[virtio-pmem] Implementation #5463
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## main #5463 +/- ##
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Status: Awaiting review
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Manciukic
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- we should update
docs/device-api.md. - changelog entry
- any performance tests? we could check how fast we can read or write the entire pmem or maybe we can integrate it with the block tests using fio
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bchalios
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Went half way through. Here's an initial set of comments
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msync is used by virtio-pmem device to trigger sync of mmaped file content to the underlying file. Signed-off-by: Egor Lazarchuk <[email protected]>
Add implementations of device, event handling, metrics. Add device config and builder types for API use. Signed-off-by: Egor Lazarchuk <[email protected]>
Update VmResources type with virtio-pmem configuration field to allow virtio-pmem devices be configured through config files and later through API calls. Signed-off-by: Egor Lazarchuk <[email protected]>
Both virtio-block and virtio-pmem can act as root devices for a VM. Add a check to prevent specifing more than 1 root device for a VM. Signed-off-by: Egor Lazarchuk <[email protected]>
Add /pmem/id PUT request for virtio-pmem configuration. Add corresponding metrics. Signed-off-by: Egor Lazarchuk <[email protected]>
Virtio-pmem devices need to allocate a memory region in guest physical memory. The safe place to do this is past 64bit MMIO region. Signed-off-by: Egor Lazarchuk <[email protected]>
Add a counter for KVM slot ids into VmCommon struct. This is done because virtio-pmem device needs to obtain it's KVM slot id independently from number of slots in GuestMemoryMmap. Signed-off-by: Egor Lazarchuk <[email protected]>
Add methods to attach virtio-pmem devices to Vmm. Add methods to create KVM memory slot for virtio-pmem devices. Signed-off-by: Egor Lazarchuk <[email protected]>
Add logic to store and restore virtio-pmem device information in a snapshot. Signed-off-by: Egor Lazarchuk <[email protected]>
Add functional and API tests for virtio-pmem device and its configuration fields Signed-off-by: Egor Lazarchuk <[email protected]>
Expose virtio-pmem metrics in the logger, so they are exported in metrics.json. Update integration tests to expect new metrics. Signed-off-by: Egor Lazarchuk <[email protected]>
Add description of pmem APIs in swagger file and device-api.md Signed-off-by: Egor Lazarchuk <[email protected]>
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just 2 more typos, sorry if I missed them before!
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Add new document about virtio-pmem configuration and usage. Signed-off-by: Egor Lazarchuk <[email protected]>
Add a note about addition of virtio-pmem device. Signed-off-by: Egor Lazarchuk <[email protected]>
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Changes
Add
virtio-pmemdevice support.Closes #5448
License Acceptance
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CONTRIBUTING.md.PR Checklist
tools/devtool checkbuild --allto verify that the PR passesbuild checks on all supported architectures.
tools/devtool checkstyleto verify that the PR passes theautomated style checks.
how they are solving the problem in a clear and encompassing way.
in the PR.
CHANGELOG.md.Runbook for Firecracker API changes.
integration tests.
TODO.rust-vmm.