From patchwork Wed Aug 5 18:12:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Foley X-Patchwork-Id: 11702201 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C3D5414B7 for ; Wed, 5 Aug 2020 18:28:30 +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 98BC722CE3 for ; Wed, 5 Aug 2020 18:28:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="Jw+hFPvo" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 98BC722CE3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:58934 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k3O9N-000530-35 for patchwork-qemu-devel@patchwork.kernel.org; Wed, 05 Aug 2020 14:28:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50140) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k3Nz2-0004hY-4u for qemu-devel@nongnu.org; Wed, 05 Aug 2020 14:17:48 -0400 Received: from mail-pf1-x42c.google.com ([2607:f8b0:4864:20::42c]:33227) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1k3Nyy-0006VW-IX for qemu-devel@nongnu.org; Wed, 05 Aug 2020 14:17:47 -0400 Received: by mail-pf1-x42c.google.com with SMTP id u20so1266839pfn.0 for ; Wed, 05 Aug 2020 11:17:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=JzRY4u611ZdJJJ8DEPsiNDmT76OIm6iIPSor9aPp4Js=; b=Jw+hFPvo12d3SzroLf6sE8yRIdWsovt/PtjWwfq///ibh32KL/jD2mtDE/rxSh1ogT SyooaIom4hPIWQOo6gg2z7xP1SpuyMmWTsJxrc+CTK50OOG6cGha3uFswAlSR4cP3+uQ nSJp+30fuqRJgnij/j54TCYnshNHDjmwswEEYl9+y4HuY2171QHH6sI+XTQYVXswswM2 BMIv9lw61gcPkLqKWxyncXWumq+KcJyD46gKFnY1QViGouHuEthZPHBrmlMkLHe6J6aE xblHOaOzILnVytoOYF1B05xJYN1lY3xNuZyOxvHROVAoQegFk2MGCGbDmMPzHwwSZzu3 VnzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=JzRY4u611ZdJJJ8DEPsiNDmT76OIm6iIPSor9aPp4Js=; b=WNCaP8PRP0rkH+f5cQQbZVlOgYdfF1t7fdAUKqurOM3V9cFc547Rvnzgkzw8A+tZEw WChY+Yr+Rc4py+PS0EnUEYRLGw5Cx3WzHd/9KB9MJGUyi7Qhk15mSp2J2wuhAHt0Gkb9 lPbQqXh/c9LOVmdgyhlFxYFBNg7Y7qsgN8+rdenPSvCWfnPVaXUKLfTVceCF3yYHzbQX qUMN2lbRE0tJaRZ3QSG4vdXlijrI7hrH19VaetCBDQs1J2f1wflwYt3CqVKusrT9IjPk qUZuJY07xy6K34xkChQIEtj4qqPlcFRBbieAG+uAYtUCEmbooNJ0+4iqxZ+huDdpTHrz yLnQ== X-Gm-Message-State: AOAM530jxP5bpPVY377bkwv0/sqV4spd9dwoI25Qm7QtQUJmzyYNblb1 7gtom9mIkC3mHWIhQO2FHW7T6vc4Qa8= X-Google-Smtp-Source: ABdhPJx/AW+EHhwLcrEOO45nyLyUnDkbKDWiA+7hiCpLk5p0G8iMv8chARC97f4c5P9Z9jwn29HXQw== X-Received: by 2002:a63:1a44:: with SMTP id a4mr4130118pgm.281.1596651462691; Wed, 05 Aug 2020 11:17:42 -0700 (PDT) Received: from Rfoley-MA01.hsd1.ma.comcast.net ([2601:199:4480:60c0:38ab:50b1:ff8a:26ef]) by smtp.gmail.com with ESMTPSA id a15sm3670196pfo.185.2020.08.05.11.17.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Aug 2020 11:17:41 -0700 (PDT) From: Robert Foley To: qemu-devel@nongnu.org Subject: [PATCH v1 16/21] target/rx: add BQL to do_interrupt and cpu_exec_interrupt Date: Wed, 5 Aug 2020 14:12:58 -0400 Message-Id: <20200805181303.7822-17-robert.foley@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200805181303.7822-1-robert.foley@linaro.org> References: <20200805181303.7822-1-robert.foley@linaro.org> Received-SPF: pass client-ip=2607:f8b0:4864:20::42c; envelope-from=robert.foley@linaro.org; helo=mail-pf1-x42c.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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 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: robert.foley@linaro.org, Yoshinori Sato , cota@braap.org, peter.puhov@linaro.org, pbonzini@redhat.com, alex.bennee@linaro.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This is part of a series of changes to remove the implied BQL from the common code of cpu_handle_interrupt and cpu_handle_exception. As part of removing the implied BQL from the common code, we are pushing the BQL holding down into the per-arch implementation functions of do_interrupt and cpu_exec_interrupt. The purpose of this set of changes is to set the groundwork so that an arch could move towards removing the BQL from the cpu_handle_interrupt/exception paths. This approach was suggested by Paolo Bonzini. For reference, here are two key posts in the discussion, explaining the reasoning/benefits of this approach. https://lists.gnu.org/archive/html/qemu-devel/2020-07/msg08731.html https://lists.gnu.org/archive/html/qemu-devel/2020-08/msg00044.html Signed-off-by: Robert Foley --- target/rx/helper.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/target/rx/helper.c b/target/rx/helper.c index a6a337a311..a456b727ed 100644 --- a/target/rx/helper.c +++ b/target/rx/helper.c @@ -48,6 +48,10 @@ void rx_cpu_do_interrupt(CPUState *cs) CPURXState *env = &cpu->env; int do_irq = cs->interrupt_request & INT_FLAGS; uint32_t save_psw; + bool bql = !qemu_mutex_iothread_locked(); + if (bql) { + qemu_mutex_lock_iothread(); + } env->in_sleep = 0; @@ -117,6 +121,9 @@ void rx_cpu_do_interrupt(CPUState *cs) (vec & 0xff), expname); } env->regs[0] = env->isp; + if (bql) { + qemu_mutex_unlock_iothread(); + } } bool rx_cpu_exec_interrupt(CPUState *cs, int interrupt_request) @@ -124,6 +131,7 @@ bool rx_cpu_exec_interrupt(CPUState *cs, int interrupt_request) RXCPU *cpu = RXCPU(cs); CPURXState *env = &cpu->env; int accept = 0; + qemu_mutex_lock_iothread(); /* hardware interrupt (Normal) */ if ((interrupt_request & CPU_INTERRUPT_HARD) && env->psw_i && (env->psw_ipl < env->req_ipl)) { @@ -138,8 +146,10 @@ bool rx_cpu_exec_interrupt(CPUState *cs, int interrupt_request) } if (accept) { rx_cpu_do_interrupt(cs); + qemu_mutex_unlock_iothread(); return true; } + qemu_mutex_unlock_iothread(); return false; }