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 X-Spam-Level: X-Spam-Status: No, score=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no 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 38BE6C43457 for ; Mon, 19 Oct 2020 15:50:15 +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 99D1822284 for ; Mon, 19 Oct 2020 15:50:14 +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="x1NA8XZL" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 99D1822284 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:46636 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kUXQL-0008VY-A9 for qemu-devel@archiver.kernel.org; Mon, 19 Oct 2020 11:50:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50286) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kUXOI-0006y7-KV for qemu-devel@nongnu.org; Mon, 19 Oct 2020 11:48:06 -0400 Received: from mail-ed1-x542.google.com ([2a00:1450:4864:20::542]:41105) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kUXOG-0007aU-Rv for qemu-devel@nongnu.org; Mon, 19 Oct 2020 11:48:06 -0400 Received: by mail-ed1-x542.google.com with SMTP id l24so10753993edj.8 for ; Mon, 19 Oct 2020 08:48:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=8wkdMrxW++g/lqmlcAF149KksYnaPdBXB5LvS1Fjgug=; b=x1NA8XZLkrry33UMmksusrrDg4IqNffCgX106rkB0wqWxgAuCrmXV8qMnPkKg94AeO GdIlabzqIMyEUS1MmwZ1btcRCSvuA8kB9CpDWblODxpU8ZsD1XPd2CjJcLFAw2U98eln u49LAInJPa5hlk4OB6gI47Wr/FuZ1LkoMmbuFaS00H9yXA4Djolv018R2+P6VoSaL+m7 CIALpHsnrUTX5arQolOdPtZI0dpYMh+zhpr69muD6DsE064yvGIWXGTEal2tM6nzbRoY SdUcHoImTaUbIewcBoJzAWW9y6uV/uvMucFNvDuURhDC0AqorRBArS+bbvwb1lvirrup PaUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=8wkdMrxW++g/lqmlcAF149KksYnaPdBXB5LvS1Fjgug=; b=dpgdjdHE/Mgsom8stMgymw7FZwiPWhvu33iJJ/bM9/38Trmquo1TsD3vYTtK/TsnKB sKH29d/ItX41weN66/r7+iwgr3BoVqTs1O5F8e2jrrs2hUSJEXLbY0Mfqu7D/sVHlu/F NpuJ5i6rNmc4JWhtYexfRO71LaEht+buS3BbA1X7ksHejhVIVCRr8Z8hFYAo3QJNeuXE FAN5WI9p1nvbDjKOpouigBWlVW4vA5BQT7H9kdkl88cR9bXII3lVM4T9OVo4heQ1FqO8 O4kY8CZ5qMy/+d7+2PBB4lDNLe9mLqB4Xb5J7SXPAF0xWi9Lk5HPdn6AZ3iwLLE2w6Nb cTPg== X-Gm-Message-State: AOAM530M8wQA5HMJ90R8rIFrlon1leXNxKUApJPh2aSd68V4tKxEuNk6 EEqAJ2A68ZBBoFqB7nkSnt7yXliK2xC7b0jqPyJkyw== X-Google-Smtp-Source: ABdhPJyr2DasMtoAR744maKN/5HKDgGQBwcFC9+hDMsIKgCuYc/N5FMD6VQvzyep8wlF0C35MioewXAWIik5KpiiUUY= X-Received: by 2002:a50:9ea6:: with SMTP id a35mr494172edf.52.1603122483571; Mon, 19 Oct 2020 08:48:03 -0700 (PDT) MIME-Version: 1.0 References: <20201016210754.818257-1-richard.henderson@linaro.org> In-Reply-To: <20201016210754.818257-1-richard.henderson@linaro.org> From: Peter Maydell Date: Mon, 19 Oct 2020 16:47:52 +0100 Message-ID: Subject: Re: [PATCH v2 0/2] target/arm: Fix tlb flush page vs tbi To: Richard Henderson Content-Type: text/plain; charset="UTF-8" Received-SPF: pass client-ip=2a00:1450:4864:20::542; envelope-from=peter.maydell@linaro.org; helo=mail-ed1-x542.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: qemu-arm , QEMU Developers Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, 16 Oct 2020 at 22:07, Richard Henderson wrote: > > Since the FAR_ELx fix at 38d931687fa1, it is reported that > page granularity flushing is broken. > > This makes sense, since TCG will record the entire virtual > address in its TLB, not simply the 56 significant bits. > With no other TCG support, the ARM backend should require > 256 different page flushes to clear the virtual address of > any possible tag. > > So I added a new tcg interface that allows passing the size > of the virtual address. I thought a simple bit-count was a > cleaner interface than passing in a mask, since it means that > we couldn't be passed nonsensical masks like 0xdeadbeef. It > also makes it easy to re-direct special cases. > > Changes for v2: > * Add encode_pbm_to_runon/+decode_runon_to_pbm helpers (pmm). Applied to target-arm.next, thanks. -- PMM