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=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 D6A21C433E0 for ; Mon, 3 Aug 2020 05:57:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C0F1820678 for ; Mon, 3 Aug 2020 05:57:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728261AbgHCF5L (ORCPT ); Mon, 3 Aug 2020 01:57:11 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:47636 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727889AbgHCF5J (ORCPT ); Mon, 3 Aug 2020 01:57:09 -0400 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0735WrEX068218; Mon, 3 Aug 2020 01:56:55 -0400 Received: from ppma04fra.de.ibm.com (6a.4a.5195.ip4.static.sl-reverse.com [149.81.74.106]) by mx0a-001b2d01.pphosted.com with ESMTP id 32pap7tt2q-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 03 Aug 2020 01:56:54 -0400 Received: from pps.filterd (ppma04fra.de.ibm.com [127.0.0.1]) by ppma04fra.de.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 0735omWa026674; Mon, 3 Aug 2020 05:56:52 GMT Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by ppma04fra.de.ibm.com with ESMTP id 32n01893t2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 03 Aug 2020 05:56:52 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0735unTs31392074 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 3 Aug 2020 05:56:50 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C057952051; Mon, 3 Aug 2020 05:56:49 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTPS id B7EA852052; Mon, 3 Aug 2020 05:56:49 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 55390) id 79AC6E03D7; Mon, 3 Aug 2020 07:56:49 +0200 (CEST) From: Sven Schnelle To: Thomas Gleixner , Vincenzo Frascino Cc: linux-kernel@vger.kernel.org, Sven Schnelle Subject: [PATCH 1/2] vdso: allow to add architecture-specific vdso data Date: Mon, 3 Aug 2020 07:56:44 +0200 Message-Id: <20200803055645.79042-2-svens@linux.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200803055645.79042-1-svens@linux.ibm.com> References: <20200803055645.79042-1-svens@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-08-03_04:2020-07-31,2020-08-03 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 mlxscore=0 clxscore=1015 suspectscore=0 priorityscore=1501 mlxlogscore=999 lowpriorityscore=0 malwarescore=0 phishscore=0 spamscore=0 impostorscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008030037 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the possibility to add architecture specific vDSO data to struct vdso_data. This is useful if the arch specific user space VDSO code needs additional data during execution. If CONFIG_ARCH_HAS_VDSO_DATA is defined, the generic code will include asm/vdso/data.h which should contain 'struct arch_vdso_data'. This structure will be embedded in the generic vDSO data. Signed-off-by: Sven Schnelle Reviewed-by: Heiko Carstens --- arch/Kconfig | 3 +++ include/vdso/datapage.h | 7 +++++++ 2 files changed, 10 insertions(+) diff --git a/arch/Kconfig b/arch/Kconfig index 8cc35dc556c7..e1017ce979e2 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -979,6 +979,9 @@ config HAVE_SPARSE_SYSCALL_NR entries at 4000, 5000 and 6000 locations. This option turns on syscall related optimizations for a given architecture. +config ARCH_HAS_VDSO_DATA + bool + source "kernel/gcov/Kconfig" source "scripts/gcc-plugins/Kconfig" diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h index 7955c56d6b3c..74e730238ce6 100644 --- a/include/vdso/datapage.h +++ b/include/vdso/datapage.h @@ -19,6 +19,10 @@ #include #include +#ifdef CONFIG_ARCH_HAS_VDSO_DATA +#include +#endif + #define VDSO_BASES (CLOCK_TAI + 1) #define VDSO_HRES (BIT(CLOCK_REALTIME) | \ BIT(CLOCK_MONOTONIC) | \ @@ -97,6 +101,9 @@ struct vdso_data { s32 tz_dsttime; u32 hrtimer_res; u32 __unused; +#ifdef CONFIG_ARCH_HAS_VDSO_DATA + struct arch_vdso_data arch; +#endif }; /* -- 2.17.1