Icenowy Zheng
a1190f5c99
The UEFI specification only defines A/C/I/M/Zicsr/Zifencei as mandatory extensions in boot services. However, on systems with everything built with F/D support, its difficult to disable F/D without changing a toolchain. In addition, both EDK2 and U-Boot enable F/D on boot, although they neither enable nor disable V. EDK2 comments even claim the enablement of FPU is "to be compliant with UEFI spec" despite the spec requires dynamic detection before using F/D. Add corresponding -march flags to prevent systemd-boot from using other extensions on RISC-V, and a comment for the temporary enablement of F/D. Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
System and Service Manager
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