[dpdk-dev] [PATCH] doc/guides: add info on how to enable QAT

[Thomas Monjalon]

2016-08-30 13:57, Wiles, Keith:
> > 2016-08-30 14:26, Eoin Breen:
> >> --- a/doc/guides/cryptodevs/qat.rst
> >> +++ b/doc/guides/cryptodevs/qat.rst
> >> @@ -78,6 +78,11 @@ Installation
> >> To use the DPDK QAT PMD an SRIOV-enabled QAT kernel driver is required. The
> >> VF devices exposed by this driver will be used by QAT PMD.
> >> 
> >> +To enable QAT in DPDK you must change the ./config/common_base file. Change the
> >> +line 'CONFIG_RTE_LIBRTE_PMD_QAT=n' to 'CONFIG_RTE_LIBRTE_PMD_QAT=y' to do this.
> > 
> > No, the recommended way is to change the value in the generated config
> > file (.config).
> 
> The way I have been changing the default configuration options is to copy the config/defconfig_XYZ file like defconfig_x86_64-native-linuxapp-gcc to a new name say defconfig-x86_64-qat-linuxapp-gcc. Then edit that file and add the CONFIG_RTE_LIBRTE_PMD_QAT=y to the bottom of the file. Then ‘make install T=x86_64-qat-linuxapp-gcc -j’.
> 
> Is this not a better way to build a new configuration for a specific reason?

Yes you can also build your own defconfig.
I think it is better to stick to simply change the generated file between
"make config" and "make" for the documentation.