1 /******************************************************************************
2 * x86/hvm/quirks.c
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; If not, see <http://www.gnu.org/licenses/>.
15 */
16
17 #include <xen/types.h>
18 #include <xen/init.h>
19 #include <xen/lib.h>
20 #include <xen/dmi.h>
21 #include <xen/bitmap.h>
22 #include <asm/hvm/support.h>
23
24 s8 __read_mostly hvm_port80_allowed = -1;
25 boolean_param("hvm_port80", hvm_port80_allowed);
26
dmi_hvm_deny_port80(struct dmi_system_id * id)27 static int __init dmi_hvm_deny_port80(/*const*/ struct dmi_system_id *id)
28 {
29 printk(XENLOG_WARNING "%s: port 0x80 access %s allowed for HVM guests\n",
30 id->ident, hvm_port80_allowed > 0 ? "forcibly" : "not");
31
32 if ( hvm_port80_allowed < 0 )
33 hvm_port80_allowed = 0;
34
35 return 0;
36 }
37
check_port80(void)38 static int __init check_port80(void)
39 {
40 /*
41 * Quirk table for systems that misbehave (lock up, etc.) if port
42 * 0x80 is used:
43 */
44 static struct dmi_system_id __initdata hvm_no_port80_dmi_table[] =
45 {
46 {
47 .callback = dmi_hvm_deny_port80,
48 .ident = "Compaq Presario V6000",
49 .matches = {
50 DMI_MATCH(DMI_BOARD_VENDOR, "Quanta"),
51 DMI_MATCH(DMI_BOARD_NAME, "30B7")
52 }
53 },
54 {
55 .callback = dmi_hvm_deny_port80,
56 .ident = "HP Pavilion dv9000z",
57 .matches = {
58 DMI_MATCH(DMI_BOARD_VENDOR, "Quanta"),
59 DMI_MATCH(DMI_BOARD_NAME, "30B9")
60 }
61 },
62 {
63 .callback = dmi_hvm_deny_port80,
64 .ident = "HP Pavilion dv6000",
65 .matches = {
66 DMI_MATCH(DMI_BOARD_VENDOR, "Quanta"),
67 DMI_MATCH(DMI_BOARD_NAME, "30B8")
68 }
69 },
70 {
71 .callback = dmi_hvm_deny_port80,
72 .ident = "HP Pavilion tx1000",
73 .matches = {
74 DMI_MATCH(DMI_BOARD_VENDOR, "Quanta"),
75 DMI_MATCH(DMI_BOARD_NAME, "30BF")
76 }
77 },
78 {
79 .callback = dmi_hvm_deny_port80,
80 .ident = "Presario F700",
81 .matches = {
82 DMI_MATCH(DMI_BOARD_VENDOR, "Quanta"),
83 DMI_MATCH(DMI_BOARD_NAME, "30D3")
84 }
85 },
86 { }
87 };
88
89 dmi_check_system(hvm_no_port80_dmi_table);
90
91 if ( !hvm_port80_allowed )
92 __set_bit(0x80, hvm_io_bitmap);
93
94 return 0;
95 }
96 __initcall(check_port80);
97