From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 9A345A09DE; Fri, 13 Nov 2020 12:12:58 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 763B5C91C; Fri, 13 Nov 2020 12:10:23 +0100 (CET) Received: from lb.pantheon.sk (lb.pantheon.sk [46.229.239.20]) by dpdk.org (Postfix) with ESMTP id 76634C8D4; Fri, 13 Nov 2020 12:10:09 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by lb.pantheon.sk (Postfix) with ESMTP id ED52DB9979; Fri, 13 Nov 2020 12:10:06 +0100 (CET) X-Virus-Scanned: amavisd-new at siecit.sk Received: from lb.pantheon.sk ([127.0.0.1]) by localhost (lb.pantheon.sk [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8q8gcrfAo-D1; Fri, 13 Nov 2020 12:10:05 +0100 (CET) Received: from service-node1.lab.pantheon.local (unknown [46.229.239.141]) by lb.pantheon.sk (Postfix) with ESMTP id 4F0A8B9978; Fri, 13 Nov 2020 12:09:57 +0100 (CET) From: =?UTF-8?q?Juraj=20Linke=C5=A1?= To: bruce.richardson@intel.com, Ruifeng.Wang@arm.com, Honnappa.Nagarahalli@arm.com, Phil.Yang@arm.com, vcchunga@amazon.com, Dharmik.Thakkar@arm.com, jerinjacobk@gmail.com, hemant.agrawal@nxp.com, ajit.khaparde@broadcom.com, ferruh.yigit@intel.com Cc: dev@dpdk.org, Ruifeng Wang , stable@dpdk.org Date: Fri, 13 Nov 2020 12:09:42 +0100 Message-Id: <1605265789-12932-9-git-send-email-juraj.linkes@pantheon.tech> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1605265789-12932-1-git-send-email-juraj.linkes@pantheon.tech> References: <1605100718-7991-1-git-send-email-juraj.linkes@pantheon.tech> <1605265789-12932-1-git-send-email-juraj.linkes@pantheon.tech> Subject: [dpdk-dev] [PATCH v10 08/15] eal/arm: fix clang build of native target 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" From: Ruifeng Wang When doing Clang build with '-mcpu=native' on N1 platform, build failed with: ../lib/librte_eal/arm/include/rte_atomic_64.h:76:39: error: instruction requires: lse __ATOMIC128_CAS_OP(__cas_128_release, "caspl") This is because native detection for Neoverse N1 was added in Clang-11. Prior version of Clang's assembler doesn't know LSE support on hardware. Fixed this for Clang earlier than version 11 by specifying architecture for assembler. Referred to [1] for this fix. Fixes: 7e2c3e17fe2c ("eal/arm64: add 128-bit atomic compare exchange") Cc: stable@dpdk.org [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e0d5896bd356cd577f9710a02d7a474cdf58426b Signed-off-by: Ruifeng Wang --- lib/librte_eal/arm/include/rte_atomic_64.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/librte_eal/arm/include/rte_atomic_64.h b/lib/librte_eal/arm/include/rte_atomic_64.h index 2cef88629..7fcd17466 100644 --- a/lib/librte_eal/arm/include/rte_atomic_64.h +++ b/lib/librte_eal/arm/include/rte_atomic_64.h @@ -46,6 +46,8 @@ rte_atomic_thread_fence(int memorder) /*------------------------ 128 bit atomic operations -------------------------*/ #if defined(__ARM_FEATURE_ATOMICS) || defined(RTE_ARM_FEATURE_ATOMICS) +#define __LSE_PREAMBLE ".arch armv8-a+lse\n" + #define __ATOMIC128_CAS_OP(cas_op_name, op_string) \ static __rte_noinline rte_int128_t \ cas_op_name(rte_int128_t *dst, rte_int128_t old, rte_int128_t updated) \ @@ -59,6 +61,7 @@ cas_op_name(rte_int128_t *dst, rte_int128_t old, rte_int128_t updated) \ register uint64_t x2 __asm("x2") = (uint64_t)updated.val[0]; \ register uint64_t x3 __asm("x3") = (uint64_t)updated.val[1]; \ asm volatile( \ + __LSE_PREAMBLE \ op_string " %[old0], %[old1], %[upd0], %[upd1], [%[dst]]" \ : [old0] "+r" (x0), \ [old1] "+r" (x1) \ @@ -76,6 +79,7 @@ __ATOMIC128_CAS_OP(__cas_128_acquire, "caspa") __ATOMIC128_CAS_OP(__cas_128_release, "caspl") __ATOMIC128_CAS_OP(__cas_128_acq_rel, "caspal") +#undef __LSE_PREAMBLE #undef __ATOMIC128_CAS_OP #endif -- 2.20.1