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)
{
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;
__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.
*
}
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.
*/
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;
}
projects / linux-2.6-block.git / blobdiff