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=-4.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 E68FDC433DF for ; Sun, 5 Jul 2020 18:18:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C06472073E for ; Sun, 5 Jul 2020 18:18:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593973093; bh=ZcyrfoWN8MHHgOfd7nwKxw3dttJq6mqbG1jYnjHLddQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=IUmw25bfeZE/ZYtG+B9KLpvfPL8t8ur6jtJD7uXeQcwbNzs975Dv4nwGLUlDH39ap rwz+sjxQAUQaSU6BtfcY+wR3IS77IHPtUQnSsqe7qLy1VyWCHMyDiZgiUm6yyugqas WcYUDzmqIvKHrB5++hvuEqs/ni10hoBhbZ+cDrLU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727962AbgGESSM (ORCPT ); Sun, 5 Jul 2020 14:18:12 -0400 Received: from mail.kernel.org ([198.145.29.99]:53906 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727859AbgGESSL (ORCPT ); Sun, 5 Jul 2020 14:18:11 -0400 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5521B20720; Sun, 5 Jul 2020 18:18:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593973091; bh=ZcyrfoWN8MHHgOfd7nwKxw3dttJq6mqbG1jYnjHLddQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fMwO1tF7X+Qe3aFk1yGRRfk0zU6kFp6AxXSN2NRPvaP6MYjEbP4+y2WQaKMRfXVFh Hw7lWfl8t5bqOFxXCYUhdI4/glZ8TV0VMcoZ70b3tW+XqWGw1kikGQzDNVBXc/8WwE c3Gn0NIzBL2kYtDE+MSTmycyMkPOKbFj2+9ssHiY= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=wait-a-minute.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1js9DN-009Dpy-Rr; Sun, 05 Jul 2020 19:18:09 +0100 From: Marc Zyngier To: Alexander Graf , kvmarm@lists.cs.columbia.edu Cc: kernel-team@android.com, James Morse , Julien Thierry , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] KVM: arm64: Change default caching mode for {PEND, PROP}BASER.outer Date: Sun, 5 Jul 2020 19:18:03 +0100 Message-Id: <159397301833.254690.3043556347352831821.b4-ty@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200701140206.8664-1-graf@amazon.com> References: <20200701140206.8664-1-graf@amazon.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: graf@amazon.com, kvmarm@lists.cs.columbia.edu, kernel-team@android.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 1 Jul 2020 16:02:06 +0200, Alexander Graf wrote: > PENDBASER and PROPBASER define the outer caching mode for LPI tables. > The memory backing them may not be outer sharable, so we mark them as nC > by default. This however, breaks Windows on ARM which only accepts > SameAsInner or RaWaWb as values for outer cachability. > > We do today already allow the outer mode to be set to SameAsInner > explicitly, so the easy fix is to default to that instead of nC for > situations when an OS asks for a not fulfillable cachability request. > > [...] Applied to kvm-arm64/next-5.9, thanks! [1/1] KVM: arm64: vgic-its: Change default outer cacheability for {PEND, PROP}BASER commit: 731532176716e2775a5d21115bb9c5c61e0cb704 Cheers, M. -- Without deviation from the norm, progress is not possible.