RE: [PATCH 4/4] iommu: Add domain window handling functions

-Original Message- From: Joerg Roedel [mailto:j...@8bytes.org] Sent: Thursday, January 31, 2013 3:14 AM To: Sethi Varun-B16395 Cc: iommu@lists.linux-foundation.org; linux-ker...@vger.kernel.org; Joerg Roedel Subject: [PATCH 4/4] iommu: Add domain window handling functions Add

IO_PAGE_FAULTs on unity mapped regions during amd_iommu_init() in Linux 3.4

Joerg, I am seeing IO_PAGE_FAULTs on AMD system running releases prior to 3.7. I focused my debug and testing on 3.4. I am hoping to find a solution for this problem in 3.4. I don't see any IO_PAGE_FAULTs with 3.7 and later releases on this system. On this system BIOS specifies Unity mapped