Four changes:
- x86: work around two nasty cases where a benign exception occurs while
another is being delivered. The endless stream of exceptions causes an
infinite loop in the processor, which not even NMIs or SMIs can interrupt;
in the virt case, there is no possibility to exit to the host either.
- x86: support for Skylake per-guest TSC rate. Long supported by AMD,
the patches mostly move things from there to common arch/x86/kvm/ code.
- generic: remove local_irq_save/restore from the guest entry and exit
paths when context tracking is enabled. The patches are a few months
old, but we discussed them again at kernel summit. Andy will pick up
from here and, in 4.5, try to remove it from the user entry/exit paths.
- PPC: Two bug fixes, see merge commit 370289756becc for details.
Merge branch 'kvm-ppc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD
"Paolo,
I have two fixes for HV KVM which I would like to have included in
v4.4-rc1. The first one is a fix for a bug identified by Red Hat
which causes occasional guest crashes. The second one fixes a bug
which causes host stalls and timeouts under certain circumstances when
the host is configured for static 2-way micro-threading mode."
