DPDK patches and discussions
 help / color / mirror / Atom feed
* [dpdk-dev] [PATCH v1 0/3] relax io barrier for aarch64 and use smp barriers for virtual pci memory
@ 2019-10-22 15:27 Gavin Hu
  2020-02-12  5:56 ` [dpdk-dev] [PATCH v4] net/i40e: relaxed barrier in the tx fastpath Gavin Hu
  0 siblings, 1 reply; 6+ messages in thread
From: Gavin Hu @ 2019-10-22 15:27 UTC (permalink / raw)
  To: dev
  Cc: nd, david.marchand, maxime.coquelin, tiwei.bie, thomas, rasland,
	matan, shahafs, viacheslavo, arybchenko, stephen, hemant.agrawal,
	jerinj, pbhagavatula, Honnappa.Nagarahalli, ruifeng.wang,
	phil.yang, joyce.kong, steve.capper

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(-)

-- 
2.7.4


^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2020-02-16 17:36 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <VI1PR08MB5376173EB8A8A58BC93CD2398F150@VI1PR08MB5376.eurprd08.prod.outlook.com>
2020-02-14  8:04 ` [dpdk-dev] [PATCH v4] net/i40e: relaxed barrier in the tx fastpath Gavin Hu
2019-10-22 15:27 [dpdk-dev] [PATCH v1 0/3] relax io barrier for aarch64 and use smp barriers for virtual pci memory Gavin Hu
2020-02-12  5:56 ` [dpdk-dev] [PATCH v4] net/i40e: relaxed barrier in the tx fastpath Gavin Hu
2020-02-15 15:16   ` Ye Xiaolong
2020-02-16  9:51     ` Thomas Monjalon
2020-02-16 16:38       ` Ye Xiaolong
2020-02-16 17:36         ` Thomas Monjalon

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).