On 7/22/26 23:29, Michael Tokarev wrote:
On 7/15/26 10:06, Cédric Le Goater wrote:
The dma-buf failure messages in vfio_region_create_dma_buf() say "PCI
BAR IOMMU mappings may fail", which suggests the BAR is broken. In
practice, only P2P DMA is affected -- normal passthrough uses the mmap
fallback.
Reword both messages to mention P2P DMA explicitly and clarify that
the mmap fallback is in use. Use warn_report_err_once() at the call
site so per-BAR repetition on mdev devices is suppressed.
Fixes: dcf1b77e834d ("hw/vfio/region: Create dmabuf for PCI BAR per region")
FWIW (it's applied to master branch already), this is commit 8cfaf22668c,
not dcf1b77e834d.
My bad, dcf1b77e834d is the same commit in an old local vfio-next branch :/
I sent a scripts/checkpatch update to catch these.
Thanks,
C.
