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Diffstat (limited to 'drivers/acpi/osl.c')
-rw-r--r--drivers/acpi/osl.c505
1 files changed, 2 insertions, 503 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 814d5f83b75e..b108f1358a32 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -56,10 +56,6 @@ struct acpi_os_dpc {
struct work_struct work;
};
-#ifdef CONFIG_ACPI_CUSTOM_DSDT
-#include CONFIG_ACPI_CUSTOM_DSDT_FILE
-#endif
-
#ifdef ENABLE_DEBUGGER
#include <linux/kdb.h>
@@ -96,72 +92,6 @@ struct acpi_ioremap {
static LIST_HEAD(acpi_ioremaps);
static DEFINE_MUTEX(acpi_ioremap_lock);
-static void __init acpi_osi_setup_late(void);
-
-/*
- * The story of _OSI(Linux)
- *
- * From pre-history through Linux-2.6.22,
- * Linux responded TRUE upon a BIOS OSI(Linux) query.
- *
- * Unfortunately, reference BIOS writers got wind of this
- * and put OSI(Linux) in their example code, quickly exposing
- * this string as ill-conceived and opening the door to
- * an un-bounded number of BIOS incompatibilities.
- *
- * For example, OSI(Linux) was used on resume to re-POST a
- * video card on one system, because Linux at that time
- * could not do a speedy restore in its native driver.
- * But then upon gaining quick native restore capability,
- * Linux has no way to tell the BIOS to skip the time-consuming
- * POST -- putting Linux at a permanent performance disadvantage.
- * On another system, the BIOS writer used OSI(Linux)
- * to infer native OS support for IPMI! On other systems,
- * OSI(Linux) simply got in the way of Linux claiming to
- * be compatible with other operating systems, exposing
- * BIOS issues such as skipped device initialization.
- *
- * So "Linux" turned out to be a really poor chose of
- * OSI string, and from Linux-2.6.23 onward we respond FALSE.
- *
- * BIOS writers should NOT query _OSI(Linux) on future systems.
- * Linux will complain on the console when it sees it, and return FALSE.
- * To get Linux to return TRUE for your system will require
- * a kernel source update to add a DMI entry,
- * or boot with "acpi_osi=Linux"
- */
-
-static struct osi_linux {
- unsigned int enable:1;
- unsigned int dmi:1;
- unsigned int cmdline:1;
- unsigned int default_disabling:1;
-} osi_linux = {0, 0, 0, 0};
-
-static u32 acpi_osi_handler(acpi_string interface, u32 supported)
-{
- if (!strcmp("Linux", interface)) {
-
- printk_once(KERN_NOTICE FW_BUG PREFIX
- "BIOS _OSI(Linux) query %s%s\n",
- osi_linux.enable ? "honored" : "ignored",
- osi_linux.cmdline ? " via cmdline" :
- osi_linux.dmi ? " via DMI" : "");
- }
-
- if (!strcmp("Darwin", interface)) {
- /*
- * Apple firmware will behave poorly if it receives positive
- * answers to "Darwin" and any other OS. Respond positively
- * to Darwin and then disable all other vendor strings.
- */
- acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
- supported = ACPI_UINT32_MAX;
- }
-
- return supported;
-}
-
static void __init acpi_request_region (struct acpi_generic_address *gas,
unsigned int length, char *desc)
{
@@ -582,7 +512,7 @@ static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
acpi_status
acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
- char **new_val)
+ acpi_string *new_val)
{
if (!init_val || !new_val)
return AE_BAD_PARAMETER;
@@ -602,280 +532,6 @@ acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
return AE_OK;
}
-static void acpi_table_taint(struct acpi_table_header *table)
-{
- pr_warn(PREFIX
- "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
- table->signature, table->oem_table_id);
- add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
-}
-
-#ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
-#include <linux/earlycpio.h>
-#include <linux/memblock.h>
-
-static u64 acpi_tables_addr;
-static int all_tables_size;
-
-/* Copied from acpica/tbutils.c:acpi_tb_checksum() */
-static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
-{
- u8 sum = 0;
- u8 *end = buffer + length;
-
- while (buffer < end)
- sum = (u8) (sum + *(buffer++));
- return sum;
-}
-
-/* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
-static const char * const table_sigs[] = {
- ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
- ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
- ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
- ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
- ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
- ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
- ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
- ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
- ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
-
-#define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
-
-#define ACPI_OVERRIDE_TABLES 64
-static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES];
-static DECLARE_BITMAP(acpi_initrd_installed, ACPI_OVERRIDE_TABLES);
-
-#define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
-
-void __init acpi_initrd_override(void *data, size_t size)
-{
- int sig, no, table_nr = 0, total_offset = 0;
- long offset = 0;
- struct acpi_table_header *table;
- char cpio_path[32] = "kernel/firmware/acpi/";
- struct cpio_data file;
-
- if (data == NULL || size == 0)
- return;
-
- for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) {
- file = find_cpio_data(cpio_path, data, size, &offset);
- if (!file.data)
- break;
-
- data += offset;
- size -= offset;
-
- if (file.size < sizeof(struct acpi_table_header)) {
- pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
- cpio_path, file.name);
- continue;
- }
-
- table = file.data;
-
- for (sig = 0; table_sigs[sig]; sig++)
- if (!memcmp(table->signature, table_sigs[sig], 4))
- break;
-
- if (!table_sigs[sig]) {
- pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
- cpio_path, file.name);
- continue;
- }
- if (file.size != table->length) {
- pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
- cpio_path, file.name);
- continue;
- }
- if (acpi_table_checksum(file.data, table->length)) {
- pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
- cpio_path, file.name);
- continue;
- }
-
- pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
- table->signature, cpio_path, file.name, table->length);
-
- all_tables_size += table->length;
- acpi_initrd_files[table_nr].data = file.data;
- acpi_initrd_files[table_nr].size = file.size;
- table_nr++;
- }
- if (table_nr == 0)
- return;
-
- acpi_tables_addr =
- memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT,
- all_tables_size, PAGE_SIZE);
- if (!acpi_tables_addr) {
- WARN_ON(1);
- return;
- }
- /*
- * Only calling e820_add_reserve does not work and the
- * tables are invalid (memory got used) later.
