On 3/4/2014 8:12 AM, Joerg Roedel wrote:
On Wed, Feb 26, 2014 at 03:49:31PM -0600, [email protected] wrote:
From: Jay Cornwall <[email protected]>
This patch corrects the PASID format in the INVALIDATE_IOTLB_PAGES
command, which was caused by incorrect information in
the AMD IOMMU Architectural Specification v2.01 document.
Incorrect format:
cmd->data[0][16:23] = PASID[7:0]
cmd->data[1][16:27] = PASID[19:8]
Correct format:
cmd->data[0][16:23] = PASID[15:8]
cmd->data[1][16:23] = PASID[7:0]
However, this does not affect the IOMMUv2 hardware implementation,
and has been corrected since version 2.02 of the specification
(available through AMD NDA).
Signed-off-by: Jay Cornwall <[email protected]>
Reviewed-by: Suravee Suthikulpanit <[email protected]>
Applied, thanks.
Does this mean that PASIDs are only 16 bits wide now from the former 20
bits?
Thank you Joerg. The specification also state that this command format
does not support the maximum size of the PASID field. However, other
commands seem to still support 20-bit PASID.
Suravee
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