qemu-e2k/include/hw/acpi
Marc-André Lureau c8389550de vmgenid: replace x-write-pointer-available hack
This compat property sole function is to prevent the device from being
instantiated. Instead of requiring an extra compat property, check if
fw_cfg has DMA enabled.

fw_cfg is a built-in device that is initialized very early by the
machine init code.  We have at least one other device that also
assumes fw_cfg_find() can be safely used on realize: pvpanic.

This has the additional benefit of handling other cases properly, like:

  $ qemu-system-x86_64 -device vmgenid -machine none
  qemu-system-x86_64: -device vmgenid: vmgenid requires DMA write support in fw_cfg, which this machine type does not provide
  $ qemu-system-x86_64 -device vmgenid -machine pc-i440fx-2.9 -global fw_cfg.dma_enabled=off
  qemu-system-x86_64: -device vmgenid: vmgenid requires DMA write support in fw_cfg, which this machine type does not provide
  $ qemu-system-x86_64 -device vmgenid -machine pc-i440fx-2.6 -global fw_cfg.dma_enabled=on
  [boots normally]

Suggested-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Ben Warren <ben@skyportsystems.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-09-08 16:15:17 +03:00
..
acpi_dev_interface.h ACPI: Add Virtual Machine Generation ID support 2017-03-02 07:14:27 +02:00
acpi-defs.h acpi-defs: clean up open brace usage 2017-05-10 22:04:23 +03:00
acpi.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
aml-build.h pci, virtio, vhost: fixes 2017-05-18 10:01:08 +01:00
bios-linker-loader.h vmgenid: replace x-write-pointer-available hack 2017-09-08 16:15:17 +03:00
cpu_hotplug.h Clean up header guards that don't match their file name 2016-07-12 16:19:16 +02:00
cpu.h pc: use new CPU hotplug interface since 2.7 machine type 2016-06-24 05:21:38 +03:00
ich9.h acpi: cpuhp: add CPU devices AML with _STA method 2016-06-24 05:21:01 +03:00
ipmi.h
memory_hotplug.h migration: Remove unneeded includes of migration/vmstate.h 2017-06-01 18:49:22 +02:00
pc-hotplug.h memhp: don't generate memory hotplug AML if it's not enabled/supported 2017-01-10 07:03:24 +02:00
pcihp.h migration: Remove unneeded includes of migration/vmstate.h 2017-06-01 18:49:22 +02:00
piix4.h
tco.h
tpm.h
vmgenid.h vmgenid: replace x-write-pointer-available hack 2017-09-08 16:15:17 +03:00