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/* SPDX-License-Identifier: GPL-2.0-only */
/******************************************************************************
* x86/hvm/quirks.c
*/
#include <xen/types.h>
#include <xen/init.h>
#include <xen/lib.h>
#include <xen/dmi.h>
#include <xen/bitmap.h>
#include <xen/param.h>
#include <asm/hvm/support.h>
s8 __read_mostly hvm_port80_allowed = -1;
boolean_param("hvm_port80", hvm_port80_allowed);
static int __init cf_check 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 cf_check check_port80(void)
{
/*
* Quirk table for systems that misbehave (lock up, etc.) if port
* 0x80 is used:
*/
static const struct dmi_system_id __initconstrel 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);
if ( !hvm_port80_allowed )
__set_bit(0x80, hvm_io_bitmap);
return 0;
}
__initcall(check_port80);
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