motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-05 08:43:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

acpi: add hardware implementation for memory hot unplug

Browse source 
- implements QEMU hardware part of memory hot unplug protocol
  described at "docs/spec/acpi_mem_hotplug.txt"
- handles memory remove notification event
- handles device eject notification

Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhu Guihua 2015-04-27 16:47:21 +08:00 • committed by Michael S. Tsirkin
parent 660e8ec700
commit c06b2ffb02
8 changed files with 61 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

13
hw/i386/acpi-dsdt-mem-hotplug.dsl
View file

@ -29,6 +29,8 @@
External(MEMORY_SLOT_PROXIMITY, FieldUnitObj) // read only
External(MEMORY_SLOT_ENABLED, FieldUnitObj) // 1 if enabled, read only
External(MEMORY_SLOT_INSERT_EVENT, FieldUnitObj) // (read) 1 if has a insert event. (write) 1 to clear event
External(MEMORY_SLOT_REMOVE_EVENT, FieldUnitObj) // (read) 1 if has a remove event. (write) 1 to clear event
External(MEMORY_SLOT_EJECT, FieldUnitObj) // initiates device eject, write only
External(MEMORY_SLOT_SLECTOR, FieldUnitObj) // DIMM selector, write only
External(MEMORY_SLOT_OST_EVENT, FieldUnitObj) // _OST event code, write only
External(MEMORY_SLOT_OST_STATUS, FieldUnitObj) // _OST status code, write only
@ -55,8 +57,10 @@
If (LEqual(MEMORY_SLOT_INSERT_EVENT, One)) { // Memory device needs check
MEMORY_SLOT_NOTIFY_METHOD(Local0, 1)
Store(1, MEMORY_SLOT_INSERT_EVENT)
} Elseif (LEqual(MEMORY_SLOT_REMOVE_EVENT, One)) { // Ejection request
MEMORY_SLOT_NOTIFY_METHOD(Local0, 3)
Store(1, MEMORY_SLOT_REMOVE_EVENT)
}
// TODO: handle memory eject request
Add(Local0, One, Local0) // goto next DIMM
}
Release(MEMORY_SLOT_LOCK)
@ -156,5 +160,12 @@
Store(Arg2, MEMORY_SLOT_OST_STATUS)
Release(MEMORY_SLOT_LOCK)
}
Method(MEMORY_SLOT_EJECT_METHOD, 2) {
Acquire(MEMORY_SLOT_LOCK, 0xFFFF)
Store(ToInteger(Arg0), MEMORY_SLOT_SLECTOR) // select DIMM
Store(1, MEMORY_SLOT_EJECT)
Release(MEMORY_SLOT_LOCK)
}
} // Device()
} // Scope()