[Bug 223906] arm64 kassert failure on boot in efi_create_1t1_map

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223906

            Bug ID: 223906
           Summary: arm64 kassert failure on boot in efi_create_1t1_map
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: arm
          Assignee: freebsd-arm at FreeBSD.org
          Reporter: emaste at freebsd.org

--- Kernel configuration ---
include GENERIC

ident   PACKET

nooptions       VIMAGE
options         ALT_BREAK_TO_DEBUGGER
options         DEBUG_LOCKS
options         DEBUG_VFS_LOCKS
options         DIAGNOSTIC
-------

Panic on boot, 2-socket 96-core ThunderX at packet.net:

FreeBSD/SMP: Multiprocessor System Detected: 96 CPUs
random: unblocking device.
MAP 500000 mode 2 pages 2048
MAP fffec000 mode 2 pages 20
MAP 10ffe7b9000 mode 2 pages 3071
MAP 10fff3b8000 mode 2 pages 3143
MAP 803000000000 mode 1 pages 4096
MAP 804000001000 mode 1 pages 8192
MAP 87e006001000 mode 1 pages 4096
MAP 87e024000000 mode 1 pages 4096
MAP 87e0d0001000 mode 1 pages 1
MAP 903000000000 mode 1 pages 4096
MAP 904000001000 mode 1 pages 8192
MAP 97e006001000 mode 1 pages 4096
panic: efi_1t1_l3: Already mapped: va 0x97e006400000 *pt 0x87e007000707
cpuid = 0
time = 1
KDB: stack backtrace:
db_trace_self() at db_trace_self_wrapper+0x28
         pc = 0xffff0000005f2b08  lr = 0xffff000000087048
         sp = 0xffff000000010710  fp = 0xffff000000010920

db_trace_self_wrapper() at vpanic+0x184
         pc = 0xffff000000087048  lr = 0xffff000000316934
         sp = 0xffff000000010930  fp = 0xffff0000000109b0

vpanic() at kassert_panic+0x158
         pc = 0xffff000000316934  lr = 0xffff0000003167ac
         sp = 0xffff0000000109c0  fp = 0xffff000000010a80

kassert_panic() at efi_create_1t1_map+0x26c
         pc = 0xffff0000003167ac  lr = 0xffff0000005f44a0
         sp = 0xffff000000010a90  fp = 0xffff000000010b00

efi_create_1t1_map() at efirt_modevents+0x100
         pc = 0xffff0000005f44a0  lr = 0xffff0000000ca6e4
         sp = 0xffff000000010b10  fp = 0xffff000000010b20

efirt_modevents() at module_register_init+0xc8
         pc = 0xffff0000000ca6e4  lr = 0xffff0000002f6654
         sp = 0xffff000000010b30  fp = 0xffff000000010b60

module_register_init() at mi_startup+0xc8
         pc = 0xffff0000002f6654  lr = 0xffff0000002b4848
         sp = 0xffff000000010b70  fp = 0xffff000000010bb0

mi_startup() at virtdone+0x54
         pc = 0xffff0000002b4848  lr = 0xffff000000001084
         sp = 0xffff000000010bc0  fp = 0x0000000000000000

KDB: enter: panic
[ thread pid 0 tid 100000 ]
Stopped at      0

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