[PATCH v4 0/4] Support VFIO sparse mmap in PCI bus

[Patrick Robb]

On Thu, Jun 8, 2023 at 3:03 AM David Marchand <david.marchand at redhat.com>
wrote:

> Hello Chenbo, Patrick,
>
>
> On Thu, Jun 8, 2023 at 8:50 AM Xia, Chenbo <chenbo.xia at intel.com> wrote:
> > > > This series introduces a VFIO standard capability, called sparse
> > > > mmap to PCI bus. In linux kernel, it's defined as
> > > > VFIO_REGION_INFO_CAP_SPARSE_MMAP. Sparse mmap means instead of
> > > > mmap whole BAR region into DPDK process, only mmap part of the
> > > > BAR region after getting sparse mmap information from kernel.
> > > > For the rest of BAR region that is not mmap-ed, DPDK process
> > > > can use pread/pwrite system calls to access. Sparse mmap is
> > > > useful when kernel does not want userspace to mmap whole BAR
> > > > region, or kernel wants to control over access to specific BAR
> > > > region. Vendors can choose to enable this feature or not for
> > > > their devices in their specific kernel modules.
> > > >
> > >
> > > Hello,
> > >
> > > I see the build failure Patrick reported as well and can confirm it's
> > > caused by 095cf6e68b28 ("bus/pci: introduce MMIO read/write").
> > > Bugzilla ticket: https://bugs.dpdk.org/show_bug.cgi?id=1245
> >
> > Thanks Ali. I just read the bz and understand what's missing. I will send
> > a patch today.
> >
> > But since last time CI is not reporting the error, this time how could I
> make
> > sure the fix will perfectly work?
>
> Chenbo,
>
> In theory, this error should have been reported so go ahead and post your
> fix.
>
> Patrick,
>
> This missing report could be a mail delivery issue (I can see the test
> ran at UNH).
> I see no trace in test-report ml.
> Can you look at the reason?
>
> Thanks.
>
>
> --
> David Marchand
>
>
I see where the issue is in our reporting process for the windows results
and I will resolve it after the CI meeting this morning. Sorry everyone for
the oversight.
-- 

Patrick Robb

Technical Service Manager

UNH InterOperability Laboratory

21 Madbury Rd, Suite 100, Durham, NH 03824

www.iol.unh.edu
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