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

["Martinx - ジェームズ" <thiagocmartinsc@gmail.com>]

On 2 December 2015 at 12:05, Christian Ehrhardt
<christian.ehrhardt@canonical.com> wrote:
> 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

Hey guys,

 Is there an easy / fast fix available for this bug?

 DPDK 2.2 with Xen on 32-bit is broken now...

 If not, there will be no way to enable Xen for next Ubuntu LTS, which
is very sad...

 I have a great Xen project planned for Ubuntu 16.04 + DPDK + Xen with
DPDK Apps running on PV domUs!

Thanks!
Thiago