From: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue, 7 Jul 2015 12:38:13 +0000 (+0200)
Subject: KVM: x86: apply guest MTRR virtualization on host reserved pages
X-Git-Tag: omap-for-v4.3/fixes-merge-window~242^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fd717f11015f673487ffc826e59b2bad69d20fe5;p=pandora-kernel.git

KVM: x86: apply guest MTRR virtualization on host reserved pages

Currently guest MTRR is avoided if kvm_is_reserved_pfn returns true.
However, the guest could prefer a different page type than UC for
such pages. A good example is that pass-throughed VGA frame buffer is
not always UC as host expected.

This patch enables full use of virtual guest MTRRs.

Suggested-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Tested-by: Joerg Roedel <jroedel@suse.de> (on AMD)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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