Re: DMA region abruptly removed from PCI device

2020-07-07 Thread Alex Williamson
On Tue, 7 Jul 2020 10:38:01 + Felipe Franciosi wrote: > > On Jul 6, 2020, at 3:20 PM, Alex Williamson > > wrote: > > > > On Mon, 6 Jul 2020 10:55:00 + > > Thanos Makatos wrote: > > > >> We have an issue when using the VFIO-over-socket libmuser PoC > >>

Re: DMA region abruptly removed from PCI device

2020-07-07 Thread Felipe Franciosi
> On Jul 6, 2020, at 3:20 PM, Alex Williamson > wrote: > > On Mon, 6 Jul 2020 10:55:00 + > Thanos Makatos wrote: > >> We have an issue when using the VFIO-over-socket libmuser PoC >> (https://www.mail-archive.com/qemu-devel@nongnu.org/msg692251.html) instead >> of >> the VFIO kernel

Re: DMA region abruptly removed from PCI device

2020-07-06 Thread Alex Williamson
On Mon, 6 Jul 2020 10:55:00 + Thanos Makatos wrote: > We have an issue when using the VFIO-over-socket libmuser PoC > (https://www.mail-archive.com/qemu-devel@nongnu.org/msg692251.html) instead of > the VFIO kernel module: we notice that DMA regions used by the emulated device > can be

DMA region abruptly removed from PCI device

2020-07-06 Thread Thanos Makatos
We have an issue when using the VFIO-over-socket libmuser PoC (https://www.mail-archive.com/qemu-devel@nongnu.org/msg692251.html) instead of the VFIO kernel module: we notice that DMA regions used by the emulated device can be abruptly removed while the device is still using them. The PCI device