- * memblock_reserve works as expected and the tables won't get modified.
- * But it's not enough on X86 because ioremap will
- * complain later (used by acpi_os_map_memory) that the pages
- * that should get mapped are not marked "reserved".
- * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
- * works fine.
- */
- memblock_reserve(acpi_tables_addr, all_tables_size);
- arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
-
- /*
- * early_ioremap only can remap 256k one time. If we map all
- * tables one time, we will hit the limit. Need to map chunks
- * one by one during copying the same as that in relocate_initrd().
- */
- for (no = 0; no < table_nr; no++) {
- unsigned char *src_p = acpi_initrd_files[no].data;
- phys_addr_t size = acpi_initrd_files[no].size;
- phys_addr_t dest_addr = acpi_tables_addr + total_offset;
- phys_addr_t slop, clen;
- char *dest_p;
-
- total_offset += size;
-
- while (size) {
- slop = dest_addr & ~PAGE_MASK;
- clen = size;
- if (clen > MAP_CHUNK_SIZE - slop)
- clen = MAP_CHUNK_SIZE - slop;
- dest_p = early_ioremap(dest_addr & PAGE_MASK,
- clen + slop);
- memcpy(dest_p + slop, src_p, clen);
- early_iounmap(dest_p, clen + slop);
- src_p += clen;
- dest_addr += clen;
- size -= clen;
- }
- }
-}
-
-acpi_status
-acpi_os_physical_table_override(struct acpi_table_header *existing_table,
- acpi_physical_address *address, u32 *length)
-{
- int table_offset = 0;
- int table_index = 0;
- struct acpi_table_header *table;
- u32 table_length;
-
- *length = 0;
- *address = 0;
- if (!acpi_tables_addr)
- return AE_OK;
-
- while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) {
- table = acpi_os_map_memory(acpi_tables_addr + table_offset,
- ACPI_HEADER_SIZE);
- if (table_offset + table->length > all_tables_size) {
- acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
- WARN_ON(1);
- return AE_OK;
- }
-
- table_length = table->length;
-
- /* Only override tables matched */
- if (test_bit(table_index, acpi_initrd_installed) ||
- memcmp(existing_table->signature, table->signature, 4) ||
- memcmp(table->oem_table_id, existing_table->oem_table_id,
- ACPI_OEM_TABLE_ID_SIZE)) {
- acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
- goto next_table;
- }
-
- *length = table_length;
- *address = acpi_tables_addr + table_offset;
- acpi_table_taint(existing_table);
- acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
- set_bit(table_index, acpi_initrd_installed);
- break;
-
-next_table:
- table_offset += table_length;
- table_index++;
- }
- return AE_OK;
-}
-
-void __init acpi_initrd_initialize_tables(void)
-{
- int table_offset = 0;
- int table_index = 0;
- u32 table_length;
- struct acpi_table_header *table;
-
- if (!acpi_tables_addr)
- return;
-
- while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) {
- table = acpi_os_map_memory(acpi_tables_addr + table_offset,
- ACPI_HEADER_SIZE);
- if (table_offset + table->length > all_tables_size) {
- acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
- WARN_ON(1);
- return;
- }
-
- table_length = table->length;
-
- /* Skip RSDT/XSDT which should only be used for override */
- if (test_bit(table_index, acpi_initrd_installed) ||
- ACPI_COMPARE_NAME(table->signature, ACPI_SIG_RSDT) ||
- ACPI_COMPARE_NAME(table->signature, ACPI_SIG_XSDT)) {
- acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
- goto next_table;
- }
-
- acpi_table_taint(table);
- acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
- acpi_install_table(acpi_tables_addr + table_offset, TRUE);
- set_bit(table_index, acpi_initrd_installed);
-next_table:
- table_offset += table_length;
- table_index++;
- }
-}
-#else
-acpi_status
-acpi_os_physical_table_override(struct acpi_table_header *existing_table,
- acpi_physical_address *address,
- u32 *table_length)
-{
- *table_length = 0;
- *address = 0;
- return AE_OK;
-}
-
-void __init acpi_initrd_initialize_tables(void)
-{
-}
-#endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
-
-acpi_status
-acpi_os_table_override(struct acpi_table_header *existing_table,
- struct acpi_table_header **new_table)
-{
- if (!existing_table || !new_table)
- return AE_BAD_PARAMETER;
-
- *new_table = NULL;
-
-#ifdef CONFIG_ACPI_CUSTOM_DSDT
- if (strncmp(existing_table->signature, "DSDT", 4) == 0)
