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The seed CSR defined by the Zkr extension is accessible only in M-mode by default. Older versions of OpenSBI (prior to version 1.4) do not set mseccfg.sseed, with the result that attempts to access the seed CSR from S-mode will raise an illegal instruction exception. Add a facility for testing the accessibility of arbitrary CSRs, and use it to check that the seed CSR is accessible before reporting the seed CSR entropy source as being functional. 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