The introduce of virtio 1.0 support brings yet another set of ops, badly,
it's not handled correctly, that it breaks the multiple process support.
The issue is the data/function pointer may vary from different processes,
and the old used to do one time set (for primary process only). That
said, the function pointer the secondary process saw is actually from the
primary process space. Accessing it could likely result to a crash.
Kudos to the last patches, we now be able to maintain those info that may
vary among different process locally, meaning every process could have its
own copy for each of them, with the correct value set. And this is what
this patch does:
- remap the PCI (IO port for legacy device and memory map for modern
device)
- set vtpci_ops correctly
After that, multiple process would work like a charm. (At least, it
passed my fuzzy test)
Fixes: b8f04520ad ("virtio: use PCI ioport API")
Fixes: d5bbeefca8 ("virtio: introduce PCI implementation structure")
Fixes: 6ba1f63b5a ("virtio: support specification 1.0")
Cc: stable@dpdk.org
Reported-by: Juho Snellman <jsnell@iki.fi>
Reported-by: Yaron Illouz <yaroni@radcom.com>
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
6d890f8ab5