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From: Stephen Hemminger <stephen@networkplumber.org>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH 1/2] virtio: initialize iopl when device is initialized
Date: Thu,  5 Mar 2015 16:45:25 -0800
Message-ID: <1425602726-26538-2-git-send-email-stephen@networkplumber.org> (raw)
In-Reply-To: <1425602726-26538-1-git-send-email-stephen@networkplumber.org>

The virtio driver needs to use in/out instructions therefore it
must initialize using iopl(2) system call. The problem is that
virtio initialization happens very early, and any application
that uses daemon() or calls eal_init later in another context
will fail.

The fix is to move the iopl into rte_eal_init.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 lib/librte_eal/linuxapp/eal/eal.c     | 5 +++++
 lib/librte_pmd_virtio/virtio_ethdev.c | 5 -----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index 16f9e7c..76481f7 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -764,6 +764,11 @@ rte_eal_init(int argc, char **argv)
 		rte_panic("Cannot init IVSHMEM\n");
 #endif
 
+#ifdef RTE_LIBRTE_VIRTIO_PMD
+	if (rte_eal_iopl_init() != 0)
+		rte_panic("IOPL call failed - cannot use virtio PMD");
+#endif
+
 	if (rte_eal_memory_init() < 0)
 		rte_panic("Cannot init memory\n");
 
diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c b/lib/librte_pmd_virtio/virtio_ethdev.c
index d239083..e2600de 100644
--- a/lib/librte_pmd_virtio/virtio_ethdev.c
+++ b/lib/librte_pmd_virtio/virtio_ethdev.c
@@ -1247,11 +1247,6 @@ static int
 rte_virtio_pmd_init(const char *name __rte_unused,
 		    const char *param __rte_unused)
 {
-	if (rte_eal_iopl_init() != 0) {
-		PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
-		return -1;
-	}
-
 	rte_eth_driver_register(&rte_virtio_pmd);
 	return 0;
 }
-- 
2.1.4

  reply	other threads:[~2015-03-06  0:45 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-06  0:45 [dpdk-dev] [PATCH 0/2] virtio: bugfixes Stephen Hemminger
2015-03-06  0:45 ` Stephen Hemminger [this message]
2015-03-06  3:41   ` [dpdk-dev] [PATCH 1/2] virtio: initialize iopl when device is initialized Ouyang, Changchun
2015-03-06 16:20     ` Stephen Hemminger
2015-03-06 16:33       ` David Marchand
2015-03-06 16:55         ` Stephen Hemminger
2015-03-06 22:04           ` David Marchand
2015-03-06 23:43             ` Stephen Hemminger
2015-03-07  6:53               ` David Marchand
2015-03-09 11:05       ` David Marchand
2015-03-09 14:56         ` [dpdk-dev] [PATCH 0/2] fix virtio interrupt handling David Marchand
2015-03-09 14:56           ` [dpdk-dev] [PATCH 1/2] eal/linux: move plugin load to very start of eal init David Marchand
2015-03-09 15:21             ` Neil Horman
     [not found]               ` <CALwxeUs4hPbYDPBUfz9u2AoiCoj_wwTsAyj=_1xxzuT6LLW6nw@mail.gmail.com>
2015-03-10 10:55                 ` Neil Horman
2015-10-14  0:05                   ` Stephen Hemminger
2015-10-14  9:55                     ` David Marchand
2015-03-09 14:56           ` [dpdk-dev] [PATCH 2/2] virtio: change io privilege level as early as possible David Marchand
2015-03-10 13:14             ` Neil Horman
2015-09-29 19:25               ` Stephen Hemminger
2015-09-30  8:28                 ` David Marchand
2015-09-30 14:52                   ` Neil Horman
2015-09-30 15:37                     ` Thomas Monjalon
2015-09-30 17:26                       ` Stephen Hemminger
2015-10-01 11:25                       ` Neil Horman
2015-10-12 20:08                         ` Stephen Hemminger
2015-10-14  0:07                         ` Stephen Hemminger
2015-10-14  8:00                           ` David Marchand
2015-10-14  9:49                             ` David Marchand
2015-10-14  9:50                               ` [dpdk-dev] [PATCH] eal: move interrupt init after device init David Marchand
2015-10-14 11:32                                 ` David Marchand
2015-10-20 21:22                                   ` Thomas Monjalon
2015-07-29 17:26       ` [dpdk-dev] [PATCH 1/2] virtio: initialize iopl when device is initialized Thomas Monjalon
2015-03-06  0:45 ` [dpdk-dev] [PATCH 2/2] virtio: allow running w/o vlan filtering Stephen Hemminger
2015-03-06  3:39   ` Ouyang, Changchun
2015-03-06 16:24     ` Stephen Hemminger
2015-07-29 12:56       ` Thomas Monjalon
2015-07-30  1:23         ` Ouyang, Changchun
2015-08-04 12:51         ` Vincent JARDIN
2015-08-05  1:01           ` Ouyang, Changchun
2015-08-05  1:22             ` Stephen Hemminger
2015-08-05 10:49             ` Vincent JARDIN
2015-10-21 13:58               ` Thomas Monjalon
2017-02-15  8:38                 ` Thomas Monjalon

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