tree eb056ec459bc3f15b8b4ce1c9c5ef1b5b3abffc0
parent 6fd086214a32510b963d9662b034bfd16cfad2ba
author Alexis Dambricourt <alexis.dambricourt@gmail.com> 1450103974 +0100
committer Paolo Bonzini <pbonzini@redhat.com> 1450794517 +0100

KVM: MTRR: fix fixed MTRR segment look up

This fixes the slow-down of VM running with pci-passthrough, since some MTRR
range changed from MTRR_TYPE_WRBACK to MTRR_TYPE_UNCACHABLE.  Memory in the
0K-640K range was incorrectly treated as uncacheable.

Fixes: f7bfb57b3e89ff89c0da9f93dedab89f68d6ca27
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=107561
Cc: qemu-stable@nongnu.org
Signed-off-by: Alexis Dambricourt <alexis.dambricourt@gmail.com>
[Use correct BZ for "Fixes" annotation.  - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>