This practically reverts commit 2fe7aa5e4 [1].
The extra rte_bus was supposed to allow running SPDK
as a non-priviledged user by enabling RTE_IOVA_VA mode.
DPDK uses RTE_IOVA_PA by default - which means there are
physical addresses used as memseg IOVAs and hence the
root access is required to retrieve those physical
addresses. This patch was supposed to be paired with
a different DPDK patch of mine, but DPDK rejected that
one. Instead, in DPDK 18.11+ the user can force iova mode
by specifying --iova-mode=<mode> command line option,
where <mode> is either pa or va.
Either way, apparently there are cases where physical
address contiguity is required even without UIO (#707)
so let's revert this patch and consistently stick with
RTE_IOVA_PA.
SPDK requires some more effort to support running as
a non-priviledged user anyway.
Fixes#707
[1] env_dpdk/vtophys: register a fake rte_bus supporting RTE_IOVA_VA
Change-Id: I90bf097fd6a7f129444229dc7cf07a462d4f2d09
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/448121
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
07042bdeb1