8edd56735b
Make vhost-user-blk backwards compatible when migrating from older VMs
running with modern features turned off, the same way it was done for
virtio-blk in 20764be042 ("virtio-blk: set config size depending on the features enabled")
It's currently impossible to migrate from an older VM with
vhost-user-blk (with disable-legacy=off) because of errors like this:
qemu-system-x86_64: get_pci_config_device: Bad config data: i=0x10 read: 41 device: 1 cmask: ff wmask: 80 w1cmask:0
qemu-system-x86_64: Failed to load PCIDevice:config
qemu-system-x86_64: Failed to load virtio-blk:virtio
qemu-system-x86_64: error while loading state for instance 0x0 of device '0000:00:05.0:00.0:02.0/virtio-blk'
qemu-system-x86_64: load of migration failed: Invalid argument
This is caused by the newer (destination) VM requiring a bigger BAR0
alignment because it has to cover a bigger configuration space, which
isn't actually needed since those additional config fields are not
active (write-zeroes/discard).
Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <20220906073111.353245-6-d-tatianin@yandex-team.ru>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
23 lines
1.1 KiB
Meson
23 lines
1.1 KiB
Meson
softmmu_ss.add(files(
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'block.c',
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'cdrom.c',
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'hd-geometry.c'
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))
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softmmu_ss.add(when: 'CONFIG_ECC', if_true: files('ecc.c'))
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softmmu_ss.add(when: 'CONFIG_FDC', if_true: files('fdc.c'))
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softmmu_ss.add(when: 'CONFIG_FDC_ISA', if_true: files('fdc-isa.c'))
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softmmu_ss.add(when: 'CONFIG_FDC_SYSBUS', if_true: files('fdc-sysbus.c'))
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softmmu_ss.add(when: 'CONFIG_NAND', if_true: files('nand.c'))
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softmmu_ss.add(when: 'CONFIG_ONENAND', if_true: files('onenand.c'))
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softmmu_ss.add(when: 'CONFIG_PFLASH_CFI01', if_true: files('pflash_cfi01.c'))
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softmmu_ss.add(when: 'CONFIG_PFLASH_CFI02', if_true: files('pflash_cfi02.c'))
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softmmu_ss.add(when: 'CONFIG_SSI_M25P80', if_true: files('m25p80.c'))
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softmmu_ss.add(when: 'CONFIG_SWIM', if_true: files('swim.c'))
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softmmu_ss.add(when: 'CONFIG_XEN', if_true: files('xen-block.c'))
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softmmu_ss.add(when: 'CONFIG_TC58128', if_true: files('tc58128.c'))
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specific_ss.add(when: 'CONFIG_VIRTIO_BLK', if_true: files('virtio-blk.c', 'virtio-blk-common.c'))
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specific_ss.add(when: 'CONFIG_VHOST_USER_BLK', if_true: files('vhost-user-blk.c', 'virtio-blk-common.c'))
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subdir('dataplane')
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