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# HG changeset patch
# User Keir Fraser <keir.fraser@citrix.com>
# Date 1268294998 0
# Node ID 5b8e012641e21b3f62350b707fe1e52557f17829
# Parent d3720d9511739fc009aad2076e77e9437c175d07
iommu: clear the iommu_* variables to 0 when iommu is not enabled.

With "iommu=0" xen parameter, the 3 iommu_* variables are still left
to the default value 1 -- this is misleading...

Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
---
xen/drivers/passthrough/iommu.c | 5 +++++
1 files changed, 5 insertions(+)

diff -r d3720d951173 -r 5b8e012641e2 xen/drivers/passthrough/iommu.c
--- a/xen/drivers/passthrough/iommu.c Thu Mar 11 08:09:37 2010 +0000
+++ b/xen/drivers/passthrough/iommu.c Thu Mar 11 08:09:58 2010 +0000
@@ -288,7 +288,12 @@ int iommu_setup(void)
panic("IOMMU setup failed, crash Xen for security purpose!\n");

if ( !iommu_enabled )
+ {
iommu_pv_enabled = 0;
+ iommu_snoop = 0;
+ iommu_qinval = 0;
+ iommu_intremap = 0;
+ }
printk("I/O virtualisation %sabled\n", iommu_enabled ? "en" : "dis");
if ( iommu_enabled )
printk("I/O virtualisation for PV guests %sabled\n",

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