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author | Keir Fraser <keir.fraser@citrix.com> | 2009-06-16 13:52:13 +0100 |
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committer | Keir Fraser <keir.fraser@citrix.com> | 2009-06-16 13:52:13 +0100 |
commit | 360f174b3da63282f239c4c6f2a3a07d2a0751d6 (patch) | |
tree | 398b5a77ae4158c89da113301f6590b60d793854 /xen/arch/x86/hvm/quirks.c | |
parent | 767d7a478a86cb1a77f58bf0686a2df212d5a755 (diff) | |
download | xen-360f174b3da63282f239c4c6f2a3a07d2a0751d6.tar.gz xen-360f174b3da63282f239c4c6f2a3a07d2a0751d6.tar.bz2 xen-360f174b3da63282f239c4c6f2a3a07d2a0751d6.zip |
x86/hvm: don't pass through port 0x80 in a few special cases
In a recent commit (99f85a28a78e96d28907fe036e1671a218fee597), KVM
disabled the passthrough of this port due to known problems on certain
HP laptops (see
http://lkml.indiana.edu/hypermail/linux/kernel/0712.3/0872.html
and http://lkml.indiana.edu/hypermail/linux/kernel/0801.0/2388.html).
For Xen, don't do this globally, but rather based on a DMI black list.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Diffstat (limited to 'xen/arch/x86/hvm/quirks.c')
-rw-r--r-- | xen/arch/x86/hvm/quirks.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/xen/arch/x86/hvm/quirks.c b/xen/arch/x86/hvm/quirks.c new file mode 100644 index 0000000000..a49fa0d284 --- /dev/null +++ b/xen/arch/x86/hvm/quirks.c @@ -0,0 +1,93 @@ +/****************************************************************************** + * x86/hvm/quirks.c + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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 <xen/config.h> +#include <xen/types.h> +#include <xen/init.h> +#include <xen/lib.h> +#include <xen/dmi.h> + +int hvm_port80_allowed = -1; +boolean_param("hvm_port80", hvm_port80_allowed); + +static int __init dmi_hvm_deny_port80(/*const*/ struct dmi_system_id *id) +{ + printk(XENLOG_WARNING "%s: port 0x80 access %s allowed for HVM guests\n", + id->ident, hvm_port80_allowed > 0 ? "forcibly" : "not"); + + if ( hvm_port80_allowed < 0 ) + hvm_port80_allowed = 0; + + return 0; +} + +static int __init check_port80(void) +{ + /* + * Quirk table for systems that misbehave (lock up, etc.) if port + * 0x80 is used: + */ + static struct dmi_system_id __initdata hvm_no_port80_dmi_table[] = + { + { + .callback = dmi_hvm_deny_port80, + .ident = "Compaq Presario V6000", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Quanta"), + DMI_MATCH(DMI_BOARD_NAME, "30B7") + } + }, + { + .callback = dmi_hvm_deny_port80, + .ident = "HP Pavilion dv9000z", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Quanta"), + DMI_MATCH(DMI_BOARD_NAME, "30B9") + } + }, + { + .callback = dmi_hvm_deny_port80, + .ident = "HP Pavilion dv6000", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Quanta"), + DMI_MATCH(DMI_BOARD_NAME, "30B8") + } + }, + { + .callback = dmi_hvm_deny_port80, + .ident = "HP Pavilion tx1000", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Quanta"), + DMI_MATCH(DMI_BOARD_NAME, "30BF") + } + }, + { + .callback = dmi_hvm_deny_port80, + .ident = "Presario F700", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Quanta"), + DMI_MATCH(DMI_BOARD_NAME, "30D3") + } + }, + { } + }; + + dmi_check_system(hvm_no_port80_dmi_table); + + return 0; +} +__initcall(check_port80); |