mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
32e62c636a
This closes a couple holes in our attribute aliasing avoidance scheme:
- The current kernel fails mmaps of some /dev/mem MMIO regions because
they don't appear in the EFI memory map. This keeps X from working
on the Intel Tiger box.
- The current kernel allows UC mmap of the 0-1MB region of
/sys/.../legacy_mem even when the chipset doesn't support UC
access. This causes an MCA when starting X on HP rx7620 and rx8620
boxes in the default configuration.
There's more detail in the Documentation/ia64/aliasing.txt file this
adds, but the general idea is that if a region might be covered by
a granule-sized kernel identity mapping, any access via /dev/mem or
mmap must use the same attribute as the identity mapping.
Otherwise, we fall back to using an attribute that is supported
according to the EFI memory map, or to using UC if the EFI memory
map doesn't mention the region.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
397 lines
12 KiB
C
397 lines
12 KiB
C
#ifndef _LINUX_EFI_H
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#define _LINUX_EFI_H
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/*
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* Extensible Firmware Interface
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* Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
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*
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* Copyright (C) 1999 VA Linux Systems
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* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
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* Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
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* David Mosberger-Tang <davidm@hpl.hp.com>
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* Stephane Eranian <eranian@hpl.hp.com>
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*/
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/time.h>
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/rtc.h>
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#include <linux/ioport.h>
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#include <asm/page.h>
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#include <asm/system.h>
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#define EFI_SUCCESS 0
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#define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1)))
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#define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1)))
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#define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1)))
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#define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1)))
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#define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1)))
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#define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1)))
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typedef unsigned long efi_status_t;
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typedef u8 efi_bool_t;
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typedef u16 efi_char16_t; /* UNICODE character */
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typedef struct {
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u8 b[16];
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} efi_guid_t;
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#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
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((efi_guid_t) \
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{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
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(b) & 0xff, ((b) >> 8) & 0xff, \
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(c) & 0xff, ((c) >> 8) & 0xff, \
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(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
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/*
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* Generic EFI table header
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*/
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typedef struct {
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u64 signature;
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u32 revision;
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u32 headersize;
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u32 crc32;
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u32 reserved;
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} efi_table_hdr_t;
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/*
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* Memory map descriptor:
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*/
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/* Memory types: */
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#define EFI_RESERVED_TYPE 0
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#define EFI_LOADER_CODE 1
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#define EFI_LOADER_DATA 2
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#define EFI_BOOT_SERVICES_CODE 3
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#define EFI_BOOT_SERVICES_DATA 4
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#define EFI_RUNTIME_SERVICES_CODE 5
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#define EFI_RUNTIME_SERVICES_DATA 6
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#define EFI_CONVENTIONAL_MEMORY 7
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#define EFI_UNUSABLE_MEMORY 8
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#define EFI_ACPI_RECLAIM_MEMORY 9
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#define EFI_ACPI_MEMORY_NVS 10
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#define EFI_MEMORY_MAPPED_IO 11
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#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
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#define EFI_PAL_CODE 13
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#define EFI_MAX_MEMORY_TYPE 14
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/* Attribute values: */
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#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
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#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
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#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
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#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
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#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
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#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
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#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
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#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
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#define EFI_MEMORY_DESCRIPTOR_VERSION 1
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#define EFI_PAGE_SHIFT 12
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typedef struct {
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u32 type;
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u32 pad;
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u64 phys_addr;
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u64 virt_addr;
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u64 num_pages;
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u64 attribute;
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} efi_memory_desc_t;
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typedef int (*efi_freemem_callback_t) (unsigned long start, unsigned long end, void *arg);
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/*
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* Types and defines for Time Services
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*/
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#define EFI_TIME_ADJUST_DAYLIGHT 0x1
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#define EFI_TIME_IN_DAYLIGHT 0x2
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#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
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typedef struct {
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u16 year;
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u8 month;
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u8 day;
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u8 hour;
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u8 minute;
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u8 second;
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u8 pad1;
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u32 nanosecond;
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s16 timezone;
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u8 daylight;
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u8 pad2;
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} efi_time_t;
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typedef struct {
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u32 resolution;
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u32 accuracy;
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u8 sets_to_zero;
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} efi_time_cap_t;
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/*
