[Skiboot] [PATCH 1/1] Disable protected execution facility

Oliver O'Halloran oohall at gmail.com
Fri Jun 5 16:53:02 AEST 2020

On Thu, Feb 6, 2020 at 7:48 AM Ryan Grimm <grimm at linux.ibm.com> wrote:
> This patch disables Protected Execution Faciltiy (PEF).
> This software procedure is needed for the lab because Cronus will be
> configured to bring the machine up with PEF on.  Hostboot has a similar
> procedure for running with PEF off.
> Skiboot can run with PEF on but the kernel cannot; the kernel will take
> a machine check when trying to write a protected resource, such as the
> So, use this until we have an ultravisor, or if we want to use BML with
> Cronus without UV = 1.
> Signed-off-by: Ryan Grimm <grimm at linux.ibm.com>

Thanks, merged as 37a369bbcb5a3f37de3affb77fc774375b83783e with a
small fix that replaces the urfid instruction with a macro to make it
build on older toolchains and LLVM.


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