64130fa4a1
When H_SMRAME is 1, low memory at 0xa0000 is left alone by SMM, and instead the chipset maps the 0xa0000-0xbffff window at 0xfeda0000-0xfedbffff. This affects both the "non-SMM" view controlled by D_OPEN and the SMM view controlled by G_SMRAME, so add two new MemoryRegions and toggle the enabled/disabled state of all four in mch_update_smram. Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>