diff options
author | Bob Moore <robert.moore@intel.com> | 2009-03-19 01:37:47 (GMT) |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2009-03-27 16:11:03 (GMT) |
commit | 7f0719039085cc40114abce84cf29fe57da226f4 (patch) | |
tree | 8e210cd936bfb11fdc122b44d79100660b8ffb6a /drivers/acpi | |
parent | 20869dcfde204e1c21b642608d708d82472fee2b (diff) | |
download | linux-fsl-qoriq-7f0719039085cc40114abce84cf29fe57da226f4.tar.xz |
ACPICA: New: I/O port protection
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>
Diffstat (limited to 'drivers/acpi')
-rw-r--r-- | drivers/acpi/acpica/Makefile | 2 | ||||
-rw-r--r-- | drivers/acpi/acpica/acglobal.h | 1 | ||||
-rw-r--r-- | drivers/acpi/acpica/achware.h | 7 | ||||
-rw-r--r-- | drivers/acpi/acpica/aclocal.h | 24 | ||||
-rw-r--r-- | drivers/acpi/acpica/exregion.c | 4 | ||||
-rw-r--r-- | drivers/acpi/acpica/hwacpi.c | 4 | ||||
-rw-r--r-- | drivers/acpi/acpica/hwregs.c | 4 | ||||
-rw-r--r-- | drivers/acpi/acpica/hwsleep.c | 2 | ||||
-rw-r--r-- | drivers/acpi/acpica/hwvalid.c | 240 | ||||
-rw-r--r-- | drivers/acpi/acpica/hwxface.c | 4 | ||||
-rw-r--r-- | drivers/acpi/acpica/uteval.c | 55 | ||||
-rw-r--r-- | drivers/acpi/acpica/utglobal.c | 1 |
12 files changed, 319 insertions, 29 deletions
diff --git a/drivers/acpi/acpica/Makefile b/drivers/acpi/acpica/Makefile index 290be74..17e5082 100644 --- a/drivers/acpi/acpica/Makefile +++ b/drivers/acpi/acpica/Makefile @@ -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 diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h index f431b99..16e5210 100644 --- a/drivers/acpi/acpica/acglobal.h +++ b/drivers/acpi/acpica/acglobal.h @@ -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 diff --git a/drivers/acpi/acpica/achware.h b/drivers/acpi/acpica/achware.h index 4fa6ee6..4afa3d8 100644 --- a/drivers/acpi/acpica/achware.h +++ b/drivers/acpi/acpica/achware.h @@ -73,6 +73,13 @@ 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 */ acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info); diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h index f01e155..42ef0cb 100644 --- a/drivers/acpi/acpica/aclocal.h +++ b/drivers/acpi/acpica/aclocal.h @@ -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 diff --git a/drivers/acpi/acpica/exregion.c b/drivers/acpi/acpica/exregion.c index 76ec8ff..3a54b73 100644 --- a/drivers/acpi/acpica/exregion.c +++ b/drivers/acpi/acpica/exregion.c @@ -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; diff --git a/drivers/acpi/acpica/hwacpi.c b/drivers/acpi/acpica/hwacpi.c index e7949b1..9af361a 100644 --- a/drivers/acpi/acpica/hwacpi.c +++ b/drivers/acpi/acpica/hwacpi.c @@ -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, diff --git a/drivers/acpi/acpica/hwregs.c b/drivers/acpi/acpica/hwregs.c index 6117362..f8ee0a7 100644 --- a/drivers/acpi/acpica/hwregs.c +++ b/drivers/acpi/acpica/hwregs.c @@ -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: diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c index 2ea4c59..baa5fc0 100644 --- a/drivers/acpi/acpica/hwsleep.c +++ b/drivers/acpi/acpica/hwsleep.c @@ -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 { diff --git a/drivers/acpi/acpica/hwvalid.c b/drivers/acpi/acpica/hwvalid.c new file mode 100644 index 0000000..e0b562f --- /dev/null +++ b/drivers/acpi/acpica/hwvalid.c @@ -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; +} diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c index 26e6642..9829979 100644 --- a/drivers/acpi/acpica/hwxface.c +++ b/drivers/acpi/acpica/hwxface.c @@ -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; diff --git a/drivers/acpi/acpica/uteval.c b/drivers/acpi/acpica/uteval.c index 3b91525..006b16c 100644 --- a/drivers/acpi/acpica/uteval.c +++ b/drivers/acpi/acpica/uteval.c @@ -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; } } diff --git a/drivers/acpi/acpica/utglobal.c b/drivers/acpi/acpica/utglobal.c index 256ce77..59e46f2 100644 --- a/drivers/acpi/acpica/utglobal.c +++ b/drivers/acpi/acpica/utglobal.c @@ -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 */ |