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* Types and defines for EFI ResetSystem
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*/
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#define EFI_RESET_COLD 0
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#define EFI_RESET_WARM 1
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#define EFI_RESET_SHUTDOWN 2
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/*
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* EFI Runtime Services table
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*/
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#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
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#define EFI_RUNTIME_SERVICES_REVISION 0x00010000
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typedef struct {
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efi_table_hdr_t hdr;
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unsigned long get_time;
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unsigned long set_time;
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unsigned long get_wakeup_time;
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unsigned long set_wakeup_time;
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unsigned long set_virtual_address_map;
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unsigned long convert_pointer;
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unsigned long get_variable;
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unsigned long get_next_variable;
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unsigned long set_variable;
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unsigned long get_next_high_mono_count;
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unsigned long reset_system;
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} efi_runtime_services_t;
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typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
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typedef efi_status_t efi_set_time_t (efi_time_t *tm);
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typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
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efi_time_t *tm);
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typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
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typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
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unsigned long *data_size, void *data);
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typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
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efi_guid_t *vendor);
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typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
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unsigned long attr, unsigned long data_size,
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void *data);
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typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
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typedef void efi_reset_system_t (int reset_type, efi_status_t status,
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unsigned long data_size, efi_char16_t *data);
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typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
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unsigned long descriptor_size,
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u32 descriptor_version,
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efi_memory_desc_t *virtual_map);
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/*
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* EFI Configuration Table and GUID definitions
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*/
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#define NULL_GUID \
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EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
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#define MPS_TABLE_GUID \
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EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define ACPI_TABLE_GUID \
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EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define ACPI_20_TABLE_GUID \
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EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
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#define SMBIOS_TABLE_GUID \
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EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define SAL_SYSTEM_TABLE_GUID \
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EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define HCDP_TABLE_GUID \
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EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
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#define UGA_IO_PROTOCOL_GUID \
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EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
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#define EFI_GLOBAL_VARIABLE_GUID \
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EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
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typedef struct {
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efi_guid_t guid;
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unsigned long table;
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} efi_config_table_t;
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#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
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#define EFI_SYSTEM_TABLE_REVISION ((1 << 16) | 00)
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typedef struct {
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efi_table_hdr_t hdr;
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unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
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u32 fw_revision;
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unsigned long con_in_handle;
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unsigned long con_in;
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unsigned long con_out_handle;
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unsigned long con_out;
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unsigned long stderr_handle;
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unsigned long stderr;
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efi_runtime_services_t *runtime;
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unsigned long boottime;
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unsigned long nr_tables;
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unsigned long tables;
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} efi_system_table_t;
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struct efi_memory_map {
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void *phys_map;
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void *map;
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void *map_end;
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int nr_map;
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unsigned long desc_version;
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unsigned long desc_size;
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};
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#define EFI_INVALID_TABLE_ADDR (~0UL)
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/*
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* All runtime access to EFI goes through this structure:
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*/
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extern struct efi {
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efi_system_table_t *systab; /* EFI system table */
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unsigned long mps; /* MPS table */
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unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
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unsigned long acpi20; /* ACPI table (ACPI 2.0) */
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unsigned long smbios; /* SM BIOS table */
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unsigned long sal_systab; /* SAL system table */
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unsigned long boot_info; /* boot info table */
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unsigned long hcdp; /* HCDP table */
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unsigned long uga; /* UGA table */
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efi_get_time_t *get_time;
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efi_set_time_t *set_time;
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efi_get_wakeup_time_t *get_wakeup_time;
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efi_set_wakeup_time_t *set_wakeup_time;
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efi_get_variable_t *get_variable;
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efi_get_next_variable_t *get_next_variable;
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efi_set_variable_t *set_variable;
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efi_get_next_high_mono_count_t *get_next_high_mono_count;
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efi_reset_system_t *reset_system;
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efi_set_virtual_address_map_t *set_virtual_address_map;
