Re: PCIe atomics in pcie-root-port

2023-04-12 Thread Robin Voetter
On 4/6/23 20:40, Alex Williamson wrote: I think the typical approach for QEMU would be expose options in the downstream ports that would then need to be enabled by the user or management tool, but that's where the complication begins. At some point we would want management tools to "do the righ

Re: PCIe atomics in pcie-root-port

2023-04-06 Thread Alex Williamson
On Thu, 6 Apr 2023 11:29:34 +0200 Robin Voetter wrote: > Hello, > > I am trying to use qemu to run ROCm in a virtual machine via GPU > passthrough with vfio-pci. While this mostly works out of the box, ROCm > requires PCIe atomics to function properly, and it seems like that this > is a featu

PCIe atomics in pcie-root-port

2023-04-06 Thread Robin Voetter
Hello, I am trying to use qemu to run ROCm in a virtual machine via GPU passthrough with vfio-pci. While this mostly works out of the box, ROCm requires PCIe atomics to function properly, and it seems like that this is a feature that is missing in qemu. The setup is using a simple PCie topolo