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=-21.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=ham 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 26E4EC433E9 for ; Wed, 17 Mar 2021 14:18:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C4B6164F67 for ; Wed, 17 Mar 2021 14:18:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231779AbhCQOR2 (ORCPT ); Wed, 17 Mar 2021 10:17:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52462 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231826AbhCQORT (ORCPT ); Wed, 17 Mar 2021 10:17:19 -0400 Received: from mail-qt1-x849.google.com (mail-qt1-x849.google.com [IPv6:2607:f8b0:4864:20::849]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D79F1C06174A for ; Wed, 17 Mar 2021 07:17:18 -0700 (PDT) Received: by mail-qt1-x849.google.com with SMTP id v18so4041607qtx.0 for ; Wed, 17 Mar 2021 07:17:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=KrfxD88Ict/v6ngLTLvsT+oMLpFGTSrf7Eslq0SGM14=; b=a+nv8X7pyir1+SV83VwUJ4vj+AHhzDv9PQ9WnWuQqlWQwiB8a746kscytqy4ej1iuw eyas/id66NAzXCPbs1TSyWUPg0J1tAfqygJ563ZEyLL86DAMxCXR1eoiH5rVUm6wwKsN crGLP6vZayX2cQNy4hcQz8SC03UJwBdpmg407s9BSCKHMY6GoXRntodV5QOCc7JdoIdV zhW+OWR5QMi/4VcTh3g3DTA6Q8Q2/Z/aXggxBg1pEDZVGOiCxDLIZZoC5Se7sXzaEtjn pr0I3chBsy50GvwK9oKIj76iUUqJwg6uv+nTrysi6egixhFVdjdZQzkMPVQ/2bWl5qLl Dfqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=KrfxD88Ict/v6ngLTLvsT+oMLpFGTSrf7Eslq0SGM14=; b=XpUCxlj4Fyx1RdRsj7AphWjjfNvQWSEc8UqC6BqoJnpljY702wvQNxRPk8PweNpnTp 8WgAmiEIo4gy49LQ9Ho7F/Jb5BlPKDyR3sKU66SL2LQA8g9bdF9NfHTQ+rNDdl5WeX89 XXrCV4U1SdiI5URsDqbKmbk+UddmtafnWkDa8b4Cm7pPqNDw1eFmaA0fKRBt+CJhGnPW tXD9w76fifcKM9/t2Uc04JcbX+ZXsn5cEdx3bu99XZ/Iwz6637wYEXYsTHRgA0zYI3RV 0Ra7utFPLMsW7tVSDjIL3UCWCbzrK+qi7TrmIHu+pVJjGR/Njc+MIyd0lJZK/PnjKsGK CDDA== X-Gm-Message-State: AOAM530Ki7PrhqQnxDek6Xv7uUjeF6KsK1Y6FqdkvK9HTfW549OS1O25 a4bAQGEnHEnJfeMRcHbH+rOOucyTznKY X-Google-Smtp-Source: ABdhPJzkVS1O87T4WUzd78oVRcatodCw8tdcjCnylMKpUhZ05gMFuwQ7e3RhsN9PT90TU72c/bE143W9PeYp X-Received: from r2d2-qp.c.googlers.com ([fda3:e722:ac3:10:28:9cb1:c0a8:1652]) (user=qperret job=sendgmr) by 2002:ad4:472d:: with SMTP id l13mr5273536qvz.17.1615990637862; Wed, 17 Mar 2021 07:17:17 -0700 (PDT) Date: Wed, 17 Mar 2021 14:17:12 +0000 In-Reply-To: <20210315143536.214621-34-qperret@google.com> Message-Id: <20210317141714.383046-1-qperret@google.com> Mime-Version: 1.0 References: <20210315143536.214621-34-qperret@google.com> X-Mailer: git-send-email 2.31.0.rc2.261.g7f71774620-goog Subject: [PATCH 0/2] Fixes for FWB From: Quentin Perret To: qperret@google.com Cc: catalin.marinas@arm.com, will@kernel.org, maz@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, android-kvm@google.com, seanjc@google.com, linux-kernel@vger.kernel.org, robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, tabba@google.com, ardb@kernel.org, mark.rutland@arm.com, dbrazdil@google.com, mate.toth-pal@arm.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi folks, This is an alternative solution to the KVM_PGTABLE_PROT_S2_NOFWB patch I shared earlier (and which is a bit of a hack). With this series we basically force FWB off for the host stage-2, even when the CPUs support it. This is done by passing flags to the pgtable init function, and propagating it down where needed. It's a bit more intrusive, but cleaner conceptually. Thoughts? Thanks, Quentin Quentin Perret (2): KVM: arm64: Introduce KVM_PGTABLE_S2_NOFWB Stage-2 flag KVM: arm64: Disable FWB in host stage-2 arch/arm64/include/asm/kvm_pgtable.h | 19 +++++++++-- arch/arm64/include/asm/pgtable-prot.h | 4 +-- arch/arm64/kvm/hyp/nvhe/mem_protect.c | 6 ++-- arch/arm64/kvm/hyp/pgtable.c | 49 +++++++++++++++++---------- 4 files changed, 52 insertions(+), 26 deletions(-) -- 2.31.0.rc2.261.g7f71774620-goog