From: Eugene Korenevsky <ekorenevsky@gmail.com>
Date: Thu, 11 Dec 2014 05:53:27 +0000 (+0300)
Subject: KVM: nVMX: Improve nested msr switch checking
X-Git-Tag: fixes-v4.0-rc1~113^2~65
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9ac033e6b6970c7061725fc6824b3933eb5a0e7;p=pandora-kernel.git

KVM: nVMX: Improve nested msr switch checking

This patch improve checks required by Intel Software Developer Manual.
 - SMM MSRs are not allowed.
 - microcode MSRs are not allowed.
 - check x2apic MSRs only when LAPIC is in x2apic mode.
 - MSR switch areas must be aligned to 16 bytes.
 - address of first and last byte in MSR switch areas should not set any bits
   beyond the processor's physical-address width.

Also it adds warning messages on failures during MSR switch. These messages
are useful for people who debug their VMMs in nVMX.

Signed-off-by: Eugene Korenevsky <ekorenevsky@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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