From nobody Sat May 18 21:00:22 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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=pass(p=none dis=none) header.from=yandex-team.ru ARC-Seal: i=1; a=rsa-sha256; t=1714052332; cv=none; d=zohomail.com; s=zohoarc; b=bRtWa6NYVXF0VP8jLHoqNz5dVQFYwProCtMVHYN08eSzZ2qWBNktNT/LfLKrLbIVVkpd4cEyFoXc40sL3BK3F99AGVHWH+Oyf4xpnh0jR9ryZ2u+2lsFg7UutIIjyM0iadt2KiYSkz12g8vZIQC8fi2GCpPYMj1o8Tv4USfzayM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1714052332; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=QcXoRXBIeDEitezOvzR9Z/eG00TJczRwkbAOh24raWY=; b=azF4sxDvss8C8HH3+FHvRRKHqMD88L4SaeMPHEYE18tG8UTEGj7tz+6DAIpRGdBELM79e3xubpQYaVqhq/fprP2ljsedJQETFy9w8EcF/R+HgjZx0CA3YHnYBQ07xfM9JT/tBDWleNjTCXmM+IU6jhMafHteU1PpB45lgtBVbko= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1714052332232445.08163663835717; Thu, 25 Apr 2024 06:38:52 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rzzIs-0003Fr-2T; Thu, 25 Apr 2024 09:38:22 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rzzIp-0003Fg-Fh for qemu-devel@nongnu.org; Thu, 25 Apr 2024 09:38:19 -0400 Received: from forwardcorp1b.mail.yandex.net ([178.154.239.136]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rzzIm-00007j-K5 for qemu-devel@nongnu.org; Thu, 25 Apr 2024 09:38:19 -0400 Received: from mail-nwsmtp-smtp-corp-main-80.iva.yp-c.yandex.net (mail-nwsmtp-smtp-corp-main-80.iva.yp-c.yandex.net [IPv6:2a02:6b8:c0c:c10a:0:640:882f:0]) by forwardcorp1b.mail.yandex.net (Yandex) with ESMTPS id DCBC660AB8; Thu, 25 Apr 2024 16:38:07 +0300 (MSK) Received: from d-tatianin-lin.yandex-team.ru (unknown [2a02:6b8:b081:8928::1:1e]) by mail-nwsmtp-smtp-corp-main-80.iva.yp-c.yandex.net (smtpcorp/Yandex) with ESMTPSA id 1cMZOS3IdeA0-CEog7zTA; Thu, 25 Apr 2024 16:38:07 +0300 X-Yandex-Fwd: 1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1714052287; bh=QcXoRXBIeDEitezOvzR9Z/eG00TJczRwkbAOh24raWY=; h=Message-Id:Date:Cc:Subject:To:From; b=vdbm9nvq1oy+Hj+tkOKm+LpA5l8F2P1PiX48RilvY3IAAwe+xolc0sRx/UTLOEhcA gLmOcridXuTrEbe0wjenus9EMaMoqaCiOgACPI0Be5aDZOCFFhbTkasfcUJy9KqX2J 16QdhAHdy1m5QDkMKFZxwT4viBN9McVLTNqFiLJw= Authentication-Results: mail-nwsmtp-smtp-corp-main-80.iva.yp-c.yandex.net; dkim=pass header.i=@yandex-team.ru From: Daniil Tatianin To: "Michael S. Tsirkin" Cc: Daniil Tatianin , Paolo Bonzini , Eric Blake , Markus Armbruster , qemu-devel@nongnu.org Subject: [PATCH] mc146818rtc: add a way to generate RTC interrupts via QMP Date: Thu, 25 Apr 2024 16:37:45 +0300 Message-Id: <20240425133745.464091-1-d-tatianin@yandex-team.ru> X-Mailer: git-send-email 2.34.1 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=178.154.239.136; envelope-from=d-tatianin@yandex-team.ru; helo=forwardcorp1b.mail.yandex.net 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, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @yandex-team.ru) X-ZM-MESSAGEID: 1714052333514100001 Content-Type: text/plain; charset="utf-8" This can be used to force-synchronize the time in guest after a long stop-cont pause, which can be useful for serverless-type workload. Signed-off-by: Daniil Tatianin --- hw/rtc/mc146818rtc.c | 15 +++++++++++++++ include/hw/rtc/mc146818rtc.h | 1 + qapi/misc-target.json | 16 ++++++++++++++++ 3 files changed, 32 insertions(+) diff --git a/hw/rtc/mc146818rtc.c b/hw/rtc/mc146818rtc.c index f4c1869232..6980a78d5f 100644 --- a/hw/rtc/mc146818rtc.c +++ b/hw/rtc/mc146818rtc.c @@ -116,6 +116,21 @@ void qmp_rtc_reset_reinjection(Error **errp) } } =20 +void qmp_rtc_notify(Error **errp) +{ + MC146818RtcState *s; + + /* + * See: + * https://www.kernel.org/doc/Documentation/virtual/kvm/timekeeping.txt + */ + QLIST_FOREACH(s, &rtc_devices, link) { + s->cmos_data[RTC_REG_B] |=3D REG_B_UIE; + s->cmos_data[RTC_REG_C] |=3D REG_C_IRQF | REG_C_UF; + qemu_irq_raise(s->irq); + } +} + static bool rtc_policy_slew_deliver_irq(MC146818RtcState *s) { kvm_reset_irq_delivered(); diff --git a/include/hw/rtc/mc146818rtc.h b/include/hw/rtc/mc146818rtc.h index 97cec0b3e8..5229dffbbd 100644 --- a/include/hw/rtc/mc146818rtc.h +++ b/include/hw/rtc/mc146818rtc.h @@ -56,5 +56,6 @@ MC146818RtcState *mc146818_rtc_init(ISABus *bus, int base= _year, void mc146818rtc_set_cmos_data(MC146818RtcState *s, int addr, int val); int mc146818rtc_get_cmos_data(MC146818RtcState *s, int addr); void qmp_rtc_reset_reinjection(Error **errp); +void qmp_rtc_notify(Error **errp); =20 #endif /* HW_RTC_MC146818RTC_H */ diff --git a/qapi/misc-target.json b/qapi/misc-target.json index 4e0a6492a9..20457b0acc 100644 --- a/qapi/misc-target.json +++ b/qapi/misc-target.json @@ -19,6 +19,22 @@ { 'command': 'rtc-reset-reinjection', 'if': 'TARGET_I386' } =20 +## +# @rtc-notify: +# +# Generate an RTC interrupt. +# +# Since: 9.1 +# +# Example: +# +# -> { "execute": "rtc-notify" } +# <- { "return": {} } +# +## +{ 'command': 'rtc-notify', + 'if': 'TARGET_I386' } + ## # @SevState: # --=20 2.34.1