- *new_table = (struct acpi_table_header *)AmlCode;
-#endif
- if (*new_table != NULL)
- acpi_table_taint(existing_table);
- return AE_OK;
-}
-
static irqreturn_t acpi_irq(int irq, void *dev_id)
{
u32 handled;
@@ -1717,156 +1373,6 @@ static int __init acpi_os_name_setup(char *str)
__setup("acpi_os_name=", acpi_os_name_setup);
-#define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
-#define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
-
-struct osi_setup_entry {
- char string[OSI_STRING_LENGTH_MAX];
- bool enable;
-};
-
-static struct osi_setup_entry
- osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
- {"Module Device", true},
- {"Processor Device", true},
- {"3.0 _SCP Extensions", true},
- {"Processor Aggregator Device", true},
-};
-
-void __init acpi_osi_setup(char *str)
-{
- struct osi_setup_entry *osi;
- bool enable = true;
- int i;
-
- if (!acpi_gbl_create_osi_method)
- return;
-
- if (str == NULL || *str == '\0') {
- printk(KERN_INFO PREFIX "_OSI method disabled\n");
- acpi_gbl_create_osi_method = FALSE;
- return;
- }
-
- if (*str == '!') {
- str++;
- if (*str == '\0') {
- osi_linux.default_disabling = 1;
- return;
- } else if (*str == '*') {
- acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS);
- for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
- osi = &osi_setup_entries[i];
- osi->enable = false;
- }
- return;
- }
- enable = false;
- }
-
- for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
- osi = &osi_setup_entries[i];
- if (!strcmp(osi->string, str)) {
- osi->enable = enable;
- break;
- } else if (osi->string[0] == '\0') {
- osi->enable = enable;
- strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
- break;
- }
- }
-}
-
-static void __init set_osi_linux(unsigned int enable)
-{
- if (osi_linux.enable != enable)
- osi_linux.enable = enable;
-
- if (osi_linux.enable)
- acpi_osi_setup("Linux");
- else
- acpi_osi_setup("!Linux");
-
- return;
-}
-
-static void __init acpi_cmdline_osi_linux(unsigned int enable)
-{
- osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
- osi_linux.dmi = 0;
- set_osi_linux(enable);
-
- return;
-}
-
-void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
-{
- printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
-
- if (enable == -1)
- return;
-
- osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
- set_osi_linux(enable);
-
- return;
-}
-
-/*
- * Modify the list of "OS Interfaces" reported to BIOS via _OSI
- *
- * empty string disables _OSI
- * string starting with '!' disables that string
- * otherwise string is added to list, augmenting built-in strings
- */
-static void __init acpi_osi_setup_late(void)
-{
- struct osi_setup_entry *osi;
- char *str;
- int i;
- acpi_status status;
-
- if (osi_linux.default_disabling) {
- status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
-
- if (ACPI_SUCCESS(status))
- printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n");
- }
-
- for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
- osi = &osi_setup_entries[i];
- str = osi->string;
-
- if (*str == '\0')
- break;
- if (osi->enable) {
- status = acpi_install_interface(str);
-
- if (ACPI_SUCCESS(status))
- printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
- } else {
- status = acpi_remove_interface(str);
-
- if (ACPI_SUCCESS(status))
- printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
- }
- }
-}
-
-static int __init osi_setup(char *str)
-{
- if (str && !strcmp("Linux", str))
- acpi_cmdline_osi_linux(1);
- else if (str && !strcmp("!Linux", str))
- acpi_cmdline_osi_linux(0);
- else
- acpi_osi_setup(str);
-
- return 1;
-}
-
-__setup("acpi_osi=", osi_setup);
-
/*
* Disable the auto-serialization of named objects creation methods.
*
@@ -1986,12 +1492,6 @@ int acpi_resources_are_enforced(void)
}
EXPORT_SYMBOL(acpi_resources_are_enforced);
-bool acpi_osi_is_win8(void)
-{
- return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
-}
-EXPORT_SYMBOL(acpi_osi_is_win8);
-
/*
* Deallocate the memory for a spinlock.
*/
@@ -2157,8 +1657,7 @@ acpi_status __init acpi_os_initialize1(void)
BUG_ON(!kacpid_wq);
BUG_ON(!kacpi_notify_wq);
BUG_ON(!kacpi_hotplug_wq);
- acpi_install_interface_handler(acpi_osi_handler);
- acpi_osi_setup_late();
+ acpi_osi_init();
return AE_OK;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.