On Thu, Aug 02, 2018 at 07:21:22PM +0200, Maxime Coquelin wrote:
IOTLB entries contain the host virtual address of the guest pages. When receiving a new VHOST_USER_SET_MEM_TABLE request, the previous regions get unmapped, so the IOTLB entries, if any, will be invalid. It does cause the vhost-user process to segfault.This patch introduces a new function to flush the IOTLB cache, and call it as soon as the backend handles a VHOST_USER_SET_MEM request. Fixes: 69c90e98f483 ("vhost: enable IOMMU support") Cc: [email protected] Signed-off-by: Maxime Coquelin <[email protected]> --- Changes since v1: - Fix indentation (Stephen) - Fix double iotlb-lock lock lib/librte_vhost/iotlb.c | 10 ++++++++-- lib/librte_vhost/iotlb.h | 2 +- lib/librte_vhost/vhost_user.c | 5 +++++ 3 files changed, 14 insertions(+), 3 deletions(-)
Reviewed-by: Jens Freimann <[email protected]>
