From patchwork Tue Feb 28 18:52:55 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aaron Conole X-Patchwork-Id: 20948 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id 6C053F618; Tue, 28 Feb 2017 19:54:10 +0100 (CET) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 69AD32BB2 for ; Tue, 28 Feb 2017 19:53:21 +0100 (CET) Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E147E7E9D4; Tue, 28 Feb 2017 18:53:21 +0000 (UTC) Received: from dhcp-25-97.bos.redhat.com ([10.18.25.172]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v1SIrHWI019326; Tue, 28 Feb 2017 13:53:21 -0500 From: Aaron Conole To: dev@dpdk.org Cc: Stephen Hemminger , Bruce Richardson Date: Tue, 28 Feb 2017 13:52:55 -0500 Message-Id: <20170228185315.12546-7-aconole@redhat.com> In-Reply-To: <20170228185315.12546-1-aconole@redhat.com> References: <20170227161811.12309-1-aconole@redhat.com> <20170228185315.12546-1-aconole@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Tue, 28 Feb 2017 18:53:21 +0000 (UTC) Subject: [dpdk-dev] [PATCH v6 06/26] eal-common: introduce a way to query cpu support X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This adds a new API to check for the eal cpu versions. Signed-off-by: Aaron Conole Acked-by: Bruce Richardson --- lib/librte_eal/common/eal_common_cpuflags.c | 13 +++++++++++-- lib/librte_eal/common/include/generic/rte_cpuflags.h | 8 ++++++++ 2 files changed, 19 insertions(+), 2 deletions(-) diff --git a/lib/librte_eal/common/eal_common_cpuflags.c b/lib/librte_eal/common/eal_common_cpuflags.c index b5f76f7..9a2d080 100644 --- a/lib/librte_eal/common/eal_common_cpuflags.c +++ b/lib/librte_eal/common/eal_common_cpuflags.c @@ -43,6 +43,13 @@ void rte_cpu_check_supported(void) { + if (!rte_cpu_is_supported()) + exit(1); +} + +int +rte_cpu_is_supported(void) +{ /* This is generated at compile-time by the build system */ static const enum rte_cpu_flag_t compile_time_flags[] = { RTE_COMPILE_TIME_CPUFLAGS @@ -57,14 +64,16 @@ rte_cpu_check_supported(void) fprintf(stderr, "ERROR: CPU feature flag lookup failed with error %d\n", ret); - exit(1); + return 0; } if (!ret) { fprintf(stderr, "ERROR: This system does not support \"%s\".\n" "Please check that RTE_MACHINE is set correctly.\n", rte_cpu_get_flag_name(compile_time_flags[i])); - exit(1); + return 0; } } + + return 1; } diff --git a/lib/librte_eal/common/include/generic/rte_cpuflags.h b/lib/librte_eal/common/include/generic/rte_cpuflags.h index 71321f3..8d27031 100644 --- a/lib/librte_eal/common/include/generic/rte_cpuflags.h +++ b/lib/librte_eal/common/include/generic/rte_cpuflags.h @@ -82,4 +82,12 @@ rte_cpu_get_flag_enabled(enum rte_cpu_flag_t feature); void rte_cpu_check_supported(void); +/** + * This function checks that the currently used CPU supports the CPU features + * that were specified at compile time. It is called automatically within the + * EAL, so does not need to be used by applications. This version returns a + * result so that decisions may be made (for instance, graceful shutdowns). + */ +int +rte_cpu_is_supported(void); #endif /* _RTE_CPUFLAGS_H_ */