From patchwork Mon Sep 14 06:06:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Pavel Dovgalyuk X-Patchwork-Id: 1363243 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=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=ispras.ru 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 4BqbWZ4wWQz9sTC for ; Mon, 14 Sep 2020 16:08:10 +1000 (AEST) Received: from localhost ([::1]:54928 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kHheq-0004iU-IP for incoming@patchwork.ozlabs.org; Mon, 14 Sep 2020 02:08:08 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36756) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kHhdM-0002JG-PS for qemu-devel@nongnu.org; Mon, 14 Sep 2020 02:06:36 -0400 Received: from mail.ispras.ru ([83.149.199.84]:44830) by eggs.gnu.org with esmtps (TLS1.2:DHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kHhdL-0002Gu-0s for qemu-devel@nongnu.org; Mon, 14 Sep 2020 02:06:36 -0400 Received: from [127.0.1.1] (unknown [62.118.151.149]) by mail.ispras.ru (Postfix) with ESMTPSA id 28EB740A2048; Mon, 14 Sep 2020 06:06:32 +0000 (UTC) Subject: [PATCH v4 01/15] replay: don't record interrupt poll From: Pavel Dovgalyuk To: qemu-devel@nongnu.org Date: Mon, 14 Sep 2020 09:06:31 +0300 Message-ID: <160006359182.31457.6752163542475006502.stgit@pasha-ThinkPad-X280> In-Reply-To: <160006358590.31457.16757371597343007847.stgit@pasha-ThinkPad-X280> References: <160006358590.31457.16757371597343007847.stgit@pasha-ThinkPad-X280> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Received-SPF: pass client-ip=83.149.199.84; envelope-from=pavel.dovgalyuk@ispras.ru; helo=mail.ispras.ru X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/14 02:06:27 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] 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: kwolf@redhat.com, wrampazz@redhat.com, pavel.dovgalyuk@ispras.ru, ehabkost@redhat.com, alex.bennee@linaro.org, mtosatti@redhat.com, armbru@redhat.com, mreitz@redhat.com, stefanha@redhat.com, crosa@redhat.com, pbonzini@redhat.com, philmd@redhat.com, zhiwei_liu@c-sky.com, rth@twiddle.net Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Interrupt poll is not a real interrupt event. It is needed only for thread safety. This interrupt is used for i386 and converted to hardware interrupt by cpu_handle_interrupt function. Therefore it is not needed to be recorded, because hardware interrupt will be recorded after converting. Signed-off-by: Pavel Dovgalyuk Reviewed-by: Alex Bennée --- v4 changes: - Condition check refactoring (suggested by Alex Bennée) --- accel/tcg/cpu-exec.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c index 66d38f9d85..c065b4cc77 100644 --- a/accel/tcg/cpu-exec.c +++ b/accel/tcg/cpu-exec.c @@ -429,8 +429,7 @@ static inline bool cpu_handle_halt(CPUState *cpu) { if (cpu->halted) { #if defined(TARGET_I386) && !defined(CONFIG_USER_ONLY) - if ((cpu->interrupt_request & CPU_INTERRUPT_POLL) - && replay_interrupt()) { + if (cpu->interrupt_request & CPU_INTERRUPT_POLL) { X86CPU *x86_cpu = X86_CPU(cpu); qemu_mutex_lock_iothread(); apic_poll_irq(x86_cpu->apic_state); @@ -526,6 +525,20 @@ static inline bool cpu_handle_exception(CPUState *cpu, int *ret) return false; } +/* + * CPU_INTERRUPT_POLL is a virtual event which gets converted into a + * "real" interrupt event later. It does not need to be recorded for + * replay purposes. + */ +static inline bool need_replay_interrupt(int interrupt_request) +{ +#if defined(TARGET_I386) + return !(interrupt_request & CPU_INTERRUPT_POLL); +#else + return true; +#endif +} + static inline bool cpu_handle_interrupt(CPUState *cpu, TranslationBlock **last_tb) { @@ -587,7 +600,9 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, and via longjmp via cpu_loop_exit. */ else { if (cc->cpu_exec_interrupt(cpu, interrupt_request)) { - replay_interrupt(); + if (need_replay_interrupt(interrupt_request)) { + replay_interrupt(); + } /* * After processing the interrupt, ensure an EXCP_DEBUG is * raised when single-stepping so that GDB doesn't miss the