[Qemu-devel] [V1 4/4] hw/iommu: share common between IOMMUs

[David Kiarie]

Enabling interrupt remapping with kernel_irqchip=on should
result in error for both VT-d and AMD-Vi

Signed-off-by: David Kiarie <davidkiar...@gmail.com>
---
 hw/i386/intel_iommu.c | 9 ---------
 hw/i386/x86-iommu.c   | 8 ++++++++
 2 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 7c80907..857f9f1 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -30,7 +30,6 @@
 #include "hw/boards.h"
 #include "hw/i386/x86-iommu.h"
 #include "hw/pci-host/q35.h"
-#include "sysemu/kvm.h"
 
 #define DEBUG_INTEL_IOMMU
 #ifdef DEBUG_INTEL_IOMMU
@@ -2472,14 +2471,6 @@ static void vtd_realize(DeviceState *dev, Error **errp)
         Q35_PSEUDO_DEVFN_IOAPIC;
     /* Pseudo address space under root PCI bus. */
     pcms->ioapic_as = vtd_host_dma_iommu(bus, s, Q35_PSEUDO_DEVFN_IOAPIC);
-
-    /* Currently Intel IOMMU IR only support "kernel-irqchip={off|split}" */
-    if (x86_iommu->intr_supported && kvm_irqchip_in_kernel() &&
-        !kvm_irqchip_is_split()) {
-        error_report("Intel Interrupt Remapping cannot work with "
-                     "kernel-irqchip=on, please use 'split|off'.");
-        exit(1);
-    }
 }
 
 static void vtd_class_init(ObjectClass *klass, void *data)
diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c
index 2278af7..66510f7 100644
--- a/hw/i386/x86-iommu.c
+++ b/hw/i386/x86-iommu.c
@@ -21,6 +21,7 @@
 #include "hw/sysbus.h"
 #include "hw/boards.h"
 #include "hw/i386/x86-iommu.h"
+#include "sysemu/kvm.h"
 #include "qemu/error-report.h"
 #include "trace.h"
 
@@ -84,6 +85,13 @@ static void x86_iommu_realize(DeviceState *dev, Error **errp)
     if (x86_class->realize) {
         x86_class->realize(dev, errp);
     }
+    /* Currently IOMMU IR only support "kernel-irqchip={off|split}" */
+    if (x86_iommu->intr_supported && kvm_irqchip_in_kernel() &&
+        !kvm_irqchip_is_split()) {
+        error_report("Interrupt Remapping cannot work with "
+                     "kernel-irqchip=on, please use 'split|off'.");
+        exit(1);
+    }
 
     x86_iommu_set_default(X86_IOMMU_DEVICE(dev));
 }
-- 
2.1.4