Feature Request - add x2APIC support to XG kernel

Whilst trying to install Sophos XG onto an x86_64 device via serial console, I encountered the following error:

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Booting a command listBooting a command list

error: no suitable video mode found.
error: no suitable video mode found.
Booting in blind modeBooting in blind mode 

[ 0.065428] Kernel panic - not syncing: BIOS has enabled x2apic but kernel doesn't support x2apic, please disable x2apic in BIOS.
[ 0.065428]
[ 0.068000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.14.38-crl #2
[ 0.068000] Hardware name: Default string Default string/Default string, BIOS 5.13 10/04/2018
[ 0.068000] Call Trace:
[ 0.068000] dump_stack+0x5d/0x79
[ 0.068000] ? setup_disableapic+0x3/0x17
[ 0.068000] panic+0xd3/0x221
[ 0.068000] ? lapic_cal_handler+0xb6/0xb6
[ 0.068000] validate_x2apic+0x2b/0x2f
[ 0.068000] do_one_initcall+0x83/0x118
[ 0.068000] ? proc_create_data+0x78/0x8f
[ 0.068000] kernel_init_freeable+0x68/0x1a6
[ 0.068000] ? rest_init+0xa0/0xa0
[ 0.068000] kernel_init+0x5/0xe1
[ 0.068000] ret_from_fork+0x1f/0x30
[ 0.068000] Rebooting in 3 seconds..
[ 0.068000] ACPI MEMORY or I/O RESET_REG.

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I was trying to install SW-18.0.4_MR-4-506.iso from USB.

The machine is running an Intel Atom C3558, and the BIOS doesn't allow for the disabling of x2APIC so I can't test the firewall on this chassis.

Kernel boot line:

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linux /LINUX loglevel=3 console=ttyS0,38400n8 ---

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Had to remove quiet and console=tty0 so I'd get output on the serial console.

I should be able to get around the problem by abstracting with KVM/QEMU but we're wanting to try the software natively on the chassis.

Other Linux distro's (Ubuntu, Centos) work fine.