From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A343C433E6 for ; Tue, 14 Jul 2020 03:04:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5319221D95 for ; Tue, 14 Jul 2020 03:04:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=efficios.com header.i=@efficios.com header.b="ogOQpKRj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726894AbgGNDEA (ORCPT ); Mon, 13 Jul 2020 23:04:00 -0400 Received: from mail.efficios.com ([167.114.26.124]:46290 "EHLO mail.efficios.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726848AbgGNDD7 (ORCPT ); Mon, 13 Jul 2020 23:03:59 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.efficios.com (Postfix) with ESMTP id AF9D82B87A8; Mon, 13 Jul 2020 23:03:58 -0400 (EDT) Received: from mail.efficios.com ([127.0.0.1]) by localhost (mail03.efficios.com [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id nGaKxuycUWNC; Mon, 13 Jul 2020 23:03:58 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mail.efficios.com (Postfix) with ESMTP id 5E3AA2B8A02; Mon, 13 Jul 2020 23:03:56 -0400 (EDT) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.efficios.com 5E3AA2B8A02 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=efficios.com; s=default; t=1594695836; bh=hWvRJ4JuvRDS88JLdxiQVweIlzH+3zG8cEkM3JG7ei0=; h=From:To:Date:Message-Id; b=ogOQpKRjacYrJ3CRhGMKyzdqJSc+NbksTYxSNU8FW1nRmMb2Xh6N5umfU3PFNpmbV ZMMewoyj4mkwk8qMpaOSGgZfnZ5bXcoDrr8mYz7vCHMla+fKDX1b2L37wKXptESvSt c9tBKZc6bGVIsUfZAAqiLfHDXKoaujovff7f8s44VetFf/+o8KOpWD98FfnyRl+eH6 t+ZuFOBzJDFheQr3ywIG8fMJNq5RJ79QdzporFqmjcNyHM/kcy0WSXkXPdXKkH3Dw1 i/RxIInruAByyJsL+yZ0N8ryXXsrgXYLq9nA2b/AjlDDZqa8uedTYmxctZ9zIFBbeR v0+9fXxB7FIcg== X-Virus-Scanned: amavisd-new at efficios.com Received: from mail.efficios.com ([127.0.0.1]) by localhost (mail03.efficios.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id BX0KfU3bRstg; Mon, 13 Jul 2020 23:03:56 -0400 (EDT) Received: from localhost.localdomain (192-222-181-218.qc.cable.ebox.net [192.222.181.218]) by mail.efficios.com (Postfix) with ESMTPSA id D329B2B879E; Mon, 13 Jul 2020 23:03:55 -0400 (EDT) From: Mathieu Desnoyers To: Peter Zijlstra Cc: linux-kernel@vger.kernel.org, Thomas Gleixner , "Paul E . McKenney" , Boqun Feng , "H . Peter Anvin" , Paul Turner , linux-api@vger.kernel.org, Christian Brauner , Florian Weimer , carlos@redhat.com, Mathieu Desnoyers Subject: [RFC PATCH 4/4] selftests: rseq: print rseq extensible size in basic test Date: Mon, 13 Jul 2020 23:03:48 -0400 Message-Id: <20200714030348.6214-5-mathieu.desnoyers@efficios.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200714030348.6214-1-mathieu.desnoyers@efficios.com> References: <20200714030348.6214-1-mathieu.desnoyers@efficios.com> Sender: linux-api-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org Print whether extensible size feature is supported by the kernel and __rseq_abi definition, along with the contents of the kernel_size field if it is available. Signed-off-by: Mathieu Desnoyers --- tools/testing/selftests/rseq/basic_test.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c index d8efbfb89193..976e040574a1 100644 --- a/tools/testing/selftests/rseq/basic_test.c +++ b/tools/testing/selftests/rseq/basic_test.c @@ -10,6 +10,7 @@ #include #include #include +#include #include "rseq.h" @@ -35,6 +36,17 @@ void test_cpu_pointer(void) sched_setaffinity(0, sizeof(affinity), &affinity); } +static void print_rseq_size(void) +{ + bool supported = (__rseq_abi.flags & RSEQ_TLS_FLAG_SIZE) && __rseq_abi.kernel_size != 0; + + printf("extensible struct rseq supported: %s", + supported ? "yes" : "no"); + if (supported) + printf(" (kernel_size=%" PRIu16 ")", __rseq_abi.kernel_size); + printf("\n"); +} + int main(int argc, char **argv) { if (rseq_register_current_thread()) { @@ -42,6 +54,9 @@ int main(int argc, char **argv) errno, strerror(errno)); goto init_thread_error; } + + print_rseq_size(); + printf("testing current cpu\n"); test_cpu_pointer(); if (rseq_unregister_current_thread()) { -- 2.17.1