From nobody Mon May 6 17:28:31 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.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=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1571922213; cv=none; d=zoho.com; s=zohoarc; b=cj5AyRFrKCxQOuNa2UIN4AZv1sf06LC94xPfCEbELFvd07kR7A43EZKMUjrKlJaDDSL+Rw9Q+XDXUuZkM0cCHW9w+4T20TrB9AZdusK7RR5COljeYBWTEQOyb8J7vkC9gnN/Sev/VcgjCouRn+BTSM6daD494Yca3YHvnD17yAo= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1571922213; h=Content-Type: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=X2utYbP8AC9yOvhW0OqipUpdPxpmjRzyro5emZo5Syk=; b=kI4YOkuF5E9aWI6hOlOf0fjUTksjqJRiHRxaoMvgU/s9s04bqF7IMVA/hlWnOwBLEWoEWniatKeiMcW9KJYKYDr6BdD4qq9SY9DaRF9OviCe187XSAsmie6s5B7oPhKtG3zeWcNeYOJZrM9eInCLsyBepzz7uIFy7USU3h2wTEE= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=fail; spf=pass (zoho.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 1571922213413571.7394880868826; Thu, 24 Oct 2019 06:03:33 -0700 (PDT) Received: from localhost ([::1]:41920 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iNcm3-0006ZY-Ev for importer@patchew.org; Thu, 24 Oct 2019 09:03:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46185) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iNcAZ-0005sP-C0 for qemu-devel@nongnu.org; Thu, 24 Oct 2019 08:24:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iNcAY-0007LC-7Y for qemu-devel@nongnu.org; Thu, 24 Oct 2019 08:24:47 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:60228 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iNcAX-0007I5-0h for qemu-devel@nongnu.org; Thu, 24 Oct 2019 08:24:45 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-56-ywoUXk6xObmkhkStwZv-zA-1; Thu, 24 Oct 2019 08:24:42 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5CF0C1005500; Thu, 24 Oct 2019 12:24:41 +0000 (UTC) Received: from x1w.redhat.com (ovpn-204-184.brq.redhat.com [10.40.204.184]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8ED4B60BAC; Thu, 24 Oct 2019 12:24:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1571919883; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=X2utYbP8AC9yOvhW0OqipUpdPxpmjRzyro5emZo5Syk=; b=Qfpyh/jb/KyxWiUPQOfl/OZ6LMRnoRGyh92jgydFpTVtr1lcNf3KQSmwzxxGLpn/nYqmOp iDuepPiHCbRq22duTMHJQS4WOOC1pY8fjQAvCkAu3zNqdpKy35p1JeeHXqOF0rCcy/J105 XG9oQwAquHjzVCN5ZQ0P+FPVUCPynEs= From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: Paolo Bonzini , Marcelo Tosatti , qemu-devel@nongnu.org Subject: [PATCH v3 1/3] mc146818rtc: Simplify by reordering if() statement Date: Thu, 24 Oct 2019 14:24:23 +0200 Message-Id: <20191024122425.2483-2-philmd@redhat.com> In-Reply-To: <20191024122425.2483-1-philmd@redhat.com> References: <20191024122425.2483-1-philmd@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-MC-Unique: ywoUXk6xObmkhkStwZv-zA-1 X-Mimecast-Spam-Score: 0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.120 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: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Xiao Guangrong , Vadim Rozenfeld , "Michael S. Tsirkin" 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" Reorder the if() statement, so further changes in this function will be easier to read. Suggested-by: Paolo Bonzini Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- hw/timer/mc146818rtc.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/hw/timer/mc146818rtc.c b/hw/timer/mc146818rtc.c index 6cb378751b..2b6371faac 100644 --- a/hw/timer/mc146818rtc.c +++ b/hw/timer/mc146818rtc.c @@ -203,7 +203,12 @@ periodic_timer_update(RTCState *s, int64_t current_tim= e, uint32_t old_period) =20 period =3D rtc_periodic_clock_ticks(s); =20 - if (period) { + if (!period) { + s->irq_coalesced =3D 0; + timer_del(s->periodic_timer); + return; + } + /* compute 32 khz clock */ cur_clock =3D muldiv64(current_time, RTC_CLOCK_RATE, NANOSECONDS_PER_SECOND); @@ -263,10 +268,6 @@ periodic_timer_update(RTCState *s, int64_t current_tim= e, uint32_t old_period) next_irq_clock =3D cur_clock + period - lost_clock; s->next_periodic_time =3D periodic_clock_to_ns(next_irq_clock) + 1; timer_mod(s->periodic_timer, s->next_periodic_time); - } else { - s->irq_coalesced =3D 0; - timer_del(s->periodic_timer); - } } =20 static void rtc_periodic_timer(void *opaque) --=20 2.21.0 From nobody Mon May 6 17:28:31 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.