Re: [dpdk-dev] [PATCH v1 0/5] clean-up cpuflags

[Jerin Jacob <jerin.jacob@caviumnetworks.com>]

On Tue, Feb 02, 2016 at 11:59:48PM +0100, Thomas Monjalon wrote:
> Following the work of Ferruh, I suggest this cleanup to remove as much
> as possible of the code from the cpuflags headers.
> The goal is to un-inline these functions (not performance sensitive)
> and remove the CPU flags table from the ABI (just added recently).
> The bonus is to stop mimic x86 in ARM and PPC implementations.
> 
> WARNING: it has not been tested nor compiled on Tilera, ARM and POWER8.
> Please help, thank you.

compilation errors on arm64 too.

arm64 toolchains are publicly available @
http://releases.linaro.org/14.11/components/toolchain/binaries/aarch64-linux-gnu/

➜ [master] thunderx  [dpdk-master] $ make
== Build lib
== Build lib/librte_compat
== Build lib/librte_eal
== Build lib/librte_eal/common
== Build lib/librte_eal/linuxapp
== Build lib/librte_eal/linuxapp/igb_uio
(cat /dev/null;   echo
kernel//home/jerin/dpdk-master/build/build/lib/librte_eal/linuxapp/igb_uio/igb_uio.ko;)
> /home/jerin/dpdk-master/build/build/lib/librte_eal/linuxapp/igb_uio/modules.order
  Building modules, stage 2.
  MODPOST 1 modules
== Build lib/librte_eal/linuxapp/eal
  CC rte_cpuflags.o
/home/jerin/dpdk-master/lib/librte_eal/common/arch/arm/rte_cpuflags.c:83:20:
error: ‘REG_PLATFORM’ undeclared here (not in a function)
  FEAT_DEF(AARCH64, REG_PLATFORM, 1)
                    ^
/home/jerin/dpdk-master/lib/librte_eal/common/arch/arm/rte_cpuflags.c:71:26:
note: in definition of macro ‘FEAT_DEF’
  [RTE_CPUFLAG_##name] = {reg, bit, #name},
                          ^
/home/jerin/dpdk-master/lib/librte_eal/common/arch/arm/rte_cpuflags.c:
In function ‘rte_cpu_get_features’:
/home/jerin/dpdk-master/lib/librte_eal/common/arch/arm/rte_cpuflags.c:144:8:
error: array subscript is not an integer
     out[REG_PLATFORM] = 0x0001;
        ^
/home/jerin/dpdk-master/lib/librte_eal/common/arch/arm/rte_cpuflags.c:144:5:
error: statement with no effect [-Werror=unused-value]
     out[REG_PLATFORM] = 0x0001;
     ^
cc1: all warnings being treated as errors
/home/jerin/dpdk-master/mk/internal/rte.compile-pre.mk:126: recipe for
target 'rte_cpuflags.o' failed
make[5]: *** [rte_cpuflags.o] Error 1
/home/jerin/dpdk-master/mk/rte.subdir.mk:61: recipe for target 'eal'
failed
make[4]: *** [eal] Error 2
/home/jerin/dpdk-master/mk/rte.subdir.mk:61: recipe for target
'linuxapp' failed
make[3]: *** [linuxapp] Error 2
/home/jerin/dpdk-master/mk/rte.subdir.mk:61: recipe for target
'librte_eal' failed
make[2]: *** [librte_eal] Error 2
/home/jerin/dpdk-master/mk/rte.sdkbuild.mk:77: recipe for target 'lib'
failed
make[1]: *** [lib] Error 2
/home/jerin/dpdk-master/mk/rte.sdkroot.mk:123: recipe for target 'all'
failed
make: *** [all] Error 2


> 
> Thomas Monjalon (5):
>   eal: get CPU flag name
>   eal: move CPU flag functions out of headers
>   eal/arm: adapt CPU flags check to the arch
>   eal/ppc: adapt CPU flags check to the arch
>   eal: remove compiler optimization workaround
> 
>  app/test/test_hash_scaling.c                       |   2 +
>  lib/librte_eal/bsdapp/eal/rte_eal_version.map      |   2 +-
>  lib/librte_eal/common/arch/arm/rte_cpuflags.c      | 170 ++++++++++++++++-----
>  lib/librte_eal/common/arch/ppc_64/rte_cpuflags.c   | 145 +++++++++++++-----
>  lib/librte_eal/common/arch/tile/rte_cpuflags.c     |  11 ++
>  lib/librte_eal/common/arch/x86/rte_cpuflags.c      |  91 +++++++++++
>  lib/librte_eal/common/eal_common_cpuflags.c        |  18 +--
>  .../common/include/arch/arm/rte_cpuflags_32.h      |  78 ----------
>  .../common/include/arch/arm/rte_cpuflags_64.h      |  79 ----------
>  .../common/include/arch/ppc_64/rte_cpuflags.h      |  64 --------
>  .../common/include/arch/tile/rte_cpuflags.h        |  29 ----
>  .../common/include/arch/x86/rte_cpuflags.h         |  66 --------
>  .../common/include/generic/rte_cpuflags.h          |  56 ++-----
>  lib/librte_eal/linuxapp/eal/rte_eal_version.map    |   3 +-
>  14 files changed, 364 insertions(+), 450 deletions(-)
> 
> -- 
> 2.5.2
>