ab950e1acd
Commit 68ad28a4cdd4 ("KVM: PPC: Book3S HV: Fix radix guest SLB side
channel") changed the older guest entry path, with the side effect
that vcpu->arch.slb_max no longer gets cleared for a radix guest.
This means that a HPT guest which loads some SLB entries, switches to
radix mode, runs the guest using the old guest entry path (e.g.,
because the indep_threads_mode module parameter has been set to
false), and then switches back to HPT mode would now see the old SLB
entries being present, whereas previously it would have seen no SLB
entries.
To avoid changing guest-visible behaviour, this adds a store
instruction to clear vcpu->arch.slb_max for a radix guest using the
old guest entry path.
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.
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.