[PATCH 0/4] KVM: x86: kvm_mwait_in_guest() cleanup and fixes

From: Radim KrÄmÃÅ
Date: Wed May 03 2017 - 15:38:18 EST

kvm_mwait_in_guest() was overcomplicated and also missed one AMD bug
that should prevent MWAIT pass through.

This series ignores errata that don't have any Linux bug defined;
I know of two minor (not affecting the host) Core 2 errata:
AG36. Split Locked Stores May not Trigger the Monitoring Hardware
AG106. A REP STOS/MOVS to a MONITOR/MWAIT Address Range May Prevent
Triggering of the Monitoring Hardware

None of them are really worthy of a new condition if Linux never hit
them ... we still have the OS X bug that Gabriel is hitting, but I'm ok
with the original approach that sacrificed it for "greater good".

Radim KrÄmÃÅ (4):
KVM: svm: prevent MWAIT in guest with erratum 400
KVM: x86: prevent MWAIT in guest with buggy MONITOR
KVM: x86: drop bogus MWAIT check
KVM: x86: simplify kvm_mwait_in_guest()

arch/x86/kvm/x86.h | 33 +++------------------------------
1 file changed, 3 insertions(+), 30 deletions(-)