From patchwork Wed Aug 5 18:13:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Foley X-Patchwork-Id: 11702211 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 5EF08913 for ; Wed, 5 Aug 2020 18:29:40 +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 3450D22CB3 for ; Wed, 5 Aug 2020 18:29:40 +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="ppsj5mQY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3450D22CB3 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]:33474 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k3OAU-0006Er-Te for patchwork-qemu-devel@patchwork.kernel.org; Wed, 05 Aug 2020 14:29:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50260) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k3NzB-0004zb-RM for qemu-devel@nongnu.org; Wed, 05 Aug 2020 14:17:57 -0400 Received: from mail-pl1-x641.google.com ([2607:f8b0:4864:20::641]:41044) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1k3Nz9-0006XG-Ub for qemu-devel@nongnu.org; Wed, 05 Aug 2020 14:17:57 -0400 Received: by mail-pl1-x641.google.com with SMTP id f10so830885plj.8 for ; Wed, 05 Aug 2020 11:17:55 -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=f4dp87j0JbOgZeF9Q5qKD4L3G1MqZ8pb/SPlrQlUp44=; b=ppsj5mQYzg/Kr8tUEwM3tmcuTjfMRCrWF4RrbFmBPoemT/+eavST4FAzusKdk2UUAI bIfBxQRoMLAgPliH+m1CrXTBld+ILPMjtZkOkw3LwwDHYdWPGlPvRsqMg3yBy/Y/5B5v 6foe2wskP6azX/c+GclfKEOTZ+QDlKCxgHhSJ9ZryXg6nX0zUo6m66BjGAYWQcbcVYnj VlhTt0K8b/nnkg+FCSsVNIwfkVqNMfiE4kLTlQY0qEK3euuNZz+fIIvylURCsF9ItYDf /zt/sqEC3+Sq8CzrYnJlGW626qVn5JhjZWiQB6SXvbQotfp0GWo5jFQON1pDjvD2A2q/ 7L6A== 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=f4dp87j0JbOgZeF9Q5qKD4L3G1MqZ8pb/SPlrQlUp44=; b=GiZ2LE3AZ+6uLliPTgb4RA7sXN3cHWe2O08c6BMrv+REOzMk5Nq6ul+/jH9LcZ+iMN uRLHdh6c0zXvuxcE5LaZgzlad91A1LfBh2HrlwlmUk0aii57DOhLJe/A2dGaoIZeUW02 0xpQuxGB5UoNl9yooXwzcdvzFxxKI+ETDVKm8c9QQbVN4rs6Kx0Zrz2tVV0Lu3/xQEiV lLVVoXFxMjzPCT0NNU68wxUfvckrXFFwSK0/7dVLtamdkJ22C+k5At1Oqt0agjyDsLlz pdMhTU7YpqTznaTeiIZqUz0RuV1t7tQ1xhHuRYtehFDJBVgGQr9ru0TIC0LTre1GQqYm nsJw== X-Gm-Message-State: AOAM531RfA2MloInkold5lBcSRnA5IvYvtGYY3H7bN6FOfqFgxTcfa1I +wd2e5WXz8/+TbzolrvAqEVwwpNV8x8= X-Google-Smtp-Source: ABdhPJwS1OZeyatJagggET6+gLKyYY5uNtT278Rqy94M+Vb+2QkJSIHtUyrEiVlQJrhsHVleqfPKeA== X-Received: by 2002:a17:90b:14d1:: with SMTP id jz17mr33704pjb.98.1596651474313; Wed, 05 Aug 2020 11:17:54 -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.185.2020.08.05.11.17.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Aug 2020 11:17:53 -0700 (PDT) From: Robert Foley To: qemu-devel@nongnu.org Subject: [PATCH v1 21/21] target/xtensa: add BQL to do_interrupt and cpu_exec_interrupt Date: Wed, 5 Aug 2020 14:13:03 -0400 Message-Id: <20200805181303.7822-22-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::641; envelope-from=robert.foley@linaro.org; helo=mail-pl1-x641.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, Max Filippov , 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/xtensa/exc_helper.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/target/xtensa/exc_helper.c b/target/xtensa/exc_helper.c index 01d1e56feb..fd33a56847 100644 --- a/target/xtensa/exc_helper.c +++ b/target/xtensa/exc_helper.c @@ -200,6 +200,7 @@ void xtensa_cpu_do_interrupt(CPUState *cs) XtensaCPU *cpu = XTENSA_CPU(cs); CPUXtensaState *env = &cpu->env; + qemu_mutex_lock_iothread(); if (cs->exception_index == EXC_IRQ) { qemu_log_mask(CPU_LOG_INT, "%s(EXC_IRQ) level = %d, cintlevel = %d, " @@ -252,6 +253,7 @@ void xtensa_cpu_do_interrupt(CPUState *cs) break; } check_interrupts(env); + qemu_mutex_unlock_iothread(); } #else void xtensa_cpu_do_interrupt(CPUState *cs)