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>
This commit is contained in:
Bob Moore
Len Brown
Родитель
20869dcfde
Коммит
7f07190390
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@ -18,7 +18,7 @@ obj-y += exconfig.o exfield.o exnames.o exoparg6.o exresolv.o exstorob.o\
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excreate.o exmisc.o exoparg2.o exregion.o exstore.o exutils.o \
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exdump.o exmutex.o exoparg3.o exresnte.o exstoren.o
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obj-y += hwacpi.o hwgpe.o hwregs.o hwsleep.o hwxface.o
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obj-y += hwacpi.o hwgpe.o hwregs.o hwsleep.o hwxface.o hwvalid.o
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obj-$(ACPI_FUTURE_USAGE) += hwtimer.o
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@ -252,6 +252,7 @@ ACPI_EXTERN u8 acpi_gbl_step_to_next_call;
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ACPI_EXTERN u8 acpi_gbl_acpi_hardware_present;
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ACPI_EXTERN u8 acpi_gbl_events_initialized;
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ACPI_EXTERN u8 acpi_gbl_system_awake_and_running;
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ACPI_EXTERN u8 acpi_gbl_osi_data;
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#ifndef DEFINE_ACPI_GLOBALS
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@ -72,6 +72,13 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value);
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acpi_status acpi_hw_clear_acpi_status(void);
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/*
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* hwvalid - Port I/O with validation
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*/
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acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width);
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acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width);
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/*
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* hwgpe - GPE support
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*/
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@ -863,6 +863,30 @@ struct acpi_bit_register_info {
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#define ACPI_BITPOSITION_ARB_DISABLE 0x00
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/* Structs and definitions for _OSI support and I/O port validation */
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#define ACPI_OSI_WIN_2000 0x01
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#define ACPI_OSI_WIN_XP 0x02
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#define ACPI_OSI_WIN_XP_SP1 0x03
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#define ACPI_OSI_WINSRV_2003 0x04
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#define ACPI_OSI_WIN_XP_SP2 0x05
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#define ACPI_OSI_WINSRV_2003_SP1 0x06
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#define ACPI_OSI_WIN_VISTA 0x07
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#define ACPI_ALWAYS_ILLEGAL 0x00
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struct acpi_interface_info {
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char *name;
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u8 value;
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};
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struct acpi_port_info {
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char *name;
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u16 start;
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u16 end;
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u8 osi_dependency;
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};
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/*****************************************************************************
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*
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* Resource descriptors
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@ -294,14 +294,14 @@ acpi_ex_system_io_space_handler(u32 function,
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switch (function) {
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case ACPI_READ:
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status = acpi_os_read_port((acpi_io_address) address,
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status = acpi_hw_read_port((acpi_io_address) address,
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&value32, bit_width);
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*value = value32;
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break;
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case ACPI_WRITE:
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status = acpi_os_write_port((acpi_io_address) address,
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status = acpi_hw_write_port((acpi_io_address) address,
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(u32) * value, bit_width);
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break;
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@ -96,7 +96,7 @@ acpi_status acpi_hw_set_mode(u32 mode)
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/* BIOS should have disabled ALL fixed and GP events */
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status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
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status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
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(u32) acpi_gbl_FADT.acpi_enable, 8);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Attempting to enable ACPI mode\n"));
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@ -108,7 +108,7 @@ acpi_status acpi_hw_set_mode(u32 mode)
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* BIOS should clear all fixed status bits and restore fixed event
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* enable bits to default
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*/
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status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
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status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
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(u32) acpi_gbl_FADT.acpi_disable,
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8);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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@ -222,7 +222,7 @@ acpi_hw_register_read(u32 register_id, u32 * return_value)
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case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */
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status =
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acpi_os_read_port(acpi_gbl_FADT.smi_command, &value, 8);
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acpi_hw_read_port(acpi_gbl_FADT.smi_command, &value, 8);
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break;
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default:
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@ -356,7 +356,7 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value)
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/* SMI_CMD is currently always in IO space */
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status =
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acpi_os_write_port(acpi_gbl_FADT.smi_command, value, 8);
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acpi_hw_write_port(acpi_gbl_FADT.smi_command, value, 8);
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break;
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default:
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@ -430,7 +430,7 @@ acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
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ACPI_FLUSH_CPU_CACHE();
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status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
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status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
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(u32) acpi_gbl_FADT.S4bios_request, 8);
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do {
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@ -0,0 +1,240 @@
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/******************************************************************************
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*
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* Module Name: hwvalid - I/O request validation
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2009, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME("hwvalid")
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/* Local prototypes */
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static acpi_status
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acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width);
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/*
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* Protected I/O ports. Some ports are always illegal, and some are
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* conditionally illegal. This table must remain ordered by port address.
