Public bug reported: SRU Justification
[Impact] The kvm flavours currently do not enable CONFIG_DMI_SYSFS. This stops VMs using these kernels from being configurable using qemu or cloud- hypervisor's SMBIOS type 11 strings. This feature is supported and used widely by systemd: https://www.freedesktop.org/software/systemd/man/latest/smbios-type-11.html https://systemd.io/CREDENTIALS/ A user launching a VM using the linux-kvm kernel image is not able to specify SMBIOS strings to automatically configured userspace services and programs due to the lack of this kconfig. We make extensive use of these in systemd's upstream CI, which is running on Github Actions, which uses Jammy, so it would be great to have this kconfig enabled and backported. [Fix] Please consider enabling the following kconfigs: CONFIG_DMI_SYSFS These are already enabled in the 'main' kernel config, and in other distros. To verify this works, it is sufficient to check that the /sys/firmware/dmi/entries/ directory in sysfs is present: $ ls /sys/firmware/dmi/entries/ 0-0 126-1 126-4 126-8 130-0 133-0 136-0 140-2 15-0 18-0 21-1 221-1 24-0 7-1 8-2 8-6 1-0 126-10 126-5 126-9 131-0 134-0 14-0 140-3 16-0 19-0 219-0 221-2 3-0 7-2 8-3 9-0 12-0 126-2 126-6 127-0 131-1 135-0 140-0 140-4 17-0 2-0 22-0 221-3 4-0 8-0 8-4 9-1 126-0 126-3 126-7 13-0 132-0 135-1 140-1 14-1 17-1 21-0 221-0 222-0 7-0 8-1 8-5 Without this kconfig, the directory won't be there. Once enabled, it will be there. [Regression Potential] Enabling a new DMI option could affect the DMI subsystem in unforeseen ways. ** Affects: linux-kvm (Ubuntu) Importance: Undecided Status: New ** Affects: linux-kvm (Ubuntu Jammy) Importance: Undecided Status: New ** Affects: linux-kvm (Ubuntu Mantic) Importance: Undecided Status: New ** Affects: linux-kvm (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux-kvm (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux-kvm (Ubuntu Jammy) Importance: Undecided Status: New ** Also affects: linux-kvm (Ubuntu Mantic) Importance: Undecided Status: New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-kvm in Ubuntu. https://bugs.launchpad.net/bugs/2045561 Title: linux-kvm: please enable CONFIG_DMI_SYSFS for SMBIOS support Status in linux-kvm package in Ubuntu: New Status in linux-kvm source package in Jammy: New Status in linux-kvm source package in Mantic: New Status in linux-kvm source package in Noble: New Bug description: SRU Justification [Impact] The kvm flavours currently do not enable CONFIG_DMI_SYSFS. This stops VMs using these kernels from being configurable using qemu or cloud- hypervisor's SMBIOS type 11 strings. This feature is supported and used widely by systemd: https://www.freedesktop.org/software/systemd/man/latest/smbios-type-11.html https://systemd.io/CREDENTIALS/ A user launching a VM using the linux-kvm kernel image is not able to specify SMBIOS strings to automatically configured userspace services and programs due to the lack of this kconfig. We make extensive use of these in systemd's upstream CI, which is running on Github Actions, which uses Jammy, so it would be great to have this kconfig enabled and backported. [Fix] Please consider enabling the following kconfigs: CONFIG_DMI_SYSFS These are already enabled in the 'main' kernel config, and in other distros. To verify this works, it is sufficient to check that the /sys/firmware/dmi/entries/ directory in sysfs is present: $ ls /sys/firmware/dmi/entries/ 0-0 126-1 126-4 126-8 130-0 133-0 136-0 140-2 15-0 18-0 21-1 221-1 24-0 7-1 8-2 8-6 1-0 126-10 126-5 126-9 131-0 134-0 14-0 140-3 16-0 19-0 219-0 221-2 3-0 7-2 8-3 9-0 12-0 126-2 126-6 127-0 131-1 135-0 140-0 140-4 17-0 2-0 22-0 221-3 4-0 8-0 8-4 9-1 126-0 126-3 126-7 13-0 132-0 135-1 140-1 14-1 17-1 21-0 221-0 222-0 7-0 8-1 8-5 Without this kconfig, the directory won't be there. Once enabled, it will be there. [Regression Potential] Enabling a new DMI option could affect the DMI subsystem in unforeseen ways. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-kvm/+bug/2045561/+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
