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authorJoerg Roedel <joerg.roedel@amd.com>2008-11-17 15:09:20 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2008-11-18 15:44:31 +0100
commit3ce1f93c6d53c3f91c3846cf66b018276c8ac2e7 (patch)
treeb6dd5e06c031f03aa7c81da818e90c52569707f9 /arch/x86
parente5e1f606ecbf67e52ebe2df5d14f8b94ec6544d0 (diff)
downloadop-kernel-dev-3ce1f93c6d53c3f91c3846cf66b018276c8ac2e7.zip
op-kernel-dev-3ce1f93c6d53c3f91c3846cf66b018276c8ac2e7.tar.gz
AMD IOMMU: enable device isolation per default
Impact: makes device isolation the default for AMD IOMMU Some device drivers showed double-free bugs of DMA memory while testing them with AMD IOMMU. If all devices share the same protection domain this can lead to data corruption and data loss. Prevent this by putting each device into its own protection domain per default. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/amd_iommu_init.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 838a2e1..595edd2 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -121,7 +121,7 @@ u16 amd_iommu_last_bdf; /* largest PCI device id we have
LIST_HEAD(amd_iommu_unity_map); /* a list of required unity mappings
we find in ACPI */
unsigned amd_iommu_aperture_order = 26; /* size of aperture in power of 2 */
-int amd_iommu_isolate; /* if 1, device isolation is enabled */
+int amd_iommu_isolate = 1; /* if 1, device isolation is enabled */
bool amd_iommu_unmap_flush; /* if true, flush on every unmap */
LIST_HEAD(amd_iommu_list); /* list of all AMD IOMMUs in the
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