Alex Williamson c87759ce87 q35: Revert to kernel irqchip ... Commit b2fc91db84 ("q35: set split kernel irqchip as default") changed the default for the pc-q35-4.0 machine type to use split irqchip, which turned out to have disasterous effects on vfio-pci INTx support. KVM resampling irqfds are registered for handling these interrupts, but these are non-functional in split irqchip mode. We can't simply test for split irqchip in QEMU as userspace handling of this interrupt is a significant performance regression versus KVM handling (GeForce GPUs assigned to Windows VMs are non-functional without forcing MSI mode or re-enabling kernel irqchip). The resolution is to revert the change in default irqchip mode in the pc-q35-4.1 machine and create a pc-q35-4.0.1 machine for the 4.0-stable branch. The qemu-q35-4.0 machine type should not be used in vfio-pci configurations for devices requiring legacy INTx support without explicitly modifying the VM configuration to use kernel irqchip. Link: https://bugs.launchpad.net/qemu/+bug/1826422 Fixes: b2fc91db84 ("q35: set split kernel irqchip as default") Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Message-Id: <155786484688.13873.6037015630912983760.stgit@gimli.home> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2019-06-03 14:03:03 +02:00
..
apic_internal.h	Revert "apic: save apic_delivered flag"	2017-03-27 14:41:01 +02:00
apic-msidef.h	i386/msi: Correct mask of destination ID in MSI address	2017-12-01 18:28:15 +02:00
apic.h	apic: add function to apic that will be used by hvf	2017-12-22 15:01:19 +01:00
ich9.h	hw/i386/acpi: Add object_resolve_type_unambiguous to improve modularity	2019-05-17 15:19:24 +02:00
intel_iommu.h	intel_iommu: Drop extended root field	2019-04-02 11:49:14 -04:00
ioapic_internal.h	ioapic: allow buggy guests mishandling level-triggered interrupts to make progress	2019-05-17 15:19:39 +02:00
ioapic.h	ioapic: use TYPE_FOO MACRO than constant string	2019-01-09 11:33:47 +01:00
pc.h	q35: Revert to kernel irqchip	2019-06-03 14:03:03 +02:00
topology.h
x86-iommu.h	Clean up header guards that don't match their file name	2019-05-13 08:58:55 +02:00