QEMU 9.2 Released With VirtIO GPU Vulkan Support, AVX10 & Experimental Rust Support

[phoronix]

Phoronix: QEMU 9.2 Released With VirtIO GPU Vulkan Support, AVX10 & Experimental Rust Support

QEMU 9.2 is out today for this processor emulator that plays an important role within the open-source Linux virtualization stack...

https://www.phoronix.com/news/QEMU-9.2-Released

[Quackdoc]

vulkan is a game changer, literally. I was trying to debug it working on bliss, but ran out of time.

[joaquinvacas]

vulkan is a game changer, literally. I was trying to debug it working on bliss, but ran out of time.

I am really interested on this, I also wonder if video transcoding could work now that Vulkan Video is a reality.

Hope to see this on next Proxmox release!

[gustavoar]

Please just give me a easy way to passthrough resizable BAR in VFIO

[Quackdoc]

Please just give me a easy way to passthrough resizable BAR in VFIO

is that not solved yet? and here I thought it was able to do a static resize at vm start time.

[gustavoar]

is that not solved yet? and here I thought it was able to do a static resize at vm start time.

Well, that works for some and not for others. I couldn't get it to work for me. Setting a static value is also kind of a workaround, would be nice to have proper support.

[akarypid]

So with the VritIO vulkan-based driver, will we even be able to assign the same GPU to multiple VMs and have them share it? Or did I not understand this correctly?

[Quackdoc]

So with the VritIO vulkan-based driver, will we even be able to assign the same GPU to multiple VMs and have them share it? Or did I not understand this correctly?

kinda, the perf isn't 1:1 but it is really high, so it could in effect act like that. but in reality, all it is, is vulkan passthrough in a sense.

[pgoetz]

So with the VritIO vulkan-based driver, will we even be able to assign the same GPU to multiple VMs and have them share it? Or did I not understand this correctly?

I think this is a hardware/video driver issue? Dealing with sharing the GPU memory in a coherent fashion would likely require Nvidia MIG, or something similar. Currently these features are not available on consumer grade cards.

[zaps166]

Please just give me a easy way to passthrough resizable BAR in VFIO

On AMD Ryzen platform I have to enable Above 4G decoding and disable RE-BAR in UEFI - in this configuration it works in Windows VMs when passing-through the GPU (CPU can see whole VRAM). Also the RE-BAR UEFI setting doesn't affect Linux host - it also work there regardless of this UEFI setting.

For me it looks like the "RE-BAR" UEFI setting affects only Windows (real, not VM).