From patchwork Thu May 30 17:49:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Pierrick Bouvier X-Patchwork-Id: 13680665 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5C309C25B74 for ; Thu, 30 May 2024 17:51:36 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sCjuY-0003s3-6C; Thu, 30 May 2024 13:49:58 -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 1sCjuX-0003rU-9u for qemu-devel@nongnu.org; Thu, 30 May 2024 13:49:57 -0400 Received: from mail-pl1-x632.google.com ([2607:f8b0:4864:20::632]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sCjuV-0002SM-D5 for qemu-devel@nongnu.org; Thu, 30 May 2024 13:49:57 -0400 Received: by mail-pl1-x632.google.com with SMTP id d9443c01a7336-1f61f775738so6692565ad.2 for ; Thu, 30 May 2024 10:49:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1717091392; x=1717696192; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=6IWWhHyfIReAoyuKPFTir6WLrARTyk7MyySJZx8v8IY=; b=LbENw2dr/TNmqoHOzpqHovhp2mLDPE4yjqa9r5fE9JPF555xHbHGPNNOqfTlj+xg6R K0UUBd7FkpBkoWbJmlO+yuJSc2OhQnwFASG1v9dO7CytVvbIHvPvMQn2d3AryznPuMMS wHJ+3+k3XEyrB7sdD8dw2GOkidKob2b1+giX1puasnpUaoRtvT6cIF6Z3r+rYf4bMe2E CqS8/Cw6Kg2L8Eu9pHwU4tBp8AGYRHJDII41+20uwhJQo3UM8p0UzBjXOnPZg3mPyEF4 NuJ5EkfYdt+VP7z986JQJoJNNNwX9RGNJUWxO2YMXpunauaABj4Z9Huc9D+T1jTd+Qpw JjwQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717091392; x=1717696192; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=6IWWhHyfIReAoyuKPFTir6WLrARTyk7MyySJZx8v8IY=; b=lJfZn+UDx3j+yLT8kfU+4jg/emfWcSezuN2/mfnKnpPQBjcNFWkiwhJ/Guh/Z3rt6e wKqSh0Uw3GUnMfzaJVdqfi9VZ9rsLReKwXpUb5d7sSozURt41kn/2SQU7t2DGkCcJXl1 RgtxZFmRJ3SxeX+bvgKMDOPTkJWAkW7hWSLZJ5tjGStIkHfqMkAc2aGGrZdgkTVrNZ3O 94fLA7sPUuB8E1ShNmmtK4bUdyM8WBSXrnKb8mYBvfPN+L+Ty6yHl2ACmiuuhOoKR8sp K+OtvSqPxzetfeOYWSjpKkBPhQ5dyrgywyt8ACJa9HdpiaK+hAi+LwzcqVCqFKtoqOZx RCfA== X-Gm-Message-State: AOJu0YyR7xJvQFrbsZxUYjSBzjEYDeT4fqCQ8+qLwRWVkzfKH7o2FcVU LEjI3XSUBhzx0+MHZHrb6qT27uGZMFO9Unj55UINBLioTRA4QK0zavA9M4xx0JChy5h00Me1W97 ghD8= X-Google-Smtp-Source: AGHT+IFAwF5cR+Jg7SUirFkFs9vWxwXiFldFvhwxAhkaK9VVVOTf6vSHeI8x1+uvDPOEf/Hw07wNTQ== X-Received: by 2002:a17:903:2385:b0:1f6:1144:a112 with SMTP id d9443c01a7336-1f6196087d6mr31883245ad.25.1717091392121; Thu, 30 May 2024 10:49:52 -0700 (PDT) Received: from linaro.vn.shawcable.net ([2604:3d08:9384:1d00::e697]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1f6323deb38sm590405ad.124.2024.05.30.10.49.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 May 2024 10:49:51 -0700 (PDT) From: Pierrick Bouvier To: qemu-devel@nongnu.org Cc: Richard Henderson , Laurent Vivier , =?utf-8?q?Alex_Benn=C3=A9e?= , Thomas Huth , Alexandre Iooss , Mahmoud Mandour , Paolo Bonzini , Pierrick Bouvier Subject: [PATCH v2 3/6] sysemu: generalise qtest_warp_clock as qemu_clock_advance_virtual_time Date: Thu, 30 May 2024 10:49:36 -0700 Message-Id: <20240530174939.749163-4-pierrick.bouvier@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240530174939.749163-1-pierrick.bouvier@linaro.org> References: <20240530174939.749163-1-pierrick.bouvier@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::632; envelope-from=pierrick.bouvier@linaro.org; helo=mail-pl1-x632.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, T_SCC_BODY_TEXT_LINE=-0.01 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Alex Bennée Move the key functionality of moving time forward into the clock sub-system itself. This will allow us to plumb in time control into plugins. From: Alex Bennée Signed-off-by: Alex Bennée Signed-off-by: Pierrick Bouvier --- include/qemu/timer.h | 15 +++++++++++++++ system/qtest.c | 25 +++---------------------- util/qemu-timer.c | 26 ++++++++++++++++++++++++++ 3 files changed, 44 insertions(+), 22 deletions(-) diff --git a/include/qemu/timer.h b/include/qemu/timer.h index 