问题
In a Windows application, I have a GetFirmwareEnvironmentVariableA function to read a firmware environment variable. Is there any way to write something in this variable in uefi driver and read from it later in Windows?
回答1:
The function to set an NVRAM variable is called SetVariable() and is available to UEFI drivers via EFI_RUNTIME_SERVICES table.
To know more about it's interface and usage, read chapter 7.2 Variable Services of the UEFI 2.6 specification.
来源：https://stackoverflow.com/questions/54557111/how-i-can-set-firmware-environment-variable-in-uefi-driver