** Tags added: kernel-daily-bug -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-aws in Ubuntu. https://bugs.launchpad.net/bugs/2060992
Title: aws: Support hibernation on Graviton Status in linux-aws package in Ubuntu: Fix Released Status in linux-aws source package in Jammy: Fix Released Status in linux-aws source package in Mantic: Fix Released Status in linux-aws source package in Noble: Fix Released Bug description: SRU Justification: [Impact] This change contains two parts, the first is adding support for - KVM and guest support for the PSCI SYSTEM_OFF2 (hibernate) call And the second part is: - Guest kernel support for clean boot on demand For KVM and guest support for the PSCI SYSTEM_OFF2 (hibernate) call: PSCI v1.3 adds support for SYSTEM_OFF2 which is analogous to ACPI S4 state. This will allow hosting environments to determine that a guest is hibernated rather than just powered off, and ensure that they preserve the virtual environment appropriately to allow the guest to resume safely (or bump the hardware_signature in the FACS to trigger a clean reboot instead). For Guest kernel support for clean boot on demand: The FACS field in the ACPI table is optional, but can be used communicate the hardware_signature field. If this field changes on resuming from a hibernation a clean reboot should happen rather than the resume from hibernation. On hardware reduced platforms[0] this field may exist but it is not exposed currently. [Fix] The changes for KVM and guest support for the PSCI SYSTEM_OFF2 (hibernate) call come from: https://lore.kernel.org/lkml/20240312135958.727765-1-dw...@infradead.org The changes for Guest kernel support for clean boot on demand come from: https://lore.kernel.org/lkml/20240312134148.727454-1-dw...@infradead.org Latest patches have been picked from: - noble/mantic: https://git.infradead.org/users/dwmw2/linux.git/shortlog/refs/heads/psci-hibernate-6.8 - jammy: https://git.infradead.org/users/dwmw2/linux.git/shortlog/refs/heads/psci-hibernate-5.15 [Test Plan] AWS test. [Where problems could occur] If on hardware reduced platforms that incorrectly support/advertise the FACS field, hibernation may break if it returns a hardware signature that changes. [Other info] SF# 00383181 [0]: See Section 4.1 of the ACPI spec for info on hardware-reduced platforms. https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/04_ACPI_Hardware_Specification/ACPI_Hardware_Specification.html To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-aws/+bug/2060992/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
