[kvm-devel] [PATCH 0/5] SVM CR8 optimization patches

[Joerg R. <joe...@am...>]

This patch series implements optimizations to the CR8 intercept handling in
SVM. With these patches applied CR8 reads are not intercepted anymore. The
writes to CR8 are only intercepted if the TPR masks interrupts. This
significantly reduces the number of total CR8 intercepts when running Windows
64 bit versions. Some quick numbers:

Boot and shudown of Vista 64: 

Without these patches: ~38.000.000 CR8 writes intercepted
With    these patches:     ~38.000 CR8 writes intercepted

diffstat:

 arch/x86/kvm/lapic.c |    1 +
 arch/x86/kvm/svm.c   |   68 ++++++++++++++++++++++++++++++++++++++++---------
 2 files changed, 56 insertions(+), 13 deletions(-)