On 03/01/2017 22:56, Ben Walker wrote:
For Linux kernel 4.0 and newer, the ability to obtain
physical page frame numbers for unprivileged users from
/proc/self/pagemap was removed. Instead, when an IOMMU
is present, simply choose our own DMA addresses instead.
Signed-off-by: Ben Walker <benjamin.wal...@intel.com>
@@ -255,6 +257,22 @@ find_physaddrs(struct hugepage_file *hugepg_tbl, struct
hugepage_info *hpi)
}
/*
+ * For each hugepage in hugepg_tbl, fill the physaddr value sequentially.
+ */
+static int
+set_physaddrs(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi)
+{
+ unsigned int i;
+ phys_addr_t addr = 0;
+
+ for (i = 0; i < hpi->num_pages[0]; i++) {
+ hugepg_tbl[i].physaddr = addr;
+ addr += hugepg_tbl[i].size;
+ }
+ return 0;
+}
+
Sorry for late catch, but when having multiple hugepage sizes, both
would be mapped from address 0.
I thin making the var static should be enough.
Also I would prefer some randomness on the start address instead of
always 0.
Thanks,
Sergio