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*
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* The table is used to implement the Microsoft port access rules that
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* first appeared in Windows XP. Some ports are always illegal, and some
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* ports are only illegal if the BIOS calls _OSI with a win_xP string or
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* later (meaning that the BIOS itelf is post-XP.)
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*
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* This provides ACPICA with the desired port protections and
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* Microsoft compatibility.
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*/
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static const struct acpi_port_info acpi_protected_ports[] = {
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{"DMA1", 0x0000, 0x000F, ACPI_OSI_WIN_XP},
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{"PIC0", 0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL},
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{"PIT1", 0x0040, 0x0043, ACPI_OSI_WIN_XP},
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{"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP},
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{"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP},
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{"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP},
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{"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP},
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{"DMA1", 0x0087, 0x0087, ACPI_OSI_WIN_XP},
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{"DMA2", 0x0089, 0x0089, ACPI_OSI_WIN_XP},
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{"DMA2", 0x008A, 0x008B, ACPI_OSI_WIN_XP},
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{"DMA2", 0x008F, 0x008F, ACPI_OSI_WIN_XP},
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{"Arb", 0x0090, 0x0091, ACPI_OSI_WIN_XP},
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{"Setup", 0x0093, 0x0094, ACPI_OSI_WIN_XP},
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{"POS", 0x0096, 0x0097, ACPI_OSI_WIN_XP},
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{"PIC1", 0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL},
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{"DMA", 0x00C0, 0x00DF, ACPI_OSI_WIN_XP},
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{"ELCR", 0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL},
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{"PCI", 0x0CF8, 0x0D00, ACPI_OSI_WIN_XP}
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};
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#define ACPI_PORT_INFO_ENTRIES ACPI_ARRAY_LENGTH (acpi_protected_ports)
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_validate_io_request
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*
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* PARAMETERS: Address Address of I/O port/register
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* bit_width Number of bits (8,16,32)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Validates an I/O request (address/length). Certain ports are
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* always illegal and some ports are only illegal depending on
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* the requests the BIOS AML code makes to the predefined
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* _OSI method.
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*
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******************************************************************************/
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static acpi_status
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acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
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{
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u32 i;
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u32 byte_width;
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acpi_io_address last_address;
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const struct acpi_port_info *port_info;
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ACPI_FUNCTION_TRACE(hw_validate_io_request);
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/* Supported widths are 8/16/32 */
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if ((bit_width != 8) && (bit_width != 16) && (bit_width != 32)) {
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return AE_BAD_PARAMETER;
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}
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port_info = acpi_protected_ports;
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byte_width = ACPI_DIV_8(bit_width);
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last_address = address + byte_width - 1;
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ACPI_DEBUG_PRINT((ACPI_DB_IO, "Address %p LastAddress %p Length %X",
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ACPI_CAST_PTR(void, address), ACPI_CAST_PTR(void,
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last_address),
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byte_width));
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/* Maximum 16-bit address in I/O space */
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if (last_address > ACPI_UINT16_MAX) {
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ACPI_ERROR((AE_INFO,
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"Illegal I/O port address/length above 64K: 0x%p/%X",
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ACPI_CAST_PTR(void, address), byte_width));
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return_ACPI_STATUS(AE_AML_ILLEGAL_ADDRESS);
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}
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/* Exit if requested address is not within the protected port table */
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if (address > acpi_protected_ports[ACPI_PORT_INFO_ENTRIES - 1].end) {
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return_ACPI_STATUS(AE_OK);
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}
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/* Check request against the list of protected I/O ports */
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for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, port_info++) {
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/*
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* Check if the requested address range will write to a reserved
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* port. Four cases to consider:
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*
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* 1) Address range is contained completely in the port address range
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* 2) Address range overlaps port range at the port range start
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* 3) Address range overlaps port range at the port range end
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* 4) Address range completely encompasses the port range
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*/
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if ((address <= port_info->end)
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&& (last_address >= port_info->start)) {
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/* Port illegality may depend on the _OSI calls made by the BIOS */
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if (acpi_gbl_osi_data >= port_info->osi_dependency) {
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ACPI_ERROR((AE_INFO,
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"Denied AML access to port 0x%p/%X (%s 0x%.4X-0x%.4X)",
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ACPI_CAST_PTR(void, address),
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byte_width, port_info->name,
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port_info->start, port_info->end));
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return_ACPI_STATUS(AE_AML_ILLEGAL_ADDRESS);
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}
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}
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/* Finished if address range ends before the end of this port */
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if (last_address <= port_info->end) {
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break;
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}
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}
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return_ACPI_STATUS(AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_read_port
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*
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* PARAMETERS: Address Address of I/O port/register to read
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* Value Where value is placed
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* Width Number of bits
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*
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* RETURN: Value read from port
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*
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* DESCRIPTION: Read data from an I/O port or register. This is a front-end
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* to acpi_os_read_port that performs validation on both the port
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* address and the length.
