From patchwork Mon Apr 1 11:51:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincenzo Frascino X-Patchwork-Id: 10879815 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 1318517EE for ; Mon, 1 Apr 2019 12:08:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EC3152876D for ; Mon, 1 Apr 2019 12:08:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DFEDA28776; Mon, 1 Apr 2019 12:08:37 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7F3FD2876D for ; Mon, 1 Apr 2019 12:08:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=tgONXlhPQNUWK34Eu7SaoKOrFCxz1sRkldmvzCTJHEw=; b=LM3wKxe6JBf/Qn 7rtQAOUrVG01ztfPUBg0qY6GKllmHgqHu/AbEBVBmrTGrp6TTRfgs2ub+PxIFBQNVjHzhDg9sfWRA LbhaqOQDE+5KgPavQGcQya5/X1O+mtuFhFCbrkagT3S6JUBwWoYmPMwg22H4FzraDtPFNwPfL4Box WCH9a4QGR3mH/yxTAzQots9Lo50fd2/1hlfrvbXUtg97dkvJ1krdM8XPI2I9YtpxRyA2AgzIfyrh4 rCcxbDMFrp0XKG2HC7VzLv796A7UPIJ9QGWGMfzIFMaCzTNmd6QHaZBj+l1lP59JXAzx32M8RSWP7 XA6AArTiQgQz+N6dXefw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hAvjw-0008L7-DV; Mon, 01 Apr 2019 12:08:36 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hAvUH-0007Li-M1 for linux-arm-kernel@lists.infradead.org; Mon, 01 Apr 2019 11:52:33 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 4CBB61688; Mon, 1 Apr 2019 04:52:25 -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 9BFE73F557; Mon, 1 Apr 2019 04:52:22 -0700 (PDT) From: Vincenzo Frascino To: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org Subject: [PATCH 4/5] nds32: Fix vDSO clock_getres() Date: Mon, 1 Apr 2019 12:51:51 +0100 Message-Id: <20190401115152.32751-5-vincenzo.frascino@arm.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190401115152.32751-1-vincenzo.frascino@arm.com> References: <20190401115152.32751-1-vincenzo.frascino@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190401_045226_339584_BB88AB0D X-CRM114-Status: GOOD ( 16.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Benjamin Herrenschmidt , Arnd Bergmann , Heiko Carstens , Catalin Marinas , Will Deacon , Paul Mackerras , Greentime Hu , Michael Ellerman , Martin Schwidefsky , Thomas Gleixner , Vincent Chen , Shuah Khan Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP clock_getres in the vDSO library has to preserve the same behaviour of posix_get_hrtimer_res(). In particular, posix_get_hrtimer_res() does: sec = 0; ns = hrtimer_resolution; and hrtimer_resolution depends on the enablement of the high resolution timers that can happen either at compile or at run time. Fix the nds32 vdso implementation of clock_getres keeping a copy of hrtimer_resolution in vdso data and using that directly. Cc: Greentime Hu Cc: Vincent Chen Signed-off-by: Vincenzo Frascino --- arch/nds32/include/asm/vdso_datapage.h | 1 + arch/nds32/kernel/vdso.c | 1 + arch/nds32/kernel/vdso/gettimeofday.c | 4 +++- 3 files changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/nds32/include/asm/vdso_datapage.h b/arch/nds32/include/asm/vdso_datapage.h index 79db5a12ca5e..34d80548297f 100644 --- a/arch/nds32/include/asm/vdso_datapage.h +++ b/arch/nds32/include/asm/vdso_datapage.h @@ -20,6 +20,7 @@ struct vdso_data { u32 xtime_clock_sec; /* CLOCK_REALTIME - seconds */ u32 cs_mult; /* clocksource multiplier */ u32 cs_shift; /* Cycle to nanosecond divisor (power of two) */ + u32 hrtimer_res; /* hrtimer resolution */ u64 cs_cycle_last; /* last cycle value */ u64 cs_mask; /* clocksource mask */ diff --git a/arch/nds32/kernel/vdso.c b/arch/nds32/kernel/vdso.c index 016f15891f6d..90bcae6f8554 100644 --- a/arch/nds32/kernel/vdso.c +++ b/arch/nds32/kernel/vdso.c @@ -220,6 +220,7 @@ void update_vsyscall(struct timekeeper *tk) vdso_data->xtime_coarse_sec = tk->xtime_sec; vdso_data->xtime_coarse_nsec = tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift; + vdso_data->hrtimer_res = hrtimer_resolution; vdso_write_end(vdso_data); } diff --git a/arch/nds32/kernel/vdso/gettimeofday.c b/arch/nds32/kernel/vdso/gettimeofday.c index 038721af40e3..b02581891c33 100644 --- a/arch/nds32/kernel/vdso/gettimeofday.c +++ b/arch/nds32/kernel/vdso/gettimeofday.c @@ -208,6 +208,8 @@ static notrace int clock_getres_fallback(clockid_t _clk_id, notrace int __vdso_clock_getres(clockid_t clk_id, struct timespec *res) { + struct vdso_data *vdata = __get_datapage(); + if (res == NULL) return 0; switch (clk_id) { @@ -215,7 +217,7 @@ notrace int __vdso_clock_getres(clockid_t clk_id, struct timespec *res) case CLOCK_MONOTONIC: case CLOCK_MONOTONIC_RAW: res->tv_sec = 0; - res->tv_nsec = CLOCK_REALTIME_RES; + res->tv_nsec = vdata->hrtimer_res; break; case CLOCK_REALTIME_COARSE: case CLOCK_MONOTONIC_COARSE: