collect configuration of mmio devices #968
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Firecracker pass the configuration of all mmio device by a Linux kernel parameter
This parameter is defined as followd:
virtio_mmio.device=
[VMMIO] Memory mapped virtio (platform) device.
<size>@<baseaddr>:<irq>[:<id>]
where:
<size> := size (can use standard suffixes like K, M and G)
<baseaddr> := physical base address
<irq> := interrupt number (as passed to request_irq())
<id> := (optional) platform device id
example:
virtio_mmio.device=1K@0x100b0000:48:7
Can be used multiple times for multiple devices.
This patch parse the command line and store the string
<size>@<baseaddr>:<irq>[:<id>] in a vector, which is part of CLI.
This PR based on preliminary work of @duanyu-yu
Co-authored-by: Yu Duan <yu_duan@yahoo.com>
Firecracker parse the linux argument virtio_mmio.device to the kernel, which specifies the mmio addresses for VirtIO devices. This patch uses these arguments to find the network interface.wq:
This feature is not required. If VIRTIO_NET_F_STATUS is not announce, the driver assumes that the link is always active. This behavior is conform to the VirtIO standard.
mkroening
approved these changes
Nov 9, 2023
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Firecracker pass the configuration of all mmio device by a Linux kernel parameter This parameter is defined as followd:
This patch parse the command line and store the string
<size>@<baseaddr>:<irq>[:<id>]in a vector, which is part of CLI. The vector is used to find the network device on a microVM.In addition, the network driver support devices, which doesn't support VIRTIO_NET_F_STATUS.
This PR based on preliminary work from @duanyu-yu