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*
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*****************************************************************************/
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acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width)
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{
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acpi_status status;
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status = acpi_hw_validate_io_request(address, width);
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if (ACPI_FAILURE(status)) {
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return status;
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}
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status = acpi_os_read_port(address, value, width);
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return status;
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_hw_write_port
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*
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* PARAMETERS: Address Address of I/O port/register to write
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* Value Value to write
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* Width Number of bits
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*
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* RETURN: None
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*
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* DESCRIPTION: Write data to an I/O port or register. This is a front-end
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* to acpi_os_write_port that performs validation on both the port
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* address and the length.
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*
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*****************************************************************************/
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acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width)
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{
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acpi_status status;
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status = acpi_hw_validate_io_request(address, width);
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if (ACPI_FAILURE(status)) {
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return status;
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}
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status = acpi_os_write_port(address, value, width);
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return status;
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}
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@ -146,7 +146,7 @@ acpi_status acpi_read(u32 *value, struct acpi_generic_address *reg)
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case ACPI_ADR_SPACE_SYSTEM_IO:
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status =
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acpi_os_read_port((acpi_io_address) address, value, width);
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acpi_hw_read_port((acpi_io_address) address, value, width);
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break;
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default:
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@ -220,7 +220,7 @@ acpi_status acpi_write(u32 value, struct acpi_generic_address *reg)
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case ACPI_ADR_SPACE_SYSTEM_IO:
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status = acpi_os_write_port((acpi_io_address) address, value,
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status = acpi_hw_write_port((acpi_io_address) address, value,
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width);
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break;
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@ -59,26 +59,35 @@ acpi_ut_translate_one_cid(union acpi_operand_object *obj_desc,
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/*
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* Strings supported by the _OSI predefined (internal) method.
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*
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* March 2009: Removed "Linux" as this host no longer wants to respond true
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* for this string. Basically, the only safe OS strings are windows-related
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* and in many or most cases represent the only test path within the
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* BIOS-provided ASL code.
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*
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* The second element of each entry is used to track the newest version of
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* Windows that the BIOS has requested.
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*/
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static char *acpi_interfaces_supported[] = {
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static struct acpi_interface_info acpi_interfaces_supported[] = {
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/* Operating System Vendor Strings */
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"Windows 2000", /* Windows 2000 */
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"Windows 2001", /* Windows XP */
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"Windows 2001 SP1", /* Windows XP SP1 */
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"Windows 2001 SP2", /* Windows XP SP2 */
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"Windows 2001.1", /* Windows Server 2003 */
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"Windows 2001.1 SP1", /* Windows Server 2003 SP1 - Added 03/2006 */
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"Windows 2006", /* Windows Vista - Added 03/2006 */
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{"Windows 2000", ACPI_OSI_WIN_2000}, /* Windows 2000 */
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{"Windows 2001", ACPI_OSI_WIN_XP}, /* Windows XP */
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{"Windows 2001 SP1", ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */
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{"Windows 2001.1", ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */
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{"Windows 2001 SP2", ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */
|
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{"Windows 2001.1 SP1", ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */
|
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{"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;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -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 */
|
||||
|
||||
|
|
|
|||
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