From nobody Mon Feb 9 06:01:50 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1607454227; cv=none; d=zohomail.com; s=zohoarc; b=Lsb0h9qs3dFcziekwOkNPL73/bJKWcuc7uep3FQK2k9kqtrm3z+3JlJPpyYT2IjcGZcWqtJZLlcuaYVShhdMVjwrUxxsmyBJO0WkZsV2xFw8h/Bt2CrQlbGAFuMyBnF9rlLsNHigwDk4yJpVZtE/lXrURarinOQCjCvWvwyeCOY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1607454227; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=rsusvVmbp8UtSIK1LPtaov69Vpog2i9qOUwwDMskU2I=; b=EPTkV3uP74KrSD5E4GdZWVHr9dBcwPvnrcvk1OLYRssJ0CqsJXtjDNWFwnPFN8K63fvKx51ZmmbkzGiffR9UKnFJ+g2+GzQMWWV4YcAnjCTAT2sJsekCTtobtIAFq8TTRZ2Ofzzo9Zmt/tq4X/vhfBmQsQUTX8CJkn3c8PF0xMI= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1607454227265393.91626089427393; Tue, 8 Dec 2020 11:03:47 -0800 (PST) Received: from localhost ([::1]:59228 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kmi0K-0002MF-53 for importer@patchew.org; Tue, 08 Dec 2020 13:46:28 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:59870) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kmhWw-0005Iy-N2 for qemu-devel@nongnu.org; Tue, 08 Dec 2020 13:16:07 -0500 Received: from mail-wr1-x429.google.com ([2a00:1450:4864:20::429]:33737) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kmhWu-0007wI-HM for qemu-devel@nongnu.org; Tue, 08 Dec 2020 13:16:06 -0500 Received: by mail-wr1-x429.google.com with SMTP id r14so1531613wrn.0 for ; Tue, 08 Dec 2020 10:16:02 -0800 (PST) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [81.2.115.148]) by smtp.gmail.com with ESMTPSA id u12sm4978873wmu.28.2020.12.08.10.16.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Dec 2020 10:16:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=rsusvVmbp8UtSIK1LPtaov69Vpog2i9qOUwwDMskU2I=; b=h2ATfoOfy+TtIs6mm776iESpSRHVWTZ9OCtpa/Rb2BGWsVFL7fU4/2KNuemzORIpkX 8WtDp7+z7EGEmVX2mrwEL9smse3P8N6VhoPb1IVmp5yB5W12ScYrDTlTydmB5WprOuh/ 8vZIybbxHBOK12AXmcMZCZKkPDWCl7Al6Q6aPLdNqOjp97O5gFttEuwGdmv9SoPzllEe pcHo3gspjfb9Hx+T0kv75OOmIuztlEvD7cOIosJGs01XfXxWR56h1ME6kCZ3UIcrmO9R D9mdJNthUDhuNEtoChLPN02j8Atd7aWzcGEYnHozi9ER6cW5Hb/bL8v4QODiWBRv645z omCA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=rsusvVmbp8UtSIK1LPtaov69Vpog2i9qOUwwDMskU2I=; b=DGNHEwtwnUlCT4o98dLD4ijv21F8cZ3/NrFXWVeJo89et5xIedg7bi9an+sMPY4ct3 MzbbphCaqCHohi9A90TMTfl0i2SR/WaOwhimwHMCMefn8B4S8JhrKex/tT8Gapo/4Lve XsclFf1jp8ciNHi6ZmUXDtFECeMu2sJswlokuvp7ctXXsguFOnvfmgWqaWCKOutFep1d jKEfu6xZTKjv7iS7FQoYdwNXJirh+FvljSkZs6n5YVITDft2XJqr/AxexDVFhvJ5nCEt AHiQRdr2+w67g/57ghICKteATDc9xbKVUhC6jOPnY+L8+LbRlHvc4U9VgcwXhTkUqy6G z5CA== X-Gm-Message-State: AOAM530xZvpQNn6gK4ZkWvaXkNfBModz3eRFElE/cw72ua5zF+OkPzwv UnvadfftqQFkV2WWqKdyLbqpeuUDNR4SFQ== X-Google-Smtp-Source: ABdhPJx4cBKQMUYUxJRttpZJJdyw+ZuXFGXNfImKdemxxc6qeVdfNqKbNtL9aFSmcMmDQVxDNK/ltw== X-Received: by 2002:adf:9525:: with SMTP id 34mr3378591wrs.389.1607451361253; Tue, 08 Dec 2020 10:16:01 -0800 (PST) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PATCH 4/4] clock: Define and use new clock_display_freq() Date: Tue, 8 Dec 2020 18:15:54 +0000 Message-Id: <20201208181554.435-5-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201208181554.435-1-peter.maydell@linaro.org> References: <20201208181554.435-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::429; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x429.