August 5, 20214 yr I've been toying with the idea of running unRAID on my gaming desktop to be able to run various OSs as VMs. My question is does AMD's resizable bar implementation work in a VM? System is a Ryzen 9 5900X and a Radeon 6800XT on a Gigabyte X570 Master motherboard. Edited August 5, 20214 yr by Moshenokoji Forgot to include system specs which may be helpful.
August 11, 20214 yr At the time of writing, with a standard qemu installation, no, it's not available on the guest. A custom compilation of qemu can enable smart access memory, but the system will be unstable. If you look at the pci.c qemu source code in github: https://github.com/qemu/qemu/blob/master/hw/vfio/pci.c you will find that resizable bar is hidden for the guest: https://github.com/qemu/qemu/commit/3412d8ec9810b819f8b79e8e0c6b87217c876e32 Edited August 11, 20214 yr by ghost82
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