How does shared graphics memory work?
It is my understanding that when you set how much system memory to share with the graphics controller in the BIOS, this then becomes invisible to the OS, So this makes me wonder how the OS assigns this memory range to the graphics controller if it can't see it.
I looked at my Intel graphics controller on my PC and noticed it is enumerated by PCI. I thought the PCI bus driver ran when the OS was loaded and the PCI driver asked the OS what hardware resources to assign.
Can anyone offer an explanation as to how shared graphics memory works it would be greatly appreciated?
Thanks.