From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B3C90C433F5 for ; Mon, 10 Jan 2022 16:57:19 +0000 (UTC) Received: from localhost ([::1]:56098 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n6xyw-0003KD-Ow for qemu-devel@archiver.kernel.org; Mon, 10 Jan 2022 11:57:18 -0500 Received: from eggs.gnu.org ([209.51.188.92]:33792) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n6xqF-0003rP-RQ; Mon, 10 Jan 2022 11:48:20 -0500 Received: from [2a00:1450:4864:20::42b] (port=38650 helo=mail-wr1-x42b.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1n6xqE-0004Zn-E6; Mon, 10 Jan 2022 11:48:19 -0500 Received: by mail-wr1-x42b.google.com with SMTP id a5so23987572wrh.5; Mon, 10 Jan 2022 08:48:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=wbKyY8i+6gdRwoVsibzZVwedV/1eMkFUsRGPR9OdgNw=; b=iJnB4ZDK/fN3YkYmZX9lWGiZBFeFojH+L6MxKr0RLzyQbi1XO2I1oqmvYp20oS+yJl xwh0kRRguOcpe0aQBgmtHMv+Gh7cb4arEawcte8aHGfQ2cdgsiYlaTWKIUIb2QNE547a i68grUSB8OqhAsmh/k6cb7zXRm4YsGGnIpwEdlj2NP94DzVEx+IARru/EdlLzsNql6T3 JxJrJXz9IYvEuksPYq5PDlLB/FTO73pWDLfg82hwXEEMun7M/9OUD+Z+jd1+mHsL0mmL kHMnXZEmaJraAS0k6aQfqooRHLF+nu2RwSYDqqT11jQR3JtHDlJB6jaAvLgXlgu2cTEL QerQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=wbKyY8i+6gdRwoVsibzZVwedV/1eMkFUsRGPR9OdgNw=; b=3FmxC0XSjkt/+rB0LRdPfc97rBY+UcZazwOgGlm+cjLwkS/9NR6glqouppFH04YIAf y09t8UsmFbcuUi8plbCg/Slr4KEDsvBSjLiC1HBd1cacfFCRzYg8J679x3JH8k21auAb SmOJ+0ckecKozg82Kg3bdpVoBQWb3lVpE91by6af4tcEIE/pHSbRW2lR4UBk8oC/9WqJ rnUG/tdPG6p+A5s0y8XuAW+0A3mUqkSNXJ2XgJinix/E35GFU76cWkLbx+xTilaIWJPH e4VQfBHHysvaOVdKZ9ZmJhUejt9xxqBQ3i5mdkSs/IAhXAOP27d4bqOeiwWr9TTNvsud YjwA== X-Gm-Message-State: AOAM531lROh9EuZ6eOClRqnhnjLf+ds3GpFqAsj9qv5nEppnm2cs416d zCO3efLGRHpHETSmKvrcVCU5t6ZdBTvMkg== X-Google-Smtp-Source: ABdhPJxf62Af8V3QsFfEhbSLm21WZSQc9lfAke973IFNJpNFma7Q1cP34r8g1IsVJop1Em1P7OdvlQ== X-Received: by 2002:adf:e198:: with SMTP id az24mr371216wrb.437.1641833295575; Mon, 10 Jan 2022 08:48:15 -0800 (PST) Received: from li-142ea8cc-3370-11b2-a85c-c55585c2aa0e.ibm.com.com (bzq-79-176-247-38.red.bezeqint.net. [79.176.247.38]) by smtp.gmail.com with ESMTPSA id a6sm3922079wrq.22.2022.01.10.08.48.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Jan 2022 08:48:15 -0800 (PST) From: Idan Horowitz To: qemu-arm@nongnu.org Subject: [PATCH 2/2] target/arm: Bail out early on 0-length tlb range invalidate Date: Mon, 10 Jan 2022 18:47:54 +0200 Message-Id: <20220110164754.1066025-2-idan.horowitz@gmail.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20220110164754.1066025-1-idan.horowitz@gmail.com> References: <20220110164754.1066025-1-idan.horowitz@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2a00:1450:4864:20::42b (failed) Received-SPF: pass client-ip=2a00:1450:4864:20::42b; envelope-from=idan.horowitz@gmail.com; helo=mail-wr1-x42b.google.com X-Spam_score_int: -12 X-Spam_score: -1.3 X-Spam_bar: - X-Spam_report: (-1.3 / 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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, richard.henderson@linaro.org, Idan Horowitz , qemu-devel@nongnu.org, pbonzini@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" If the given range specifies no addresses to be flushed there's no reason to schedule a function on all CPUs that does nothing. Signed-off-by: Idan Horowitz --- target/arm/helper.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/target/arm/helper.c b/target/arm/helper.c index cfca0f5ba6..1e819835c2 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -4564,6 +4564,10 @@ static void do_rvae_write(CPUARMState *env, uint64_t value, length = tlbi_aa64_range_get_length(env, value); bits = tlbbits_for_regime(env, one_idx, baseaddr); + if (length == 0) { + return; + } + if (synced) { tlb_flush_range_by_mmuidx_all_cpus_synced(env_cpu(env), baseaddr, -- 2.33.1