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From: Neil Horman <nhorman@tuxdriver.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH v2 2/2] acl: Preform dynamic sse4.2 support check
Date: Wed, 30 Jul 2014 10:49:29 -0400	[thread overview]
Message-ID: <1406731769-18523-3-git-send-email-nhorman@tuxdriver.com> (raw)
In-Reply-To: <1406731769-18523-1-git-send-email-nhorman@tuxdriver.com>

The ACL library relies on sse4.2 intrinsics to operate, but we don't have to
enable sse4.2 in the entire build.  Instead enable it for the ACL library alone,
and use rte_acl_create as a choke point, at which we can test for sse4.2
support, and return NULL.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Thomas Monjalon <thomas.monjalon@6wind.com>
---
 lib/librte_acl/Makefile  | 2 +-
 lib/librte_acl/rte_acl.c | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/librte_acl/Makefile b/lib/librte_acl/Makefile
index 4fe4593..3646439 100644
--- a/lib/librte_acl/Makefile
+++ b/lib/librte_acl/Makefile
@@ -35,7 +35,7 @@ include $(RTE_SDK)/mk/rte.vars.mk
 LIB = librte_acl.a
 
 CFLAGS += -O3
-CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR)
+CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) -msse4.2
 
 # all source are stored in SRCS-y
 SRCS-$(CONFIG_RTE_LIBRTE_ACL) += tb_mem.c
diff --git a/lib/librte_acl/rte_acl.c b/lib/librte_acl/rte_acl.c
index 7c288bd..37a590b 100644
--- a/lib/librte_acl/rte_acl.c
+++ b/lib/librte_acl/rte_acl.c
@@ -112,6 +112,12 @@ rte_acl_create(const struct rte_acl_param *param)
 	struct rte_acl_list *acl_list;
 	struct rte_tailq_entry *te;
 	char name[sizeof(ctx->name)];
+	
+	if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_SSE4_2)) {
+		RTE_LOG(ERR, ACL, "librte_acl requires sse4.2 instructions!\n");
+		rte_errno = EOPNOTSUPP;
+		return NULL;
+	}
 
 	/* check that we have an initialised tail queue */
 	acl_list = RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_ACL, rte_acl_list);
-- 
1.8.3.1

  parent reply	other threads:[~2014-07-30 14:48 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-07-29 20:24 [dpdk-dev] [PATCH 0/2] dpdk: Allow for dynamic enablement of some isolated features Neil Horman
2014-07-29 20:24 ` [dpdk-dev] [PATCH 1/2] ixgbe: test sse4.2 support at runtime for vectorized receive operations Neil Horman
2014-07-29 20:24 ` [dpdk-dev] [PATCH 2/2] acl: Preform dynamic sse4.2 support check Neil Horman
2014-07-30 12:07 ` [dpdk-dev] [PATCH 0/2] dpdk: Allow for dynamic enablement of some isolated features Ananyev, Konstantin
2014-07-30 13:01   ` Neil Horman
2014-07-30 13:44     ` Ananyev, Konstantin
2014-07-30 14:49 ` [dpdk-dev] [PATCH v2 " Neil Horman
2014-07-30 14:49   ` [dpdk-dev] [PATCH v2 1/2] ixgbe: test sse4.2 support at runtime for vectorized receive operations Neil Horman
2014-07-30 14:49   ` Neil Horman [this message]
2014-07-30 15:36   ` [dpdk-dev] [PATCH v2 0/2] dpdk: Allow for dynamic enablement of some isolated features Ananyev, Konstantin
2014-07-30 19:03   ` Venky Venkatesan
2014-07-30 19:17     ` Neil Horman
2014-07-30 19:34     ` Neil Horman
2014-07-30 18:59 ` [dpdk-dev] [PATCH " Bruce Richardson
2014-07-30 19:28   ` Neil Horman
2014-07-30 21:09     ` Bruce Richardson
2014-07-31  9:30       ` Thomas Monjalon
2014-07-31 11:36       ` Ananyev, Konstantin
2014-07-31 13:13       ` Neil Horman
2014-07-31 13:26         ` Thomas Monjalon
2014-07-31 14:32           ` Neil Horman
2014-07-31 18:10             ` Neil Horman
2014-07-31 18:36               ` Bruce Richardson
2014-07-31 19:01                 ` Neil Horman
2014-07-31 20:19                   ` Bruce Richardson
2014-08-01 13:36                     ` Neil Horman
2014-08-01 13:56                       ` Ananyev, Konstantin
2014-08-01 14:26                         ` Venkatesan, Venky
2014-08-01 14:27                         ` Neil Horman
2014-07-31 19:58                 ` John W. Linville
2014-07-31 20:20                   ` Bruce Richardson
2014-07-31 20:32                     ` John W. Linville
2014-08-01  8:46                       ` Vincent JARDIN
2014-08-01 14:06                         ` Neil Horman
2014-08-01 14:57                           ` Vincent JARDIN
2014-08-01 15:19                             ` Neil Horman
2014-07-31 20:10                 ` Neil Horman
2014-07-31 20:25                   ` Bruce Richardson
2014-08-01 15:06                     ` Neil Horman
2014-08-01 19:22                       ` Bruce Richardson
2014-08-01 20:43                         ` Neil Horman
2014-08-01 21:08                           ` Bruce Richardson
2014-08-02 12:56                             ` Neil Horman
2014-07-31 21:53               ` Thomas Monjalon
2014-07-31 21:25             ` Thomas Monjalon

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