From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by dpdk.org (Postfix) with ESMTP id 653FA1B539; Fri, 3 Aug 2018 13:27:36 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5A4A240216F7; Fri, 3 Aug 2018 11:27:35 +0000 (UTC) Received: from localhost (dhcp-192-225.str.redhat.com [10.33.192.225]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C9C9F215670D; Fri, 3 Aug 2018 11:27:34 +0000 (UTC) Date: Fri, 3 Aug 2018 13:27:33 +0200 From: Jens Freimann To: Maxime Coquelin Cc: tiwei.bie@intel.com, zhihong.wang@intel.com, dev@dpdk.org, stable@dpdk.org Message-ID: <20180803112733.ukgxzxaxj7ght6j6@jenstp.localdomain> References: <20180802172122.25923-1-maxime.coquelin@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20180802172122.25923-1-maxime.coquelin@redhat.com> User-Agent: NeoMutt/20180716 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Fri, 03 Aug 2018 11:27:35 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Fri, 03 Aug 2018 11:27:35 +0000 (UTC) for IP:'10.11.54.6' DOMAIN:'int-mx06.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'jfreiman@redhat.com' RCPT:'' Subject: Re: [dpdk-stable] [PATCH v2] vhost: flush IOTLB cache on new mem table handling X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 03 Aug 2018 11:27:36 -0000 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: stable@dpdk.org > >Signed-off-by: Maxime Coquelin >--- >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