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Damien Hedde , Luc Michel , Aleksandar Rikalo , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" It's common to want to print a human-readable indication of a clock's frequency. Provide a utility function in the clock API to return a string which is a displayable representation of the frequency, and use it in qdev-monitor.c. Before: (qemu) info qtree [...] dev: xilinx,zynq_slcr, id "" clock-in "ps_clk" freq_hz=3D3.333333e+07 mmio 00000000f8000000/0000000000001000 After: dev: xilinx,zynq_slcr, id "" clock-in "ps_clk" freq_hz=3D33.3 MHz mmio 00000000f8000000/0000000000001000 Signed-off-by: Peter Maydell Reviewed-by: Luc Michel Reviewed-by: Richard Henderson --- This is based on Philippe's patch "qdev-monitor: Display frequencies scaled to SI unit" but I have abstracted out the "prettified string" into the clock API. --- docs/devel/clocks.rst | 5 +++++ include/hw/clock.h | 12 ++++++++++++ hw/core/clock.c | 6 ++++++ softmmu/qdev-monitor.c | 6 +++--- 4 files changed, 26 insertions(+), 3 deletions(-) diff --git a/docs/devel/clocks.rst b/docs/devel/clocks.rst index 9a93d1361b4..cf8067542a1 100644 --- a/docs/devel/clocks.rst +++ b/docs/devel/clocks.rst @@ -267,6 +267,11 @@ Here is an example: clock_get(dev->my_clk_input)); } =20 +If you are only interested in the frequency for displaying it to +humans (for instance in debugging), use ``clock_display_freq()``, +which returns a prettified string-representation, e.g. "33.3 MHz". +The caller must free the string with g_free() after use. + Calculating expiry deadlines ---------------------------- =20 diff --git a/include/hw/clock.h b/include/hw/clock.h index 9c0b1eb4c3f..7bc9afb0800 100644 --- a/include/hw/clock.h +++ b/include/hw/clock.h @@ -252,4 +252,16 @@ static inline bool clock_is_enabled(const Clock *clk) return clock_get(clk) !=3D 0; } =20 +/** + * clock_display_freq: return human-readable representation of clock frequ= ency + * @clk: clock + * + * Return a string which has a human-readable representation of the + * clock's frequency, e.g. "33.3 MHz". This is intended for debug + * and display purposes. + * + * The caller is responsible for freeing the string with g_free(). + */ +char *clock_display_freq(Clock *clk); + #endif /* QEMU_HW_CLOCK_H */ diff --git a/hw/core/clock.c b/hw/core/clock.c index 8c6af223e7c..76b5f468b6e 100644 --- a/hw/core/clock.c +++ b/hw/core/clock.c @@ -12,6 +12,7 @@ */ =20 #include "qemu/osdep.h" +#include "qemu/cutils.h" #include "hw/clock.h" #include "trace.h" =20 @@ -111,6 +112,11 @@ static void clock_disconnect(Clock *clk) QLIST_REMOVE(clk, sibling); } =20 +char *clock_display_freq(Clock *clk) +{ + return freq_to_str(clock_get_hz(clk)); +} + static void clock_initfn(Object *obj) { Clock *clk =3D CLOCK(obj); diff --git a/softmmu/qdev-monitor.c b/softmmu/qdev-monitor.c index bf79d0bbcd9..6263d600026 100644 --- a/softmmu/qdev-monitor.c +++ b/softmmu/qdev-monitor.c @@ -747,11 +747,11 @@ static void qdev_print(Monitor *mon, DeviceState *dev= , int indent) } } QLIST_FOREACH(ncl, &dev->clocks, node) { - qdev_printf("clock-%s%s \"%s\" freq_hz=3D%e\n", + g_autofree char *freq_str =3D clock_display_freq(ncl->clock); + qdev_printf("clock-%s%s \"%s\" freq_hz=3D%s\n", ncl->output ? "out" : "in", ncl->alias ? " (alias)" : "", - ncl->name, - CLOCK_PERIOD_TO_HZ(1.0 * clock_get(ncl->clock))); + ncl->name, freq_str); } class =3D object_get_class(OBJECT(dev)); do { --=20 2.20.1