From: Jan Kiszka <jan.kiszka@siemens.com>
Date: Sat, 4 Jan 2014 17:47:17 +0000 (+0100)
Subject: KVM: VMX: Fix DR6 update on #DB exception
X-Git-Tag: v3.14-rc1~127^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8246bf52c75aa9b9b336a84f31ed2248754d0f71;p=pandora-kernel.git

KVM: VMX: Fix DR6 update on #DB exception

According to the SDM, only bits 0-3 of DR6 "may" be cleared by "certain"
debug exception. So do update them on #DB exception in KVM, but leave
the rest alone, only setting BD and BS in addition to already set bits
in DR6. This also aligns us with kvm_vcpu_check_singlestep.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

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