Re: [PATCH v4 0/8] Introduce support for RISC-V architecture

[David Marchand <david.marchand@redhat.com>]

On Wed, Jun 8, 2022 at 10:41 AM David Marchand
<david.marchand@redhat.com> wrote:
> On Tue, May 31, 2022 at 4:14 PM Stanislaw Kardach <kda@semihalf.com> wrote:
> >
> > This patchset adds support for building and running DPDK on 64bit RISC-V
> > architecture. The initial support targets rv64gc (rv64imafdc) ISA and
> > was tested on SiFive Unmatched development board with the Freedom U740
> > SoC running Linux (freedom-u-sdk based kernel).
> > I have tested this codebase using DPDK unit and perf tests as well as
> > test-pmd, l2fwd and l3fwd examples.
> > The NIC attached to the DUT was Intel X520-DA2 which uses ixgbe PMD.
> > On the UIO side, since U740 does not have an IOMMU, I've used igb_uio,
> > uio_pci_generic and vfio-pci noiommu drivers.
> >
> > Functional verification done using meson tests. fast-tests suite passing with
> > the default config.
> >
> > PMD verification done using a Intel x520-DA2 NIC (ixgbe) and the test-pmd
> > application. Packet transfer checked using all UIO drivers available for
> > non-IOMMU platforms: uio_pci_generic, vfio-pci noiommu and igb_uio.
> >
> > The i40e PMD driver is disabled on RISC-V as the rv64gc ISA has no vector
> > operations.
> >
> > RISCV support is currently limited to Linux as the time measurement frequency
> > discovery is tied to reading a device-tree node via procfs.
> >
> > Clang compilation currently not supported due to issues with missing relocation
> > relaxation.
> >
> > Commit 1 introduces EAL and build system support for RISC-V architecture
> >    as well as documentation updates.
> > Commits 2-5 add missing defines and stubs to enable RISC-V operation in
> >    non-EAL parts.
> > Commit 6 adds RISC-V specific cpuflags test.
> > Commits 7-8 add RISC-V build testing to test-meson-builds.sh and github CI.
>
> Overall, the series lgtm.
> It did not get much reviews, but the porting is straightforward and
> clean enough.
>
> I'm waiting for some compilation to finish and I will merge it for 22.07-rc1.

Welcome to RISC-V in DPDK!

Let's work out the last details in -rc2.
Series applied, thanks.


-- 
David Marchand