[RESEND,v1,13/13] pc, acpi bios: Add memory hot unplug interface.

From: Hu Tao <hutao@cn.fujitsu.com>

This patch implements MEMORY_SLOT_EJECT_METHOD according to ACPI spec.

Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
---
 hw/i386/acpi-dsdt-mem-hotplug.dsl | 11 ++++++++++-
 hw/i386/ssdt-mem.dsl              |  5 +++++
 include/hw/acpi/pc-hotplug.h      |  2 ++
 3 files changed, 17 insertions(+), 1 deletion(-)

On Thu, 8 Jan 2015 09:06:20 +0800
Tang Chen <tangchen@cn.fujitsu.com> wrote:

> From: Hu Tao <hutao@cn.fujitsu.com>
> 
> This patch implements MEMORY_SLOT_EJECT_METHOD according to ACPI spec.
squash this patch in previous one

> 
> Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
> Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
> ---
>  hw/i386/acpi-dsdt-mem-hotplug.dsl | 11 ++++++++++-
>  hw/i386/ssdt-mem.dsl              |  5 +++++
>  include/hw/acpi/pc-hotplug.h      |  2 ++
>  3 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/i386/acpi-dsdt-mem-hotplug.dsl b/hw/i386/acpi-dsdt-mem-hotplug.dsl
> index 2a36c47..2a35534 100644
> --- a/hw/i386/acpi-dsdt-mem-hotplug.dsl
> +++ b/hw/i386/acpi-dsdt-mem-hotplug.dsl
> @@ -50,6 +50,7 @@
>                  Offset(20),
>                  MEMORY_SLOT_ENABLED,  1, // 1 if enabled, read only
>                  MEMORY_SLOT_INSERT_EVENT, 1, // (read) 1 if has a insert event. (write) 1 to clear event
> +                MEMORY_SLOT_REMOVE_EVENT, 1, // 1 if DIMM has a remove request, read only
it's not just remove event, you write into it to make eject,
so update it to match MEMORY_SLOT_INSERT_EVENT description with what happens
on write.

>              }
>  
>              Mutex (MEMORY_SLOT_LOCK, 0)
> @@ -71,8 +72,9 @@
>                      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)
>                      }
> -                    // TODO: handle memory eject request
>                      Add(Local0, One, Local0) // goto next DIMM
>                  }
>                  Release(MEMORY_SLOT_LOCK)
> @@ -172,5 +174,12 @@
>                  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(One, MEMORY_SLOT_REMOVE_EVENT)
> +                Release(MEMORY_SLOT_LOCK)
> +            }
>          } // Device()
>      } // Scope()
> diff --git a/hw/i386/ssdt-mem.dsl b/hw/i386/ssdt-mem.dsl
> index 22ff5dd..1416639 100644
> --- a/hw/i386/ssdt-mem.dsl
> +++ b/hw/i386/ssdt-mem.dsl
> @@ -43,6 +43,7 @@ DefinitionBlock ("ssdt-mem.aml", "SSDT", 0x02, "BXPC", "CSSDT", 0x1)
>      External(\_SB.PCI0.MEMORY_HOTPLUG_DEVICE.MEMORY_SLOT_STATUS_METHOD, MethodObj)
>      External(\_SB.PCI0.MEMORY_HOTPLUG_DEVICE.MEMORY_SLOT_OST_METHOD, MethodObj)
>      External(\_SB.PCI0.MEMORY_HOTPLUG_DEVICE.MEMORY_SLOT_PROXIMITY_METHOD, MethodObj)
> +    External(\_SB.PCI0.MEMORY_HOTPLUG_DEVICE.MEMORY_SLOT_EJECT_METHOD, MethodObj)
>  
>      Scope(\_SB) {
>  /*  v------------------ DO NOT EDIT ------------------v */
> @@ -72,6 +73,10 @@ DefinitionBlock ("ssdt-mem.aml", "SSDT", 0x02, "BXPC", "CSSDT", 0x1)
>              Method(_OST, 3) {
>                  \_SB.PCI0.MEMORY_HOTPLUG_DEVICE.MEMORY_SLOT_OST_METHOD(_UID, Arg0, Arg1, Arg2)
>              }
> +
> +            Method(_EJ0, 1) {
> +                \_SB.PCI0.MEMORY_HOTPLUG_DEVICE.MEMORY_SLOT_EJECT_METHOD(_UID, Arg0)
> +            }
>          }
>      }
>  }
> diff --git a/include/hw/acpi/pc-hotplug.h b/include/hw/acpi/pc-hotplug.h
> index b9db295..b61b6ea 100644
> --- a/include/hw/acpi/pc-hotplug.h
> +++ b/include/hw/acpi/pc-hotplug.h
> @@ -42,6 +42,7 @@
>  #define MEMORY_SLOT_PROXIMITY        MPX
>  #define MEMORY_SLOT_ENABLED          MES
>  #define MEMORY_SLOT_INSERT_EVENT     MINS
> +#define MEMORY_SLOT_REMOVE_EVENT     MRMV
>  #define MEMORY_SLOT_SLECTOR          MSEL
>  #define MEMORY_SLOT_OST_EVENT        MOEV
>  #define MEMORY_SLOT_OST_STATUS       MOSC
> @@ -50,6 +51,7 @@
>  #define MEMORY_SLOT_CRS_METHOD       MCRS
>  #define MEMORY_SLOT_OST_METHOD       MOST
>  #define MEMORY_SLOT_PROXIMITY_METHOD MPXM
> +#define MEMORY_SLOT_EJECT_METHOD     MEJ0
>  #define MEMORY_SLOT_NOTIFY_METHOD    MTFY
>  #define MEMORY_SLOT_SCAN_METHOD      MSCN
>