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Michael Brown 19f44d2998 [riscv] Check if seed CSR is accessible from S-mode
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>
2024-10-28 23:07:14 +00:00
.github/workflows [ci] Update action versions to silence GitHub warnings 2024-03-07 23:25:35 +00:00
contrib [cloud] Add ability to delete old AMI images 2024-09-09 15:02:27 +01:00
src [riscv] Check if seed CSR is accessible from S-mode 2024-10-28 23:07:14 +00:00
COPYING [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.GPLv2 [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.UBDL [legal] Add support for the Unmodified Binary Distribution Licence 2015-03-02 12:07:14 +00:00
README [doc] Re-add README file 2010-05-28 00:03:47 +01:00

README

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org