KVM code might have to call functions on the PCIDevice that is
passed to kvm_arch_fixup_msi_route().  This fails in the case
where --without-default-devices is used and no board is
configured.  While this is not really a useful configuration,
and therefore setting up stubs for CONFIG_PCI is overkill,
failing the build is impolite.  Just include the PCI
subsystem if kvm_arch_fixup_msi_route() requires it, as
is the case for ARM and x86.

Reported-by: Philippe Mathieu-Daudé <phi...@linaro.org>
Tested-by: Fabiano Rosas <faro...@suse.de>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
 target/arm/Kconfig  | 2 ++
 target/i386/Kconfig | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/target/arm/Kconfig b/target/arm/Kconfig
index bf57d739cd1..5847c5a74a7 100644
--- a/target/arm/Kconfig
+++ b/target/arm/Kconfig
@@ -9,3 +9,5 @@ config ARM
 config AARCH64
     bool
     select ARM
+    # kvm_arch_fixup_msi_route() needs to access PCIDevice
+    select PCI if KVM
diff --git a/target/i386/Kconfig b/target/i386/Kconfig
index ce6968906ee..46898946394 100644
--- a/target/i386/Kconfig
+++ b/target/i386/Kconfig
@@ -1,5 +1,7 @@
 config I386
     bool
+    # kvm_arch_fixup_msi_route() needs to access PCIDevice
+    select PCI if KVM
 
 config X86_64
     bool
-- 
2.44.0


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