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de1cd07906
Use SPRN_SPRG_SCRATCH2 as an alternative scratch register in the early part of DSI prolog in order to avoid clobbering SPRN_SPRG_SCRATCH0/1 used by other prologs. The 603 doesn't like a jump from DataLoadTLBMiss to the 10 nops that are now in the beginning of DSI exception as a result of the feature section. To workaround this, add a jump as alternative. It also avoids fetching 10 nops for nothing. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/f9f8df2a2be93568768ef1ac793639f7914cf103.1606285014.git.christophe.leroy@csgroup.eu
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.