a50623fb57
The treclaim. emulation needs to record failure status in the TEXASR
register if the transaction had not previously failed. However, the
current code first does kvmppc_save_tm_pr() (which does a treclaim.
itself) and then checks the failure summary bit in TEXASR after that.
Since treclaim. itself causes transaction failure, the FS bit is
always set, so we were never updating TEXASR with the failure cause
supplied by the guest as the RA parameter to the treclaim. instruction.
This caused the tm-unavailable test in tools/testing/selftests/powerpc/tm
to fail.
To fix this, we need to read TEXASR before calling kvmppc_save_tm_pr(),
and base the final value of TEXASR on that value.
Fixes: 03c81682a90b ("KVM: PPC: Book3S PR: Add emulation for treclaim.")
Reviewed-by: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.