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} efi;
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static inline int
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efi_guidcmp (efi_guid_t left, efi_guid_t right)
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{
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return memcmp(&left, &right, sizeof (efi_guid_t));
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}
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static inline char *
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efi_guid_unparse(efi_guid_t *guid, char *out)
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{
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sprintf(out, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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guid->b[3], guid->b[2], guid->b[1], guid->b[0],
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guid->b[5], guid->b[4], guid->b[7], guid->b[6],
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guid->b[8], guid->b[9], guid->b[10], guid->b[11],
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guid->b[12], guid->b[13], guid->b[14], guid->b[15]);
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return out;
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}
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extern void efi_init (void);
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extern void *efi_get_pal_addr (void);
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extern void efi_map_pal_code (void);
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extern void efi_map_memmap(void);
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extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
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extern void efi_gettimeofday (struct timespec *ts);
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extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
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extern u64 efi_get_iobase (void);
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extern u32 efi_mem_type (unsigned long phys_addr);
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extern u64 efi_mem_attributes (unsigned long phys_addr);
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extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
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extern int efi_mem_attribute_range (unsigned long phys_addr, unsigned long size,
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u64 attr);
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extern int __init efi_uart_console_only (void);
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extern void efi_initialize_iomem_resources(struct resource *code_resource,
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struct resource *data_resource);
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extern unsigned long __init efi_get_time(void);
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extern int __init efi_set_rtc_mmss(unsigned long nowtime);
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extern struct efi_memory_map memmap;
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/**
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* efi_range_is_wc - check the WC bit on an address range
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* @start: starting kvirt address
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* @len: length of range
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*
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* Consult the EFI memory map and make sure it's ok to set this range WC.
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* Returns true or false.
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*/
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static inline int efi_range_is_wc(unsigned long start, unsigned long len)
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{
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unsigned long i;
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for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
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unsigned long paddr = __pa(start + i);
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if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
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return 0;
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}
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/* The range checked out */
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return 1;
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}
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#ifdef CONFIG_EFI_PCDP
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extern int __init efi_setup_pcdp_console(char *);
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#endif
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/*
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* We play games with efi_enabled so that the compiler will, if possible, remove
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* EFI-related code altogether.
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*/
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#ifdef CONFIG_EFI
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# ifdef CONFIG_X86
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extern int efi_enabled;
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# else
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# define efi_enabled 1
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# endif
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#else
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# define efi_enabled 0
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#endif
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/*
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* Variable Attributes
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*/
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#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
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#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
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#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
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/*
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* EFI Device Path information
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*/
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#define EFI_DEV_HW 0x01
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#define EFI_DEV_PCI 1
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#define EFI_DEV_PCCARD 2
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#define EFI_DEV_MEM_MAPPED 3
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#define EFI_DEV_VENDOR 4
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#define EFI_DEV_CONTROLLER 5
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#define EFI_DEV_ACPI 0x02
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#define EFI_DEV_BASIC_ACPI 1
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#define EFI_DEV_EXPANDED_ACPI 2
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#define EFI_DEV_MSG 0x03
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#define EFI_DEV_MSG_ATAPI 1
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#define EFI_DEV_MSG_SCSI 2
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#define EFI_DEV_MSG_FC 3
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#define EFI_DEV_MSG_1394 4
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#define EFI_DEV_MSG_USB 5
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#define EFI_DEV_MSG_USB_CLASS 15
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#define EFI_DEV_MSG_I20 6
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#define EFI_DEV_MSG_MAC 11
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#define EFI_DEV_MSG_IPV4 12
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#define EFI_DEV_MSG_IPV6 13
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#define EFI_DEV_MSG_INFINIBAND 9
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#define EFI_DEV_MSG_UART 14
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#define EFI_DEV_MSG_VENDOR 10
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#define EFI_DEV_MEDIA 0x04
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#define EFI_DEV_MEDIA_HARD_DRIVE 1
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#define EFI_DEV_MEDIA_CDROM 2
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#define EFI_DEV_MEDIA_VENDOR 3
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#define EFI_DEV_MEDIA_FILE 4
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#define EFI_DEV_MEDIA_PROTOCOL 5
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#define EFI_DEV_BIOS_BOOT 0x05
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#define EFI_DEV_END_PATH 0x7F
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#define EFI_DEV_END_PATH2 0xFF
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#define EFI_DEV_END_INSTANCE 0x01
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#define EFI_DEV_END_ENTIRE 0xFF
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struct efi_generic_dev_path {
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u8 type;
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u8 sub_type;
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u16 length;
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} __attribute ((packed));
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#endif /* _LINUX_EFI_H */
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