The first release candidate of FreeBSD 11.0-STABLE is out. Below, excerpted from their release notes, is an excerpt of some of the changes:
Initial support for the ARM AArch64 architecture has been added. [r280259] (Sponsored by The FreeBSD Foundation)
Initial ACPI support has been added for FreeBSD/aarch64. [r284273] (Sponsored by The FreeBSD Foundation)
The uefisign(8) utility has been added. [r279315] (Sponsored by The FreeBSD Foundation)
Support for bzipfs has been added to the EFI loader. [r279950]
The mkimg(1) utility has been updated to support the MBR EFI partition type. [r276893] (Sponsored by The FreeBSD Foundation)
The gpart(8) utility has been updated to include a new attribute for GPT partitions, lenovofix, which when set, which works around BIOS compatibility issues reported on several Lenovo โข laptops. [r285594] (Sponsored by ScaleEngine, Inc.)
[arm] The arm boot loader, ubldr, is now relocatable. In addition, ubldr.bin is now created during build time, which is a stripped binary with an entry point of 0, providing the ability to specify the load address by running go ${loadaddr} in u-boot. [r282731]
Support for the โVirtual Interrupt Deliveryโ feature of Intelยฎ VT-x is enabled if supported by the CPU. This feature can be disabled by running sysctl hw.vmm.vmx.use_apic_vid=0. Additionally, to persist this setting across reboots, add hw.vmm.vmx.use_apic_vid=0 to /etc/sysctl.conf. [r260410]
Support for โPosted Interrupt Processingโ is enabled if supported by the CPU. This feature can be disabled by running sysctl hw.vmm.vmx.use_apic_pir=0. Additionally, to persist this setting across reboots, add hw.vmm.vmx.use_apic_pir=0 to /etc/sysctl.conf. [r260532]
Support for running a FreeBSD/amd64 Xen guest instance as PVH guest has been added. PVH mode, short for โPara-Virtualized Hardwareโ, uses para-virtualized drivers for boot and I/O, and uses hardware virtualization extensions for all other tasks, without the need for emulation. [r267536] (Sponsored by Citrix Systems R&D)
The bhyve(8) hypervisor has been updated to support AMDยฎ processors with SVM and AMD-V hardware extensions. [r273375]
The Hyper-Vโข drivers have been updated with several enhancements: [r282212] (Sponsored by Microsoft Open Source Technology Center)
A new device control utility, devctl(8) has been added, which allows making administrative changes to individual devices, such as attaching and detaching drivers, and enabling and disabling devices. The devctl(8) utility uses the new devctl(3) library. [r278320]
The pciconf(8) utility has been updated to use the PCI ID database from the misc/pciids package, if present, falling back to the PCI ID database in the FreeBSD base system. [r287522]
The acpi(4) subsystem has been updated to version 20150818. [r287168]
ACPICA has been updated to version 20160527. [r300879]
Firmware for Intelยฎ Centrinoโข Wireless-N 105 devices has been added to the base system. [r260552]
The stack protector has been upgraded to the “strong” level, elevating the protection against buffer overflows. While this significantly improves the security of the system, extensive testing was done to ensure there are no measurable side effects in performance or functionality. [r288669]
An issue that could cause a system to hang when entering ACPI S3 state (suspend to RAM) has been corrected in the acpi(4) and pci(4) drivers. [r274386]
Full relnotes:
https://www.freebsd.org/releases/11.0R/relnotes.html
http://www.freebsd.org/news/newsflash.html#event20160813:01
Firmware Security 
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