@@ -12,12 +12,15 @@ config IOAPIC
config ARM_GIC
bool
+ select MSI_NONBROKEN
config OPENPIC
bool
+ select MSI_NONBROKEN
config APIC
bool
+ select MSI_NONBROKEN
config ARM_GIC_KVM
bool
@@ -49,3 +49,4 @@ config PCI_EXPRESS_XILINX
config PCI_EXPRESS_DESIGNWARE
bool
select PCI_EXPRESS
+ select MSI_NONBROKEN
@@ -7,3 +7,9 @@ config PCI_EXPRESS
config PCI_DEVICES
bool
+
+config MSI_NONBROKEN
+ # selected by interrupt controllers that do not support MSI,
+ # or support it and have a good implementation. See commit
+ # 47d2b0f33c664533b8dbd5cb17faa8e6a01afe1f.
+ bool
@@ -8,6 +8,7 @@ config PSERIES
select VFIO if LINUX # needed by spapr_pci_vfio.c
select XICS_SPAPR
select XIVE_SPAPR
+ select MSI_NONBROKEN
config SPAPR_RNG
bool
@@ -6,6 +6,7 @@ config HART
config SIFIVE
bool
+ select MSI_NONBROKEN
config SIFIVE_E
bool
@@ -9,3 +9,4 @@ config S390_CCW_VIRTIO
select S390_FLIC
select SCLPCONSOLE
select VIRTIO_CCW
+ select MSI_NONBROKEN
Not all interrupt controllers have a working implementation of message-signalled interrupts; in some cases, the guest may expect MSI to work but it won't due to the buggy or lacking emulation. In QEMU this is represented by the "msi_nonbroken" variable. This patch adds a new configuration symbol enabled whenever the binary contains an interrupt controller that will set "msi_nonbroken". We can then use it to remove devices that cannot be possibly added to the machine, because they require MSI. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> --- hw/intc/Kconfig | 3 +++ hw/pci-host/Kconfig | 1 + hw/pci/Kconfig | 6 ++++++ hw/ppc/Kconfig | 1 + hw/riscv/Kconfig | 1 + hw/s390x/Kconfig | 1 + 6 files changed, 13 insertions(+)