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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A2F1C48BF6 for ; Mon, 26 Feb 2024 23:45:59 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 843494401CC; Mon, 26 Feb 2024 18:45:59 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 7F33344017F; Mon, 26 Feb 2024 18:45:59 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6946B4401CC; Mon, 26 Feb 2024 18:45:59 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 5830A44017F for ; Mon, 26 Feb 2024 18:45:59 -0500 (EST) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 098FC1C02A4 for ; Mon, 26 Feb 2024 23:45:59 +0000 (UTC) X-FDA: 81835590438.09.0208DE5 Received: from out-177.mta1.migadu.com (out-177.mta1.migadu.com [95.215.58.177]) by imf21.hostedemail.com (Postfix) with ESMTP id 376841C0019 for ; Mon, 26 Feb 2024 23:45:56 +0000 (UTC) Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=NaKGaBHZ; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf21.hostedemail.com: domain of oliver.upton@linux.dev designates 95.215.58.177 as permitted sender) smtp.mailfrom=oliver.upton@linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1708991157; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=EdH1du0G5wZD6cUdSfsT1MbgK9PvHKwZ7muuiMKD95w=; b=qllZGryk2zXyhGuF16KHTm09Oh6txlLdeIHDx5v9bau0coPx3ivuBc0TS4lm4QjlbJALvK tgzU39mUEXBWaFuYvK7+5Z+lcVAhOS+TFleWwWU+NDT8Xc6R/e8I2hNd0orOBSzTNANIot Cwe0DJP9ix5H8VpGkNvIBhvQ9kfCqkE= ARC-Authentication-Results: i=1; imf21.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=NaKGaBHZ; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf21.hostedemail.com: domain of oliver.upton@linux.dev designates 95.215.58.177 as permitted sender) smtp.mailfrom=oliver.upton@linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1708991157; a=rsa-sha256; cv=none; b=FXMdtKu+JVkezVIXVQ/SFMuzKP1IsZzBSUX54NQG11hSu3jwMF4Rn0h9qTCS2qgBuCBdA6 R2FmWVj8QgjgEe5VREXOEKGq4aE0CncvrITFngU5QFAqUa9qLfI5xm0X9TnGqjjPqG+mlq 6zte2QJU7PnAIf9W+tNoLhyfUoGrJV8= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1708991153; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EdH1du0G5wZD6cUdSfsT1MbgK9PvHKwZ7muuiMKD95w=; b=NaKGaBHZCLVlpYSRjVgXamnaISV5l68zDvg3ykwj2P7sG5JFqwTKKJPKbQUQAAvHNExRkq /KACdnHBqpI3skPgVo2vn3IxvfvqSLRY2PcRImxTBSdVM5ZudrJdUs2cdWAxg3HoxWp7zD Q0H7mX3cq0nHnXgBMFatJXL1ou1tDF8= From: Oliver Upton To: wangjinchao@xfusion.com, shahuang@redhat.com, catalin.marinas@arm.com, ryan.roberts@arm.com, stefanha@redhat.com, yi.l.liu@intel.com, david@redhat.com, Jason Gunthorpe , lpieralisi@kernel.org, gshan@redhat.com, brauner@kernel.org, rananta@google.com, alex.williamson@redhat.com, suzuki.poulose@arm.com, kevin.tian@intel.com, surenb@google.com, ricarkol@google.com, linus.walleij@linaro.org, james.morse@arm.com, ankita@nvidia.com, ardb@kernel.org, will@kernel.org, akpm@linux-foundation.org, maz@kernel.org, bhe@redhat.com, reinette.chatre@intel.com, yuzenghui@huawei.com, andreyknvl@gmail.com, linux-mm@kvack.org, mark.rutland@arm.com Cc: Oliver Upton , danw@nvidia.com, acurrid@nvidia.com, apopple@nvidia.com, mochs@nvidia.com, linux-kernel@vger.kernel.org, aniketa@nvidia.com, cjia@nvidia.com, kvm@vger.kernel.org, jhubbard@nvidia.com, kvmarm@lists.linux.dev, zhiw@nvidia.com, kwankhede@nvidia.com, vsethi@nvidia.com, linux-arm-kernel@lists.infradead.org, targupta@nvidia.com Subject: Re: [PATCH v9 0/4] KVM: arm64: Allow the VM to select DEVICE_* and NORMAL_NC for IO memory Date: Mon, 26 Feb 2024 23:45:30 +0000 Message-ID: <170899100569.1405597.5047894183843333522.b4-ty@linux.dev> In-Reply-To: <20240224150546.368-1-ankita@nvidia.com> References: <20240224150546.368-1-ankita@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: 376841C0019 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: a6um499h9f83oj8oukfoqtqodb614d48 X-HE-Tag: 1708991156-129022 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sat, 24 Feb 2024 20:35:42 +0530, ankita@nvidia.com wrote: > From: Ankit Agrawal > > Currently, KVM for ARM64 maps at stage 2 memory that is considered device > with DEVICE_nGnRE memory attributes; this setting overrides (per > ARM architecture [1]) any device MMIO mapping present at stage 1, > resulting in a set-up whereby a guest operating system cannot > determine device MMIO mapping memory attributes on its own but > it is always overridden by the KVM stage 2 default. > > [...] High time to get this cooking in -next. Looks like there aren't any conflicts w/ VFIO, but if that changes I've pushed a topic branch to: https://git.kernel.org/pub/scm/linux/kernel/git/oupton/linux.git/log/?h=kvm-arm64/vfio-normal-nc Applied to kvmarm/next, thanks! [1/4] KVM: arm64: Introduce new flag for non-cacheable IO memory https://git.kernel.org/kvmarm/kvmarm/c/c034ec84e879 [2/4] mm: Introduce new flag to indicate wc safe https://git.kernel.org/kvmarm/kvmarm/c/5c656fcdd6c6 [3/4] KVM: arm64: Set io memory s2 pte as normalnc for vfio pci device https://git.kernel.org/kvmarm/kvmarm/c/8c47ce3e1d2c [4/4] vfio: Convey kvm that the vfio-pci device is wc safe https://git.kernel.org/kvmarm/kvmarm/c/a39d3a966a09 -- Best, Oliver