linux/arch/sparc64/mm
David S. Miller c2a5a46be4 [SPARC64]: Fix for Niagara memory corruption.
On some sun4v systems, after netboot the ethernet controller and it's
DMA mappings can be left active.  The net result is that the kernel
can end up using memory the ethernet controller will continue to DMA
into, resulting in corruption.

To deal with this, we are more careful about importing IOMMU
translations which OBP has left in the IO-TLB.  If the mapping maps
into an area the firmware claimed was free and available memory for
the kernel to use, we demap instead of import that IOMMU entry.

This is going to cause the network chip to take a PCI master abort on
the next DMA it attempts, if it has been left going like this.  All
tests show that this is handled properly by the PCI layer and the e1000
drivers.

Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-23 23:15:21 -07:00
..
fault.c [SPARC64]: Document the instruction checks we do in do_sparc64_fault(). 2006-03-31 23:03:35 -08:00
generic.c [SPARC]: Respect vm_page_prot in io_remap_page_range(). 2006-03-22 01:15:13 -08:00
hugetlbpage.c [SPARC64]: Align address in huge_pte_alloc(). 2006-03-31 23:03:36 -08:00
init.c [SPARC64]: Fix for Niagara memory corruption. 2006-06-23 23:15:21 -07:00
Makefile [SPARC64]: Move away from virtual page tables, part 1. 2006-03-20 01:11:13 -08:00
tlb.c [SPARC64]: Disable preemption during flush_tlb_pending(). 2006-04-30 22:54:27 -07:00
tsb.c [SPARC64]: Add a secondary TSB for hugepage mappings. 2006-03-22 01:15:14 -08:00
ultra.S [SPARC64]: Fix new context version SMP handling. 2006-03-20 01:14:21 -08:00