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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: dev@dpdk.org, tiwei.bie@intel.com, zhihong.wang@intel.com,
	jfreimann@redhat.com, nicknickolaev@gmail.com,
	i.maximets@samsung.com, bruce.richardson@intel.com,
	alejandro.lucero@netronome.com
Cc: dgilbert@redhat.com, stable@dpdk.org,
	Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [PATCH v2 08/17] vhost: add config flag for postcopy feature
Date: Tue,  2 Oct 2018 11:36:42 +0200	[thread overview]
Message-ID: <20181002093651.24795-9-maxime.coquelin@redhat.com> (raw)
In-Reply-To: <20181002093651.24795-1-maxime.coquelin@redhat.com>

Postcopy live-migration features relies on userfaultfd,
which was only introduced in kernel v4.3.

This patch introduces a new define to allow building vhost
library on kernels not supporting userfaultfd.

With legacy build system, user has to explicitly set
CONFIG_RTE_LIBRTE_VHOST_POSTCOPY to 'y'.

With Meson build system, RTE_LIBRTE_VHOST_POSTCOPY gets
automatically defined if userfaultfd kernel header is
present.

Suggested-by: Ilya Maximets <i.maximets@samsung.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 config/common_linuxapp       | 1 +
 lib/librte_vhost/meson.build | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/config/common_linuxapp b/config/common_linuxapp
index 9c5ea9d89..dc43dcc36 100644
--- a/config/common_linuxapp
+++ b/config/common_linuxapp
@@ -14,6 +14,7 @@ CONFIG_RTE_LIBRTE_KNI=y
 CONFIG_RTE_LIBRTE_PMD_KNI=y
 CONFIG_RTE_LIBRTE_VHOST=y
 CONFIG_RTE_LIBRTE_VHOST_NUMA=y
+CONFIG_RTE_LIBRTE_VHOST_POSTCOPY=n
 CONFIG_RTE_LIBRTE_PMD_VHOST=y
 CONFIG_RTE_LIBRTE_IFC_PMD=y
 CONFIG_RTE_LIBRTE_PMD_AF_PACKET=y
diff --git a/lib/librte_vhost/meson.build b/lib/librte_vhost/meson.build
index 9d25b4d88..e33e6fc16 100644
--- a/lib/librte_vhost/meson.build
+++ b/lib/librte_vhost/meson.build
@@ -7,6 +7,8 @@ endif
 if has_libnuma == 1
 	dpdk_conf.set10('RTE_LIBRTE_VHOST_NUMA', true)
 endif
+dpdk_conf.set('RTE_LIBRTE_VHOST_POSTCOPY',
+	      cc.has_header('linux/userfaultfd.h'))
 version = 4
 allow_experimental_apis = true
 cflags += '-fno-strict-aliasing'
-- 
2.17.1

  parent reply	other threads:[~2018-10-02  9:36 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-02  9:36 [PATCH v2 00/17] vhost: add postcopy live-migration support Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 01/17] vhost: fix messages error checks Maxime Coquelin
2018-10-02 14:15   ` Ilya Maximets
2018-10-03  7:50     ` Maxime Coquelin
2018-10-03  7:57       ` Ilya Maximets
2018-10-03  8:02         ` Maxime Coquelin
2018-10-03  8:32           ` Ilya Maximets
2018-10-03  9:07             ` Ilya Maximets
2018-10-03 14:39               ` Maxime Coquelin
2018-10-04  5:42                 ` Ilya Maximets
2018-10-02  9:36 ` [PATCH v2 02/17] vhost: fix return code of messages requiring replies Maxime Coquelin
2018-10-03 13:26   ` Ilya Maximets
2018-10-03 14:49     ` Maxime Coquelin
2018-10-04  5:49       ` Ilya Maximets
2018-10-02  9:36 ` [PATCH v2 03/17] vhost: fix error handling when mem table gets updated Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 04/17] vhost: define postcopy protocol flag Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 05/17] vhost: add number of fds to vhost-user messages and use it Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 06/17] vhost: pass socket fd to message handling callbacks Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 07/17] vhost: enable fds passing when sending vhost-user messages Maxime Coquelin
2018-10-02  9:36 ` Maxime Coquelin [this message]
2018-10-02  9:36 ` [PATCH v2 09/17] vhost: introduce postcopy's advise message Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 10/17] vhost: add support for postcopy's listen message Maxime Coquelin
2018-10-02 14:11   ` Ilya Maximets
2018-10-03  7:46     ` Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 11/17] vhost: register new regions with userfaultfd Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 12/17] vhost: avoid useless VhostUserMemory copy Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 13/17] vhost: send userfault range addresses back to qemu Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 14/17] vhost: add support to postcopy's end request Maxime Coquelin
2018-10-02 14:18   ` Ilya Maximets
2018-10-02  9:36 ` [PATCH v2 15/17] vhost: enable postcopy protocol feature Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 16/17] vhost: add flag to enable postcopy live-migration Maxime Coquelin
2018-10-02  9:36 ` [PATCH v2 17/17] net/vhost: add parameter to enable postcopy support Maxime Coquelin

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