From mboxrd@z Thu Jan  1 00:00:00 1970
From: Samuel Monderer <SMonderer-FQHY9aGUihGE8VeLPBfq+Q@public.gmane.org>
Subject: could not l2fwd in DOM0
Date: Tue, 29 Apr 2014 17:53:30 +0000
Message-ID: <7b60de2c2b904fe78a5ab2f73c08955f@MUC-SRV-MBX2.advaoptical.com>
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Cc: Shimon Zadok <SZadok-FQHY9aGUihGE8VeLPBfq+Q@public.gmane.org>
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Hi,

First I've encountered a compiling problem when compiling for DOM0 due to p=
rototype change of the function xen_create_contiguous_region
I made the following changes:

diff --git a/lib/librte_eal/linuxapp/xen_dom0/dom0_mm_misc.c b/lib/librte_e=
al/linuxapp/xen
index 87fa3e6..8addc21 100644
--- a/lib/librte_eal/linuxapp/xen_dom0/dom0_mm_misc.c
+++ b/lib/librte_eal/linuxapp/xen_dom0/dom0_mm_misc.c
@@ -64,6 +64,7 @@
 #include <linux/errno.h>
 #include <linux/vmalloc.h>
 #include <linux/mm.h>
+//#include <linux/types.h>

 #include <xen/xen.h>
 #include <xen/page.h>
@@ -309,6 +310,7 @@ dom0_prepare_memsegs(struct memory_info* meminfo, struc=
t dom0_mm_data
        uint64_t pfn, vstart, vaddr;
        uint32_t i, num_block, size;
        int idx;
+       dma_addr_t *dma_handle =3D NULL;

        /* Allocate 2M memory once */
        num_block =3D meminfo->size / 2;
@@ -344,7 +346,7 @@ dom0_prepare_memsegs(struct memory_info* meminfo, struc=
t dom0_mm_data
                 * contiguous physical addresses, its maximum size is 2M.
                 */
                if (xen_create_contiguous_region(mm_data->block_info[i].vir=
_addr,
-                                   DOM0_CONTIG_NUM_ORDER, 0) =3D=3D 0) {
+                                   DOM0_CONTIG_NUM_ORDER, 0, dma_handle) =
=3D=3D 0) {
                        mm_data->block_info[i].exchange_flag =3D 1;
                        mm_data->block_info[i].mfn =3D
                                pfn_to_mfn(mm_data->block_info[i].pfn);

After that I tried to run l2fwd example and got a segmentation fault

root@Smart:~/samuelm/dpdk/dpdk# modprobe uio
root@Smart:~/samuelm/dpdk/dpdk# insmod ./x86_64-default-linuxapp-gcc/kmod/i=
gb_uio.ko
root@Smart:~/samuelm/dpdk/dpdk# insmod ./x86_64-default-linuxapp-gcc/kmod/r=
te_dom0_mm.ko
root@Smart:~/samuelm/dpdk/dpdk# cd examples/l2fwd/build/
root@Smart:~/samuelm/dpdk/dpdk/examples/l2fwd/build# echo 2048 > /sys/kerne=
l/mm/dom0-mm/memsize-mB/memsize
root@Smart:~/samuelm/dpdk/dpdk/examples/l2fwd/build# ./l2fwd -c 3 -n 4 --xe=
n-dom0 -- -q 1 -p 3
EAL: Detected lcore 0 as core 0 on socket 0
EAL: Detected lcore 1 as core 0 on socket 0
EAL: Setting up memory...
Segmentation fault
root@Smart:~/samuelm/dpdk/dpdk/examples/l2fwd/build#

Has anyone already encountered this problem?

Samuelm