On 1 September 2017 at 18:21, Eric Auger <eric.au...@redhat.com> wrote: > SMMUV3 does not support any IOVA range TLBI command: > SMMU_CMD_TLBI_NH_VA invalidates TLB entries by page. > That's an issue when running DPDK on guest. DPDK uses > hugepages but each time a hugepage is mapped on guest side, > a storm of SMMU_CMD_TLBI_NH_VA commands get sent by the > guest smmuv3 driver and trapped by QEMU for VFIO replay. > > Let's get prepared to handle implementation defined commands, > SMMU_CMD_TLBI_NH_VA_VM, which invalidate a range of IOVAs. > > Upon this command, we notify the whole range in one host. > > Signed-off-by: Eric Auger <eric.au...@redhat.com>
Definite NACK for this, I'm afraid. We should emulate the hardware, not new things of our own devising. thanks -- PMM