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=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1571925733; cv=none; d=zoho.com; s=zohoarc; b=MsFbdRsgP33KcZY2LAZxaja8YRYduIQvcjUSiBlQ0IYRqF6Nf3XoLQexDTfeTjospfOjfKvRxYyMLHAyfTcNRokYDDS+J80xJzIgrgfrN6LsA0tYhcsObgKo4qiktB/2T53AFxZtbmITsksei1M0o0nQEgEjC8pokbSDP2H5MwU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1571925733; h=Content-Type: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; 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Thu, 24 Oct 2019 12:24:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1571919888; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=C8CTjgeOwG4HE5TRaGW+z86QAGyKyGnufEPpNzi2Qcw=; b=BWx9Hhlgi2NPcE15lt3LnDN6m35i7Lx2mYem8j4hQm68wEzwtLmiLMUUEERYpKiyvfiImU DaWH/7QDEBGVVPzghbtAW2wmf7C7v5xV0SxDDHrxZLhTPmK+VtZGuu3kybUNZXKyMCOpbO u1T7xxVxPDBE5Wgdoz6gbGdZL5TQnsU= From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: Paolo Bonzini , Marcelo Tosatti , qemu-devel@nongnu.org Subject: [PATCH v3 2/3] mc146818rtc: Tidy up indentation Date: Thu, 24 Oct 2019 14:24:24 +0200 Message-Id: <20191024122425.2483-3-philmd@redhat.com> In-Reply-To: <20191024122425.2483-1-philmd@redhat.com> References: <20191024122425.2483-1-philmd@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-MC-Unique: tCeGcfvxMrCn67biWkezkg-1 X-Mimecast-Spam-Score: 0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.61 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: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Xiao Guangrong , Vadim Rozenfeld , "Michael S. Tsirkin" 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" Re-indent, no functional change. Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- Patch easier to review with 'diff -b' (git show -b) --- hw/timer/mc146818rtc.c | 37 ++++++++++++++++++------------------- 1 file changed, 18 insertions(+), 19 deletions(-) diff --git a/hw/timer/mc146818rtc.c b/hw/timer/mc146818rtc.c index 2b6371faac..8da7fd1a50 100644 --- a/hw/timer/mc146818rtc.c +++ b/hw/timer/mc146818rtc.c @@ -209,22 +209,21 @@ periodic_timer_update(RTCState *s, int64_t current_ti= me, uint32_t old_period) return; } =20 - /* compute 32 khz clock */ - cur_clock =3D - muldiv64(current_time, RTC_CLOCK_RATE, NANOSECONDS_PER_SECOND); + /* compute 32 khz clock */ + cur_clock =3D muldiv64(current_time, RTC_CLOCK_RATE, NANOSECONDS_PER_S= ECOND); =20 - /* - * if the periodic timer's update is due to period re-configuration, - * we should count the clock since last interrupt. - */ - if (old_period) { - int64_t last_periodic_clock, next_periodic_clock; + /* + * if the periodic timer's update is due to period re-configuration, + * we should count the clock since last interrupt. + */ + if (old_period) { + int64_t last_periodic_clock, next_periodic_clock; =20 - next_periodic_clock =3D muldiv64(s->next_periodic_time, - RTC_CLOCK_RATE, NANOSECONDS_PER_SECOND= ); - last_periodic_clock =3D next_periodic_clock - old_period; - lost_clock =3D cur_clock - last_periodic_clock; - assert(lost_clock >=3D 0); + next_periodic_clock =3D muldiv64(s->next_periodic_time, + RTC_CLOCK_RATE, NANOSECONDS_PER_SECOND); + last_periodic_clock =3D next_periodic_clock - old_period; + lost_clock =3D cur_clock - last_periodic_clock; + assert(lost_clock >=3D 0); } =20 /* @@ -256,18 +255,18 @@ periodic_timer_update(RTCState *s, int64_t current_ti= me, uint32_t