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6eb51f1a6a
The riscv,isa devicetree property appears not to be fully populated on some real-world systems. For example, the Sipeed Lichee Pi 4A (running the vendor U-Boot) reports itself as "rv64imafdcvsu", which does not include the "zicntr" extension even though the time CSR is present and functional. Ignore the riscv,isa property and rely solely on CSR testing to determine whether or not extensions are present. Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE README File Quick start guide: cd src make For any more detailed instructions, see http://ipxe.org