From 8d211f622b11ac2877c344f29de284d5a842d9d7 Mon Sep 17 00:00:00 2001 From: Bandan Das Date: Fri, 13 Nov 2015 01:55:48 -0500 Subject: i440fx: print an error message if user tries to enable iommu There's no indication of any sort that i440fx doesn't support "iommu=on" Reviewed-by: Eric Blake Signed-off-by: Bandan Das Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Reviewed-by: Eric Blake Signed-off-by: Bandan Das --- hw/pci-host/piix.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c index 7b2fbf9598..715208b22a 100644 --- a/hw/pci-host/piix.c +++ b/hw/pci-host/piix.c @@ -34,6 +34,7 @@ #include "sysemu/sysemu.h" #include "hw/i386/ioapic.h" #include "qapi/visitor.h" +#include "qemu/error-report.h" /* * I440FX chipset data sheet. @@ -301,6 +302,10 @@ static void i440fx_pcihost_realize(DeviceState *dev, Error **errp) static void i440fx_realize(PCIDevice *dev, Error **errp) { dev->config[I440FX_SMRAM] = 0x02; + + if (object_property_get_bool(qdev_get_machine(), "iommu", NULL)) { + error_report("warning: i440fx doesn't support emulated iommu"); + } } PCIBus *i440fx_init(const char *host_type, const char *pci_type, -- cgit v1.2.3