%ecx; popl %%ebx"
: "=a" (ret) : "0" (&hypercall) : "memory" );
}
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static struct file_operations privcmd_file_ops = {
ioctl : privcmd_ioctl
};
static int __init init_module(void)
{
if ( !(start_info.flags & SIF_PRIVILEGED) )
return 0;
/* xeno control interface */
privcmd_intf = create_xeno_proc_entry("privcmd", 0400);
if ( privcmd_intf != NULL )
{
privcmd_intf->owner = THIS_MODULE;
privcmd_intf->nlink = 1;
privcmd_intf->proc_fops = &privcmd_file_ops;
}
return 0;
}
static void __exit cleanup_module(void)
{
if ( privcmd_intf == NULL ) return;
remove_xeno_proc_entry("privcmd");
privcmd_intf = NULL;
}
module_init(init_module);
module_exit(cleanup_module);
|
