[dpdk-dev] building LIBRTE_PMD_XENVIRT in 32bit triggers some errors

[Christian Ehrhardt <christian.ehrhardt@canonical.com>]

Hi,
just FYI - building LIBRTE_PMD_XENVIRT in 32bit triggers some errors.

I don't know if that part of the tree is actively maintained - It is
default off, in the config template config/common_linuxapp.

I'm not even entirely sure if  LIBRTE_PMD_XENVIRT is still required.
I guess in the Dom0 you can go with uio-pci-generic these days, not
sure about para-virtual guests.

Anyway I thought it might be worth to at least report.

== Build drivers/net/xenvirt
gcc -Wp,-MD,./.rte_eth_xenvirt.o.d.tmp -m32 -pthread -fPIC
-march=native -DRTE_MACHINE_CPUFLAG_SSE -DRTE_MACHINE_CPUFLAG_SSE2
-DRTE_MACHINE_CPUFLAG_SSE3 -DRTE_MACHINE_CPUFLAG_SSSE3
-DRTE_MACHINE_CPUFLAG_SSE4_1 -DRTE_MACHINE_CPUFLAG_SSE4_2
-DRTE_MACHINE_CPUFLAG_AES -DRTE_MACHINE_CPUFLAG_PCLMULQDQ
-DRTE_MACHINE_CPUFLAG_AVX
-DRTE_COMPILE_TIME_CPUFLAGS=RTE_CPUFLAG_SSE,RTE_CPUFLAG_SSE2,RTE_CPUFLAG_SSE3,RTE_CPUFLAG_SSSE3,RTE_CPUFLAG_SSE4_1,RTE_CPUFLAG_SSE4_2,RTE_CPUFLAG_AES,RTE_CPUFLAG_PCLMULQDQ,RTE_CPUFLAG_AVX
 -I/home/ubuntu/dpdk-2.2.0-rc2/build/include -include
/home/ubuntu/dpdk-2.2.0-rc2/build/include/rte_config.h -O3 -W -Wall
-Werror -Wstrict-prototypes -Wmissing-prototypes
-Wmissing-declarations -Wold-style-definition -Wpointer-arith
-Wcast-align -Wnested-externs -Wcast-qual -Wformat-nonliteral
-Wformat-security -Wundef -Wwrite-strings   -o rte_eth_xenvirt.o -c
/home/ubuntu/dpdk-2.2.0-rc2/drivers/net/xenvirt/rte_eth_xenvirt.c
In file included from
/home/ubuntu/dpdk-2.2.0-rc2/drivers/net/xenvirt/rte_eth_xenvirt.c:61:0:
/home/ubuntu/dpdk-2.2.0-rc2/drivers/net/xenvirt/virtqueue.h: In
function ‘virtqueue_enqueue_recv_refill’:
/home/ubuntu/dpdk-2.2.0-rc2/drivers/net/xenvirt/virtqueue.h:201:15:
error: cast from pointer to integer of different size
[-Werror=pointer-to-int-cast]
   (uint64_t) ((uint64_t)cookie->buf_addr + RTE_PKTMBUF_HEADROOM -
sizeof(struct virtio_net_hdr));
               ^
In file included from
/home/ubuntu/dpdk-2.2.0-rc2/drivers/net/xenvirt/rte_eth_xenvirt.c:51:0:
/home/ubuntu/dpdk-2.2.0-rc2/drivers/net/xenvirt/virtqueue.h: In
function ‘virtqueue_enqueue_xmit’:
/home/ubuntu/dpdk-2.2.0-rc2/build/include/rte_mbuf.h:1617:3: error:
cast from pointer to integer of different size
[-Werror=pointer-to-int-cast]
  ((t)((char *)(m)->buf_addr + (m)->data_off + (o)))
   ^
/home/ubuntu/dpdk-2.2.0-rc2/build/include/rte_mbuf.h:1631:32: note: in
expansion of macro ‘rte_pktmbuf_mtod_offset’
 #define rte_pktmbuf_mtod(m, t) rte_pktmbuf_mtod_offset(m, t, 0)
                                ^
/home/ubuntu/dpdk-2.2.0-rc2/drivers/net/xenvirt/virtqueue.h:58:2:
note: in expansion of macro ‘rte_pktmbuf_mtod’
  rte_pktmbuf_mtod(mb, uint64_t)
  ^
/home/ubuntu/dpdk-2.2.0-rc2/drivers/net/xenvirt/virtqueue.h:241:24:
note: in expansion of macro ‘RTE_MBUF_DATA_DMA_ADDR’
  start_dp[idx].addr  = RTE_MBUF_DATA_DMA_ADDR(cookie);
                        ^
cc1: all warnings being treated as errors
/home/ubuntu/dpdk-2.2.0-rc2/mk/internal/rte.compile-pre.mk:126: recipe
for target 'rte_eth_xenvirt.o' failed
make[4]: *** [rte_eth_xenvirt.o] Error 1
/home/ubuntu/dpdk-2.2.0-rc2/mk/rte.subdir.mk:61: recipe for target
'xenvirt' failed
make[3]: *** [xenvirt] Error 2
/home/ubuntu/dpdk-2.2.0-rc2/mk/rte.subdir.mk:61: recipe for target 'net' failed
make[2]: *** [net] Error 2
/home/ubuntu/dpdk-2.2.0-rc2/mk/rte.sdkbuild.mk:93: recipe for target
'drivers' failed
make[1]: *** [drivers] Error 2
/home/ubuntu/dpdk-2.2.0-rc2/mk/rte.sdkroot.mk:124: recipe for target
'all' failed
make: *** [all] Error 2

Christian Ehrhardt
Software Engineer, Ubuntu Server
Canonical Ltd