ehea: Detect 16GB hugepages for firmware restriction

All kernel memory which is used for kernel/hardware data transfer must
be registered with firmware using "memory regions". 16GB hugepages
may not be part of a memory region due to firmware restrictions.
This patch modifies the walk_memory_resource callback fn to filter
hugepages and add only standard memory to the busmap which is later
on used for MR registration.

Signed-off-by: Thomas Klein <tklein@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/ehea/ehea_qmr.h b/drivers/net/ehea/ehea_qmr.h
index 1e58dc06b7d2..0817c1e74a19 100644
--- a/drivers/net/ehea/ehea_qmr.h
+++ b/drivers/net/ehea/ehea_qmr.h
@@ -40,6 +40,9 @@
 #define EHEA_PAGESIZE          (1UL << EHEA_PAGESHIFT)
 #define EHEA_SECTSIZE          (1UL << 24)
 #define EHEA_PAGES_PER_SECTION (EHEA_SECTSIZE >> EHEA_PAGESHIFT)
+#define EHEA_HUGEPAGESHIFT     34
+#define EHEA_HUGEPAGE_SIZE     (1UL << EHEA_HUGEPAGESHIFT)
+#define EHEA_HUGEPAGE_PFN_MASK ((EHEA_HUGEPAGE_SIZE - 1) >> PAGE_SHIFT)
 
 #if ((1UL << SECTION_SIZE_BITS) < EHEA_SECTSIZE)
 #error eHEA module cannot work if kernel sectionsize < ehea sectionsize