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ACPICA: New: I/O port protection

Browse source 
Protect certain I/O ports from reads/writes. Provides MS
compatibility. New module, hwvalid.c

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2009-03-19 09:37:47 +08:00 committed by Len Brown
parent 20869dcfde
commit 7f07190390
12 changed files with 319 additions and 29 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/acpi/acpica/Makefile
View file

@ -18,7 +18,7 @@ obj-y += exconfig.o exfield.o exnames.o exoparg6.o exresolv.o exstorob.o\
excreate.o exmisc.o exoparg2.o exregion.o exstore.o exutils.o \
exdump.o exmutex.o exoparg3.o exresnte.o exstoren.o
obj-y += hwacpi.o hwgpe.o hwregs.o hwsleep.o hwxface.o
obj-y += hwacpi.o hwgpe.o hwregs.o hwsleep.o hwxface.o hwvalid.o
obj-$(ACPI_FUTURE_USAGE) += hwtimer.o

1
drivers/acpi/acpica/acglobal.h
View file

@ -252,6 +252,7 @@ ACPI_EXTERN u8 acpi_gbl_step_to_next_call;
ACPI_EXTERN u8 acpi_gbl_acpi_hardware_present;
ACPI_EXTERN u8 acpi_gbl_events_initialized;
ACPI_EXTERN u8 acpi_gbl_system_awake_and_running;
ACPI_EXTERN u8 acpi_gbl_osi_data;
#ifndef DEFINE_ACPI_GLOBALS

7
drivers/acpi/acpica/achware.h
View file

@ -72,6 +72,13 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value);
acpi_status acpi_hw_clear_acpi_status(void);
/*
* hwvalid - Port I/O with validation
*/
acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width);
acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width);
/*
* hwgpe - GPE support
*/

24
drivers/acpi/acpica/aclocal.h
View file

@ -863,6 +863,30 @@ struct acpi_bit_register_info {
#define ACPI_BITPOSITION_ARB_DISABLE 0x00
/* Structs and definitions for _OSI support and I/O port validation */
#define ACPI_OSI_WIN_2000 0x01
#define ACPI_OSI_WIN_XP 0x02
#define ACPI_OSI_WIN_XP_SP1 0x03
#define ACPI_OSI_WINSRV_2003 0x04
#define ACPI_OSI_WIN_XP_SP2 0x05
#define ACPI_OSI_WINSRV_2003_SP1 0x06
#define ACPI_OSI_WIN_VISTA 0x07
#define ACPI_ALWAYS_ILLEGAL 0x00
struct acpi_interface_info {
char *name;
u8 value;
};
struct acpi_port_info {
char *name;
u16 start;
u16 end;
u8 osi_dependency;
};
/*****************************************************************************
*
* Resource descriptors

4
drivers/acpi/acpica/exregion.c
View file

@ -294,14 +294,14 @@ acpi_ex_system_io_space_handler(u32 function,
switch (function) {
case ACPI_READ:
status = acpi_os_read_port((acpi_io_address) address,
status = acpi_hw_read_port((acpi_io_address) address,
&value32, bit_width);
*value = value32;
break;
case ACPI_WRITE:
status = acpi_os_write_port((acpi_io_address) address,
status = acpi_hw_write_port((acpi_io_address) address,
(u32) * value, bit_width);
break;

4
drivers/acpi/acpica/hwacpi.c
View file

@ -96,7 +96,7 @@ acpi_status acpi_hw_set_mode(u32 mode)
/* BIOS should have disabled ALL fixed and GP events */
status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
(u32) acpi_gbl_FADT.acpi_enable, 8);
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Attempting to enable ACPI mode\n"));
@ -108,7 +108,7 @@ acpi_status acpi_hw_set_mode(u32 mode)
* BIOS should clear all fixed status bits and restore fixed event
* enable bits to default
*/
status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
(u32) acpi_gbl_FADT.acpi_disable,
8);
ACPI_DEBUG_PRINT((ACPI_DB_INFO,

4
drivers/acpi/acpica/hwregs.c
View file

@ -222,7 +222,7 @@ acpi_hw_register_read(u32 register_id, u32 * return_value)
case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */
status =
acpi_os_read_port(acpi_gbl_FADT.smi_command, &value, 8);
acpi_hw_read_port(acpi_gbl_FADT.smi_command, &value, 8);
break;
default:
@ -356,7 +356,7 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value)
/* SMI_CMD is currently always in IO space */
status =
acpi_os_write_port(acpi_gbl_FADT.smi_command, value, 8);
acpi_hw_write_port(acpi_gbl_FADT.smi_command, value, 8);
break;
default:

2
drivers/acpi/acpica/hwsleep.c
View file

@ -430,7 +430,7 @@ acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
ACPI_FLUSH_CPU_CACHE();
status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
(u32) acpi_gbl_FADT.S4bios_request, 8);
do {

