Hey Raj,
Let us know if you need help in gathering more debugging information. For
the time being we've decided to ERRATA the use of the Intel I/O MMU with
IPsec till we Root Cause the issue. But this is still at the top of Harsh's
bug list.
With Robin's comments, I'm almost sure that the:
(iov_pfn + sg->offset) << VTD_PAGE_SHIFT)
in your suggested patch is an issue. iov_pfn is a Page Frame Number and
sg->offset is a Byte Offset. It feels like this should be:
size_t page_off = sg->offset & ~VTD_PAGE_MASK;
unsigned long pfn_off = sg->offset >> VTD_PAGE_MASK;
...
sg->dma_address = ((dma_addr_t)
(iov_pfn + pfn_off) << VTD_PAGE_SHIFT) + page_off;
When Harsh tried your original patch, Harsh' test system wouldn't even boot.
Casey
