From patchwork Mon Feb 1 07:05:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Dovgalyuk X-Patchwork-Id: 1434051 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 ozlabs.org (Postfix) with ESMTPS id 4DTf9y0sm1z9sWL for ; Mon, 1 Feb 2021 18:06:11 +1100 (AEDT) Received: from localhost ([::1]:33580 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l6THj-0003Mo-Oa for incoming@patchwork.ozlabs.org; Mon, 01 Feb 2021 02:06:07 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:55870) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l6THH-0003MP-Ty for qemu-devel@nongnu.org; Mon, 01 Feb 2021 02:05:39 -0500 Received: from mail.ispras.ru ([83.149.199.84]:32956) by eggs.gnu.org with esmtps (TLS1.2:DHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l6THD-0007Uq-5i for qemu-devel@nongnu.org; Mon, 01 Feb 2021 02:05:39 -0500 Received: from [127.0.1.1] (unknown [62.118.151.149]) by mail.ispras.ru (Postfix) with ESMTPSA id 59761407626D; Mon, 1 Feb 2021 07:05:28 +0000 (UTC) Subject: [PATCH v2] replay: fix replay of the interrupts From: Pavel Dovgalyuk To: qemu-devel@nongnu.org Date: Mon, 01 Feb 2021 10:05:27 +0300 Message-ID: <161216312794.2030770.1709657858900983160.stgit@pasha-ThinkPad-X280> User-Agent: StGit/0.23 MIME-Version: 1.0 Received-SPF: pass client-ip=83.149.199.84; envelope-from=pavel.dovgalyuk@ispras.ru; helo=mail.ispras.ru X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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: peter.maydell@linaro.org, pavel.dovgalyuk@ispras.ru, richard.henderson@linaro.org, f4bug@amsat.org, cfontana@suse.de, pbonzini@redhat.com, alex.bennee@linaro.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Sometimes interrupt event comes at the same time with the virtual timers. In this case replay tries to proceed the timers, because deadline for them is zero. This patch allows processing interrupts and exceptions by entering the vCPU execution loop, when deadline is zero, but checkpoint associated with virtual timers is not ready to be replayed. Signed-off-by: Pavel Dovgalyuk --- v2: - changed replay mode check condition --- accel/tcg/tcg-cpus-icount.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/accel/tcg/tcg-cpus-icount.c b/accel/tcg/tcg-cpus-icount.c index 9f45432275..8ed485db01 100644 --- a/accel/tcg/tcg-cpus-icount.c +++ b/accel/tcg/tcg-cpus-icount.c @@ -81,7 +81,13 @@ void icount_handle_deadline(void) int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL, QEMU_TIMER_ATTR_ALL); - if (deadline == 0) { + /* + * Instructions, interrupts, and exceptions are processed in cpu-exec. + * Don't interrupt cpu thread, when these events are waiting + * (i.e., there is no checkpoint) + */ + if (deadline == 0 + && (replay_mode != REPLAY_MODE_PLAY || replay_has_checkpoint())) { icount_notify_aio_contexts(); } }