From: Chris J Arges <chris.j.arges@canonical.com>
Date: Thu, 13 Nov 2014 03:00:39 +0000 (-0600)
Subject: kvm: svm: move WARN_ON in svm_adjust_tsc_offset
X-Git-Tag: omap-for-v3.19/fixes-rc1~43^2~64
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d913b904355721e0aabb28dc8be2a3121de2e794;p=pandora-kernel.git

kvm: svm: move WARN_ON in svm_adjust_tsc_offset

When running the tsc_adjust kvm-unit-test on an AMD processor with the
IA32_TSC_ADJUST feature enabled, the WARN_ON in svm_adjust_tsc_offset can be
triggered. This WARN_ON checks for a negative adjustment in case __scale_tsc
is called; however it may trigger unnecessary warnings.

This patch moves the WARN_ON to trigger only if __scale_tsc will actually be
called from svm_adjust_tsc_offset. In addition make adj in kvm_set_msr_common
s64 since this can have signed values.

Signed-off-by: Chris J Arges <chris.j.arges@canonical.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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