KVM: x86: handle SMBASE as physical address in RSM

KVM: x86: handle SMBASE as physical address in RSM

commit f40606b147dd5b4678cedc877a71deb520ca507e upstream.

GET_SMSTATE depends on real mode to ensure that smbase+offset is treated
as a physical address, which has already caused a bug after shuffling
the code.  Enforce physical addressing.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reported-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>