On Tue Sep 2, 2025 at 1:21 PM CEST, Daniel Kral wrote: > Since QEMU 9.2 [0], the default I/O address space bit width was raised > from 39 bits to 48 bits for the Intel vIOMMU driver, which makes the > aw-bits check introduced in [1] to trip for host CPUs with less than 48 > bits physical address width from QEMU 9.2 onwards: > > vfio 0000:XX:YY.Z: Failed to set vIOMMU: aw-bits 48 > host aw-bits 39 > > For VFIO devices where a vIOMMU is in-use, QEMU fetches the IOVA ranges > with the iommufd ioctl IOMMU_IOAS_IOVA_RANGES or the vfio_iommu_type1's > VFIO_IOMMU_TYPE1_INFO_CAP_IOVA_RANGE info, so 'phys-bits' doesn't change > the behavior of the check. > > Therefore, expose the 'aw-bits' option of the intel-iommu and > virtio-iommu QEMU drivers to allow users to set the value. > > [0] > https://lore.kernel.org/qemu-devel/20241212083757.605022-17-zhenzhong.d...@intel.com/ > [1] > https://lore.kernel.org/qemu-devel/20240605083043.317831-18-zhenzhong.d...@intel.com/ > > Signed-off-by: Daniel Kral <d.k...@proxmox.com>
This patch is superseded by v3 [0]. For the rest of the series, I'll follow up later, just wanted to get this out to users sooner than later ;). [0] https://lore.proxmox.com/pve-devel/20250905141529.215689-1-d.k...@proxmox.com/ _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
