From: Avi Kivity <avi@qumranet.com>
Date: Tue, 20 Mar 2007 16:40:40 +0000 (+0200)
Subject: KVM: Workaround vmx inability to virtualize the reset state
X-Git-Tag: v2.6.22-rc1~1008^2~43
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8cb5b0333250beb382624f626851a31f601b4830;p=pandora-kernel.git

KVM: Workaround vmx inability to virtualize the reset state

The reset state has cs.selector == 0xf000 and cs.base == 0xffff0000,
which aren't compatible with vm86 mode, which is used for real mode
virtualization.

When we create a vcpu, we set cs.base to 0xf0000, but if we get there by
way of a reset, the values are inconsistent and vmx refuses to enter
guest mode.

Workaround by detecting the state and munging it appropriately.

Signed-off-by: Avi Kivity <avi@qumranet.com>
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