Host and Guest Suspend Under Xen - S3 and S0ix
summary
Work integrates Linux kernel patches, QEMU changes and a Dom0 PCH shim into Qubes OS to get modern laptop sleep (S0ix) working with device passthrough. Implementation adds MSR access for residency debugging, switches Linux freeze→suspend paths for proper device callbacks, and makes PM config opt‑in; tests on five‑six Intel machines hit about 90% CPU C‑state residency compared with native but show remaining failures around PCI passthrough, Thunderbolt hotplug and a noisy CPU power driver.
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chapters (6)
- 0:00Host and guest suspend
- 3:24PCI pass-through issues
- 8:38Implementing S0 suspend
- 17:12Qubes-specific configurations
- 21:06Status and future outlook
- 24:06Q&A and technical discussion
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