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[v1,0/3] relax io barrier for aarch64 and use smp barriers for virtual pci memory

Message ID 1571758074-16445-1-git-send-email-gavin.hu@arm.com (mailing list archive)
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Gavin Hu Oct. 22, 2019, 3:27 p.m. UTC 
Armv8's peripheral coherence order is a total order on all reads and
writes to that peripheral, that makes a compiler barrier is enough for
abstracted rte io barrier.

For virtual PCI devices, the virtual device memory is actually normal
memory and the Hypervisor view of things takes precedence and they are
within a smp configuration and smp barriers should be used, the
relaxed io barrier for aarch64 becomes insufficient.

Gavin Hu (3):
  eal/arm64: relax the io barrier for aarch64
  net/virtio: virtual PCI requires smp barriers
  crypto/virtio: virtual PCI requires smp barriers

 drivers/crypto/virtio/virtio_pci.c                 | 124 ++++++++++++++++-----
 drivers/net/virtio/virtio_pci.c                    | 124 ++++++++++++++++-----
 .../common/include/arch/arm/rte_atomic_64.h        |   6 +-
 3 files changed, 191 insertions(+), 63 deletions(-)