lib: emulate Hyper-V enlightenment stack #849
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gjcolombo
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Feb 5, 2025
crates/propolis-api-types/src/instance_spec/components/board.rs
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hawkw
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Feb 5, 2025
crates/propolis-api-types/src/instance_spec/components/board.rs
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iximeow
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pfmooney
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Thanks for addressing the review feedback, the new changes look good! |
pfmooney
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Add the beginnings of a Hyper-V enlightenment stack to complement the bhyve enlightenment stack. This change aims to provide the absolute minimum functionality needed for a hypervisor to claim to expose a Hyper-V-compatible guest-hypervisor interface. These minimum requirements are described in the doc comments throughout this change.
Add PHD tests that boot VMs with the Hyper-V enlightenment stack enabled and (if the guest supports it) that try to query the hypervisor interface from within the guest.
Add a simple
propolis-clioption to enable the Hyper-V stack. Once the stack has some actual features, this may be better expressed as a table in thepropolis-config-tomlcrate, but this gives users a quick and easy way to enable the new interface.Tests: PHD with Debian 11, Ubuntu 22.04, Alpine, and Windows Server 2022 guests; repeated the Debian 11 and WS2022 runs with the Hyper-V enlightenment stack enabled by default for all PHD VMs. Tested with an ad hoc Debian 11 VM, verifying that it detected the Hyper-V hypervisor, that the guest wrote appropriate values to the Hyper-V MSRs, and (through mdb-bhyve) that the correct instruction sequence appears on the guest's hypercall page.
Related to #328.