hvm: Remove VM genearation ID device and incr_generationid from build_info.

Microsoft have now published their VM generation ID specification at
https://www.microsoft.com/en-us/download/details.aspx?id=30707.
It differs from the original specification upon which I based my
implementation in several key areas. Particularly, it is no longer
an incrementing 64-bit counter and so this patch is to remove
the incr_generationid field from the build_info and also disable the
ACPI device before 4.2 is released.

I will follow up with further patches to implement the VM generation
ID to the new specification.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Committed-by: Keir Fraser <keir@xen.org>

1 files changed, 0 insertions, 25 deletions

diff --git a/tools/firmware/hvmloader/acpi/dsdt.asl b/tools/firmware/hvmloader/acpi/dsdt.asl
index bf44dd63c4..64896ce11d 100644
--- a/tools/firmware/hvmloader/acpi/dsdt.asl
+++ b/tools/firmware/hvmloader/acpi/dsdt.asl
@@ -396,31 +396,6 @@ DefinitionBlock ("DSDT.aml", "DSDT", 2, "Xen", "HVM", 0)
                         IO (Decode16, 0x0378, 0x0378, 0x08, 0x08)
                         IRQNoFlags () {7}
                     })
-                } 
-
-                Device(VGID) {
-                    Name(_HID, EisaID ("XEN0000"))
-                    Name(_UID, 0x00)
-                    Name(_CID, "VM_Gen_Counter")
-                    Name(_DDN, "VM_Gen_Counter")
-                    Method(_STA, 0, NotSerialized)
-                    {
-                        If(LEqual(\_SB.VGIA, 0x00000000)) {
-                            Return(0x00)
-                        } Else {
-                            Return(0x0F)
-                        }
-                    }
-                    Name(PKG, Package ()
-                    {
-                        0x00000000,
-                        0x00000000
-                    })
-                    Method(ADDR, 0, NotSerialized)
-                    {
-                        Store(\_SB.VGIA, Index(PKG, 0))
-                        Return(PKG)
-                    }
                 }
             }
         }