9a366e551fb..910587d8293 100644 --- a/include/qemu/timer.h +++ b/include/qemu/timer.h @@ -245,6 +245,21 @@ bool qemu_clock_run_timers(QEMUClockType type); */ bool qemu_clock_run_all_timers(void); +/** + * qemu_clock_advance_virtual_time(): advance the virtual time tick + * @target: target time in nanoseconds + * + * This function is used where the control of the flow of time has + * been delegated to outside the clock subsystem (be it qtest, icount + * or some other external source). You can ask the clock system to + * return @early at the first expired timer. + * + * Time can only move forward, attempts to reverse time would lead to + * an error. + * + * Returns: new virtual time. + */ +int64_t qemu_clock_advance_virtual_time(int64_t dest); /* * QEMUTimerList diff --git a/system/qtest.c b/system/qtest.c index ee8b139e982..e6f6b4e62d5 100644 --- a/system/qtest.c +++ b/system/qtest.c @@ -337,26 +337,6 @@ void qtest_set_virtual_clock(int64_t count) qatomic_set_i64(&qtest_clock_counter, count); } -static void qtest_clock_warp(int64_t dest) -{ - int64_t clock = cpus_get_virtual_clock(); - AioContext *aio_context; - assert(qtest_enabled()); - aio_context = qemu_get_aio_context(); - while (clock < dest) { - int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL, - QEMU_TIMER_ATTR_ALL); - int64_t warp = qemu_soonest_timeout(dest - clock, deadline); - - cpus_set_virtual_clock(cpus_get_virtual_clock() + warp); - - qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL); - timerlist_run_timers(aio_context->tlg.tl[QEMU_CLOCK_VIRTUAL]); - clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - } - qemu_clock_notify(QEMU_CLOCK_VIRTUAL); -} - static bool (*process_command_cb)(CharBackend *chr, gchar **words); void qtest_set_command_cb(bool (*pc_cb)(CharBackend *chr, gchar **words)) @@ -755,7 +735,8 @@ static void qtest_process_command(CharBackend *chr, gchar **words) ns = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL, QEMU_TIMER_ATTR_ALL); } - qtest_clock_warp(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + ns); + qemu_clock_advance_virtual_time( + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + ns); qtest_send_prefix(chr); qtest_sendf(chr, "OK %"PRIi64"\n", (int64_t)qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); @@ -781,7 +762,7 @@ static void qtest_process_command(CharBackend *chr, gchar **words) g_assert(words[1]); ret = qemu_strtoi64(words[1], NULL, 0, &ns); g_assert(ret == 0); - qtest_clock_warp(ns); + qemu_clock_advance_virtual_time(ns); qtest_send_prefix(chr); qtest_sendf(chr, "OK %"PRIi64"\n", (int64_t)qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); diff --git a/util/qemu-timer.c b/util/qemu-timer.c index 6a0de33dd2b..213114be68c 100644 --- a/util/qemu-timer.c +++ b/util/qemu-timer.c @@ -645,6 +645,11 @@ int64_t qemu_clock_get_ns(QEMUClockType type) } } +static void qemu_virtual_clock_set_ns(int64_t time) +{ + return cpus_set_virtual_clock(time); +} + void init_clocks(QEMUTimerListNotifyCB *notify_cb) { QEMUClockType type; @@ -675,3 +680,24 @@ bool qemu_clock_run_all_timers(void) return progress; } + +int64_t qemu_clock_advance_virtual_time(int64_t dest) +{ + int64_t clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + AioContext *aio_context; + aio_context = qemu_get_aio_context(); + while (clock < dest) { + int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL, + QEMU_TIMER_ATTR_ALL); + int64_t warp = qemu_soonest_timeout(dest - clock, deadline); + + qemu_virtual_clock_set_ns(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + warp); + + qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL); + timerlist_run_timers(aio_context->tlg.tl[QEMU_CLOCK_VIRTUAL]); + clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + } + qemu_clock_notify(QEMU_CLOCK_VIRTUAL); + + return clock; +}