Cédric Le Goater <c...@kaod.org> writes: > On 4/29/20 9:51 AM, Cédric Le Goater wrote: >> When a passthrough IO adapter is removed from a pseries machine using >> hash MMU and the XIVE interrupt mode, the POWER hypervisor, pHyp, >> expects the guest OS to have cleared all page table entries related to >> the adapter. If some are still present, the RTAS call which isolates >> the PCI slot returns error 9001 "valid outstanding translations" and >> the removal of the IO adapter fails. >> >> INTx interrupt numbers need special care because Linux maps the >> interrupts automatically in the Linux interrupt number space if they >> are presented in the device tree node describing the IO adapter. These >> interrupts are not un-mapped automatically and in case of an hot-plug >> adapter, the PCI hot-plug layer needs to handle the cleanup to make >> sure that all the page table entries of the XIVE ESB pages are >> cleared. > > It seems this patch needs more digging to make sure we are handling > the IRQ unmapping in the correct PCI handler. Could you please keep > it back for the moment ?
Yep no worries. cheers
