=====UEFI HTTP Boot (instead of TFTP) =====
This how-to is based on Debian 9 and will result in a compiled EFI firmware binary, capable of booting over HTTP instead of TFTP.

New systems that support UEFI 2.5 and up ([[https://www.hpe.com/us/en/product-catalog/detail/pip.6935826.html|HPE]], [[https://lenovopress.com/lp0736.pdf|Lenovo]]) will be able to boot over HTTP(S). Compared to TFTP, HTTP is faster, can transfer much larger files and can be encrypted (TLS).

Documentation:
  * Build OVMF: [[https://github.com/tianocore/tianocore.github.io/wiki/How-to-build-OVMF]]
  * HTTP Boot: [[https://github.com/tianocore/tianocore.github.io/wiki/HTTP-Boot]]

====Compile EDK II====
  * Install required packages: <code>sudo apt-get install build-essential uuid-dev iasl git nasm</code>
  * Clone git repository:<code>mkdir ~/src
cd ~/src
git clone https://github.com/tianocore/edk2</code>
  * Compile build tools:<code>cd ~/src/edk2
make -C BaseTools
. edksetup.sh</code>
  * Build the EDK II BaseTools:<code>cd ..
make -C edk2/BaseTools</code>
  * Setup build shell environment<code>cd ~/src/edk2
export EDK_TOOLS_PATH=$HOME/src/edk2/BaseTools
. edksetup.sh BaseTools</code>
  * Modify config ''Conf/target.txt'' <code>
ACTIVE_PLATFORM       = OvmfPkg/OvmfPkgX64.dsc
TARGET_ARCH           = X64
TARGET                = NOOPT
TOOL_CHAIN_TAG        = GCC5
</code>
  * Enable HTTP boot in ''OvmfPkg/OvmfPkgX64.dsc'' <code>  DEFINE HTTP_BOOT_ENABLE        = TRUE
</code>
  * Build:<code>build</code>
  * After successful compilation, the binary can be found in ''~/src/edk2/Build/OvmfX64/NOOPT_GCC5/FV/''<code>

OVMF_CODE.fd     Binary
OVMF_VARS.fd     Variable store
</code>

====Test with qemu====
  * Install qemu:<code>sudo apt-get install qemu-system-x86</code>
  * Start VM with EFI firmware:<code>
qemu-system-x86_64 \
    -drive if=pflash,format=raw,readonly,file=OVMF_CODE.fd \
    -drive if=pflash,format=raw,file=OVMF_VARS.fd \
    -enable-kvm \
    -m 1G \
    -monitor stdio
</code>
Press ESC at the logo \\
{{::tianocore-esc.png?nolink|}}

Go to ''Boot Manager''\\
{{:efi-boot-manager.png?nolink|}}

Select ''UEFI HTTPv4'' \\
{{::efi-http.png?nolink|}}


{{tag>[qemu UEFI EFI Tianocore EDKII]}}