240
drivers/acpi/acpica/hwvalid.c Normal file
View file

@ -0,0 +1,240 @@
/******************************************************************************
*
* Module Name: hwvalid - I/O request validation
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2009, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include "accommon.h"
#define _COMPONENT ACPI_HARDWARE
ACPI_MODULE_NAME("hwvalid")
/* Local prototypes */
static acpi_status
acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width);
/*
* Protected I/O ports. Some ports are always illegal, and some are
* conditionally illegal. This table must remain ordered by port address.
*
* The table is used to implement the Microsoft port access rules that
* first appeared in Windows XP. Some ports are always illegal, and some
* ports are only illegal if the BIOS calls _OSI with a win_xP string or
* later (meaning that the BIOS itelf is post-XP.)
*
* This provides ACPICA with the desired port protections and
* Microsoft compatibility.
*/
static const struct acpi_port_info acpi_protected_ports[] = {
{"DMA1", 0x0000, 0x000F, ACPI_OSI_WIN_XP},
{"PIC0", 0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL},
{"PIT1", 0x0040, 0x0043, ACPI_OSI_WIN_XP},
{"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP},
{"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP},
{"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP},
{"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP},
{"DMA1", 0x0087, 0x0087, ACPI_OSI_WIN_XP},
{"DMA2", 0x0089, 0x0089, ACPI_OSI_WIN_XP},
{"DMA2", 0x008A, 0x008B, ACPI_OSI_WIN_XP},
{"DMA2", 0x008F, 0x008F, ACPI_OSI_WIN_XP},
{"Arb", 0x0090, 0x0091, ACPI_OSI_WIN_XP},
{"Setup", 0x0093, 0x0094, ACPI_OSI_WIN_XP},
{"POS", 0x0096, 0x0097, ACPI_OSI_WIN_XP},
{"PIC1", 0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL},
{"DMA", 0x00C0, 0x00DF, ACPI_OSI_WIN_XP},
{"ELCR", 0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL},
{"PCI", 0x0CF8, 0x0D00, ACPI_OSI_WIN_XP}
};
#define ACPI_PORT_INFO_ENTRIES ACPI_ARRAY_LENGTH (acpi_protected_ports)
/******************************************************************************
*
* FUNCTION: acpi_hw_validate_io_request
*
* PARAMETERS: Address Address of I/O port/register
* bit_width Number of bits (8,16,32)
*
* RETURN: Status
*
* DESCRIPTION: Validates an I/O request (address/length). Certain ports are
* always illegal and some ports are only illegal depending on
* the requests the BIOS AML code makes to the predefined
* _OSI method.
*
******************************************************************************/
static acpi_status
acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
{
u32 i;
u32 byte_width;
acpi_io_address last_address;
const struct acpi_port_info *port_info;
ACPI_FUNCTION_TRACE(hw_validate_io_request);
/* Supported widths are 8/16/32 */
if ((bit_width != 8) && (bit_width != 16) && (bit_width != 32)) {
return AE_BAD_PARAMETER;
}
port_info = acpi_protected_ports;
byte_width = ACPI_DIV_8(bit_width);
last_address = address + byte_width - 1;
ACPI_DEBUG_PRINT((ACPI_DB_IO, "Address %p LastAddress %p Length %X",
ACPI_CAST_PTR(void, address), ACPI_CAST_PTR(void,
last_address),
byte_width));
/* Maximum 16-bit address in I/O space */
if (last_address > ACPI_UINT16_MAX) {
ACPI_ERROR((AE_INFO,
"Illegal I/O port address/length above 64K: 0x%p/%X",
ACPI_CAST_PTR(void, address), byte_width));
return_ACPI_STATUS(AE_AML_ILLEGAL_ADDRESS);
}
/* Exit if requested address is not within the protected port table */
if (address > acpi_protected_ports[ACPI_PORT_INFO_ENTRIES - 1].end) {
return_ACPI_STATUS(AE_OK);
}
/* Check request against the list of protected I/O ports */
for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, port_info++) {
/*
* Check if the requested address range will write to a reserved
* port. Four cases to consider:
*
* 1) Address range is contained completely in the port address range
* 2) Address range overlaps port range at the port range start
* 3) Address range overlaps port range at the port range end
* 4) Address range completely encompasses the port range
*/
if ((address <= port_info->end)
&& (last_address >= port_info->start)) {
/* Port illegality may depend on the _OSI calls made by the BIOS */
if (acpi_gbl_osi_data >= port_info->osi_dependency) {
ACPI_ERROR((AE_INFO,
"Denied AML access to port 0x%p/%X (%s 0x%.4X-0x%.4X)",
ACPI_CAST_PTR(void, address),
byte_width, port_info->name,
port_info->start, port_info->end));
return_ACPI_STATUS(AE_AML_ILLEGAL_ADDRESS);
}
}
/* Finished if address range ends before the end of this port */
if (last_address <= port_info->end) {
break;
}
}
return_ACPI_STATUS(AE_OK);
}
/******************************************************************************
*
* FUNCTION: acpi_hw_read_port
*
* PARAMETERS: Address Address of I/O port/register to read
* Value Where value is placed
* Width Number of bits
*
* RETURN: Value read from port
*
* DESCRIPTION: Read data from an I/O port or register. This is a front-end
* to acpi_os_read_port that performs validation on both the port
* address and the length.
*
*****************************************************************************/
acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width)
{
acpi_status status;
status = acpi_hw_validate_io_request(address, width);
if (ACPI_FAILURE(status)) {
return status;
}
status = acpi_os_read_port(address, value, width);
return status;
}
/******************************************************************************
*
* FUNCTION: acpi_hw_write_port
*
* PARAMETERS: Address Address of I/O port/register to write
* Value Value to write
* Width Number of bits
*
* RETURN: None
*
* DESCRIPTION: Write data to an I/O port or register. This is a front-end
* to acpi_os_write_port that performs validation on both the port
* address and the length.
*
*****************************************************************************/
acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width)
{
acpi_status status;
status = acpi_hw_validate_io_request(address, width);
if (ACPI_FAILURE(status)) {
return status;
}
status = acpi_os_write_port(address, value, width);
return status;
}

