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iommu/vt-d: Add a check for 1GB page support

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Add a check to verify IOMMU 1GB page support. If the CPU supports 1GB
pages but the IOMMU does not support it then disable SVM by not
allocating PASID tables.

Signed-off-by: Sohil Mehta <sohil.mehta@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Sohil Mehta 2017-12-20 11:59:25 -08:00 • committed by Joerg Roedel
parent 5e3b4a15dd
commit 59103caa68
2 changed files with 5 additions and 0 deletions
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1
include/linux/intel-iommu.h
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@ -84,6 +84,7 @@
* Decoding Capability Register
*/
#define cap_pi_support(c) (((c) >> 59) & 1)
#define cap_fl1gp_support(c) (((c) >> 56) & 1)
#define cap_read_drain(c) (((c) >> 55) & 1)
#define cap_write_drain(c) (((c) >> 54) & 1)
#define cap_max_amask_val(c) (((c) >> 48) & 0x3f)