Matt Fleming sent a message to Linux Kernel/EFI lists with a set of UEFI-centric patches for Linux 4.9. Excerpting his message:
[…]There’s more work on refactoring EFI code to be architecture independent and the largest number of patches is spent cleaning up the EFI memory map code and allowing drivers on x86 to reserve EFI boot services for all of runtime. The architecture independent quest is going pretty well and it was only a couple of lines to get the esrt driver working on arm64. Other than that there’s some cleanups and fixes, and a merge of the out of tree EFI runtime driver from the FWTS project.
* Refactor the EFI memory map code into architecture neutral files and allow drivers to permanently reserve EFI boot services regions on x86, as well as ARM/arm64 – Matt Fleming
* Add ARM support for the EFI esrt driver – Ard Biesheuvel
* Make the EFI runtime services and efivar API interruptible by swapping spinlocks for semaphores – Sylvain Chouleur
* Provide the EFI identity mapping for kexec which allows kexec to work on SGI/UV platforms with requiring the “noefi” kernel command line parameter – Alex Thorlton
* Add debugfs node to dump EFI page tables on arm64 – Ard Biesheuvel
* Merge the EFI test driver being carried out of tree until now in the FWTS project – Ivan Hu
* Expand the list of flags for classifying EFI regions as “RAM” on arm64 so we align with the UEFI spec – Ard Biesheuvel
* Optimise out the EFI mixed mode if it’s unsupported (CONFIG_X86_32) or disabled (CONFIG_EFI_MIXED=n) and switch the early EFI boot services function table for direct calls, alleviating us from having to maintain the custom function table – Lukas Wunner
* Miscellaneous cleanups and fixes
[…]
git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git tags/efi-next
Firmware Security 