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2025-05-23Documentation: hyperv: Update VMBus doc with new features and infoMichael Kelley
Starting in the 6.15 kernel, VMBus interrupts are automatically assigned away from a CPU that is being taken offline. Add documentation describing this case. Also add details of Hyper-V behavior when the primary channel of a VMBus device is closed as the result of unbinding the device's driver. This behavior has not changed, but it was not previously documented. Signed-off-by: Michael Kelley <mhklinux@outlook.com> Link: https://lore.kernel.org/r/20250520044435.7734-1-mhklinux@outlook.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <20250520044435.7734-1-mhklinux@outlook.com>
2025-01-13Documentation: hyperv: Add overview of guest VM hibernationMichael Kelley
Add documentation on how hibernation works in a guest VM on Hyper-V. Describe how VMBus devices and the VMBus itself are hibernated and resumed, along with various limitations. Signed-off-by: Michael Kelley <mhklinux@outlook.com> Link: https://lore.kernel.org/r/20250113145645.1320942-1-mhklinux@outlook.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <20250113145645.1320942-1-mhklinux@outlook.com>
2024-06-24Documentation: hyperv: Add overview of Confidential Computing VM supportMichael Kelley
Add documentation topic for Confidential Computing (CoCo) VM support in Linux guests on Hyper-V. Signed-off-by: Michael Kelley <mhklinux@outlook.com> Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com> Link: https://lore.kernel.org/r/20240618165059.10174-1-mhklinux@outlook.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <20240618165059.10174-1-mhklinux@outlook.com>
2024-05-28Documentation: hyperv: Improve synic and interrupt handling descriptionMichael Kelley
Current documentation does not describe how Linux handles the synthetic interrupt controller (synic) that Hyper-V provides to guest VMs, nor how VMBus or timer interrupts are handled. Add text describing the synic and reorganize existing text to make this more clear. Signed-off-by: Michael Kelley <mhklinux@outlook.com> Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com> Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com> Link: https://lore.kernel.org/r/20240511133818.19649-2-mhklinux@outlook.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <20240511133818.19649-2-mhklinux@outlook.com>
2024-05-28Documentation: hyperv: Update spelling and fix typoMichael Kelley
Update spelling from "VMbus" to "VMBus" to match Hyper-V product documentation. Also correct typo: "SNP-SEV" should be "SEV-SNP". Signed-off-by: Michael Kelley <mhklinux@outlook.com> Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com> Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com> Link: https://lore.kernel.org/r/20240511133818.19649-1-mhklinux@outlook.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <20240511133818.19649-1-mhklinux@outlook.com>
2024-03-01Documentation: hyperv: Add overview of PCI pass-thru device supportMichael Kelley
Add documentation topic for PCI pass-thru devices in Linux guests on Hyper-V and for the associated PCI controller driver (pci-hyperv.c). Signed-off-by: Michael Kelley <mhklinux@outlook.com> Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com> Link: https://lore.kernel.org/r/20240222200710.305259-1-mhklinux@outlook.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <20240222200710.305259-1-mhklinux@outlook.com>
2023-08-18Documentation: Fix typosBjorn Helgaas
Fix typos in Documentation. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20230814212822.193684-4-helgaas@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-07-13Documentation: hyperv: Add overview of clocks and timersMichael Kelley
Add documentation topic for clocks and timers when running as a guest on Hyper-V. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/1657561704-12631-4-git-send-email-mikelley@microsoft.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-07-13Documentation: hyperv: Add overview of VMbusMichael Kelley
Add documentation topic for using VMbus when running as a guest on Hyper-V. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/1657561704-12631-3-git-send-email-mikelley@microsoft.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-07-13Documentation: hyperv: Add overview of Hyper-V enlightenmentsMichael Kelley
Add an initial documentation topic for Linux enlightenments to run as a guest on Microsoft's Hyper-V hypervisor, linked under the "virt" documentation area. Update the virt doc index.rst and the MAINTAINERS file. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/1657561704-12631-2-git-send-email-mikelley@microsoft.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>