From patchwork Tue Jan 19 12:39:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Dovgalyuk X-Patchwork-Id: 12029767 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D2C22C433E0 for ; Tue, 19 Jan 2021 12:42:36 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 0902A2310E for ; Tue, 19 Jan 2021 12:42:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0902A2310E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=ispras.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:56396 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l1qLC-0006kE-Sr for qemu-devel@archiver.kernel.org; Tue, 19 Jan 2021 07:42:34 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:35162) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l1qIp-0005hj-LC for qemu-devel@nongnu.org; Tue, 19 Jan 2021 07:40:07 -0500 Received: from mail.ispras.ru ([83.149.199.84]:50202) by eggs.gnu.org with esmtps (TLS1.2:DHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l1qIm-0001gs-SS for qemu-devel@nongnu.org; Tue, 19 Jan 2021 07:40:07 -0500 Received: from [127.0.1.1] (unknown [62.118.151.149]) by mail.ispras.ru (Postfix) with ESMTPSA id C9F8440D403E; Tue, 19 Jan 2021 12:39:53 +0000 (UTC) Subject: [PATCH] replay: fix replay of the interrupts From: Pavel Dovgalyuk To: qemu-devel@nongnu.org Date: Tue, 19 Jan 2021 15:39:53 +0300 Message-ID: <161105999349.694343.16096128094758045254.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: pbonzini@redhat.com, richard.henderson@linaro.org, pavel.dovgalyuk@ispras.ru Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.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 --- 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..a6d2bb8a88 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_RECORD || replay_has_checkpoint())) { icount_notify_aio_contexts(); } }