[    0.000000] Checking aperture...
[    0.000000] No AGP bridge found
[    0.000000] Calgary: detecting Calgary via BIOS EBDA area
[    0.000000] Calgary: Unable to locate Rio Grande table in EBDA - bailing!
[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: CPU: 0 PID: 0 at /build/buildd/linux-3.13.0/drivers/iommu/dmar.c:488 warn_invalid_dmar+0x7e/0x90()
[    0.000000] Your BIOS is broken; DMAR reported at address fed93000 returns all ones!
[    0.000000] BIOS vendor: American Megatrends Inc.; Ver: P1.80; Product Version: To Be Filled By O.E.M.
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.13.0-46-generic #79-Ubuntu
[    0.000000] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./H55M-LE, BIOS P1.80 10/20/2010
[    0.000000]  000000000000000b ffffffff81c01de8 ffffffff817212c6 ffffffff81c01e30
[    0.000000]  ffffffff81c01e20 ffffffff810677dd ffffffff81fe001c ffffffff81fe0060
[    0.000000]  00000000fed93000 0000000000000000 ffffffff81c01fb0 ffffffff81c01e80
[    0.000000] Call Trace:
[    0.000000]  [<ffffffff817212c6>] dump_stack+0x45/0x56
[    0.000000]  [<ffffffff810677dd>] warn_slowpath_common+0x7d/0xa0
[    0.000000]  [<ffffffff81067894>] warn_slowpath_fmt_taint+0x44/0x50
[    0.000000]  [<ffffffff81d4ffaf>] ? __early_set_fixmap+0xa0/0xa5
[    0.000000]  [<ffffffff815f7bde>] warn_invalid_dmar+0x7e/0x90
[    0.000000]  [<ffffffff81d8ae9d>] check_zero_address+0xd6/0xf4
[    0.000000]  [<ffffffff81d8aed0>] detect_intel_iommu+0x15/0xae
[    0.000000]  [<ffffffff81d40082>] pci_iommu_alloc+0x4a/0x6c
[    0.000000]  [<ffffffff81d4fd05>] mem_init+0x17/0x9c
[    0.000000]  [<ffffffff81d35d3a>] start_kernel+0x202/0x443
[    0.000000]  [<ffffffff81d35941>] ? repair_env_string+0x5c/0x5c
[    0.000000]  [<ffffffff81d35120>] ? early_idt_handlers+0x120/0x120
[    0.000000]  [<ffffffff81d355ee>] x86_64_start_reservations+0x2a/0x2c
[    0.000000]  [<ffffffff81d35733>] x86_64_start_kernel+0x143/0x152
[    0.000000] ---[ end trace bb875563657bc452 ]---