tree 5aa672f62fde25a0eaedcdbca40b9db3001f877c
parent 5808844f03b4b31a13a87cf41cc0701718c1b622
author James Hogan <james.hogan@imgtec.com> 1467975208 +0100
committer Paolo Bonzini <pbonzini@redhat.com> 1470069745 +0200

MIPS: KVM: Sign extend MFC0/RDHWR results

When emulating MFC0 instructions to load 32-bit values from guest COP0
registers and the RDHWR instruction to read the CC (Count) register,
sign extend the result to comply with the MIPS64 architecture. The
result must be in canonical 32-bit form or the guest may malfunction.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>