From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Thu, 30 Apr 2015 11:43:30 +0000 (+0200)
Subject: KVM: provide irq_unsafe kvm_guest_{enter|exit}
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~138^2~103
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0097d12e504b3ce57b68810737ad6a5a64a98c68;p=pandora-kernel.git

KVM: provide irq_unsafe kvm_guest_{enter|exit}

Several kvm architectures disable interrupts before kvm_guest_enter.
kvm_guest_enter then uses local_irq_save/restore to disable interrupts
again or for the first time. Lets provide underscore versions of
kvm_guest_{enter|exit} that assume being called locked.
kvm_guest_enter now disables interrupts for the full function and
thus we can remove the check for preemptible.

This patch then adopts s390/kvm to use local_irq_disable/enable calls
which are slighty cheaper that local_irq_save/restore and call these
new functions.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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