From patchwork Fri Jun 21 09:52:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincenzo Frascino X-Patchwork-Id: 11009435 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E07C717D2 for ; Fri, 21 Jun 2019 09:54:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D17F6289EF for ; Fri, 21 Jun 2019 09:54:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C31FB289E8; Fri, 21 Jun 2019 09:54:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6FB8E289E5 for ; Fri, 21 Jun 2019 09:54:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726282AbfFUJyf (ORCPT ); Fri, 21 Jun 2019 05:54:35 -0400 Received: from foss.arm.com ([217.140.110.172]:55684 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727077AbfFUJxz (ORCPT ); Fri, 21 Jun 2019 05:53:55 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9FD291500; Fri, 21 Jun 2019 02:53:54 -0700 (PDT) Received: from e119884-lin.cambridge.arm.com (e119884-lin.cambridge.arm.com [10.1.196.72]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 15F783F246; Fri, 21 Jun 2019 02:53:51 -0700 (PDT) From: Vincenzo Frascino To: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Catalin Marinas , Will Deacon , Arnd Bergmann , Russell King , Ralf Baechle , Paul Burton , Daniel Lezcano , Thomas Gleixner , Mark Salyzyn , Peter Collingbourne , Shuah Khan , Dmitry Safonov <0x7f454c46@gmail.com>, Rasmus Villemoes , Huw Davies , Shijith Thotton , Andre Przywara Subject: [PATCH v7 17/25] arm: Add clock_getres entry point Date: Fri, 21 Jun 2019 10:52:44 +0100 Message-Id: <20190621095252.32307-18-vincenzo.frascino@arm.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190621095252.32307-1-vincenzo.frascino@arm.com> References: <20190621095252.32307-1-vincenzo.frascino@arm.com> MIME-Version: 1.0 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The generic vDSO library provides an implementation of clock_getres() that can be leveraged by each architecture. Add clock_getres() entry point on arm to be on pair with arm64. Cc: Russell King Signed-off-by: Vincenzo Frascino --- arch/arm/include/asm/vdso/gettimeofday.h | 20 ++++++++++++++++++++ arch/arm/vdso/vdso.lds.S | 1 + arch/arm/vdso/vgettimeofday.c | 6 ++++++ 3 files changed, 27 insertions(+) diff --git a/arch/arm/include/asm/vdso/gettimeofday.h b/arch/arm/include/asm/vdso/gettimeofday.h index 30ce4e87dffc..5b879ae7afc1 100644 --- a/arch/arm/include/asm/vdso/gettimeofday.h +++ b/arch/arm/include/asm/vdso/gettimeofday.h @@ -12,6 +12,8 @@ #include #include +#define VDSO_HAS_CLOCK_GETRES 1 + extern struct vdso_data *__get_datapage(void); static __always_inline int gettimeofday_fallback( @@ -50,6 +52,24 @@ static __always_inline long clock_gettime_fallback( return ret; } +static __always_inline int clock_getres_fallback( + clockid_t _clkid, + struct __kernel_timespec *_ts) +{ + register struct __kernel_timespec *ts asm("r1") = _ts; + register clockid_t clkid asm("r0") = _clkid; + register long ret asm ("r0"); + register long nr asm("r7") = __NR_clock_getres_time64; + + asm volatile( + " swi #0\n" + : "=r" (ret) + : "r" (clkid), "r" (ts), "r" (nr) + : "memory"); + + return ret; +} + static __always_inline u64 __arch_get_hw_counter(int clock_mode) { #ifdef CONFIG_ARM_ARCH_TIMER diff --git a/arch/arm/vdso/vdso.lds.S b/arch/arm/vdso/vdso.lds.S index 89ca89f12d23..1d81e8c3acf6 100644 --- a/arch/arm/vdso/vdso.lds.S +++ b/arch/arm/vdso/vdso.lds.S @@ -82,6 +82,7 @@ VERSION global: __vdso_clock_gettime; __vdso_gettimeofday; + __vdso_clock_getres; local: *; }; } diff --git a/arch/arm/vdso/vgettimeofday.c b/arch/arm/vdso/vgettimeofday.c index fea6b3c89f43..d3330c0c1147 100644 --- a/arch/arm/vdso/vgettimeofday.c +++ b/arch/arm/vdso/vgettimeofday.c @@ -32,6 +32,12 @@ int __vdso_gettimeofday(struct __kernel_old_timeval *tv, return __cvdso_gettimeofday(tv, tz); } +int __vdso_clock_getres(clockid_t clock_id, + struct old_timespec32 *res) +{ + return __cvdso_clock_getres_time32(clock_id, res); +} + /* Avoid unresolved references emitted by GCC */ void __aeabi_unwind_cpp_pr0(void)