On Tue, May 28, 2019 at 11:13:24PM +0200, Cédric Le Goater wrote: > Under XIVE, the ESB pages of an interrupt are used for interrupt > management (EOI) and triggering. They are made available to guests > through a mapping of the XIVE KVM device. > > When a device is passed-through, the passthru_irq helpers, > kvmppc_xive_set_mapped() and kvmppc_xive_clr_mapped(), clear the ESB > pages of the guest IRQ number being mapped and let the VM fault > handler repopulate with the correct page. > > The ESB pages are mapped at offset 4 (KVM_XIVE_ESB_PAGE_OFFSET) in the > KVM device mapping. Unfortunately, this offset was not taken into > account when clearing the pages. This lead to issues with the > passthrough devices for which the interrupts were not functional under > some guest configuration (tg3 and single CPU) or in any configuration > (e1000e adapter). > > Signed-off-by: Cédric Le Goater <clg@xxxxxxxx> Thanks, patch applied to my kvm-ppc-fixes branch. Paul.
