ACPICA/ACPI: Add new host interfaces for _OSI support
Adds install/remove interfaces so that the host can dynamically
alter the global _OSI table. Also adds support for _OSI handlers.
Additional support: new debugger command (osi), and test support in
the acpiexec utility. Adds new file, utilities/utosi.c.
ACPICA bugzilla 836.
The Linux OSL _OSI code is also changed.
acpi_osi_setup can't call acpi_install/remove_interface because ACPICA
is not initialized yet at this early time.
So we just save the osi string in acpi_osi_setup and will handle it
later in a new function acpi_osi_setup_late.
http://www.acpica.org/bugzilla/show_bug.cgi?id=836
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index a351291..6652c49 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -96,7 +96,9 @@
static DEFINE_SPINLOCK(acpi_res_lock);
#define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
-static char osi_additional_string[OSI_STRING_LENGTH_MAX];
+static char osi_setup_string[OSI_STRING_LENGTH_MAX];
+
+static void __init acpi_osi_setup_late(void);
/*
* The story of _OSI(Linux)
@@ -138,6 +140,20 @@
unsigned int known:1;
} osi_linux = { 0, 0, 0, 0};
+static u32 acpi_osi_handler(acpi_string interface, u32 supported)
+{
+ if (!strcmp("Linux", interface)) {
+
+ printk(KERN_NOTICE PREFIX
+ "BIOS _OSI(Linux) query %s%s\n",
+ osi_linux.enable ? "honored" : "ignored",
+ osi_linux.cmdline ? " via cmdline" :
+ osi_linux.dmi ? " via DMI" : "");
+ }
+
+ return supported;
+}
+
static void __init acpi_request_region (struct acpi_generic_address *addr,
unsigned int length, char *desc)
{
@@ -198,6 +214,8 @@
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();
return AE_OK;
}
@@ -979,6 +997,12 @@
printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n",
enable ? "Add": "Delet");
}
+
+ if (osi_linux.enable)
+ acpi_osi_setup("Linux");
+ else
+ acpi_osi_setup("!Linux");
+
return;
}
@@ -1013,21 +1037,33 @@
* string starting with '!' disables that string
* otherwise string is added to list, augmenting built-in strings
*/
+static void __init acpi_osi_setup_late(void)
+{
+ char *str = osi_setup_string;
+
+ if (*str == '\0')
+ return;
+
+ if (!strcmp("!Linux", str)) {
+ acpi_cmdline_osi_linux(0); /* !enable */
+ } else if (*str == '!') {
+ if (acpi_remove_interface(++str) == AE_OK)
+ printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
+ } else if (!strcmp("Linux", str)) {
+ acpi_cmdline_osi_linux(1); /* enable */
+ } else {
+ if (acpi_install_interface(str) == AE_OK)
+ printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
+ }
+}
+
int __init acpi_osi_setup(char *str)
{
if (str == NULL || *str == '\0') {
printk(KERN_INFO PREFIX "_OSI method disabled\n");
acpi_gbl_create_osi_method = FALSE;
- } else if (!strcmp("!Linux", str)) {
- acpi_cmdline_osi_linux(0); /* !enable */
- } else if (*str == '!') {
- if (acpi_osi_invalidate(++str) == AE_OK)
- printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
- } else if (!strcmp("Linux", str)) {
- acpi_cmdline_osi_linux(1); /* enable */
- } else if (*osi_additional_string == '\0') {
- strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX);
- printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
+ } else {
+ strncpy(osi_setup_string, str, OSI_STRING_LENGTH_MAX);
}
return 1;
@@ -1284,38 +1320,6 @@
return (AE_OK);
}
-/******************************************************************************
- *
- * FUNCTION: acpi_os_validate_interface
- *
- * PARAMETERS: interface - Requested interface to be validated
- *
- * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise
- *
- * DESCRIPTION: Match an interface string to the interfaces supported by the
- * host. Strings originate from an AML call to the _OSI method.
- *
- *****************************************************************************/
-
-acpi_status
-acpi_os_validate_interface (char *interface)
-{
- if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX))
- return AE_OK;
- if (!strcmp("Linux", interface)) {
-
- printk(KERN_NOTICE PREFIX
- "BIOS _OSI(Linux) query %s%s\n",
- osi_linux.enable ? "honored" : "ignored",
- osi_linux.cmdline ? " via cmdline" :
- osi_linux.dmi ? " via DMI" : "");
-
- if (osi_linux.enable)
- return AE_OK;
- }
- return AE_SUPPORT;
-}
-
static inline int acpi_res_list_add(struct acpi_res_list *res)
{
struct acpi_res_list *res_list_elem;