[+cc Ilpo, Jonathan] On Mon, Feb 10, 2025 at 11:07:15AM -0600, Bjorn Helgaas wrote: > #regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=219765 > > I don't see an obvious culprit between v6.12 and v6.13, suggested > bisection if possible. > > Workaround: boot with pcie_port_pm=off Update: pcie_port_pm=off turned out *not* to be a workaround, possibly a red herring due to configuration differences. > Given the workaround, maybe it's worth trying a revert of this: > > dc421bb3c0db ("PCI: Enable runtime PM of the host bridge") Reporter bisected to 665745f27487 ("PCI/bwctrl: Re-add BW notification portdrv as PCIe BW controller"). Bisect log in bugzilla. GPU passthrough works correctly after reverting these commits: 665745f27487 ("PCI/bwctrl: Re-add BW notification portdrv as PCIe BW controller") de9a6c8d5dbf ("PCI/bwctrl: Add pcie_set_target_speed() to set PCIe Link Speed") > ----- Forwarded message from bugzilla-daemon@xxxxxxxxxx ----- > > https://bugzilla.kernel.org/show_bug.cgi?id=219765 > > Created attachment 307599 > --> https://bugzilla.kernel.org/attachment.cgi?id=307599&action=edit > dmesg logs for the kernel in which gpu passthrough works > > After upgrading from Linux 6.12.10 to Linux 6.13.0, VFIO GPU passthrough fails > for an NVIDIA GPU (AD107). The GPU is not passed through to the VM, and its > audio device (01:00.1) disappears from Virt-Manager. This issue does not occur > in Linux 6.12.10. > > I have attached the logs.
