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authorSohil Mehta <sohil.mehta@intel.com>2017-12-20 20:59:24 +0100
committerJoerg Roedel <jroedel@suse.de>2018-01-17 15:02:49 +0100
commit5e3b4a15dd8da6bded2092694c8db3b505cbf711 (patch)
tree34c9140038e015b08883a693734e95ced01512c9 /drivers/iommu
parentiommu/vt-d: Use domain instead of cache fetching (diff)
downloadlinux-5e3b4a15dd8da6bded2092694c8db3b505cbf711.tar.xz
linux-5e3b4a15dd8da6bded2092694c8db3b505cbf711.zip
iommu/vt-d: Enable upto 57 bits of domain address width
Update the IOMMU default domain address width to 57 bits. This would enable the IOMMU to do upto 5-levels of paging for second level translations - IOVA translation requests without PASID. Even though the maximum supported address width is being increased to 57, __iommu_calculate_agaw() would set the actual supported address width to the maximum support available in IOMMU hardware. Signed-off-by: Sohil Mehta <sohil.mehta@intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel-iommu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 869f37d1f3b7..53227d6e911e 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -64,7 +64,7 @@
#define IOAPIC_RANGE_END (0xfeefffff)
#define IOVA_START_ADDR (0x1000)
-#define DEFAULT_DOMAIN_ADDRESS_WIDTH 48
+#define DEFAULT_DOMAIN_ADDRESS_WIDTH 57
#define MAX_AGAW_WIDTH 64
#define MAX_AGAW_PFN_WIDTH (MAX_AGAW_WIDTH - VTD_PAGE_SHIFT)