old_period) rtc_coalesced_timer_update(s); } } else { - /* + /* * no way to compensate the interrupt if LOST_TICK_POLICY_SLEW * is not used, we should make the time progress anyway. */ lost_clock =3D MIN(lost_clock, period); } =20 - assert(lost_clock >=3D 0 && lost_clock <=3D period); + assert(lost_clock >=3D 0 && lost_clock <=3D period); =20 - next_irq_clock =3D cur_clock + period - lost_clock; - s->next_periodic_time =3D periodic_clock_to_ns(next_irq_clock) + 1; - timer_mod(s->periodic_timer, s->next_periodic_time); + next_irq_clock =3D cur_clock + period - lost_clock; + s->next_periodic_time =3D periodic_clock_to_ns(next_irq_clock) + 1; + timer_mod(s->periodic_timer, s->next_periodic_time); } =20 static void rtc_periodic_timer(void *opaque) --=20 2.21.0 From nobody Mon May 6 17:28:31 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.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=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1571920944; cv=none; d=zoho.com; s=zohoarc; b=HdmjStUCWv41Jx/VzIqf7k65Wz3XpCNzbsbriiXpL/ML68mn1582NjDRn+dthnOMg6zbSegTyAn3lFoH2bW+BWOPeYnj2CzZGYYpfPdlLgK2apulv1eVbCH3az0gZLun7AeLZdXI2o/nVDaBaVUNxHq1slfkQ9SdPstFWgPXoV4= ARC-Message-Signature: i=1; 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Thu, 24 Oct 2019 12:24:58 +0000 (UTC) Received: from x1w.redhat.com (ovpn-204-184.brq.redhat.com [10.40.204.184]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 23C66605A6; Thu, 24 Oct 2019 12:24:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1571919903; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=JZAMN4B//LhIiWLht7TffCNiSr4z5k4zs0lJpc0SH8Y=; b=SFX542rCLjHnH0S/yLqvSYbm9QcPuczzA0io4k5RRZuypHY6s/ggO1ZMwtISi9NdNVLBKc bx/XSm3xwamf1RVBWWKoiXBNYThqYutcypkrtf3DrnQxDsQ1yCVeM1RCyhEQx8NlInFkvL 2ZOgNYUrCys9N85Jx1zKvFZis8T0hB8= From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: Paolo Bonzini , Marcelo Tosatti , qemu-devel@nongnu.org Subject: [PATCH v3 3/3] mc146818rtc: fix timer interrupt reinjection Date: Thu, 24 Oct 2019 14:24:25 +0200 Message-Id: <20191024122425.2483-4-philmd@redhat.com> In-Reply-To: <20191024122425.2483-1-philmd@redhat.com> References: <20191024122425.2483-1-philmd@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-MC-Unique: YyzGlylgMbuk-SoRy92QFg-1 X-Mimecast-Spam-Score: 0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.61 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: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Xiao Guangrong , Vadim Rozenfeld , "Michael S. Tsirkin" 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" From: Marcelo Tosatti commit 369b41359af46bded5799c9ef8be2b641d92e043 broke timer interrupt reinjection when there is no period change by the guest. In that case, old_period is 0, which ends up zeroing irq_coalesced (counter of reinjected interrupts). The consequence is Windows 7 is unable to synchronize time via NTP. Easily reproducible by playing a fullscreen video with cirrus and VNC. Fix by not updating s->irq_coalesced when old_period is 0. Signed-off-by: Marcelo Tosatti Message-Id: <20191010123008.GA19158@amt.cnet> Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- hw/timer/mc146818rtc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/timer/mc146818rtc.c b/hw/timer/mc146818rtc.c index 8da7fd1a50..adbc3b9d57 100644 --- a/hw/timer/mc146818rtc.c +++ b/hw/timer/mc146818rtc.c @@ -224,7 +224,6 @@ periodic_timer_update(RTCState *s, int64_t current_time= , uint32_t old_period) last_periodic_clock =3D next_periodic_clock - old_period; lost_clock =3D cur_clock - last_periodic_clock; assert(lost_clock >=3D 0); - } =20 /* * s->irq_coalesced can change for two reasons: @@ -261,6 +260,7 @@ periodic_timer_update(RTCState *s, int64_t current_time= , uint32_t old_period) */ lost_clock =3D MIN(lost_clock, period); } + } =20 assert(lost_clock >=3D 0 && lost_clock <=3D period); =20 --=20 2.21.0