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6b4495401b
We changed link status register in pci express endpoint capability over time. Specifically, commitb2101eae63("pcie: Set the "link active" in the link status register") set data link layer link active bit in this register without adding compatibility to old machine types. When migrating from qemu 2.3 and older this affects xhci devices which under machine type 2.0 and older have a pci express endpoint capability even if they are on a pci bus. Add compatibility flags to make this bit value match what it was under 2.3. Additionally, to avoid breaking migration from qemu 2.3 and up, suppress checking link status during migration: this seems sane since hardware can change link status at any time. https://bugzilla.redhat.com/show_bug.cgi?id=1352860 Reported-by: Gerd Hoffmann <kraxel@redhat.com> Fixes:b2101eae63("pcie: Set the "link active" in the link status register") Cc: qemu-stable@nongnu.org Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
#ifndef HW_COMPAT_H
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#define HW_COMPAT_H
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#define HW_COMPAT_2_6 \
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{\
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.driver = "virtio-mmio",\
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.property = "format_transport_address",\
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.value = "off",\
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},
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#define HW_COMPAT_2_5 \
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{\
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.driver = "isa-fdc",\
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.property = "fallback",\
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.value = "144",\
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},{\
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.driver = "pvscsi",\
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.property = "x-old-pci-configuration",\
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.value = "on",\
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},{\
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.driver = "pvscsi",\
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.property = "x-disable-pcie",\
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.value = "on",\
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},\
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{\
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.driver = "vmxnet3",\
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.property = "x-old-msi-offsets",\
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.value = "on",\
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},{\
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.driver = "vmxnet3",\
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.property = "x-disable-pcie",\
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.value = "on",\
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},
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#define HW_COMPAT_2_4 \
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{\
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.driver = "virtio-blk-device",\
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.property = "scsi",\
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.value = "true",\
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},{\
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.driver = "e1000",\
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.property = "extra_mac_registers",\
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.value = "off",\
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},{\
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.driver = "virtio-pci",\
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.property = "x-disable-pcie",\
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.value = "on",\
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},{\
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.driver = "virtio-pci",\
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.property = "migrate-extra",\
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.value = "off",\
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},{\
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.driver = "fw_cfg_mem",\
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.property = "dma_enabled",\
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.value = "off",\
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},{\
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.driver = "fw_cfg_io",\
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.property = "dma_enabled",\
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.value = "off",\
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},
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#define HW_COMPAT_2_3 \
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{\
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.driver = "virtio-blk-pci",\
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.property = "any_layout",\
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.value = "off",\
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},{\
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.driver = "virtio-balloon-pci",\
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.property = "any_layout",\
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.value = "off",\
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},{\
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.driver = "virtio-serial-pci",\
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.property = "any_layout",\
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.value = "off",\
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},{\
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.driver = "virtio-9p-pci",\
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.property = "any_layout",\
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.value = "off",\
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},{\
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.driver = "virtio-rng-pci",\
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.property = "any_layout",\
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.value = "off",\
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},{\
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.driver = TYPE_PCI_DEVICE,\
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.property = "x-pcie-lnksta-dllla",\
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.value = "off",\
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},
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#define HW_COMPAT_2_2 \
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/* empty */
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#define HW_COMPAT_2_1 \
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{\
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.driver = "intel-hda",\
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.property = "old_msi_addr",\
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.value = "on",\
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},{\
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.driver = "VGA",\
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.property = "qemu-extended-regs",\
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.value = "off",\
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},{\
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.driver = "secondary-vga",\
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.property = "qemu-extended-regs",\
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.value = "off",\
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},{\
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.driver = "virtio-scsi-pci",\
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.property = "any_layout",\
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.value = "off",\
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},{\
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.driver = "usb-mouse",\
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.property = "usb_version",\
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.value = stringify(1),\
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},{\
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.driver = "usb-kbd",\
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.property = "usb_version",\
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.value = stringify(1),\
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},{\
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.driver = "virtio-pci",\
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.property = "virtio-pci-bus-master-bug-migration",\
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.value = "on",\
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},
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#endif /* HW_COMPAT_H */
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