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| author | Toshi Kani <toshi.kani@hp.com> | 2012-05-23 20:25:19 -0600 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2012-06-04 01:09:14 -0400 |
| commit | 275c58d77062bbb85dbeb3843ba04f34aa50cf8e (patch) | |
| tree | d347bac51f1d7bb81a49b8abcd9961a4a997311f /include/acpi | |
| parent | f8f5701bdaf9134b1f90e5044a82c66324d2073f (diff) | |
| download | linux-275c58d77062bbb85dbeb3843ba04f34aa50cf8e.tar.gz linux-275c58d77062bbb85dbeb3843ba04f34aa50cf8e.tar.bz2 linux-275c58d77062bbb85dbeb3843ba04f34aa50cf8e.zip | |
ACPI: Add an interface to evaluate _OST
Added acpi_evaluate_hotplug_opt(). All ACPI hotplug handlers must call
this function when evaluating _OST for hotplug operations. If the
platform does not support _OST, this function returns AE_NOT_FOUND and
has no effect on the platform.
ACPI_HOTPLUG_OST is defined when all relevant ACPI hotplug operations,
such as CPU, memory and container hotplug, are enabled. This assures
consistent behavior among the hotplug operations with regarding the
_OST support. When ACPI_HOTPLUG_OST is not defined, this function is
a no-op.
ACPI PCI hotplug is not enhanced to support _OST at this time since it
is a legacy method being replaced by PCIe native hotplug. _OST support
for ACPI PCI hotplug may be added in future if necessary.
Some platforms may require the OS to support _OST in order to support
ACPI hotplug operations. For example, if a platform has the management
console where user can request a hotplug operation from, this _OST
support would be required for the management console to show the result
of the hotplug request to user.
Added macro definitions of _OST source events and status codes.
Also renamed OSC_SB_CPUHP_OST_SUPPORT to OSC_SB_HOTPLUG_OST_SUPPORT
since this _OSC bit is not specific to CPU hotplug. This bit is
defined in Table 6-147 of ACPI 5.0 as follows.
Bits: 3
Field Name: Insertion / Ejection _OST Processing Support
Definition: This bit is set if OSPM will evaluate the _OST
object defined under a device when processing
insertion and ejection source event codes.
Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/acpi_bus.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index b0d62820ada1..1139f3a01209 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -50,6 +50,9 @@ acpi_evaluate_reference(acpi_handle handle, acpi_string pathname, struct acpi_object_list *arguments, struct acpi_handle_list *list); +acpi_status +acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event, + u32 status_code, struct acpi_buffer *status_buf); struct acpi_pld { unsigned int revision:7; /* 0 */ |