[Qemu-trivial] [PATCH] intel_iommu: Correct caching-mode error message

[Alex Williamson]

If we try to use the intel-iommu device with vfio-pci devices without
caching mode enabled, we're told:

  qemu-system-x86_64: We need to set caching-mode=1 for intel-iommu to enable
  device assignment with IOMMU protection.

But to enable caching mode, the option is actually "caching-mode=on".

Signed-off-by: Alex Williamson <address@hidden>
---
 hw/i386/intel_iommu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index b90de6c66461..b62badd4f08d 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2919,7 +2919,7 @@ static void 
vtd_iommu_notify_flag_changed(IOMMUMemoryRegion *iommu,
     IntelIOMMUState *s = vtd_as->iommu_state;
 
     if (!s->caching_mode && new & IOMMU_NOTIFIER_MAP) {
-        error_report("We need to set caching-mode=1 for intel-iommu to enable "
+        error_report("We need to set caching-mode=on for intel-iommu to enable 
"
                      "device assignment with IOMMU protection.");
         exit(1);
     }