kvm: nVMX: Allow L1 to intercept software exceptions (#BP and #OF)

kvm: nVMX: Allow L1 to intercept software exceptions (#BP and #OF)

[ Upstream commit ef85b67385436ddc1998f45f1d6a210f935b3388 ]

When L2 exits to L0 due to "exception or NMI", software exceptions
(#BP and #OF) for which L1 has requested an intercept should be
handled by L1 rather than L0. Previously, only hardware exceptions
were forwarded to L1.

Signed-off-by: Jim Mattson <jmattson@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>