4
drivers/acpi/acpica/hwxface.c
View file

@ -146,7 +146,7 @@ acpi_status acpi_read(u32 *value, struct acpi_generic_address *reg)
case ACPI_ADR_SPACE_SYSTEM_IO:
status =
acpi_os_read_port((acpi_io_address) address, value, width);
acpi_hw_read_port((acpi_io_address) address, value, width);
break;
default:
@ -220,7 +220,7 @@ acpi_status acpi_write(u32 value, struct acpi_generic_address *reg)
case ACPI_ADR_SPACE_SYSTEM_IO:
status = acpi_os_write_port((acpi_io_address) address, value,
status = acpi_hw_write_port((acpi_io_address) address, value,
width);
break;

55
drivers/acpi/acpica/uteval.c
View file

@ -59,26 +59,35 @@ acpi_ut_translate_one_cid(union acpi_operand_object *obj_desc,
/*
* Strings supported by the _OSI predefined (internal) method.
*
* March 2009: Removed "Linux" as this host no longer wants to respond true
* for this string. Basically, the only safe OS strings are windows-related
* and in many or most cases represent the only test path within the
* BIOS-provided ASL code.
*
* The second element of each entry is used to track the newest version of
* Windows that the BIOS has requested.
*/
static char *acpi_interfaces_supported[] = {
static struct acpi_interface_info acpi_interfaces_supported[] = {
/* Operating System Vendor Strings */
"Windows 2000", /* Windows 2000 */
"Windows 2001", /* Windows XP */
"Windows 2001 SP1", /* Windows XP SP1 */
"Windows 2001 SP2", /* Windows XP SP2 */
"Windows 2001.1", /* Windows Server 2003 */
"Windows 2001.1 SP1", /* Windows Server 2003 SP1 - Added 03/2006 */
"Windows 2006", /* Windows Vista - Added 03/2006 */
{"Windows 2000", ACPI_OSI_WIN_2000}, /* Windows 2000 */
{"Windows 2001", ACPI_OSI_WIN_XP}, /* Windows XP */
{"Windows 2001 SP1", ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */
{"Windows 2001.1", ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */
{"Windows 2001 SP2", ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */
{"Windows 2001.1 SP1", ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */
{"Windows 2006", ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */
/* Feature Group Strings */
"Extended Address Space Descriptor"
/*
* All "optional" feature group strings (features that are implemented
* by the host) should be implemented in the host version of
* acpi_os_validate_interface and should not be added here.
*/
{"Extended Address Space Descriptor", 0}
/*
* All "optional" feature group strings (features that are implemented
* by the host) should be implemented in the host version of
* acpi_os_validate_interface and should not be added here.
*/
};
/*******************************************************************************
@ -125,9 +134,17 @@ acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state)
for (i = 0; i < ACPI_ARRAY_LENGTH(acpi_interfaces_supported); i++) {
if (!ACPI_STRCMP(string_desc->string.pointer,
acpi_interfaces_supported[i])) {
/* The interface is supported */
acpi_interfaces_supported[i].name)) {
/*
* The interface is supported.
* Update the osi_data if necessary. We keep track of the latest
* version of Windows that has been requested by the BIOS.
*/
if (acpi_interfaces_supported[i].value >
acpi_gbl_osi_data) {
acpi_gbl_osi_data =
acpi_interfaces_supported[i].value;
}
return_value = ACPI_UINT32_MAX;
goto exit;
@ -176,8 +193,8 @@ acpi_status acpi_osi_invalidate(char *interface)
int i;
for (i = 0; i < ACPI_ARRAY_LENGTH(acpi_interfaces_supported); i++) {
if (!ACPI_STRCMP(interface, acpi_interfaces_supported[i])) {
*acpi_interfaces_supported[i] = '\0';
if (!ACPI_STRCMP(interface, acpi_interfaces_supported[i].name)) {
*acpi_interfaces_supported[i].name = '\0';
return AE_OK;
}
}

1
drivers/acpi/acpica/utglobal.c
View file

@ -789,6 +789,7 @@ acpi_status acpi_ut_init_globals(void)
acpi_gbl_trace_dbg_layer = 0;
acpi_gbl_debugger_configuration = DEBUGGER_THREADING;
acpi_gbl_db_output_flags = ACPI_DB_CONSOLE_OUTPUT;
acpi_gbl_osi_data = 0;
/* Hardware oriented */