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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D7CDC001DE for ; Mon, 31 Jul 2023 20:36:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230181AbjGaUgM (ORCPT ); Mon, 31 Jul 2023 16:36:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55174 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230023AbjGaUgL (ORCPT ); Mon, 31 Jul 2023 16:36:11 -0400 Received: from mail-qt1-x833.google.com (mail-qt1-x833.google.com [IPv6:2607:f8b0:4864:20::833]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1890D1BC6 for ; Mon, 31 Jul 2023 13:36:06 -0700 (PDT) Received: by mail-qt1-x833.google.com with SMTP id d75a77b69052e-4036bd4fff1so80561cf.0 for ; Mon, 31 Jul 2023 13:36:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1690835765; x=1691440565; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=8WbRt22akgzv4PmYRoTv7Z60VgxgxYtdGWVmvWN3QQU=; b=S48GXM2S/zOssa/4HGYWA/fi14zXxpeMV2F4C7CVir22G8F1rsCFPMpbbATKKTGtDB 64U04V9zqc3NX/KcDqqznzevwdH+LBQzjjWkXhUJhWjREYzmjnwgZfC3FYc5IrYNUBlm LY/EUvpLCfaeKdgtW8bCez7DItwI3/PYoIvy7INGK7YD0YSomsBbivsNBTVfKNu4nBdo xivL5QLBIY+NVve5Wz1jLiXbHQ5tlLXN7oYO0s/LfS46XwncPU8xO8zWDxBIMO3Easl+ guS7RQ3/hKev8L86c/bpFnn92PLQF1TIWg60T0w21WW/l5BAv1hI0kYaSnXEA5R3MsmC +C9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690835765; x=1691440565; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=8WbRt22akgzv4PmYRoTv7Z60VgxgxYtdGWVmvWN3QQU=; b=bXKNY3WOmIx7aXr23kMDDrcn8P1SlkDkIKoRlleSj53y8EOChv0CF2YvgvkeWub9lV sYYsCbuwRVVyFDgPzxEFhqIS8hYk2zuW0rgEDAHhBf0GRikVYY3RANBxlapZPfz2TBbo pqRJmd0SVoWdn81Gd+76zEphZcgCAIccdRDtcrFSOSZD7igYlYS4AiELlMjVeear9RoK OrGEkZc+1P6UuTU46g6EMRIW+aO7r1tsZm33pWkqFEiyFAs4I9rqJJ9fB84RRHbcx1in A3Ehw2BF/DPbdn+cRnL+MGF69g6rSna4aoL8EK3nWsYLaCtueOnT+1MeRfuPl7r0gPyr il6Q== X-Gm-Message-State: ABy/qLYewkHl0ncmNUpDoPn4uZv5HVsSthPW0FyQbXcDUHM11h8sG1oE dNcCpaehueCc183sX4a/jwzxlvQh5+7S8ZfN+hVzQA== X-Google-Smtp-Source: APBJJlEmoOsErptso+JLUNi7GHGxX5qEgT6biVyV0lbNK73KMKgCiYEb0JJeNHAmZZOJJPW+PoidP5ENk119vh3duf0= X-Received: by 2002:ac8:7f02:0:b0:407:4aa8:c5ba with SMTP id f2-20020ac87f02000000b004074aa8c5bamr366494qtk.14.1690835765004; Mon, 31 Jul 2023 13:36:05 -0700 (PDT) MIME-Version: 1.0 References: <20230729004144.1054885-1-seanjc@google.com> In-Reply-To: <20230729004144.1054885-1-seanjc@google.com> From: Yu Zhao Date: Mon, 31 Jul 2023 14:35:29 -0600 Message-ID: Subject: Re: [PATCH] KVM: Wrap kvm_{gfn,hva}_range.pte in a per-action union To: Sean Christopherson Cc: Marc Zyngier , Oliver Upton , Huacai Chen , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Paolo Bonzini , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org On Fri, Jul 28, 2023 at 6:41=E2=80=AFPM Sean Christopherson wrote: > > Wrap kvm_{gfn,hva}_range.pte in a union so that future notifier events ca= n > pass event specific information up and down the stack without needing to > constantly expand and churn the APIs. Lockless aging of SPTEs will pass > around a bitmap, and support for memory attributes will pass around the > new attributes for the range. > > Add a "KVM_NO_ARG" placeholder to simplify handling events without an > argument (creating a dummy union variable is midly annoying). > > Opportunstically drop explicit zero-initialization of the "pte" field, as > omitting the field (now a union) has the same effect. > > Cc: Yu Zhao > Link: https://lore.kernel.org/all/CAOUHufagkd2Jk3_HrVoFFptRXM=3DhX2CV8f+M= -dka-hJU4bP8kw@mail.gmail.com > Signed-off-by: Sean Christopherson Acked-by: Yu Zhao