To date we've been unable to sign shim on aarch64 and hence are unable to provide a full secure-boot boot flow. The reason for this has been due to PE-COFF support in binutils to be able to build native PE-COFF binaries on aarch64 using the gnu toolchain. The shim builds today have basically been hand crafted and this has meant we've been unable to get them signed by MS. The lack of native PE-COFF support has now been resolved and landed upstream in binutils and getting this back ported will allow us to get that signed and complete secure-boot on aarch64. https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=b69c9d41e89498442cb5af5287f378b3583dd445
Feature added to: binutils-2.37-21.fc36 binutils-2.37-14.fc35
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This actually landed