KVM: MTRR: fix fixed MTRR segment look up

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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: f7bfb57b3e
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>

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Alexis Dambricourt 2015-12-14 15:39:34 +01:00 • committed by Paolo Bonzini

parent 6fd086214a

commit a7f2d78657

1 changed files with 1 additions and 1 deletions

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arch/x86/kvm/mtrr.c

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