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qemu/include/hw/compat.h
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

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#ifndef HW_COMPAT_H
#define HW_COMPAT_H
#define HW_COMPAT_2_10 \
/* empty */
#define HW_COMPAT_2_9 \
{\
.driver = "pci-bridge",\
.property = "shpc",\
.value = "off",\
},{\
.driver = "intel-iommu",\
.property = "pt",\
.value = "off",\
},{\
.driver = "virtio-net-device",\
.property = "x-mtu-bypass-backend",\
.value = "off",\
},{\
.driver = "pcie-root-port",\
.property = "x-migrate-msix",\
.value = "false",\
},
#define HW_COMPAT_2_8 \
{\
.driver = "fw_cfg_mem",\
.property = "x-file-slots",\
.value = stringify(0x10),\
},{\
.driver = "fw_cfg_io",\
.property = "x-file-slots",\
.value = stringify(0x10),\
},{\
.driver = "pflash_cfi01",\
.property = "old-multiple-chip-handling",\
.value = "on",\
},{\
.driver = "pci-bridge",\
.property = "shpc",\
.value = "on",\
},{\
.driver = TYPE_PCI_DEVICE,\
.property = "x-pcie-extcap-init",\
.value = "off",\
},{\
.driver = "virtio-pci",\
.property = "x-pcie-deverr-init",\
.value = "off",\
},{\
.driver = "virtio-pci",\
.property = "x-pcie-lnkctl-init",\
.value = "off",\
},{\
.driver = "virtio-pci",\
.property = "x-pcie-pm-init",\
.value = "off",\
},{\
.driver = "cirrus-vga",\
.property = "vgamem_mb",\
.value = "8",\
},{\
.driver = "isa-cirrus-vga",\
.property = "vgamem_mb",\
.value = "8",\
},
#define HW_COMPAT_2_7 \
{\
.driver = "virtio-pci",\
.property = "page-per-vq",\
.value = "on",\
},{\
.driver = "virtio-serial-device",\
.property = "emergency-write",\
.value = "off",\
},{\
.driver = "ioapic",\
.property = "version",\
.value = "0x11",\
},{\
.driver = "intel-iommu",\
.property = "x-buggy-eim",\
.value = "true",\
},{\
.driver = "virtio-pci",\
.property = "x-ignore-backend-features",\
.value = "on",\
},
#define HW_COMPAT_2_6 \
{\
.driver = "virtio-mmio",\
.property = "format_transport_address",\
.value = "off",\
},{\
.driver = "virtio-pci",\
.property = "disable-modern",\
.value = "on",\
},{\
.driver = "virtio-pci",\
.property = "disable-legacy",\
.value = "off",\
},
#define HW_COMPAT_2_5 \
{\
.driver = "isa-fdc",\
.property = "fallback",\
.value = "144",\
},{\
.driver = "pvscsi",\
.property = "x-old-pci-configuration",\
.value = "on",\
},{\
.driver = "pvscsi",\
.property = "x-disable-pcie",\
.value = "on",\
},\
{\
.driver = "vmxnet3",\
.property = "x-old-msi-offsets",\
.value = "on",\
},{\
.driver = "vmxnet3",\
.property = "x-disable-pcie",\
.value = "on",\
},
#define HW_COMPAT_2_4 \
{\
.driver = "virtio-blk-device",\
.property = "scsi",\
.value = "true",\
},{\
.driver = "e1000",\
.property = "extra_mac_registers",\
.value = "off",\
},{\
.driver = "virtio-pci",\
.property = "x-disable-pcie",\
.value = "on",\
},{\
.driver = "virtio-pci",\
.property = "migrate-extra",\
.value = "off",\
},{\
.driver = "fw_cfg_mem",\
.property = "dma_enabled",\
.value = "off",\
},{\
.driver = "fw_cfg_io",\
.property = "dma_enabled",\
.value = "off",\
},
#define HW_COMPAT_2_3 \
{\
.driver = "virtio-blk-pci",\
.property = "any_layout",\
.value = "off",\
},{\
.driver = "virtio-balloon-pci",\
.property = "any_layout",\
.value = "off",\
},{\
.driver = "virtio-serial-pci",\
.property = "any_layout",\
.value = "off",\
},{\
.driver = "virtio-9p-pci",\
.property = "any_layout",\
.value = "off",\
},{\
.driver = "virtio-rng-pci",\
.property = "any_layout",\
.value = "off",\
},{\
.driver = TYPE_PCI_DEVICE,\
.property = "x-pcie-lnksta-dllla",\
.value = "off",\
},{\
.driver = "migration",\
.property = "send-configuration",\
.value = "off",\
},{\
.driver = "migration",\
.property = "send-section-footer",\
.value = "off",\
},{\
.driver = "migration",\
.property = "store-global-state",\
.value = "off",\
},
#define HW_COMPAT_2_2 \
/* empty */
#define HW_COMPAT_2_1 \
{\
.driver = "intel-hda",\
.property = "old_msi_addr",\
.value = "on",\
},{\
.driver = "VGA",\
.property = "qemu-extended-regs",\
.value = "off",\
},{\
.driver = "secondary-vga",\
.property = "qemu-extended-regs",\
.value = "off",\
},{\
.driver = "virtio-scsi-pci",\
.property = "any_layout",\
.value = "off",\
},{\
.driver = "usb-mouse",\
.property = "usb_version",\
.value = stringify(1),\
},{\
.driver = "usb-kbd",\
.property = "usb_version",\
.value = stringify(1),\
},{\
.driver = "virtio-pci",\
.property = "virtio-pci-bus-master-bug-migration",\
.value = "on",\
},
#endif /* HW_COMPAT_H */
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